DataSet örnek göndermek

Makale
10/29/2012

Gönder DataSetörnek nasıl bir ado dönmek gösterilmiştir.Göre net DataSetiçinde bir sunucu tarafı ortak dil çalışma zamanı (clr)-saklı yordamı, sonuç olarak ayarlamak için istemci tabanlı. Bu örneğin, saklı bir yordam doldurduğunda yararlı bir DataSetve içinde yer alan verileri işleyen bir sorgunun sonuçlarını kullanarak DataSet. Saklı yordam oluşturur ve doldurur alternatif olarak yararlıdır bir DataSetsıfırdan.Örnek iki sınıf, oluşan DataSetUtilitiesve TestSendDataSet. Yöntem SendDataSetüzerinde DataSetUtilitiessınıf içeriğini iletmek için genel amaçlı bir şekilde uygulayan bir DataSetistemci örneği. DoTestTanımlanan yöntemi TestSendDataSetsınıf doğrular, SendDataSetyöntem inşaat oluşturarak bir DataSetve verilerle doldurma uspGetTwoBOMTestDataTransact-sql saklı yordamı. uspGetTwoBOMTestDataTransact-sql saklı yordamı çalıştırır uspGetBillOfMaterialsyinelemeli sorgu için parametre olarak belirtilen iki ürün reçeteleri için iki kez usp_GetTwoBOMTestDatasaklı yordamını. Normalde, veri kümesi doldurduktan sonra verileri çağırmadan önce değişiklik SendDataSetSonuç olarak ayarlamak için istemci veri kümesi içindeki verileri teslim. Kolaylık için bu örnek verileri değiştirmeden verir.

Ön Koşullar

Oluşturmak ve bu proje aşağıdaki çalıştırmak için aşağıdaki yazılım yüklenmiş olmalıdır:

SQL Serverveya SQL Serverhızlı. Elde edebilirsiniz SQL Serverhızlı şarj ücretsiz SQL ServerExpress belgeleri ve örnekleri Web sitesi
İs available at AdventureWorks veritabanını SQL Servergeliştiricisi Web sitesi
.net Framework sdk 2.0 veya sonraki sürümünü ya da Microsoft Visual Studio 2005 veya sonraki bir sürümü. Elde edebilirsiniz.net Framework sdk ücretsiz.
Ayrıca, aşağıdaki koşulların karşılanması gerekir:
SQL ServerKullanıyorsanız örneğinin clr tümleştirmesi etkinleştirilmiş olması gerekir.
clr tümleştirme etkinleştirmek için aşağıdaki adımları gerçekleştirin:

clr tümleştirme etkinleştirmek
- Aşağıdaki yürütme Transact-SQLkomutları:
sp_configure 'clr enabled', 1

GO

RECONFIGURE

GO

[!NOT]

clr etkinleştirmek için olmalıdır ALTER SETTINGSörtülü üyeleri tarafından düzenlenen sunucu düzeyi izni sysadminve serveradminsabit sunucu rolü.
AdventureWorks veritabanı yüklenmesi gerekir SQL Serverkullanıyorsanız örneği.
Yönetici değilseniz SQL Serverkullandığınız örnek verdiğiniz bir yönetici olması gerekir CreateAssembly yüklemeyi tamamlamak için izni.

Örnek oluşturma

Oluşturun ve aşağıdaki yönergeleri kullanarak örnek çalıştırın:

Visual Studio'nun açın veya.net Framework buyurmak-e sevketmek.
Gerekirse, örnek bir dizin oluşturun. Bu örnekte, C:\MySample kullanacağız.
C:\MySample içinde oluşturmak SendDataSet.vb(için Visual Basic örnek) veya SendDataSet.cs(için C# örnek) ve uygun Visual Basic veya C# örnek kod (aşağıda) dosyasına kopyalayın.
Komut satırı isteminden gerekli derleme dil seçiminize bağlı olarak, aşağıdakilerden biri yürüterek örnek kod derlemesi.
- Vbc /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Data.dll,C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.dll,C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Xml.dll /target:library SendDataSet.vb
- Csc /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Data.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.dll /reference:C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Xml.dll /target:library SendDataSet.cs
Kopya Transact-SQLyükleme kodu olarak kaydedin ve dosyayı içine Install.sqlörnek Rehberi.
Örnek bir dizindeki diğer sonra yüklü olup olmadığını C:\MySample\, dosya düzenleme Install.sqlBu konumu göstermesi için belirtildiği gibi.
Kurul, saklı yordam ve işlevlerini yürüterek dağıtma
- sqlcmd -E -I -i install.sql
Kopya Transact-SQLkomut dosyasını bir dosyaya test ve kaydetme gibi test.sqlörnek dizinindeki.
- sqlcmd -E -I -i test.sql
Kopya Transact-SQLTemizleme komut dosyası olarak kaydedin ve dosyayı içine cleanup.sqlörnek Rehberi.
Aşağıdaki komutu komut dosyasını yürütün
- sqlcmd -E -I -i cleanup.sql

Örnek kod

Bu örnek kod listeleri şunlardır:

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;


    public static class DataSetUtilities
    {

        public static void SendDataSet(DataSet ds)
        {
            if (ds == null)
            {
                throw new ArgumentException("SendDataSet requires a non-null data set.");
            }
            else
            {
                foreach (DataTable dt in ds.Tables)
                {
                    SendDataTable(dt);
                }
            }
        }


        public static void SendDataTable(DataTable dt)
        {
            bool[] coerceToString;  // Do we need to coerce this column to string?
            SqlMetaData[] metaData = ExtractDataTableColumnMetaData(dt, out coerceToString);

            SqlDataRecord record = new SqlDataRecord(metaData);
            SqlPipe pipe = SqlContext.Pipe;
            pipe.SendResultsStart(record);
            try
            {
                foreach (DataRow row in dt.Rows)
                {
                    for (int index = 0; index < record.FieldCount; index++)
                    {
                        object value = row[index];
                        if (null != value && coerceToString[index])
                            value = value.ToString();
                        record.SetValue(index, value);
                    }

                    pipe.SendResultsRow(record);
                }
            }
            finally
            {
                pipe.SendResultsEnd();
            }
        }

        private static SqlMetaData[] ExtractDataTableColumnMetaData(DataTable dt, out bool[] coerceToString)
        {
            SqlMetaData[] metaDataResult = new SqlMetaData[dt.Columns.Count];
            coerceToString = new bool[dt.Columns.Count];
            for (int index = 0; index < dt.Columns.Count; index++)
            {
                DataColumn column = dt.Columns[index];
                metaDataResult[index] = SqlMetaDataFromColumn(column, out coerceToString[index]);
            }

            return metaDataResult;
        }

        private static Exception InvalidDataTypeCode(TypeCode code)
        {
            return new ArgumentException("Invalid type: " + code);
        }

        private static Exception UnknownDataType(Type clrType)
        {
            return new ArgumentException("Unknown type: " + clrType);
        }

        private static SqlMetaData SqlMetaDataFromColumn(DataColumn column, out bool coerceToString)
        {
            coerceToString = false;
            SqlMetaData sql_md = null;
            Type clrType = column.DataType;
            string name = column.ColumnName;
            switch (Type.GetTypeCode(clrType))
            {
                case TypeCode.Boolean: sql_md = new SqlMetaData(name, SqlDbType.Bit); break;
                case TypeCode.Byte: sql_md = new SqlMetaData(name, SqlDbType.TinyInt); break;
                case TypeCode.Char: sql_md = new SqlMetaData(name, SqlDbType.NVarChar, 1); break;
                case TypeCode.DateTime: sql_md = new SqlMetaData(name, SqlDbType.DateTime); break;
                case TypeCode.DBNull: throw InvalidDataTypeCode(TypeCode.DBNull);
                case TypeCode.Decimal: sql_md = new SqlMetaData(name, SqlDbType.Decimal, 18, 0); break;
                case TypeCode.Double: sql_md = new SqlMetaData(name, SqlDbType.Float); break;
                case TypeCode.Empty: throw InvalidDataTypeCode(TypeCode.Empty);
                case TypeCode.Int16: sql_md = new SqlMetaData(name, SqlDbType.SmallInt); break;
                case TypeCode.Int32: sql_md = new SqlMetaData(name, SqlDbType.Int); break;
                case TypeCode.Int64: sql_md = new SqlMetaData(name, SqlDbType.BigInt); break;
                case TypeCode.SByte: throw InvalidDataTypeCode(TypeCode.SByte);
                case TypeCode.Single: sql_md = new SqlMetaData(name, SqlDbType.Real); break;
                case TypeCode.String: sql_md = new SqlMetaData(name, SqlDbType.NVarChar, column.MaxLength);
                    break;
                case TypeCode.UInt16: throw InvalidDataTypeCode(TypeCode.UInt16);
                case TypeCode.UInt32: throw InvalidDataTypeCode(TypeCode.UInt32);
                case TypeCode.UInt64: throw InvalidDataTypeCode(TypeCode.UInt64);
                case TypeCode.Object:
                    sql_md = SqlMetaDataFromObjectColumn(name, column, clrType);
                    if (sql_md == null)
                    {
                        // Unknown type, try to treat it as string;
                        sql_md = new SqlMetaData(name, SqlDbType.NVarChar, column.MaxLength);
                        coerceToString = true;
                    }
                    break;

                default: throw UnknownDataType(clrType);
            }

            return sql_md;
        }

        private static SqlMetaData SqlMetaDataFromObjectColumn(string name, DataColumn column, Type clrType)
        {
            SqlMetaData sql_md = null;
            if (clrType == typeof(System.Byte[]) || clrType == typeof(SqlBinary) || clrType == typeof(SqlBytes) ||
        clrType == typeof(System.Char[]) || clrType == typeof(SqlString) || clrType == typeof(SqlChars))
                sql_md = new SqlMetaData(name, SqlDbType.VarBinary, column.MaxLength);
            else if (clrType == typeof(System.Guid))
                sql_md = new SqlMetaData(name, SqlDbType.UniqueIdentifier);
            else if (clrType == typeof(System.Object))
                sql_md = new SqlMetaData(name, SqlDbType.Variant);
            else if (clrType == typeof(SqlBoolean))
                sql_md = new SqlMetaData(name, SqlDbType.Bit);
            else if (clrType == typeof(SqlByte))
                sql_md = new SqlMetaData(name, SqlDbType.TinyInt);
            else if (clrType == typeof(SqlDateTime))
                sql_md = new SqlMetaData(name, SqlDbType.DateTime);
            else if (clrType == typeof(SqlDouble))
                sql_md = new SqlMetaData(name, SqlDbType.Float);
            else if (clrType == typeof(SqlGuid))
                sql_md = new SqlMetaData(name, SqlDbType.UniqueIdentifier);
            else if (clrType == typeof(SqlInt16))
                sql_md = new SqlMetaData(name, SqlDbType.SmallInt);
            else if (clrType == typeof(SqlInt32))
                sql_md = new SqlMetaData(name, SqlDbType.Int);
            else if (clrType == typeof(SqlInt64))
                sql_md = new SqlMetaData(name, SqlDbType.BigInt);
            else if (clrType == typeof(SqlMoney))
                sql_md = new SqlMetaData(name, SqlDbType.Money);
            else if (clrType == typeof(SqlDecimal))
                sql_md = new SqlMetaData(name, SqlDbType.Decimal, SqlDecimal.MaxPrecision, 0);
            else if (clrType == typeof(SqlSingle))
                sql_md = new SqlMetaData(name, SqlDbType.Real);
            else if (clrType == typeof(SqlXml))
                sql_md = new SqlMetaData(name, SqlDbType.Xml);
            else
                sql_md = null;

            return sql_md;
        }
                  
    }
 public static class TestSendDataSet
    {
        private const string TestConnectionString = "context connection=true";
        const int prod1ID = 750; //Product ID of Road-150 Red, 44 bicycle
        const int prod2ID = 751; //Product ID of Road-150 Red, 48 bicycle

        /// <summary>
        /// Invoke a stored procedure to get some bill of material information and 
        /// fill a data set with the two result sets.  Return the data set to the client.
        /// </summary>
        public static void DoTest()
        {
            using (SqlConnection conn = new SqlConnection(TestConnectionString))
            {
                SqlCommand cmd = conn.CreateCommand();
                cmd.CommandText = "usp_GetTwoBOMTestData";
                cmd.CommandType = CommandType.StoredProcedure;

                SqlParameter prod1Param = new SqlParameter("@ProductID1", SqlDbType.Int);
                prod1Param.Value = prod1ID;
                cmd.Parameters.Add(prod1Param);

                SqlParameter prod2Param = new SqlParameter("@ProductID2", SqlDbType.Int);
                prod2Param.Value = prod2ID;
                cmd.Parameters.Add(prod2Param);

                SqlParameter asOfDateParam = new SqlParameter("@AsOfDate", SqlDbType.DateTime);
                asOfDateParam.Value = DateTime.Now;
                cmd.Parameters.Add(asOfDateParam);

                DataSet ds = new DataSet("TestData");
                SqlDataAdapter sda = new SqlDataAdapter(cmd);
                conn.Open();
                sda.Fill(ds);

// Normally, after filling the data set, rather than immediately returning it, 
// the data would be modified before invoking SendDataSet to deliver 
// the data within the data set as a result set to the client.  For simplicity 
// this sample simply returns the data.

                DataSetUtilities.SendDataSet(ds);

            }
        }

    }

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;


    public static class DataSetUtilities
    {

        public static void SendDataSet(DataSet ds)
        {
            if (ds == null)
            {
                throw new ArgumentException("SendDataSet requires a non-null data set.");
            }
            else
            {
                foreach (DataTable dt in ds.Tables)
                {
                    SendDataTable(dt);
                }
            }
        }


        public static void SendDataTable(DataTable dt)
        {
            bool[] coerceToString;  // Do we need to coerce this column to string?
            SqlMetaData[] metaData = ExtractDataTableColumnMetaData(dt, out coerceToString);

            SqlDataRecord record = new SqlDataRecord(metaData);
            SqlPipe pipe = SqlContext.Pipe;
            pipe.SendResultsStart(record);
            try
            {
                foreach (DataRow row in dt.Rows)
                {
                    for (int index = 0; index < record.FieldCount; index++)
                    {
                        object value = row[index];
                        if (null != value && coerceToString[index])
                            value = value.ToString();
                        record.SetValue(index, value);
                    }

                    pipe.SendResultsRow(record);
                }
            }
            finally
            {
                pipe.SendResultsEnd();
            }
        }

        private static SqlMetaData[] ExtractDataTableColumnMetaData(DataTable dt, out bool[] coerceToString)
        {
            SqlMetaData[] metaDataResult = new SqlMetaData[dt.Columns.Count];
            coerceToString = new bool[dt.Columns.Count];
            for (int index = 0; index < dt.Columns.Count; index++)
            {
                DataColumn column = dt.Columns[index];
                metaDataResult[index] = SqlMetaDataFromColumn(column, out coerceToString[index]);
            }

            return metaDataResult;
        }

        private static Exception InvalidDataTypeCode(TypeCode code)
        {
            return new ArgumentException("Invalid type: " + code);
        }

        private static Exception UnknownDataType(Type clrType)
        {
            return new ArgumentException("Unknown type: " + clrType);
        }

        private static SqlMetaData SqlMetaDataFromColumn(DataColumn column, out bool coerceToString)
        {
            coerceToString = false;
            SqlMetaData sql_md = null;
            Type clrType = column.DataType;
            string name = column.ColumnName;
            switch (Type.GetTypeCode(clrType))
            {
                case TypeCode.Boolean: sql_md = new SqlMetaData(name, SqlDbType.Bit); break;
                case TypeCode.Byte: sql_md = new SqlMetaData(name, SqlDbType.TinyInt); break;
                case TypeCode.Char: sql_md = new SqlMetaData(name, SqlDbType.NVarChar, 1); break;
                case TypeCode.DateTime: sql_md = new SqlMetaData(name, SqlDbType.DateTime); break;
                case TypeCode.DBNull: throw InvalidDataTypeCode(TypeCode.DBNull);
                case TypeCode.Decimal: sql_md = new SqlMetaData(name, SqlDbType.Decimal, 18, 0); break;
                case TypeCode.Double: sql_md = new SqlMetaData(name, SqlDbType.Float); break;
                case TypeCode.Empty: throw InvalidDataTypeCode(TypeCode.Empty);
                case TypeCode.Int16: sql_md = new SqlMetaData(name, SqlDbType.SmallInt); break;
                case TypeCode.Int32: sql_md = new SqlMetaData(name, SqlDbType.Int); break;
                case TypeCode.Int64: sql_md = new SqlMetaData(name, SqlDbType.BigInt); break;
                case TypeCode.SByte: throw InvalidDataTypeCode(TypeCode.SByte);
                case TypeCode.Single: sql_md = new SqlMetaData(name, SqlDbType.Real); break;
                case TypeCode.String: sql_md = new SqlMetaData(name, SqlDbType.NVarChar, column.MaxLength);
                    break;
                case TypeCode.UInt16: throw InvalidDataTypeCode(TypeCode.UInt16);
                case TypeCode.UInt32: throw InvalidDataTypeCode(TypeCode.UInt32);
                case TypeCode.UInt64: throw InvalidDataTypeCode(TypeCode.UInt64);
                case TypeCode.Object:
                    sql_md = SqlMetaDataFromObjectColumn(name, column, clrType);
                    if (sql_md == null)
                    {
                        // Unknown type, try to treat it as string;
                        sql_md = new SqlMetaData(name, SqlDbType.NVarChar, column.MaxLength);
                        coerceToString = true;
                    }
                    break;

                default: throw UnknownDataType(clrType);
            }

            return sql_md;
        }

        private static SqlMetaData SqlMetaDataFromObjectColumn(string name, DataColumn column, Type clrType)
        {
            SqlMetaData sql_md = null;
            if (clrType == typeof(System.Byte[]) || clrType == typeof(SqlBinary) || clrType == typeof(SqlBytes) ||
        clrType == typeof(System.Char[]) || clrType == typeof(SqlString) || clrType == typeof(SqlChars))
                sql_md = new SqlMetaData(name, SqlDbType.VarBinary, column.MaxLength);
            else if (clrType == typeof(System.Guid))
                sql_md = new SqlMetaData(name, SqlDbType.UniqueIdentifier);
            else if (clrType == typeof(System.Object))
                sql_md = new SqlMetaData(name, SqlDbType.Variant);
            else if (clrType == typeof(SqlBoolean))
                sql_md = new SqlMetaData(name, SqlDbType.Bit);
            else if (clrType == typeof(SqlByte))
                sql_md = new SqlMetaData(name, SqlDbType.TinyInt);
            else if (clrType == typeof(SqlDateTime))
                sql_md = new SqlMetaData(name, SqlDbType.DateTime);
            else if (clrType == typeof(SqlDouble))
                sql_md = new SqlMetaData(name, SqlDbType.Float);
            else if (clrType == typeof(SqlGuid))
                sql_md = new SqlMetaData(name, SqlDbType.UniqueIdentifier);
            else if (clrType == typeof(SqlInt16))
                sql_md = new SqlMetaData(name, SqlDbType.SmallInt);
            else if (clrType == typeof(SqlInt32))
                sql_md = new SqlMetaData(name, SqlDbType.Int);
            else if (clrType == typeof(SqlInt64))
                sql_md = new SqlMetaData(name, SqlDbType.BigInt);
            else if (clrType == typeof(SqlMoney))
                sql_md = new SqlMetaData(name, SqlDbType.Money);
            else if (clrType == typeof(SqlDecimal))
                sql_md = new SqlMetaData(name, SqlDbType.Decimal, SqlDecimal.MaxPrecision, 0);
            else if (clrType == typeof(SqlSingle))
                sql_md = new SqlMetaData(name, SqlDbType.Real);
            else if (clrType == typeof(SqlXml))
                sql_md = new SqlMetaData(name, SqlDbType.Xml);
            else
                sql_md = null;

            return sql_md;
        }
                  
    }
 public static class TestSendDataSet
    {
        private const string TestConnectionString = "context connection=true";
        const int prod1ID = 750; //Product ID of Road-150 Red, 44 bicycle
        const int prod2ID = 751; //Product ID of Road-150 Red, 48 bicycle

        /// <summary>
        /// Invoke a stored procedure to get some bill of material information and 
        /// fill a data set with the two result sets.  Return the data set to the client.
        /// </summary>
        public static void DoTest()
        {
            using (SqlConnection conn = new SqlConnection(TestConnectionString))
            {
                SqlCommand cmd = conn.CreateCommand();
                cmd.CommandText = "usp_GetTwoBOMTestData";
                cmd.CommandType = CommandType.StoredProcedure;

                SqlParameter prod1Param = new SqlParameter("@ProductID1", SqlDbType.Int);
                prod1Param.Value = prod1ID;
                cmd.Parameters.Add(prod1Param);

                SqlParameter prod2Param = new SqlParameter("@ProductID2", SqlDbType.Int);
                prod2Param.Value = prod2ID;
                cmd.Parameters.Add(prod2Param);

                SqlParameter asOfDateParam = new SqlParameter("@AsOfDate", SqlDbType.DateTime);
                asOfDateParam.Value = DateTime.Now;
                cmd.Parameters.Add(asOfDateParam);

                DataSet ds = new DataSet("TestData");
                SqlDataAdapter sda = new SqlDataAdapter(cmd);
                conn.Open();
                sda.Fill(ds);

// Normally, after filling the data set, rather than immediately returning it, 
// the data would be modified before invoking SendDataSet to deliver 
// the data within the data set as a result set to the client.  For simplicity 
// this sample simply returns the data.

                DataSetUtilities.SendDataSet(ds);

            }
        }

    }

Visual Basic

Imports Microsoft.VisualBasic
Imports System
Imports System.Collections
Imports System.Data
Imports System.Diagnostics
Imports System.Collections.Generic
Imports System.Text
Imports System.Data.SqlClient
Imports System.Data.SqlTypes
Imports Microsoft.SqlServer.Server
Imports System.Runtime.InteropServices

Public Class DataSetUtilities

    Public Shared Sub SendDataSet(ByVal ds As DataSet)
        If ds Is Nothing Then
            Throw New ArgumentException("SendDataSet requires a non-null data set.")
        Else
            For Each dt As DataTable In ds.Tables
                SendDataTable(dt)
            Next
        End If
    End Sub

    Public Shared Sub SendDataTable(ByVal dt As DataTable)
        Dim coerceToString() As Boolean = Nothing ' Do we need to coerce this column to string?
        Dim metaData As SqlMetaData() = ExtractDataTableColumnMetaData(dt, coerceToString)

        Dim record As New SqlDataRecord(metaData)
        Dim pipe As SqlPipe = SqlContext.Pipe
        pipe.SendResultsStart(record)

        Try
            For Each row As DataRow In dt.Rows
                For index As Integer = 0 To record.FieldCount - 1
                    Dim value As Object = row(index)
                    If Nothing Is value AndAlso coerceToString(index) Then
                        value = value.ToString()
                    End If

                    record.SetValue(index, value)
                Next

                pipe.SendResultsRow(record)
            Next
        Finally
            pipe.SendResultsEnd()
        End Try
    End Sub

    Private Shared Function ExtractDataTableColumnMetaData(ByVal dt As DataTable, <Out()> ByRef coerceToString() As Boolean) As SqlMetaData()
        Dim metaDataResult(dt.Columns.Count - 1) As SqlMetaData
        coerceToString = New Boolean(dt.Columns.Count - 1) {}
        For index As Integer = 0 To dt.Columns.Count - 1
            Dim column As DataColumn = dt.Columns(index)
            metaDataResult(index) = SqlMetaDataFromColumn(column, coerceToString(index))
        Next

        Return metaDataResult
    End Function
    Private Shared Function InvalidDataTypeCode(ByVal code As TypeCode) As Exception
        Return New ArgumentException("Invalid type: " & code.ToString())
    End Function

    Private Shared Function UnknownDataType(ByVal clrType As Type) As Exception
        Return New ArgumentException("Unknown type: " & clrType.ToString())
    End Function

    Private Shared Function SqlMetaDataFromColumn(ByVal column As DataColumn, ByRef coerceToString As Boolean) As SqlMetaData
        coerceToString = False
        Dim sql_md As SqlMetaData = Nothing
        Dim clrType As Type = column.DataType
        Dim name As String = column.ColumnName
        Select Case Type.GetTypeCode(clrType)
            Case TypeCode.Boolean
                sql_md = New SqlMetaData(name, SqlDbType.Bit)
            Case TypeCode.Byte
                sql_md = New SqlMetaData(name, SqlDbType.TinyInt)
            Case TypeCode.Char
                sql_md = New SqlMetaData(name, SqlDbType.NVarChar, 1)
            Case TypeCode.DateTime
                sql_md = New SqlMetaData(name, SqlDbType.DateTime)
            Case TypeCode.DBNull
                Throw InvalidDataTypeCode(TypeCode.DBNull)
            Case TypeCode.Decimal
                sql_md = New SqlMetaData(name, SqlDbType.Decimal)
            Case TypeCode.Double
                sql_md = New SqlMetaData(name, SqlDbType.Float)
            Case TypeCode.Empty
                Throw InvalidDataTypeCode(TypeCode.Empty)
            Case TypeCode.Int16
                sql_md = New SqlMetaData(name, SqlDbType.SmallInt)
            Case TypeCode.Int32
                sql_md = New SqlMetaData(name, SqlDbType.Int)
            Case TypeCode.Int64
                sql_md = New SqlMetaData(name, SqlDbType.BigInt)
            Case TypeCode.SByte
                Throw InvalidDataTypeCode(TypeCode.SByte)
            Case TypeCode.Single
                sql_md = New SqlMetaData(name, SqlDbType.Real)
            Case TypeCode.String
                sql_md = New SqlMetaData(name, SqlDbType.NVarChar, column.MaxLength)
            Case TypeCode.UInt16
                Throw InvalidDataTypeCode(TypeCode.UInt16)
            Case TypeCode.UInt32
                Throw InvalidDataTypeCode(TypeCode.UInt32)
            Case TypeCode.UInt64
                Throw InvalidDataTypeCode(TypeCode.UInt64)
            Case TypeCode.Object
                sql_md = SqlMetaDataFromObjectColumn(name, column, clrType)
                If sql_md Is Nothing Then
                    ' Unknown type, try to treat it as string
                    sql_md = New SqlMetaData(name, SqlDbType.NVarChar, column.MaxLength)
                    coerceToString = True
                End If
            Case Else
                Throw UnknownDataType(clrType)
        End Select

        Return sql_md
    End Function

    Private Shared Function SqlMetaDataFromObjectColumn(ByVal name As String, ByVal column As DataColumn, ByVal clrType As Type) As SqlMetaData
        Dim sql_md As SqlMetaData = Nothing

        If (clrType Is GetType(System.Byte()) OrElse clrType Is GetType(SqlBinary) OrElse clrType Is GetType(SqlBytes) _
            OrElse clrType Is GetType(System.Char()) OrElse clrType Is GetType(SqlString) OrElse clrType Is GetType(SqlChars)) Then
            sql_md = New SqlMetaData(name, SqlDbType.VarBinary, column.MaxLength)
        ElseIf (clrType Is GetType(System.Guid)) Then
            sql_md = New SqlMetaData(name, SqlDbType.UniqueIdentifier)
        ElseIf (clrType Is GetType(System.Object)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Variant)
        ElseIf (clrType Is GetType(SqlBoolean)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Bit)
        ElseIf (clrType Is GetType(SqlByte)) Then
            sql_md = New SqlMetaData(name, SqlDbType.TinyInt)
        ElseIf (clrType Is GetType(SqlDateTime)) Then
            sql_md = New SqlMetaData(name, SqlDbType.DateTime)
        ElseIf (clrType Is GetType(SqlDouble)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Float)
        ElseIf (clrType Is GetType(SqlGuid)) Then
            sql_md = New SqlMetaData(name, SqlDbType.UniqueIdentifier)
        ElseIf (clrType Is GetType(SqlInt16)) Then
            sql_md = New SqlMetaData(name, SqlDbType.SmallInt)
        ElseIf (clrType Is GetType(SqlInt32)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Int)
        ElseIf (clrType Is GetType(SqlInt64)) Then
            sql_md = New SqlMetaData(name, SqlDbType.BigInt)
        ElseIf (clrType Is GetType(SqlMoney)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Money)
        ElseIf (clrType Is GetType(SqlDecimal)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Decimal, SqlDecimal.MaxPrecision, 0)
        ElseIf (clrType Is GetType(SqlSingle)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Real)
        ElseIf (clrType Is GetType(SqlXml)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Xml)
        Else
            sql_md = Nothing
        End If

        Return sql_md
    End Function
End Class

Public Class TestSendDataSet
    Private Const TestConnectionString As String = "context connection=true"
    Private Const prod1ID As Integer = 750  'Product ID of Road-150 Red, 44 bicycle
    Private Const prod2ID As Integer = 751  'Product ID of Road-150 Red, 48 bicycle

    ''' <summary>
    ''' Invoke a stored procedure to get some bill of material information and 
    ''' fill a data set with the two result sets.  Return the data set to the client.

    <SqlProcedure(Name:="usp_TestSendDataSet")> _
    Public Shared Sub DoTest()
        Dim conn As New SqlConnection(TestConnectionString)
        Try
            Dim cmd As SqlCommand = conn.CreateCommand()
            cmd.CommandText = "usp_GetTwoBOMTestData"
            cmd.CommandType = CommandType.StoredProcedure

            Dim prod1Param As New SqlParameter("@ProductID1", SqlDbType.Int)
            prod1Param.Value = prod1ID
            cmd.Parameters.Add(prod1Param)

            Dim prod2Param As New SqlParameter("@ProductID2", SqlDbType.Int)
            prod2Param.Value = prod2ID
            cmd.Parameters.Add(prod2Param)

            Dim asOfDateParam As New SqlParameter("@AsOfDate", SqlDbType.DateTime)
            asOfDateParam.Value = DateTime.Now
            cmd.Parameters.Add(asOfDateParam)

            Dim ds As New DataSet("TestData")
            Dim sda As New SqlDataAdapter(cmd)
            conn.Open()
            sda.Fill(ds)

            ' Normally, after filling the data set, rather than immediately returning it, 
            ' the data would be modified before invoking SendDataSet to deliver 
            ' the data within the data set as a result set to the client.  For simplicity 
            ' this sample simply returns the data.
            DataSetUtilities.SendDataSet(ds)
        Finally
            conn.Dispose()
        End Try
    End Sub
End Class

Imports Microsoft.VisualBasic
Imports System
Imports System.Collections
Imports System.Data
Imports System.Diagnostics
Imports System.Collections.Generic
Imports System.Text
Imports System.Data.SqlClient
Imports System.Data.SqlTypes
Imports Microsoft.SqlServer.Server
Imports System.Runtime.InteropServices

Public Class DataSetUtilities

    Public Shared Sub SendDataSet(ByVal ds As DataSet)
        If ds Is Nothing Then
            Throw New ArgumentException("SendDataSet requires a non-null data set.")
        Else
            For Each dt As DataTable In ds.Tables
                SendDataTable(dt)
            Next
        End If
    End Sub

    Public Shared Sub SendDataTable(ByVal dt As DataTable)
        Dim coerceToString() As Boolean = Nothing ' Do we need to coerce this column to string?
        Dim metaData As SqlMetaData() = ExtractDataTableColumnMetaData(dt, coerceToString)

        Dim record As New SqlDataRecord(metaData)
        Dim pipe As SqlPipe = SqlContext.Pipe
        pipe.SendResultsStart(record)

        Try
            For Each row As DataRow In dt.Rows
                For index As Integer = 0 To record.FieldCount - 1
                    Dim value As Object = row(index)
                    If Nothing Is value AndAlso coerceToString(index) Then
                        value = value.ToString()
                    End If

                    record.SetValue(index, value)
                Next

                pipe.SendResultsRow(record)
            Next
        Finally
            pipe.SendResultsEnd()
        End Try
    End Sub

    Private Shared Function ExtractDataTableColumnMetaData(ByVal dt As DataTable, <Out()> ByRef coerceToString() As Boolean) As SqlMetaData()
        Dim metaDataResult(dt.Columns.Count - 1) As SqlMetaData
        coerceToString = New Boolean(dt.Columns.Count - 1) {}
        For index As Integer = 0 To dt.Columns.Count - 1
            Dim column As DataColumn = dt.Columns(index)
            metaDataResult(index) = SqlMetaDataFromColumn(column, coerceToString(index))
        Next

        Return metaDataResult
    End Function
    Private Shared Function InvalidDataTypeCode(ByVal code As TypeCode) As Exception
        Return New ArgumentException("Invalid type: " & code.ToString())
    End Function

    Private Shared Function UnknownDataType(ByVal clrType As Type) As Exception
        Return New ArgumentException("Unknown type: " & clrType.ToString())
    End Function

    Private Shared Function SqlMetaDataFromColumn(ByVal column As DataColumn, ByRef coerceToString As Boolean) As SqlMetaData
        coerceToString = False
        Dim sql_md As SqlMetaData = Nothing
        Dim clrType As Type = column.DataType
        Dim name As String = column.ColumnName
        Select Case Type.GetTypeCode(clrType)
            Case TypeCode.Boolean
                sql_md = New SqlMetaData(name, SqlDbType.Bit)
            Case TypeCode.Byte
                sql_md = New SqlMetaData(name, SqlDbType.TinyInt)
            Case TypeCode.Char
                sql_md = New SqlMetaData(name, SqlDbType.NVarChar, 1)
            Case TypeCode.DateTime
                sql_md = New SqlMetaData(name, SqlDbType.DateTime)
            Case TypeCode.DBNull
                Throw InvalidDataTypeCode(TypeCode.DBNull)
            Case TypeCode.Decimal
                sql_md = New SqlMetaData(name, SqlDbType.Decimal)
            Case TypeCode.Double
                sql_md = New SqlMetaData(name, SqlDbType.Float)
            Case TypeCode.Empty
                Throw InvalidDataTypeCode(TypeCode.Empty)
            Case TypeCode.Int16
                sql_md = New SqlMetaData(name, SqlDbType.SmallInt)
            Case TypeCode.Int32
                sql_md = New SqlMetaData(name, SqlDbType.Int)
            Case TypeCode.Int64
                sql_md = New SqlMetaData(name, SqlDbType.BigInt)
            Case TypeCode.SByte
                Throw InvalidDataTypeCode(TypeCode.SByte)
            Case TypeCode.Single
                sql_md = New SqlMetaData(name, SqlDbType.Real)
            Case TypeCode.String
                sql_md = New SqlMetaData(name, SqlDbType.NVarChar, column.MaxLength)
            Case TypeCode.UInt16
                Throw InvalidDataTypeCode(TypeCode.UInt16)
            Case TypeCode.UInt32
                Throw InvalidDataTypeCode(TypeCode.UInt32)
            Case TypeCode.UInt64
                Throw InvalidDataTypeCode(TypeCode.UInt64)
            Case TypeCode.Object
                sql_md = SqlMetaDataFromObjectColumn(name, column, clrType)
                If sql_md Is Nothing Then
                    ' Unknown type, try to treat it as string
                    sql_md = New SqlMetaData(name, SqlDbType.NVarChar, column.MaxLength)
                    coerceToString = True
                End If
            Case Else
                Throw UnknownDataType(clrType)
        End Select

        Return sql_md
    End Function

    Private Shared Function SqlMetaDataFromObjectColumn(ByVal name As String, ByVal column As DataColumn, ByVal clrType As Type) As SqlMetaData
        Dim sql_md As SqlMetaData = Nothing

        If (clrType Is GetType(System.Byte()) OrElse clrType Is GetType(SqlBinary) OrElse clrType Is GetType(SqlBytes) _
            OrElse clrType Is GetType(System.Char()) OrElse clrType Is GetType(SqlString) OrElse clrType Is GetType(SqlChars)) Then
            sql_md = New SqlMetaData(name, SqlDbType.VarBinary, column.MaxLength)
        ElseIf (clrType Is GetType(System.Guid)) Then
            sql_md = New SqlMetaData(name, SqlDbType.UniqueIdentifier)
        ElseIf (clrType Is GetType(System.Object)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Variant)
        ElseIf (clrType Is GetType(SqlBoolean)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Bit)
        ElseIf (clrType Is GetType(SqlByte)) Then
            sql_md = New SqlMetaData(name, SqlDbType.TinyInt)
        ElseIf (clrType Is GetType(SqlDateTime)) Then
            sql_md = New SqlMetaData(name, SqlDbType.DateTime)
        ElseIf (clrType Is GetType(SqlDouble)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Float)
        ElseIf (clrType Is GetType(SqlGuid)) Then
            sql_md = New SqlMetaData(name, SqlDbType.UniqueIdentifier)
        ElseIf (clrType Is GetType(SqlInt16)) Then
            sql_md = New SqlMetaData(name, SqlDbType.SmallInt)
        ElseIf (clrType Is GetType(SqlInt32)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Int)
        ElseIf (clrType Is GetType(SqlInt64)) Then
            sql_md = New SqlMetaData(name, SqlDbType.BigInt)
        ElseIf (clrType Is GetType(SqlMoney)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Money)
        ElseIf (clrType Is GetType(SqlDecimal)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Decimal, SqlDecimal.MaxPrecision, 0)
        ElseIf (clrType Is GetType(SqlSingle)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Real)
        ElseIf (clrType Is GetType(SqlXml)) Then
            sql_md = New SqlMetaData(name, SqlDbType.Xml)
        Else
            sql_md = Nothing
        End If

        Return sql_md
    End Function
End Class

Public Class TestSendDataSet
    Private Const TestConnectionString As String = "context connection=true"
    Private Const prod1ID As Integer = 750  'Product ID of Road-150 Red, 44 bicycle
    Private Const prod2ID As Integer = 751  'Product ID of Road-150 Red, 48 bicycle

    ''' <summary>
    ''' Invoke a stored procedure to get some bill of material information and 
    ''' fill a data set with the two result sets.  Return the data set to the client.

    <SqlProcedure(Name:="usp_TestSendDataSet")> _
    Public Shared Sub DoTest()
        Dim conn As New SqlConnection(TestConnectionString)
        Try
            Dim cmd As SqlCommand = conn.CreateCommand()
            cmd.CommandText = "usp_GetTwoBOMTestData"
            cmd.CommandType = CommandType.StoredProcedure

            Dim prod1Param As New SqlParameter("@ProductID1", SqlDbType.Int)
            prod1Param.Value = prod1ID
            cmd.Parameters.Add(prod1Param)

            Dim prod2Param As New SqlParameter("@ProductID2", SqlDbType.Int)
            prod2Param.Value = prod2ID
            cmd.Parameters.Add(prod2Param)

            Dim asOfDateParam As New SqlParameter("@AsOfDate", SqlDbType.DateTime)
            asOfDateParam.Value = DateTime.Now
            cmd.Parameters.Add(asOfDateParam)

            Dim ds As New DataSet("TestData")
            Dim sda As New SqlDataAdapter(cmd)
            conn.Open()
            sda.Fill(ds)

            ' Normally, after filling the data set, rather than immediately returning it, 
            ' the data would be modified before invoking SendDataSet to deliver 
            ' the data within the data set as a result set to the client.  For simplicity 
            ' this sample simply returns the data.
            DataSetUtilities.SendDataSet(ds)
        Finally
            conn.Dispose()
        End Try
    End Sub
End Class

Bu Transact-SQLyükleme komut dosyasını (Install.sql), hangi derleme dağıtır ve saklı yordamlar oluşturur.

USE AdventureWorks;
GO

IF EXISTS (SELECT * FROM sys.procedures WHERE name = N'usp_GetTwoBOMTestData')
DROP PROCEDURE usp_GetTwoBOMTestData;
GO

IF EXISTS (SELECT * FROM sys.procedures WHERE name = N'usp_TestSendDataSet')
DROP PROCEDURE usp_TestSendDataSet;
GO

IF EXISTS (SELECT * FROM sys.assemblies WHERE name = N'SendDataSet') 
DROP ASSEMBLY SendDataSet;
GO

-- Procedure used to generate test data to fill the data set being returned to the client
CREATE PROCEDURE usp_GetTwoBOMTestData
(
@ProductID1 int,
@ProductID2 int,
@AsOfDate DateTime
)
AS
BEGIN
EXEC uspGetBillOfMaterials @ProductID1, @AsOfDate;
EXEC uspGetBillOfMaterials @ProductID2, @AsOfDate;
END;
GO


DECLARE @SamplesPath nvarchar(1024)
-- You may need to modify the value of the this variable if you have installed the sample someplace other than the default location.
Set @SamplesPath = N'C:\MySample\'

CREATE ASSEMBLY SendDataSet from @SamplesPath +'SendDataSet.dll'
WITH PERMISSION_SET = Safe;
GO

CREATE PROCEDURE usp_TestSendDataSet
AS
EXTERNAL NAME [SendDataSet].[TestSendDataSet].[DoTest];
GO

USE AdventureWorks;
GO

IF EXISTS (SELECT * FROM sys.procedures WHERE name = N'usp_GetTwoBOMTestData')
DROP PROCEDURE usp_GetTwoBOMTestData;
GO

IF EXISTS (SELECT * FROM sys.procedures WHERE name = N'usp_TestSendDataSet')
DROP PROCEDURE usp_TestSendDataSet;
GO

IF EXISTS (SELECT * FROM sys.assemblies WHERE name = N'SendDataSet') 
DROP ASSEMBLY SendDataSet;
GO

-- Procedure used to generate test data to fill the data set being returned to the client
CREATE PROCEDURE usp_GetTwoBOMTestData
(
@ProductID1 int,
@ProductID2 int,
@AsOfDate DateTime
)
AS
BEGIN
EXEC uspGetBillOfMaterials @ProductID1, @AsOfDate;
EXEC uspGetBillOfMaterials @ProductID2, @AsOfDate;
END;
GO


DECLARE @SamplesPath nvarchar(1024)
-- You may need to modify the value of the this variable if you have installed the sample someplace other than the default location.
Set @SamplesPath = N'C:\MySample\'

CREATE ASSEMBLY SendDataSet from @SamplesPath +'SendDataSet.dll'
WITH PERMISSION_SET = Safe;
GO

CREATE PROCEDURE usp_TestSendDataSet
AS
EXTERNAL NAME [SendDataSet].[TestSendDataSet].[DoTest];
GO

Bu Transact-SQLsınama komut dosyası (test.sql), hangi testleri örnek.

USE AdventureWorks
GO

EXEC usp_TestSendDataSet
GO

USE AdventureWorks
GO

EXEC usp_TestSendDataSet
GO

Aşağıdaki Transact-SQLsaklı yordamı ve derleme veritabanından kaldırır.

USE AdventureWorks
GO

IF EXISTS (SELECT * FROM sys.procedures WHERE name = N'usp_GetTwoBOMTestData')
DROP PROCEDURE usp_GetTwoBOMTestData;
GO

IF EXISTS (SELECT * FROM sys.procedures WHERE name = N'usp_TestSendDataSet')
DROP PROCEDURE usp_TestSendDataSet;
GO

IF EXISTS (SELECT * FROM sys.assemblies WHERE name = N'SendDataSet') 
DROP ASSEMBLY SendDataSet;
GO

USE AdventureWorks
GO

IF EXISTS (SELECT * FROM sys.procedures WHERE name = N'usp_GetTwoBOMTestData')
DROP PROCEDURE usp_GetTwoBOMTestData;
GO

IF EXISTS (SELECT * FROM sys.procedures WHERE name = N'usp_TestSendDataSet')
DROP PROCEDURE usp_TestSendDataSet;
GO

IF EXISTS (SELECT * FROM sys.assemblies WHERE name = N'SendDataSet') 
DROP ASSEMBLY SendDataSet;
GO

Ayrıca bkz.

Kavramlar

Kullanım senaryoları ve ortak dil çalışma zamanı (clr) tümleştirme örnekleri

Aracılığıyla paylaş