SqlBulkCopy.WriteToServer Metode
Definisi
Penting
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Menyalin semua baris dari sumber data ke tabel tujuan yang ditentukan oleh properti DestinationTableName objek SqlBulkCopy.
Overload
| WriteToServer(DataTable, DataRowState) |
Menyalin hanya baris yang cocok dengan status baris yang disediakan dalam DataTable yang disediakan ke tabel tujuan yang ditentukan oleh properti DestinationTableName objek SqlBulkCopy. |
| WriteToServer(IDataReader) |
Menyalin semua baris dalam IDataReader yang disediakan ke tabel tujuan yang ditentukan oleh properti DestinationTableName objek SqlBulkCopy. |
| WriteToServer(DataTable) |
Menyalin semua baris dalam DataTable yang disediakan ke tabel tujuan yang ditentukan oleh properti DestinationTableName objek SqlBulkCopy. |
| WriteToServer(DbDataReader) |
Menyalin semua baris dari array DbDataReader yang disediakan ke tabel tujuan yang ditentukan oleh properti DestinationTableName objek SqlBulkCopy. |
| WriteToServer(DataRow[]) |
Menyalin semua baris dari array DataRow yang disediakan ke tabel tujuan yang ditentukan oleh properti DestinationTableName objek SqlBulkCopy. |
Keterangan
Jika beberapa kumpulan hasil aktif (MARS) dinonaktifkan, WriteToServer membuat koneksi sibuk. Jika MARS diaktifkan, Anda dapat menginterogasi panggilan ke WriteToServer dengan perintah lain dalam koneksi yang sama.
WriteToServer(DataTable, DataRowState)
Menyalin hanya baris yang cocok dengan status baris yang disediakan dalam DataTable yang disediakan ke tabel tujuan yang ditentukan oleh properti DestinationTableName objek SqlBulkCopy.
public:
void WriteToServer(System::Data::DataTable ^ table, System::Data::DataRowState rowState);public void WriteToServer (System.Data.DataTable table, System.Data.DataRowState rowState);member this.WriteToServer : System.Data.DataTable * System.Data.DataRowState -> unitPublic Sub WriteToServer (table As DataTable, rowState As DataRowState)Parameter
- rowState
- DataRowState
Nilai dari enumerasi DataRowState. Hanya baris yang cocok dengan status baris yang disalin ke tujuan.
Contoh
Aplikasi Konsol berikut menunjukkan cara memuat baris secara massal hanya dalam DataTable yang cocok dengan status tertentu. Dalam hal ini, hanya baris yang tidak berubah yang ditambahkan. Tabel tujuan adalah tabel dalam database
Dalam contoh ini, DataTable dibuat pada run time dan tiga baris ditambahkan ke dalamnya. Sebelum metode WriteToServer dijalankan, salah satu baris diedit. Metode WriteToServer dipanggil dengan argumen DataRowState.UnchangedrowState, jadi hanya dua baris yang tidak berubah yang disalin secara massal ke tujuan.
Penting
Sampel ini tidak akan berjalan kecuali Anda telah membuat tabel kerja seperti yang dijelaskan dalam Penyetelan Contoh Salin Massal. Kode ini disediakan untuk menunjukkan sintaks untuk menggunakan SqlBulkCopy saja. Jika tabel sumber dan tujuan berada dalam instans SQL Server yang sama, lebih mudah dan lebih cepat untuk menggunakan pernyataan Transact-SQL INSERT ... SELECT untuk menyalin data.
using System.Data.SqlClient;
class Program
{
static void Main()
{
string connectionString = GetConnectionString();
// Open a connection to the AdventureWorks database.
using (SqlConnection connection =
new SqlConnection(connectionString))
{
connection.Open();
// Perform an initial count on the destination table.
SqlCommand commandRowCount = new SqlCommand(
"SELECT COUNT(*) FROM " +
"dbo.BulkCopyDemoMatchingColumns;",
connection);
long countStart = System.Convert.ToInt32(
commandRowCount.ExecuteScalar());
Console.WriteLine("Starting row count = {0}", countStart);
// Create a table with some rows.
DataTable newProducts = MakeTable();
// Make a change to one of the rows in the DataTable.
DataRow row = newProducts.Rows[0];
row.BeginEdit();
row["Name"] = "AAA";
row.EndEdit();
// Create the SqlBulkCopy object.
// Note that the column positions in the source DataTable
// match the column positions in the destination table so
// there is no need to map columns.
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connection))
{
bulkCopy.DestinationTableName =
"dbo.BulkCopyDemoMatchingColumns";
try
{
// Write unchanged rows from the source to the destination.
bulkCopy.WriteToServer(newProducts, DataRowState.Unchanged);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
// Perform a final count on the destination
// table to see how many rows were added.
long countEnd = System.Convert.ToInt32(
commandRowCount.ExecuteScalar());
Console.WriteLine("Ending row count = {0}", countEnd);
Console.WriteLine("{0} rows were added.", countEnd - countStart);
Console.WriteLine("Press Enter to finish.");
Console.ReadLine();
}
}
private static DataTable MakeTable()
// Create a new DataTable named NewProducts.
{
DataTable newProducts = new DataTable("NewProducts");
// Add three column objects to the table.
DataColumn productID = new DataColumn();
productID.DataType = System.Type.GetType("System.Int32");
productID.ColumnName = "ProductID";
productID.AutoIncrement = true;
newProducts.Columns.Add(productID);
DataColumn productName = new DataColumn();
productName.DataType = System.Type.GetType("System.String");
productName.ColumnName = "Name";
newProducts.Columns.Add(productName);
DataColumn productNumber = new DataColumn();
productNumber.DataType = System.Type.GetType("System.String");
productNumber.ColumnName = "ProductNumber";
newProducts.Columns.Add(productNumber);
// Create an array for DataColumn objects.
DataColumn[] keys = new DataColumn[1];
keys[0] = productID;
newProducts.PrimaryKey = keys;
// Add some new rows to the collection.
DataRow row = newProducts.NewRow();
row["Name"] = "CC-101-WH";
row["ProductNumber"] = "Cyclocomputer - White";
newProducts.Rows.Add(row);
row = newProducts.NewRow();
row["Name"] = "CC-101-BK";
row["ProductNumber"] = "Cyclocomputer - Black";
newProducts.Rows.Add(row);
row = newProducts.NewRow();
row["Name"] = "CC-101-ST";
row["ProductNumber"] = "Cyclocomputer - Stainless";
newProducts.Rows.Add(row);
newProducts.AcceptChanges();
// Return the new DataTable.
return newProducts;
}
private static string GetConnectionString()
// To avoid storing the connection string in your code,
// you can retrieve it from a configuration file.
{
return "Data Source=(local); " +
" Integrated Security=true;" +
"Initial Catalog=AdventureWorks;";
}
}
Imports System.Data.SqlClient
Module Module1
Sub Main()
Dim connectionString As String = GetConnectionString()
' Open a connection to the AdventureWorks database.
Using connection As SqlConnection = _
New SqlConnection(connectionString)
connection.Open()
' Perform an initial count on the destination table.
Dim commandRowCount As New SqlCommand( _
"SELECT COUNT(*) FROM dbo.BulkCopyDemoMatchingColumns;", _
connection)
Dim countStart As Long = _
System.Convert.ToInt32(commandRowCount.ExecuteScalar())
Console.WriteLine("Starting row count = {0}", countStart)
' Create a table with some rows.
Dim newProducts As DataTable = MakeTable()
' Make a change to one of the rows in the DataTable.
Dim row As DataRow = newProducts.Rows(0)
row.BeginEdit()
row("Name") = "AAA"
row.EndEdit()
' Set up the bulk copy object.
' Note that the column positions in the source DataTable
' match the column positions in the destination table,
' so there is no need to map columns.
Using bulkCopy As SqlBulkCopy = _
New SqlBulkCopy(connection)
bulkCopy.DestinationTableName = "dbo.BulkCopyDemoMatchingColumns"
Try
' Write unchanged rows from the source to the destination.
bulkCopy.WriteToServer(newProducts, DataRowState.Unchanged)
Catch ex As Exception
Console.WriteLine(ex.Message)
End Try
End Using
' Perform a final count on the destination table
' to see how many rows were added.
Dim countEnd As Long = _
System.Convert.ToInt32(commandRowCount.ExecuteScalar())
Console.WriteLine("Ending row count = {0}", countEnd)
Console.WriteLine("{0} rows were added.", countEnd - countStart)
Console.WriteLine("Press Enter to finish.")
Console.ReadLine()
End Using
End Sub
Private Function MakeTable() As DataTable
' Create a new DataTable named NewProducts.
Dim newProducts As DataTable = _
New DataTable("NewProducts")
' Add three column objects to the table.
Dim productID As DataColumn = New DataColumn()
productID.DataType = System.Type.GetType("System.Int32")
productID.ColumnName = "ProductID"
productID.AutoIncrement = True
newProducts.Columns.Add(productID)
Dim productName As DataColumn = New DataColumn()
productName.DataType = System.Type.GetType("System.String")
productName.ColumnName = "Name"
newProducts.Columns.Add(productName)
Dim productNumber As DataColumn = New DataColumn()
productNumber.DataType = System.Type.GetType("System.String")
productNumber.ColumnName = "ProductNumber"
newProducts.Columns.Add(productNumber)
' Create an array for DataColumn objects.
Dim keys(0) As DataColumn
keys(0) = productID
newProducts.PrimaryKey = keys
' Add some new rows to the collection.
Dim row As DataRow
row = newProducts.NewRow()
row("Name") = "CC-101-WH"
row("ProductNumber") = "Cyclocomputer - White"
newProducts.Rows.Add(row)
row = newProducts.NewRow()
row("Name") = "CC-101-BK"
row("ProductNumber") = "Cyclocomputer - Black"
newProducts.Rows.Add(row)
row = newProducts.NewRow()
row("Name") = "CC-101-ST"
row("ProductNumber") = "Cyclocomputer - Stainless"
newProducts.Rows.Add(row)
newProducts.AcceptChanges()
' Return the new DataTable.
Return newProducts
End Function
Private Function GetConnectionString() As String
' To avoid storing the connection string in your code,
' you can retrieve it from a configuration file.
Return "Data Source=(local);" & _
"Integrated Security=true;" & _
"Initial Catalog=AdventureWorks;"
End Function
End Module
Keterangan
Hanya baris dalam DataTable yang berada dalam status yang ditunjukkan dalam argumen rowState dan belum dihapus yang disalin ke tabel tujuan.
Nota
Jika Deleted ditentukan, baris Unchanged, Added, dan Modified juga akan disalin ke server. Tidak ada pengecualian yang akan dimunculkan.
Saat operasi penyalinan massal sedang berlangsung, tujuan terkait SqlConnection sibuk melayaninya, dan tidak ada operasi lain yang dapat dilakukan pada koneksi.
Kumpulan ColumnMappings memetakan dari kolom DataTable ke tabel database tujuan.
Lihat juga
- DataRowState
- Operasi Salin Massal di SQL Server
- Gambaran Umum
ADO.NET
Berlaku untuk
WriteToServer(IDataReader)
Menyalin semua baris dalam IDataReader yang disediakan ke tabel tujuan yang ditentukan oleh properti DestinationTableName objek SqlBulkCopy.
public:
void WriteToServer(System::Data::IDataReader ^ reader);public void WriteToServer (System.Data.IDataReader reader);member this.WriteToServer : System.Data.IDataReader -> unitPublic Sub WriteToServer (reader As IDataReader)Parameter
- reader
- IDataReader
IDataReader yang barisnya akan disalin ke tabel tujuan.
Contoh
Aplikasi konsol berikut menunjukkan cara memuat data secara massal dari SqlDataReader. Tabel tujuan adalah tabel dalam database
Penting
Sampel ini tidak akan berjalan kecuali Anda telah membuat tabel kerja seperti yang dijelaskan dalam Penyetelan Contoh Salin Massal. Kode ini disediakan untuk menunjukkan sintaks untuk menggunakan SqlBulkCopy saja. Jika tabel sumber dan tujuan berada dalam instans SQL Server yang sama, lebih mudah dan lebih cepat untuk menggunakan pernyataan Transact-SQL INSERT ... SELECT untuk menyalin data.
using System.Data.SqlClient;
class Program
{
static void Main()
{
string connectionString = GetConnectionString();
// Open a sourceConnection to the AdventureWorks database.
using (SqlConnection sourceConnection =
new SqlConnection(connectionString))
{
sourceConnection.Open();
// Perform an initial count on the destination table.
SqlCommand commandRowCount = new SqlCommand(
"SELECT COUNT(*) FROM " +
"dbo.BulkCopyDemoMatchingColumns;",
sourceConnection);
long countStart = System.Convert.ToInt32(
commandRowCount.ExecuteScalar());
Console.WriteLine("Starting row count = {0}", countStart);
// Get data from the source table as a SqlDataReader.
SqlCommand commandSourceData = new SqlCommand(
"SELECT ProductID, Name, " +
"ProductNumber " +
"FROM Production.Product;", sourceConnection);
SqlDataReader reader =
commandSourceData.ExecuteReader();
// Set up the bulk copy object using a connection string.
// In the real world you would not use SqlBulkCopy to move
// data from one table to the other in the same database.
using (SqlBulkCopy bulkCopy =
new SqlBulkCopy(connectionString))
{
bulkCopy.DestinationTableName =
"dbo.BulkCopyDemoMatchingColumns";
try
{
// Write from the source to the destination.
bulkCopy.WriteToServer(reader);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
finally
{
// Close the SqlDataReader. The SqlBulkCopy
// object is automatically closed at the end
// of the using block.
reader.Close();
}
}
// Perform a final count on the destination
// table to see how many rows were added.
long countEnd = System.Convert.ToInt32(
commandRowCount.ExecuteScalar());
Console.WriteLine("Ending row count = {0}", countEnd);
Console.WriteLine("{0} rows were added.", countEnd - countStart);
Console.WriteLine("Press Enter to finish.");
Console.ReadLine();
}
}
private static string GetConnectionString()
// To avoid storing the sourceConnection string in your code,
// you can retrieve it from a configuration file.
{
return "Data Source=(local); " +
" Integrated Security=true;" +
"Initial Catalog=AdventureWorks;";
}
}
Imports System.Data.SqlClient
Module Module1
Sub Main()
Dim connectionString As String = GetConnectionString()
' Open a connection to the AdventureWorks database.
Using sourceConnection As SqlConnection = _
New SqlConnection(connectionString)
sourceConnection.Open()
' Perform an initial count on the destination table.
Dim commandRowCount As New SqlCommand( _
"SELECT COUNT(*) FROM dbo.BulkCopyDemoMatchingColumns;", _
sourceConnection)
Dim countStart As Long = _
System.Convert.ToInt32(commandRowCount.ExecuteScalar())
Console.WriteLine("Starting row count = {0}", countStart)
' Get data from the source table as a SqlDataReader.
Dim commandSourceData As SqlCommand = New SqlCommand( _
"SELECT ProductID, Name, ProductNumber " & _
"FROM Production.Product;", sourceConnection)
Dim reader As SqlDataReader = commandSourceData.ExecuteReader
' Set up the bulk copy object using a connection string.
' In the real world you would not use SqlBulkCopy to move
' data from one table to the other in the same database.
Using bulkCopy As SqlBulkCopy = New SqlBulkCopy(connectionString)
bulkCopy.DestinationTableName = _
"dbo.BulkCopyDemoMatchingColumns"
Try
' Write from the source to the destination.
bulkCopy.WriteToServer(reader)
Catch ex As Exception
Console.WriteLine(ex.Message)
Finally
' Close the SqlDataReader. The SqlBulkCopy
' object is automatically closed at the end
' of the Using block.
reader.Close()
End Try
End Using
' Perform a final count on the destination table
' to see how many rows were added.
Dim countEnd As Long = _
System.Convert.ToInt32(commandRowCount.ExecuteScalar())
Console.WriteLine("Ending row count = {0}", countEnd)
Console.WriteLine("{0} rows were added.", countEnd - countStart)
Console.WriteLine("Press Enter to finish.")
Console.ReadLine()
End Using
End Sub
Private Function GetConnectionString() As String
' To avoid storing the sourceConnection string in your code,
' you can retrieve it from a configuration file.
Return "Data Source=(local);" & _
"Integrated Security=true;" & _
"Initial Catalog=AdventureWorks;"
End Function
End Module
Keterangan
Operasi salin dimulai pada baris berikutnya yang tersedia di pembaca. Sebagian besar waktu, pembaca baru saja dikembalikan oleh ExecuteReader atau panggilan serupa, sehingga baris berikutnya yang tersedia adalah baris pertama. Untuk memproses beberapa hasil, panggil NextResult pada pembaca data dan panggil WriteToServer lagi.
Perhatikan bahwa menggunakan WriteToServer memodifikasi status pembaca. Metode ini akan memanggil Read sampai mengembalikan false, operasi dibatalkan, atau terjadi kesalahan. Ini berarti bahwa pembaca data akan berada dalam status yang berbeda, mungkin di akhir kumpulan hasil, ketika operasi WriteToServer selesai.
Saat operasi penyalinan massal sedang berlangsung, tujuan terkait SqlConnection sibuk melayaninya, dan tidak ada operasi lain yang dapat dilakukan pada koneksi.
Kumpulan ColumnMappings memetakan dari kolom pembaca data ke tabel database tujuan.
Lihat juga
- Operasi Salin Massal di SQL Server
- Gambaran Umum
ADO.NET
Berlaku untuk
WriteToServer(DataTable)
Menyalin semua baris dalam DataTable yang disediakan ke tabel tujuan yang ditentukan oleh properti DestinationTableName objek SqlBulkCopy.
public:
void WriteToServer(System::Data::DataTable ^ table);public void WriteToServer (System.Data.DataTable table);member this.WriteToServer : System.Data.DataTable -> unitPublic Sub WriteToServer (table As DataTable)Parameter
Contoh
Aplikasi Konsol berikut menunjukkan cara memuat data secara massal dari DataTable. Tabel tujuan adalah tabel dalam database
Dalam contoh ini, DataTable dibuat pada waktu proses dan merupakan sumber operasi SqlBulkCopy.
Penting
Sampel ini tidak akan berjalan kecuali Anda telah membuat tabel kerja seperti yang dijelaskan dalam Penyetelan Contoh Salin Massal. Kode ini disediakan untuk menunjukkan sintaks untuk menggunakan SqlBulkCopy saja. Jika tabel sumber dan tujuan berada dalam instans SQL Server yang sama, lebih mudah dan lebih cepat untuk menggunakan pernyataan Transact-SQL INSERT ... SELECT untuk menyalin data.
using System.Data.SqlClient;
class Program
{
static void Main()
{
string connectionString = GetConnectionString();
// Open a connection to the AdventureWorks database.
using (SqlConnection connection =
new SqlConnection(connectionString))
{
connection.Open();
// Perform an initial count on the destination table.
SqlCommand commandRowCount = new SqlCommand(
"SELECT COUNT(*) FROM " +
"dbo.BulkCopyDemoMatchingColumns;",
connection);
long countStart = System.Convert.ToInt32(
commandRowCount.ExecuteScalar());
Console.WriteLine("Starting row count = {0}", countStart);
// Create a table with some rows.
DataTable newProducts = MakeTable();
// Create the SqlBulkCopy object.
// Note that the column positions in the source DataTable
// match the column positions in the destination table so
// there is no need to map columns.
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connection))
{
bulkCopy.DestinationTableName =
"dbo.BulkCopyDemoMatchingColumns";
try
{
// Write from the source to the destination.
bulkCopy.WriteToServer(newProducts);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
// Perform a final count on the destination
// table to see how many rows were added.
long countEnd = System.Convert.ToInt32(
commandRowCount.ExecuteScalar());
Console.WriteLine("Ending row count = {0}", countEnd);
Console.WriteLine("{0} rows were added.", countEnd - countStart);
Console.WriteLine("Press Enter to finish.");
Console.ReadLine();
}
}
private static DataTable MakeTable()
// Create a new DataTable named NewProducts.
{
DataTable newProducts = new DataTable("NewProducts");
// Add three column objects to the table.
DataColumn productID = new DataColumn();
productID.DataType = System.Type.GetType("System.Int32");
productID.ColumnName = "ProductID";
productID.AutoIncrement = true;
newProducts.Columns.Add(productID);
DataColumn productName = new DataColumn();
productName.DataType = System.Type.GetType("System.String");
productName.ColumnName = "Name";
newProducts.Columns.Add(productName);
DataColumn productNumber = new DataColumn();
productNumber.DataType = System.Type.GetType("System.String");
productNumber.ColumnName = "ProductNumber";
newProducts.Columns.Add(productNumber);
// Create an array for DataColumn objects.
DataColumn[] keys = new DataColumn[1];
keys[0] = productID;
newProducts.PrimaryKey = keys;
// Add some new rows to the collection.
DataRow row = newProducts.NewRow();
row["Name"] = "CC-101-WH";
row["ProductNumber"] = "Cyclocomputer - White";
newProducts.Rows.Add(row);
row = newProducts.NewRow();
row["Name"] = "CC-101-BK";
row["ProductNumber"] = "Cyclocomputer - Black";
newProducts.Rows.Add(row);
row = newProducts.NewRow();
row["Name"] = "CC-101-ST";
row["ProductNumber"] = "Cyclocomputer - Stainless";
newProducts.Rows.Add(row);
newProducts.AcceptChanges();
// Return the new DataTable.
return newProducts;
}
private static string GetConnectionString()
// To avoid storing the connection string in your code,
// you can retrieve it from a configuration file.
{
return "Data Source=(local); " +
" Integrated Security=true;" +
"Initial Catalog=AdventureWorks;";
}
}
Imports System.Data.SqlClient
Module Module1
Sub Main()
Dim connectionString As String = GetConnectionString()
' Open a connection to the AdventureWorks database.
Using connection As SqlConnection = _
New SqlConnection(connectionString)
connection.Open()
' Perform an initial count on the destination table.
Dim commandRowCount As New SqlCommand( _
"SELECT COUNT(*) FROM dbo.BulkCopyDemoMatchingColumns;", _
connection)
Dim countStart As Long = _
System.Convert.ToInt32(commandRowCount.ExecuteScalar())
Console.WriteLine("Starting row count = {0}", countStart)
' Create a table with some rows.
Dim newProducts As DataTable = MakeTable()
' Note that the column positions in the source DataTable
' match the column positions in the destination table,
' so there is no need to map columns.
Using bulkCopy As SqlBulkCopy = _
New SqlBulkCopy(connection)
bulkCopy.DestinationTableName = "dbo.BulkCopyDemoMatchingColumns"
Try
' Write from the source to the destination.
bulkCopy.WriteToServer(newProducts)
Catch ex As Exception
Console.WriteLine(ex.Message)
End Try
End Using
' Perform a final count on the destination table
' to see how many rows were added.
Dim countEnd As Long = _
System.Convert.ToInt32(commandRowCount.ExecuteScalar())
Console.WriteLine("Ending row count = {0}", countEnd)
Console.WriteLine("{0} rows were added.", countEnd - countStart)
Console.WriteLine("Press Enter to finish.")
Console.ReadLine()
End Using
End Sub
Private Function MakeTable() As DataTable
' Create a new DataTable named NewProducts.
Dim newProducts As DataTable = _
New DataTable("NewProducts")
' Add three column objects to the table.
Dim productID As DataColumn = New DataColumn()
productID.DataType = System.Type.GetType("System.Int32")
productID.ColumnName = "ProductID"
productID.AutoIncrement = True
newProducts.Columns.Add(productID)
Dim productName As DataColumn = New DataColumn()
productName.DataType = System.Type.GetType("System.String")
productName.ColumnName = "Name"
newProducts.Columns.Add(productName)
Dim productNumber As DataColumn = New DataColumn()
productNumber.DataType = System.Type.GetType("System.String")
productNumber.ColumnName = "ProductNumber"
newProducts.Columns.Add(productNumber)
' Create an array for DataColumn objects.
Dim keys(0) As DataColumn
keys(0) = productID
newProducts.PrimaryKey = keys
' Add some new rows to the collection.
Dim row As DataRow
row = newProducts.NewRow()
row("Name") = "CC-101-WH"
row("ProductNumber") = "Cyclocomputer - White"
newProducts.Rows.Add(row)
row = newProducts.NewRow()
row("Name") = "CC-101-BK"
row("ProductNumber") = "Cyclocomputer - Black"
newProducts.Rows.Add(row)
row = newProducts.NewRow()
row("Name") = "CC-101-ST"
row("ProductNumber") = "Cyclocomputer - Stainless"
newProducts.Rows.Add(row)
newProducts.AcceptChanges()
' Return the new DataTable.
Return newProducts
End Function
Private Function GetConnectionString() As String
' To avoid storing the connection string in your code,
' you can retrieve it from a configuration file.
Return "Data Source=(local);" & _
"Integrated Security=true;" & _
"Initial Catalog=AdventureWorks;"
End Function
End Module
Keterangan
Semua baris dalam DataTable disalin ke tabel tujuan kecuali baris yang telah dihapus.
Saat operasi penyalinan massal sedang berlangsung, tujuan terkait SqlConnection sibuk melayaninya, dan tidak ada operasi lain yang dapat dilakukan pada koneksi.
Kumpulan ColumnMappings memetakan dari kolom DataTable ke tabel database tujuan.
Lihat juga
- Operasi Salin Massal di SQL Server
- Gambaran Umum
ADO.NET
Berlaku untuk
WriteToServer(DbDataReader)
Menyalin semua baris dari array DbDataReader yang disediakan ke tabel tujuan yang ditentukan oleh properti DestinationTableName objek SqlBulkCopy.
public:
void WriteToServer(System::Data::Common::DbDataReader ^ reader);public void WriteToServer (System.Data.Common.DbDataReader reader);member this.WriteToServer : System.Data.Common.DbDataReader -> unitPublic Sub WriteToServer (reader As DbDataReader)Parameter
- reader
- DbDataReader
DbDataReader yang barisnya akan disalin ke tabel tujuan.
Berlaku untuk
WriteToServer(DataRow[])
Menyalin semua baris dari array DataRow yang disediakan ke tabel tujuan yang ditentukan oleh properti DestinationTableName objek SqlBulkCopy.
public:
void WriteToServer(cli::array <System::Data::DataRow ^> ^ rows);public void WriteToServer (System.Data.DataRow[] rows);member this.WriteToServer : System.Data.DataRow[] -> unitPublic Sub WriteToServer (rows As DataRow())Parameter
Contoh
Aplikasi konsol berikut menunjukkan cara memuat data secara massal dari array DataRow. Tabel tujuan adalah tabel dalam database
Dalam contoh ini, DataTable dibuat pada waktu proses. Satu baris dipilih dari DataTable untuk disalin ke tabel tujuan.
Penting
Sampel ini tidak akan berjalan kecuali Anda telah membuat tabel kerja seperti yang dijelaskan dalam Penyetelan Contoh Salin Massal. Kode ini disediakan untuk menunjukkan sintaks untuk menggunakan SqlBulkCopy saja. Jika tabel sumber dan tujuan berada dalam instans SQL Server yang sama, lebih mudah dan lebih cepat untuk menggunakan pernyataan Transact-SQL INSERT ... SELECT untuk menyalin data.
using System.Data.SqlClient;
class Program
{
static void Main()
{
string connectionString = GetConnectionString();
// Open a connection to the AdventureWorks database.
using (SqlConnection connection =
new SqlConnection(connectionString))
{
connection.Open();
// Perform an initial count on the destination table.
SqlCommand commandRowCount = new SqlCommand(
"SELECT COUNT(*) FROM " +
"dbo.BulkCopyDemoMatchingColumns;",
connection);
long countStart = System.Convert.ToInt32(
commandRowCount.ExecuteScalar());
Console.WriteLine("Starting row count = {0}", countStart);
// Create a table with some rows.
DataTable newProducts = MakeTable();
// Get a reference to a single row in the table.
DataRow[] rowArray = newProducts.Select(
"Name='CC-101-BK'");
// Create the SqlBulkCopy object.
// Note that the column positions in the source DataTable
// match the column positions in the destination table so
// there is no need to map columns.
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connection))
{
bulkCopy.DestinationTableName =
"dbo.BulkCopyDemoMatchingColumns";
try
{
// Write the array of rows to the destination.
bulkCopy.WriteToServer(rowArray);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
// Perform a final count on the destination
// table to see how many rows were added.
long countEnd = System.Convert.ToInt32(
commandRowCount.ExecuteScalar());
Console.WriteLine("Ending row count = {0}", countEnd);
Console.WriteLine("{0} rows were added.", countEnd - countStart);
Console.WriteLine("Press Enter to finish.");
Console.ReadLine();
}
}
private static DataTable MakeTable()
// Create a new DataTable named NewProducts.
{
DataTable newProducts = new DataTable("NewProducts");
// Add three column objects to the table.
DataColumn productID = new DataColumn();
productID.DataType = System.Type.GetType("System.Int32");
productID.ColumnName = "ProductID";
productID.AutoIncrement = true;
newProducts.Columns.Add(productID);
DataColumn productName = new DataColumn();
productName.DataType = System.Type.GetType("System.String");
productName.ColumnName = "Name";
newProducts.Columns.Add(productName);
DataColumn productNumber = new DataColumn();
productNumber.DataType = System.Type.GetType("System.String");
productNumber.ColumnName = "ProductNumber";
newProducts.Columns.Add(productNumber);
// Create an array for DataColumn objects.
DataColumn[] keys = new DataColumn[1];
keys[0] = productID;
newProducts.PrimaryKey = keys;
// Add some new rows to the collection.
DataRow row = newProducts.NewRow();
row["Name"] = "CC-101-WH";
row["ProductNumber"] = "Cyclocomputer - White";
newProducts.Rows.Add(row);
row = newProducts.NewRow();
row["Name"] = "CC-101-BK";
row["ProductNumber"] = "Cyclocomputer - Black";
newProducts.Rows.Add(row);
row = newProducts.NewRow();
row["Name"] = "CC-101-ST";
row["ProductNumber"] = "Cyclocomputer - Stainless";
newProducts.Rows.Add(row);
newProducts.AcceptChanges();
// Return the new DataTable.
return newProducts;
}
private static string GetConnectionString()
// To avoid storing the connection string in your code,
// you can retrieve it from a configuration file.
{
return "Data Source=(local); " +
" Integrated Security=true;" +
"Initial Catalog=AdventureWorks;";
}
}
Imports System.Data.SqlClient
Module Module1
Sub Main()
Dim connectionString As String = GetConnectionString()
' Open a connection to the AdventureWorks database.
Using connection As SqlConnection = _
New SqlConnection(connectionString)
connection.Open()
' Perform an initial count on the destination table.
Dim commandRowCount As New SqlCommand( _
"SELECT COUNT(*) FROM dbo.BulkCopyDemoMatchingColumns;", _
connection)
Dim countStart As Long = _
System.Convert.ToInt32(commandRowCount.ExecuteScalar())
Console.WriteLine("Starting row count = {0}", countStart)
' Create a table with some rows.
Dim newProducts As DataTable = MakeTable()
' Get a reference to a single row in the table.
Dim rowArray() As DataRow = newProducts.Select( _
"Name='CC-101-BK'")
' Note that the column positions in the source DataTable
' match the column positions in the destination table,
' so there is no need to map columns.
Using bulkCopy As SqlBulkCopy = _
New SqlBulkCopy(connection)
bulkCopy.DestinationTableName = "dbo.BulkCopyDemoMatchingColumns"
Try
' Write the array of rows to the destination.
bulkCopy.WriteToServer(rowArray)
Catch ex As Exception
Console.WriteLine(ex.Message)
End Try
End Using
' Perform a final count on the destination table
' to see how many rows were added.
Dim countEnd As Long = _
System.Convert.ToInt32(commandRowCount.ExecuteScalar())
Console.WriteLine("Ending row count = {0}", countEnd)
Console.WriteLine("{0} rows were added.", countEnd - countStart)
Console.WriteLine("Press Enter to finish.")
Console.ReadLine()
End Using
End Sub
Private Function MakeTable() As DataTable
' Create a new DataTable named NewProducts.
Dim newProducts As DataTable = _
New DataTable("NewProducts")
' Add three column objects to the table.
Dim productID As DataColumn = New DataColumn()
productID.DataType = System.Type.GetType("System.Int32")
productID.ColumnName = "ProductID"
productID.AutoIncrement = True
newProducts.Columns.Add(productID)
Dim productName As DataColumn = New DataColumn()
productName.DataType = System.Type.GetType("System.String")
productName.ColumnName = "Name"
newProducts.Columns.Add(productName)
Dim productNumber As DataColumn = New DataColumn()
productNumber.DataType = System.Type.GetType("System.String")
productNumber.ColumnName = "ProductNumber"
newProducts.Columns.Add(productNumber)
' Create an array for DataColumn objects.
Dim keys(0) As DataColumn
keys(0) = productID
newProducts.PrimaryKey = keys
' Add some new rows to the collection.
Dim row As DataRow
row = newProducts.NewRow()
row("Name") = "CC-101-WH"
row("ProductNumber") = "Cyclocomputer - White"
newProducts.Rows.Add(row)
row = newProducts.NewRow()
row("Name") = "CC-101-BK"
row("ProductNumber") = "Cyclocomputer - Black"
newProducts.Rows.Add(row)
row = newProducts.NewRow()
row("Name") = "CC-101-ST"
row("ProductNumber") = "Cyclocomputer - Stainless"
newProducts.Rows.Add(row)
newProducts.AcceptChanges()
' Return the new DataTable.
Return newProducts
End Function
Private Function GetConnectionString() As String
' To avoid storing the connection string in your code,
' you can retrieve it from a configuration file.
Return "Data Source=(local);" & _
"Integrated Security=true;" & _
"Initial Catalog=AdventureWorks;"
End Function
End Module
Keterangan
Saat operasi penyalinan massal sedang berlangsung, tujuan terkait SqlConnection sibuk melayaninya, dan tidak ada operasi lain yang dapat dilakukan pada koneksi.
Kumpulan ColumnMappings memetakan dari kolom DataRow ke tabel database tujuan.
Lihat juga
- Operasi Salin Massal di SQL Server
- Gambaran Umum
ADO.NET
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