SqlCommand.Parameters 屬性

定義

命名空間:

Microsoft.Data.SqlClient

組件:

Microsoft.Data.SqlClient.dll

套件:

Microsoft.Data.SqlClient v5.2.0

SqlParameterCollection取得 。

public:
 property Microsoft::Data::SqlClient::SqlParameterCollection ^ Parameters { Microsoft::Data::SqlClient::SqlParameterCollection ^ get(); };

public Microsoft.Data.SqlClient.SqlParameterCollection Parameters { get; }

member this.Parameters : Microsoft.Data.SqlClient.SqlParameterCollection

Public ReadOnly Property Parameters As SqlParameterCollection

屬性值

SqlParameterCollection

Transact-SQL 陳述式或預存程序的參數。 預設為空集合。

範例

下列範例示範如何建立 SqlCommand 和 將參數新增至 SqlParameterCollection 。

using System;
using System.Data;
using Microsoft.Data.SqlClient;


class Program
{
    static void Main()
    {
        string connectionString = GetConnectionString();
        string demo = @"<StoreSurvey xmlns=""http://schemas.microsoft.com/sqlserver/2004/07/adventure-works/StoreSurvey""><AnnualSales>1500000</AnnualSales><AnnualRevenue>150000</AnnualRevenue><BankName>Primary International</BankName><BusinessType>OS</BusinessType><YearOpened>1974</YearOpened><Specialty>Road</Specialty><SquareFeet>38000</SquareFeet><Brands>3</Brands><Internet>DSL</Internet><NumberEmployees>40</NumberEmployees></StoreSurvey>";
        Int32 id = 3;
        UpdateDemographics(id, demo, connectionString);
        Console.ReadLine();
    }
    private static void UpdateDemographics(Int32 customerID,
        string demoXml, string connectionString)
    {
        // Update the demographics for a store, which is stored 
        // in an xml column. 
        string commandText = "UPDATE Sales.Store SET Demographics = @demographics "
            + "WHERE CustomerID = @ID;";

        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            SqlCommand command = new SqlCommand(commandText, connection);
            command.Parameters.Add("@ID", SqlDbType.Int);
            command.Parameters["@ID"].Value = customerID;

            // Use AddWithValue to assign Demographics.
            // SQL Server will implicitly convert strings into XML.
            command.Parameters.AddWithValue("@demographics", demoXml);

            try
            {
                connection.Open();
                Int32 rowsAffected = command.ExecuteNonQuery();
                Console.WriteLine("RowsAffected: {0}", rowsAffected);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
    }

備註

Microsoft .NET Framework Data Provider for SQL Server 不支援問號 (？) 預留位置，將參數傳遞至 SQL 語句或 命令 CommandType.Text 所呼叫的預存程式。 在此情況下，必須使用具名參數。 例如：

SELECT * FROM Customers WHERE CustomerID = @CustomerID

注意

如果集合中的參數不符合要執行的查詢需求，可能會產生錯誤。

如需詳細資訊，請參閱 設定參數。