SqlCommand.Parameters 屬性

定義

命名空間:
System.Data.SqlClient
組件:
System.Data.dll

取得 SqlParameterCollection。

public:
 property System::Data::SqlClient::SqlParameterCollection ^ Parameters { System::Data::SqlClient::SqlParameterCollection ^ get(); };
[System.Data.DataSysDescription("DbCommand_Parameters")]
public System.Data.SqlClient.SqlParameterCollection Parameters { get; }
public System.Data.SqlClient.SqlParameterCollection Parameters { get; }
[<System.Data.DataSysDescription("DbCommand_Parameters")>]
member this.Parameters : System.Data.SqlClient.SqlParameterCollection
member this.Parameters : System.Data.SqlClient.SqlParameterCollection
Public ReadOnly Property Parameters As SqlParameterCollection

屬性值

SqlParameterCollection

Transact-SQL 語句或儲存程序的參數。 預設是空集合。

屬性
DataSysDescriptionAttribute

範例

以下範例示範如何建立 並SqlCommand向 加入參數。SqlParameterCollection

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);
        }
    }
}

Private Sub UpdateDemographics(ByVal customerID As Integer, _
    ByVal demoXml As String, _
    ByVal connectionString As String)

    ' Update the demographics for a store, which is stored 
    ' in an xml column.
    Dim commandText As String = _
     "UPDATE Sales.Store SET Demographics = @demographics " _
     & "WHERE CustomerID = @ID;"

    Using connection As New SqlConnection(connectionString)
        Dim command As New SqlCommand(commandText, connection)

        ' Add CustomerID parameter for WHERE clause.
        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()
            Dim rowsAffected As Integer = command.ExecuteNonQuery()
            Console.WriteLine("RowsAffected: {0}", rowsAffected)

        Catch ex As Exception
            Console.WriteLine(ex.Message)
        End Try
    End Using
End Sub

備註

Microsoft .NET Framework for SQL Server Data Provider 不支援用來傳入參數給 SQL 語句或由 CommandType.Text 指令呼叫的儲存程序的問號（？）佔位符。 此時必須使用命名參數。 例如：

選擇 * 從客戶中 其中 CustomerID = @CustomerID

Note

若集合中的參數與要執行查詢的需求不符，可能會發生錯誤。

欲了解更多資訊，請參閱 「參數與參數資料型態的配置」。

適用於

另請參閱