DbDataAdapter.SelectCommand 属性

定义

命名空间:

System.Data.Common

程序集:

System.Data.Common.dll

Source:

DbDataAdapter.cs

获取或设置用于在数据源中选择记录的命令。

public:
 property System::Data::Common::DbCommand ^ SelectCommand { System::Data::Common::DbCommand ^ get(); void set(System::Data::Common::DbCommand ^ value); };

[System.ComponentModel.Browsable(false)]
public System.Data.Common.DbCommand? SelectCommand { get; set; }

[<System.ComponentModel.Browsable(false)>]
member this.SelectCommand : System.Data.Common.DbCommand with get, set

Public Property SelectCommand As DbCommand

属性值

DbCommand

在 IDbCommand 过程中使用的 Update(DataSet)，它从数据源中选择记录以便放入数据集中。

属性

BrowsableAttribute

示例

以下示例创建派生类 OleDbDataAdapter 并设置其一些属性。

public static OleDbDataAdapter CreateCustomerAdapter(
    OleDbConnection connection)
{
    OleDbDataAdapter adapter = new OleDbDataAdapter();
    OleDbCommand command;

    // Create the SelectCommand.
    command = new OleDbCommand("SELECT * FROM Customers " +
        "WHERE Country = ? AND City = ?", connection);

    command.Parameters.Add("Country", OleDbType.VarChar, 15);
    command.Parameters.Add("City", OleDbType.VarChar, 15);

    adapter.SelectCommand = command;

    // Create the InsertCommand.
    command = new OleDbCommand(
        "INSERT INTO Customers (CustomerID, CompanyName) " +
        "VALUES (?, ?)", connection);

    command.Parameters.Add(
        "CustomerID", OleDbType.Char, 5, "CustomerID");
    command.Parameters.Add(
        "CompanyName", OleDbType.VarChar, 40, "CompanyName");

    adapter.InsertCommand = command;
    return adapter;
}

Public Shared Function CreateCustomerAdapter( _
    connection As OleDbConnection) As OleDbDataAdapter 

    Dim adapter As New OleDbDataAdapter()
    Dim command As OleDbCommand

    ' Create the SelectCommand.
    command = New OleDbCommand("SELECT * FROM Customers " & _
        "WHERE Country = ? AND City = ?", connection)

    command.Parameters.Add("Country", OleDbType.VarChar, 15)
    command.Parameters.Add("City", OleDbType.VarChar, 15)

    adapter.SelectCommand = command

    ' Create the InsertCommand.
    command = New OleDbCommand( _
        "INSERT INTO Customers (CustomerID, CompanyName) " & _
        "VALUES (?, ?)", connection)

    command.Parameters.Add( _
        "CustomerID", OleDbType.Char, 5, "CustomerID")
    command.Parameters.Add( _
        "CompanyName", OleDbType.VarChar, 40, "CompanyName")

    adapter.InsertCommand = command
    Return adapter
End Function

另请参阅

• 操作数据 (ADO.NET)
• DbProviderFactories (ADO.NET)
• ADO.NET 概述