SqlDataAdapter.SelectCommand 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

取得或設定用來在資料來源中選取資料錄的 Transact-SQL 陳述式或預存程序。

public:
 property Microsoft::Data::SqlClient::SqlCommand ^ SelectCommand { Microsoft::Data::SqlClient::SqlCommand ^ get(); void set(Microsoft::Data::SqlClient::SqlCommand ^ value); };

public Microsoft.Data.SqlClient.SqlCommand SelectCommand { get; set; }

member this.SelectCommand : Microsoft.Data.SqlClient.SqlCommand with get, set

Public Property SelectCommand As SqlCommand

屬性值

SqlCommand

在 SqlCommand 期間使用的 Fill(DataSet)，用來從資料庫選取要放置在 DataSet 中的資料錄。

範例

下列範例會建立 並 SqlDataAdapter 設定 SelectCommand 、 InsertCommand 、 UpdateCommand 和 DeleteCommand 屬性。 它假設您已經建立 SqlConnection 物件。

using Microsoft.Data.SqlClient;

class Program
{
    static void Main()
    {
    }
    public static SqlDataAdapter CreateCustomerAdapter(
        SqlConnection connection)
    {
        SqlDataAdapter adapter = new SqlDataAdapter();

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

        // Add the parameters for the SelectCommand.
        command.Parameters.Add("@Country", SqlDbType.NVarChar, 15);
        command.Parameters.Add("@City", SqlDbType.NVarChar, 15);

        adapter.SelectCommand = command;

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

        // Add the parameters for the InsertCommand.
        command.Parameters.Add("@CustomerID", SqlDbType.NChar, 5, "CustomerID");
        command.Parameters.Add("@CompanyName", SqlDbType.NVarChar, 40, "CompanyName");

        adapter.InsertCommand = command;

        // Create the UpdateCommand.
        command = new SqlCommand(
            "UPDATE Customers SET CustomerID = @CustomerID, CompanyName = @CompanyName " +
            "WHERE CustomerID = @oldCustomerID", connection);

        // Add the parameters for the UpdateCommand.
        command.Parameters.Add("@CustomerID", SqlDbType.NChar, 5, "CustomerID");
        command.Parameters.Add("@CompanyName", SqlDbType.NVarChar, 40, "CompanyName");
        SqlParameter parameter = command.Parameters.Add(
            "@oldCustomerID", SqlDbType.NChar, 5, "CustomerID");
        parameter.SourceVersion = DataRowVersion.Original;

        adapter.UpdateCommand = command;

        // Create the DeleteCommand.
        command = new SqlCommand(
            "DELETE FROM Customers WHERE CustomerID = @CustomerID", connection);

        // Add the parameters for the DeleteCommand.
        parameter = command.Parameters.Add(
            "@CustomerID", SqlDbType.NChar, 5, "CustomerID");
        parameter.SourceVersion = DataRowVersion.Original;

        adapter.DeleteCommand = command;

        return adapter;
    }
}

備註

當 指派給先前建立 SqlCommand 的 時 SelectCommand ， SqlCommand 不會複製 。 會 SelectCommand 維護先前建立 SqlCommand 之 物件的參考。

SelectCommand如果 未傳回任何資料列，則不會將任何資料表新增至 DataSet ，而且不會引發任何例外狀況。