SqlDataAdapter.SelectCommand Propriedade

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

Valor da propriedade

Um SqlCommand usado durante o Fill(DataSet) para selecionar registros do banco de dados para posicionamento no DataSet.

Exemplos

O exemplo a seguir cria um SqlDataAdapter e define as SelectCommandpropriedades , InsertCommand, UpdateCommande DeleteCommand . Ele pressupõe que você já tenha criado um SqlConnection objeto .

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;
    }
}

Comentários

Quando SelectCommand é atribuído a um criado SqlCommandanteriormente, o SqlCommand não é clonado. O SelectCommand mantém uma referência ao objeto criado SqlCommand anteriormente.

Se o SelectCommand não retornar nenhuma linha, nenhuma tabela será adicionada ao DataSete nenhuma exceção será gerada.

Aplica-se a