SqlCommand.Parameters Properti

Definisi

Ruang nama:

System.Data.SqlClient

Rakitan:

System.Data.SqlClient.dll

Paket:

System.Data.SqlClient v4.8.6

SqlParameterCollectionMendapatkan .

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

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

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

Public ReadOnly Property Parameters As SqlParameterCollection

Nilai Properti

SqlParameterCollection

Parameter pernyataan T-SQL atau prosedur tersimpan. Defaultnya adalah koleksi kosong.

Contoh

Contoh berikut menunjukkan cara membuat SqlCommand dan menambahkan parameter ke 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

Keterangan

Penyedia Data Microsoft .NET Framework untuk SQL Server tidak mendukung tempat penampung tanda tanya (?) untuk meneruskan parameter ke Pernyataan SQL atau prosedur tersimpan CommandType.Textyang disebut oleh perintah . Dalam hal ini, parameter bernama harus digunakan. Contohnya:

SELECT * FROM Customers WHERE CustomerID = @CustomerID

Catatan

Jika parameter dalam koleksi tidak cocok dengan persyaratan kueri yang akan dijalankan, kesalahan dapat diakibatkan.

Untuk informasi selengkapnya, lihat Mengonfigurasi Parameter dan Jenis Data Parameter.

Lihat juga

• Menyambungkan dan Mengambil Data dalam ADO.NET
• Menggunakan Penyedia Data .NET Framework untuk SQL Server
• Ringkasan ADO.NET