OleDbDataAdapter-Konstruktor ()

Initialisiert eine neue Instanz der OleDbDataAdapter-Klasse.

Namespace: System.Data.OleDb
Assembly: System.Data (in system.data.dll)

Syntax

'Declaration
Public Sub New
'Usage
Dim instance As New OleDbDataAdapter

public OleDbDataAdapter ()

public:
OleDbDataAdapter ()

public OleDbDataAdapter ()

public function OleDbDataAdapter ()

Hinweise

Wenn Sie eine Instanz von OleDbDataAdapter erstellen, werden die folgenden Lese-/Schreibeigenschaften auf die folgenden Anfangswerte festgelegt.

Sie können den Wert jeder dieser Eigenschaften durch einen gesonderten Aufruf der betreffenden Eigenschaft ändern.

Beispiel

Im folgenden Beispiel wird ein OleDbDataAdapter erstellt, und einige seiner Eigenschaften werden festgelegt.

Public Function CreateDataAdapter( _
    ByVal connection As OleDbConnection) As OleDbDataAdapter

    Dim selectCommand As String = _
        "SELECT CustomerID, CompanyName FROM Customers"
    Dim adapter As OleDbDataAdapter = _
        New OleDbDataAdapter(selectCommand, connection)

    adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey

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

    adapter.UpdateCommand = New OleDbCommand( _
        "UPDATE Customers SET CustomerID = ?, CompanyName = ? " & _
        "WHERE CustomerID = ?")

    adapter.DeleteCommand = New OleDbCommand( _
        "DELETE FROM Customers WHERE CustomerID = ?")

    ' Create the parameters.
    adapter.InsertCommand.Parameters.Add( _
        "@CustomerID", OleDbType.Char, 5, "CustomerID")
    adapter.InsertCommand.Parameters.Add( _
        "@CompanyName", OleDbType.VarChar, 40, "CompanyName")

    adapter.UpdateCommand.Parameters.Add( _
        "@CustomerID", OleDbType.Char, 5, "CustomerID")
    adapter.UpdateCommand.Parameters.Add( _
        "@CompanyName", OleDbType.VarChar, 40, "CompanyName")
    adapter.UpdateCommand.Parameters.Add( _
        "@oldCustomerID", OleDbType.Char, 5, "CustomerID").SourceVersion = _
        DataRowVersion.Original

    adapter.DeleteCommand.Parameters.Add( _
        "@CustomerID", OleDbType.Char, 5, "CustomerID").SourceVersion = _
        DataRowVersion.Original

    Return adapter
End Function

public static OleDbDataAdapter CreateDataAdapter(
    OleDbConnection connection)
{
    string selectCommand = 
        "SELECT CustomerID, CompanyName FROM Customers";
    OleDbDataAdapter adapter = 
        new OleDbDataAdapter(selectCommand, connection);

    adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;

    // Create the Insert, Update and Delete commands.
    adapter.InsertCommand = new OleDbCommand(
        "INSERT INTO Customers (CustomerID, CompanyName) " +
        "VALUES (?, ?)");

    adapter.UpdateCommand = new OleDbCommand(
        "UPDATE Customers SET CustomerID = ?, CompanyName = ? " +
        "WHERE CustomerID = ?");

    adapter.DeleteCommand = new OleDbCommand(
        "DELETE FROM Customers WHERE CustomerID = ?");

    // Create the parameters.
    adapter.InsertCommand.Parameters.Add("@CustomerID", 
        OleDbType.Char, 5, "CustomerID");
    adapter.InsertCommand.Parameters.Add("@CompanyName", 
        OleDbType.VarChar, 40, "CompanyName");

    adapter.UpdateCommand.Parameters.Add("@CustomerID", 
        OleDbType.Char, 5, "CustomerID");
    adapter.UpdateCommand.Parameters.Add("@CompanyName", 
        OleDbType.VarChar, 40, "CompanyName");
    adapter.UpdateCommand.Parameters.Add("@oldCustomerID", 
        OleDbType.Char, 5, "CustomerID").SourceVersion = 
        DataRowVersion.Original;

    adapter.DeleteCommand.Parameters.Add("@CustomerID", 
        OleDbType.Char, 5, "CustomerID").SourceVersion = 
        DataRowVersion.Original;

    return adapter;
}

using System;
using System.Data;
using System.Data.OleDb;

class Class1
{
    static void Main()
    {
    }

    public static OleDbDataAdapter CreateDataAdapter(
        OleDbConnection connection)
    {
        string selectCommand = 
            "SELECT CustomerID, CompanyName FROM Customers";
        OleDbDataAdapter adapter = 
            new OleDbDataAdapter(selectCommand, connection);

        adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;

        // Create the Insert, Update and Delete commands.
        adapter.InsertCommand = new OleDbCommand(
            "INSERT INTO Customers (CustomerID, CompanyName) " +
            "VALUES (?, ?)");

        adapter.UpdateCommand = new OleDbCommand(
            "UPDATE Customers SET CustomerID = ?, CompanyName = ? " +
            "WHERE CustomerID = ?");

        adapter.DeleteCommand = new OleDbCommand(
            "DELETE FROM Customers WHERE CustomerID = ?");

        // Create the parameters.
        adapter.InsertCommand.Parameters.Add("@CustomerID", 
            OleDbType.Char, 5, "CustomerID");
        adapter.InsertCommand.Parameters.Add("@CompanyName", 
            OleDbType.VarChar, 40, "CompanyName");

        adapter.UpdateCommand.Parameters.Add("@CustomerID", 
            OleDbType.Char, 5, "CustomerID");
        adapter.UpdateCommand.Parameters.Add("@CompanyName", 
            OleDbType.VarChar, 40, "CompanyName");
        adapter.UpdateCommand.Parameters.Add("@oldCustomerID", 
            OleDbType.Char, 5, "CustomerID").SourceVersion = 
            DataRowVersion.Original;

        adapter.DeleteCommand.Parameters.Add("@CustomerID", 
            OleDbType.Char, 5, "CustomerID").SourceVersion = 
            DataRowVersion.Original;

        return adapter;
    }

Plattformen

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

OleDbDataAdapter-Klasse
OleDbDataAdapter-Member
System.Data.OleDb-Namespace

Weitere Ressourcen

Arbeiten mit DataAdapters
Arbeiten mit DataAdapters