SelectCommand Property

OleDbDataAdapter.SelectCommand Property

 

Gets or sets an SQL statement or stored procedure used to select records in the data source.

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

Public Property SelectCommand As OleDbCommand

Property Value

Type: System.Data.OleDb.OleDbCommand

An OleDbCommand that is used during Fill to select records from data source for placement in the DataSet.

When SelectCommand is assigned to a previously created OleDbCommand, the OleDbCommand is not cloned. The SelectCommand maintains a reference to the previously created OleDbCommand object.

If the SelectCommand returns no rows, no tables are added to the DataSet, and no exception is raised.

The following example creates an OleDbDataAdapter and sets the SelectCommand and InsertCommand properties. It assumes that you have already created an OleDbConnection object.

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

    Dim adapter As OleDbDataAdapter = 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

.NET Framework
Available since 1.1
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