StateChangeEventArgs Class
.NET Framework 3.0
Provides data for the state change event of a .NET Framework data provider.
Namespace: System.Data
Assembly: System.Data (in system.data.dll)
Assembly: System.Data (in system.data.dll)
The data is used by the StateChange property of the OleDbConnection and the StateChange property of the SqlConnection.
The following example shows how to use the StateChange event within the SqlConnection class.
' Handler for the OnStateChange event. Private Sub OnStateChange(ByVal sender As Object, _ ByVal e As StateChangeEventArgs) PrintEventArgs(e) End Sub Sub Main() FillDataSet() End Sub Private Sub FillDataSet() Dim connectionString As String = GetConnectionString() Dim queryString As String = _ "SELECT ProductID, UnitPrice from dbo.Products;" ' Create a DataAdapter. Using dataAdapter As New SqlDataAdapter( _ queryString, connectionString) ' Add the handlers. AddHandler dataAdapter.SelectCommand.Connection.StateChange, _ AddressOf OnStateChange ' Create a DataSet. Dim dataSet As New DataSet() ' Fill the DataSet, which fires several StateChange events. dataAdapter.Fill(dataSet, 0, 5, "Table") End Using End Sub Private Sub PrintEventArgs(ByVal args As StateChangeEventArgs) Console.WriteLine("StateChangeEventArgs") Console.WriteLine(" OriginalState= {0} CurrentState= {1}", _ args.OriginalState, args.CurrentState) End Sub Private Function GetConnectionString() As String ' To avoid storing the connection string in your code, ' you can retrieve it from a configuration file. Return "Data Source=(local);Initial Catalog=Northwind;" _ & "Integrated Security=true;" End Function
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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