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Grid does not automatically updated
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18/01/2004 21:40:24
 
 
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Information générale
Forum:
ASP.NET
Catégorie:
Autre
Titre:
Grid does not automatically updated
Divers
Thread ID:
00867980
Message ID:
00867980
Vues:
43
Dear The Expert,

I use C1TrueDBGrid (ComponentOne Product) Control for displaying my records, I don't know why the Grid does not automatically updated when a record being added, modified or deleted, my codes goes below:
in form load  
' Call Load Dataset to fill Grid
Me.LoadDataSet()
I use click Button2 to try to modify a record:
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim xxx As String = "Update MyTable01 Set Kode = '00001' Where Kode = '11'"
        SqlConnection1.Open()
        SqlDataAdapter1.SelectCommand.CommandText = xxx
        SqlDataAdapter1.SelectCommand.CommandType = CommandType.Text
        SqlDataAdapter1.SelectCommand.ExecuteNonQuery()
        SqlConnection1.Close()
        UpdateDataSet()
    End Sub


    Public Sub UpdateDataSet()
        Dim objDataSetChanges As WindowsApplication1.DataSet1 = New WindowsApplication1.DataSet1()
        'Stop any current edits.
        Me.BindingContext(objmyds, "MyTable01").EndCurrentEdit()
        'Get the changes that have been made to the main dataset.
        objDataSetChanges = CType(objmyds.GetChanges, WindowsApplication1.DataSet1)
        'Check to see if any changes have been made.
        If (Not (objDataSetChanges) Is Nothing) Then
            Try
                'There are changes that need to be made, so attempt to update the datasource by
                'calling the update method and passing the dataset and any parameters.
                Me.UpdateDataSource(objDataSetChanges)
                objmyds.Merge(objDataSetChanges)
                objmyds.AcceptChanges()
            Catch eUpdate As System.Exception
                'Add your error handling code here.
                Throw eUpdate
            End Try
            'Add your code to check the returned dataset for any errors that may have been
            'pushed into the row object's error.
        End If

    End Sub


    Public Sub UpdateDataSource(ByVal ChangedRows As WindowsApplication1.DataSet1)
        Try
            'The data source only needs to be updated if there are changes pending.
            If (Not (ChangedRows) Is Nothing) Then
                'Open the connection.
                Me.SqlConnection1.Open()
                'Attempt to update the data source.
                Me.SqlDataAdapter1.Update(ChangedRows)
            End If
        Catch updateException As System.Exception
            'Add your error handling code here.
            Throw updateException
        Finally
            'Close the connection whether or not the exception was thrown.
            Me.SqlConnection1.Close()
        End Try

    End Sub

    Public Sub LoadDataSet()
        'Create a new dataset to hold the records returned from the call to FillDataSet.
        'A temporary dataset is used because filling the existing dataset would
        'require the databindings to be rebound.
        Dim objDataSetTemp As WindowsApplication1.DataSet1
        objDataSetTemp = New WindowsApplication1.DataSet1()
        Try
            'Attempt to fill the temporary dataset.
            Me.FillDataSet(objDataSetTemp)
        Catch eFillDataSet As System.Exception
            'Add your error handling code here.
            Throw eFillDataSet
        End Try
        Try
            'Empty the old records from the dataset.
            objmyds.Clear()
            'Merge the records into the main dataset.
            objmyds.Merge(objDataSetTemp)
        Catch eLoadMerge As System.Exception
            'Add your error handling code here.
            Throw eLoadMerge
        End Try
    End Sub
anybody can help me? .. many thanks in advance

Regards
Winanjaya
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