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Cutting Edge: Extending the GridView Control

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net

Welcome to my100th consecutive installment of Cutting Edge. I've been writing this column since January 1998 in Microsoft Internet Developer. Looking back over the past eight years, I realize that I've touched on almost every subject in the Windows® SDK and the Microsoft® .

Dino Esposito

MSDN Magazine May 2006

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Extending GridView Control (II)


Hello, I'm trying to extend de GridView control with a Custom Server Control, I'm doing ok with extended properties but when I get to methods that need to re-apply or modifiy the DataSource I don't get any data in the grid, though the SQLDataSource actually retrieve data. Here is my MyGridView.applyFilter() method, which should filter the data but actually shows an empty GridView, but as I sayed, the DataSource has data. I try to find (FindControl) the SQLDataSource of the GridView (Me) and modifiy its paramters, then DataBind Me to apply the changes...

  Public Sub applyFilter(ByRef container As Control, ByVal param_names() As String)
    Dim final As Boolean = False
    Dim NFiltro As Integer = 1

    Dim ctlFilter As New Control

    If Not container Is Nothing Then
      Dim TheSQLDataSource As New SqlDataSource

      TheSQLDataSource = container.FindControl(Me.DataSourceID)

      If Not TheSQLDataSource Is Nothing Then

        With TheSQLDataSource
          .SelectCommand = "My_StoredProcedure"
          .SelectCommandType = SqlDataSourceCommandType.StoredProcedure

          Do While Not (final)
            ctlFilter = container.FindControl("bfiltro" & NFiltro)

            '....APPLY FILTER VALUES TO ST

Adding Dynamic Rows in ASP.NET GridView Control with TextBoxes and with Delete functionality

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