Gridview freezing UI

[Stephane]

I'm using a radgridview to display search results for metadata for files. The grid has 6 columns and for any search I try, whenever I'm adding results to the grid, the whole UI is freezing until the results are added.

I've tried it with a background worker and adding the rows in the report progress event., but it still doing this.

The grid is placed on a tabpage control.

[Anton]

Hello Spiffy,

Thank you for writing.

The issue in your case appears due missing BeginUpdate and EndUpdate methods around your logic that inserts the rows into RadGridView. With this methods RadGridView suspends the updates after  each addition and performs them only once, whwn EndUpdate is called. Consider the following example:

radgridMetadata.BeginUpdate()
For inti = 0 To UBound(objRow)
    Dim rowInfo As New Telerik.WinControls.UI.GridViewDataRowInfo(Me.radgridMetadata.MasterView)
    rowInfo.Cells("colDocumentID").Value = objRow(inti).Item("Document_ID").ToString
    rowInfo.Tag = objRow(inti).Item("docType")

    If objRow(inti).Item("document_date").ToString <> "" Then
        rowInfo.Cells("colDateDocument").Value = CDate(objRow(inti).Item("Date_Document").ToString).ToShortDateString
    End If
    rowInfo.Cells("colTitle").Value = objRow(inti).Item("title").ToString
    rowInfo.Cells("colDocumentType").Value = objRow(inti).Item("document_type").ToString
    rowInfo.Cells("colHostReference").Value = objRow(inti).Item("host_reference").ToString
    rowInfo.Cells("colDescription").Value = objRow(inti).Item("description").ToString

    radgridMetadata.Rows.Add(rowInfo)
Next
radgridMetadata.EndUpdate()

I hope this helps.

Regards,
Anton
Telerik