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Philipp Mehrwald
390
ColumnMove doesn't fire in Composit Control
posted

Hi!

I made a composite control with a WebGrid inside.
I registered some events in the "CreateChildControls()"-method:
    AddHandler grid.UpdateCell, AddressOf grid_UpdateCell
    AddHandler grid.ColumnMove, AddressOf grid_colMoved
    AddHandler grid.XmlHTTPRequest, AddressOf grid_XmlHTTPRequest
    AddHandler grid.InitializeDataSource, AddressOf grid_InitializeDataSource

And I activated the columnMoving:
    grid.DisplayLayout.AllowColumnMovingDefault = Infragistics.WebUI.UltraWebGrid.AllowColumnMoving.OnServer
    grid.DisplayLayout.AllowUpdateDefault = Infragistics.WebUI.UltraWebGrid.AllowUpdate.Yes

The "CreateChildControls()" - method is called in the OnInit method:

    Protected Overrides Sub OnInit(ByVal e As EventArgs)
        Page.RegisterRequiresControlState(Me)
        CreateChildControls()
        MyBase.OnInit(e)
    End Sub

My problem is, that only the "grid_InitializeDataSource" - event is fired when I move columns or when I update a cell. I think the initialization of the grid is correct because both times, a postback is performed.

Any suggestions?

Regards, Philipp 

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  • 390
    posted

    I found the solution: the event isn't fired because when it should be fired, the column does not exist. I think that's a bug in the Grid, because the workaround looks like this (in order of the fired events):

    createChildControls - method:
         initialize the grid...

    initializeDataSource - event:
         add Columns to the Grid

    columnMoved - event:
         code for the moved column

    prerender - event:
         bind the datasource to the grid

    As we see, we have two events for fetching the same data from the database.

    Regards, Philipp

    ----------------------------------------------------------- 

    Edit: it's not the same data,I have to build a part of the grid in the first (now wrong) way that the event is fired, and afterwards, I have to create it in the rigth way.

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