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Events doesn't fire when creating grid in code behind

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Covertix
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Covertix asked on 17 May 2012, 11:29 AM
Hi,

I create a Grid on server-side on button click event.
The grid has been created fine, but the mfunctionality of the grid doesn't work.

For example, I am trying to change page size, but the event isn't fired.
Here is my code:

 

 

 

protected void btnGenerate_Click(object sender, EventArgs e)

{

PopulateGrid();

}

protected void PopulateGrid()

{

GridPlaceHolder.Controls.Clear();

RadGrid GridReport = new RadGrid();

GridReport.GroupingSettings.CaseSensitive =

false;

GridReport.ID =

"GridReport";

GridReport.Skin =

"Gray";

GridReport.EnableViewState =

false;

GridReport.MasterTableView.EnableColumnsViewState =

false;

GridReport.Width =

Unit.Pixel(1413);

GridReport.Height =

Unit.Pixel(550);

GridReport.AllowPaging =

true;

GridReport.AllowSorting =

true;

GridReport.PageSize = 10;

GridReport.MasterTableView.AllowCustomPaging =

true;

GridReport.AutoGenerateColumns =

false;

GridReport.AllowFilteringByColumn =

false;

GridReport.EnableLinqExpressions =

false;

GridReport.GridLines =

GridLines.None;

GridReport.NeedDataSource +=

new GridNeedDataSourceEventHandler(this.GridReport_NeedDataSource);

GridReport.PageIndexChanged +=

new GridPageChangedEventHandler(this.GridReport_PageIndexChanged);

GridReport.PagerStyle.Mode =

GridPagerMode.NextPrevNumericAndAdvanced;

GridReport.ClientSettings.Scrolling.AllowScroll =

true;

GridReport.ClientSettings.Scrolling.UseStaticHeaders =

true;

GridReport.ClientSettings.Resizing.AllowColumnResize =

true;

GridReport.ClientSettings.Resizing.EnableRealTimeResize =

true;

GridReport.MasterTableView.AllowSorting =

true;

GridReport.MasterTableView.AllowNaturalSort =

false;

GridReport.MasterTableView.HierarchyLoadMode =

GridChildLoadMode.ServerOnDemand;

GridReport.ClientSettings.AllowExpandCollapse =

true;

GridReport.MasterTableView.TableLayout =

GridTableLayout.Fixed;

GridReport.MasterTableView.Width =

Unit.Pixel(1413);

GridReport.FilterMenu.EnableAjaxSkinRendering =

true;

GridReport.ClientSettings.AllowColumnsReorder =

false;

GridReport.ClientSettings.AllowDragToGroup =

false;

GridReport.ClientSettings.ReorderColumnsOnClient =

true;

GridReport.ClientSettings.Resizing.ResizeGridOnColumnResize =

true;

GridReport.ClientSettings.Resizing.ClipCellContentOnResize =

true;

GridReport.ClientSettings.EnableRowHoverStyle =

true;

GridReport.ClientSettings.ClientEvents.OnRowSelected =

"RowSelected";

GridReport.ClientSettings.Selecting.AllowRowSelect =

true;

 

 

LoadReport(GridReport);

GridPlaceHolder.Controls.Add(GridReport);

}


private void LoadReport(RadGrid GridReport)

{

 

 

    string reportName = "Report_Operations";

    switch (reportName )

     {

    case "Report_Operations":

     GridReport.MasterTableView.DataKeyNames =

    new string[] { "OperationID" };

     GridReport = BLL.BO.Reports.

    Operations.GenerateReportColumns(ref GridReport);

    break;
}

 

 

 

private void GridReport_NeedDataSource(object source, GridNeedDataSourceEventArgs e)

{
    //do something

    GridReport.DataSource = dt;}

 

 

void GridReport_PageIndexChanged(object source, GridPageChangedEventArgs e)

 {

            // DO SOMETHING, HERE THE BREAKPOINT NEVER HITS!
}

Thanks for your help!

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Jayesh Goyani
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answered on 17 May 2012, 12:09 PM
Hello,

Please check below forum. (in this forum also Similar issue)
http://www.telerik.com/community/forums/aspnet-ajax/grid/access-dynamic-grid-column-and-rows.aspx

Note : your condition should be
if (!string.IsNullOrEmpty(Request.Params["__EVENTTARGET"]))
        {
            if (Request.Params["__EVENTTARGET"].ToString() == "btnGenerate" || Request.Params["__EVENTTARGET"].ToString() == "GridReport")
            {
                creategrid();
            }
        }



Thanks,
Jayesh Goyani
0
Covertix
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answered on 17 May 2012, 02:03 PM
Thank you very much Jayesh.
Your response was really helpful.

I solved the issue with the PageIndexChanged event, but PageSizeChanged event still doesn't fire.
Do you have any idea why?

Thanks.
0
Jayesh Goyani
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answered on 18 May 2012, 06:31 AM
Hello,

Please check after pagging changes are able to fired item_command event or not?
Note :  also  set enableviewstate is true.


Thanks,
Jayesh Goyani
0
Covertix
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answered on 20 May 2012, 08:48 AM
Hi Jayesh,

I don't use item_command event.
I use enableviewstate = false, because I got an exception when I changed it to true.

I can make the page_changed event to be fired, but e.NewPageSize still has the previous value (before the change)The same happens for me when I change page index using the numeric textbox (and not the buttons).
The event is fired, but e.NewPageIndex has the previuos value.
0
Daniel
Telerik team
answered on 24 May 2012, 09:42 AM
Hi Tzach,

I would recommend that you create your control on Page_Init. This is the most bulletproof approach in my opinion. See the attached demo.

Regards,
Daniel
the Telerik team
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Covertix
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answered on 28 May 2012, 07:51 AM
Hi Daniel,

That's what I did.
I solved the problem, and now the events get fired.

The problem now is, that inside the event GridReport_PageSizeChanged, when I try to get the new value (e.NewPageSize), the value still contains the old one (before the change).
For example, If the initial value is 10, and I change to 20, e.NewPageSize returns 10.
The same happens when the event GridReport_PageIndexChanged is fired when I change the page size from textbox and not from the buttons. (I get the old value).
Do you have any idea why?

Thanks!
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Covertix
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Answers by
Jayesh Goyani
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Covertix
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Daniel
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