GridDragDropColumn cannot be dragged when added to a dynamically created Grid

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Declined

Last Updated: 10 Aug 2015 07:17 by ADMIN

ADMIN

Vessy

Created on: 19 Jan 2015 15:11

Category: UI for ASP.NET AJAX

Type: Bug Report

GridDragDropColumn cannot be dragged when added to a dynamically created Grid

GridDragDropColumn cannot be dragged when added to a dynamically created Grid. The issue can be reproduced with the following code:

    override protected void OnInit(EventArgs e)
    {
        RadGrid gr = new RadGrid();
        gr.ID = "testGrid";
        gr.AutoGenerateColumns = false;
        gr.NeedDataSource += gr_NeedDataSource;
        GridDragDropColumn columnDrag = new Telerik.Web.UI.GridDragDropColumn();
        columnDrag.HeaderStyle.Width = Unit.Pixel(40);
        columnDrag.HeaderText = "Drag";
        fileExplorer.Grid.Columns.Add(columnDrag);
        //gr.MasterTableView.Columns.Add(columnDrag);
        
        gr.ClientSettings.AllowRowsDragDrop = true;
        gr.ClientSettings.Selecting.AllowRowSelect = true;
        Page.Controls.Add(gr);
    }

3 comments

ADMIN

Vasil

Posted on: 10 Aug 2015 07:17

The PageInit method is defined as:
        protected internal override void OnInit(EventArgs e)
        {
            base.OnInit(e); // this will call the On_Init event if there is such attached
            if (this._theme != null)
            {
                this._theme.SetStyleSheet();
            }
            if (this._styleSheet != null)
            {
                this._styleSheet.SetStyleSheet();
            }
        }
This means that if you override OnInit, you should at least call the base OnInit at the end of your code, not at the beginning.
override protected void OnInit(EventArgs e) {
... code ...
base.OnInit(e);
}

Anders Mad.

Posted on: 08 Aug 2015 10:58

There is no difference using override OnInit vs. hooking an event handler on the page.. 

override protected void OnInit(EventArgs e) {
    base.OnInit(e);
    ... code ...
}

The request was: How to add a GridDragDropColumn to the RadFileExplorer contol.. All is fine on grid only pages..

I ended up doing this:

if (Telerik.Web.UI.FileExplorer && Telerik.Web.UI.FileExplorer.GridFileList) {
	Telerik.Web.UI.FileExplorer.GridFileList.prototype.org_onRowDataBound = Telerik.Web.UI.FileExplorer.GridFileList.prototype._onRowDataBound;
	Telerik.Web.UI.FileExplorer.GridFileList.prototype._onRowDataBound = function (grid, args) {
		this.org_onRowDataBound(grid, args);
		var tr = args.get_item("Name").get_element();
		var cellElement = tr.cells[0];
		cellElement.innerHTML = '<a id="dummy_DragDropColumnRowDragHandle" class="rgActionButton rgDragIcon rgIcon"></a>';
	}
}

ADMIN

Vasil

Posted on: 03 Apr 2015 15:41

Deleted: Improper way of adding the controls. The Init should not be overridden. But instead the Page_Init handler should be used