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Is there a way to change the grid image that gets dragged?

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Michael Koenig
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Michael Koenig asked on 27 Apr 2010, 10:54 PM
For example, I am dragging a row from a grid to a Scheduler control. The grid row contains about 30 columns. However, I only want to display 4 columns in the drag image that I will drop on the Scheduler control.

Thanks in advance,

Mike

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Dimo
Telerik team
answered on 28 Apr 2010, 03:46 PM
Hello Michael,

You can use a similar approach as the one described at

http://www.telerik.com/community/forums/aspnet-ajax/grid/drag-and-drop-columns-not-rows.aspx

Your case is simpler - you don't need to hide all rows and set background color, you just need to set some height to the wrapper (larger than 24px) and an overflow:hidden style to the same wrapper element.

Best wishes,
Dimo
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Michael Koenig
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answered on 05 May 2010, 02:23 PM
The example in thislink: http://www.telerik.com/community/forums/aspnet-ajax/grid/drag-and-drop-columns-not-rows.aspx works great but it's not exactly what I want to do. I just want to change the dragged image to reflect a few columns, not all of them. Do you have an example of how to do this?

Thanks,

Mike
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Dimo
Telerik team
answered on 10 May 2010, 01:43 PM
Hello Michael,

You can add a CSS class to the columns (cells actually) that you will want to hide during dragging like this:

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
  
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  
<script runat="server">
  
    protected void RadGrid_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
    {
        DataTable dt = new DataTable();
        DataRow dr;
        int colsNum = 4;
        int rowsNum = 5;
        string colName = "Column";
  
        for (int j = 1; j <= colsNum; j++)
        {
            dt.Columns.Add(String.Format("{0}{1}", colName, j));
        }
  
        for (int i = 1; i <= rowsNum; i++)
        {
            dr = dt.NewRow();
  
            for (int k = 1; k <= colsNum; k++)
            {
                dr[String.Format("{0}{1}", colName, k)] = String.Format("{0}{1} Row{2}", colName, k, i);
            }
            dt.Rows.Add(dr);
        }
  
        (sender as RadGrid).DataSource = dt;
    }
      
</script>
  
<head id="Head1" runat="server">
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
<title>RadControls for ASP.NET AJAX</title>
<telerik:RadCodeBlock ID="RadCodeBlock1" runat="server">
<style type="text/css">
  
#<%= RadGrid1.ClientID %>_DraggedRows
{
    width:500px !important;
}
 
#<%= RadGrid1.ClientID %>_DraggedRows .NoDragShow
{
    display:none;
}
  
</style>
</telerik:RadCodeBlock>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
  
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
    <AjaxSettings>
        <telerik:AjaxSetting AjaxControlID="RadGrid1">
            <UpdatedControls>
                <telerik:AjaxUpdatedControl ControlID="RadGrid1" />
            </UpdatedControls>
        </telerik:AjaxSetting>
    </AjaxSettings>
</telerik:RadAjaxManager>
  
<telerik:RadGrid
    ID="RadGrid1"
    runat="server"
    Width="800px"
    AutoGenerateColumns="false"
    OnNeedDataSource="RadGrid_NeedDataSource">
    <MasterTableView>
        <Columns>
            <telerik:GridBoundColumn DataField="Column1" HeaderText="Column 1" />
            <telerik:GridBoundColumn DataField="Column2" HeaderText="NoDragShow" ItemStyle-CssClass="NoDragShow" />
            <telerik:GridBoundColumn DataField="Column3" HeaderText="Column 3" />
            <telerik:GridBoundColumn DataField="Column4" HeaderText="Column 4" />
        </Columns>
    </MasterTableView>
    <ClientSettings AllowRowsDragDrop="true" AllowAutoScrollOnDragDrop="false">
        <Selecting AllowRowSelect="true" />
    </ClientSettings>
</telerik:RadGrid>
  
</form>
</body>
</html>


Regards,
Dimo
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Michael Koenig
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Dimo
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Michael Koenig
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