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RadGrid Double Click needed to fire VB code behind
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This is a migrated thread and some comments may be shown as answers.
Mark Ogier
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Mark Ogier asked on 02 Oct 2012, 07:27 PM
Hi
I am a newbie so please excuse if this is too easy!

I am using a RadGrid and want to catch a double click on a row and then process a VB code routine I have to setup some data values, update a table and pass control over to another page to display a report. All the code in the VB is fine and works if I just press a button and catch the click. I just need the grid double click to do the same.

I have trawled the forums for hours and tried various code snippets from different posts but none of them seem to work. What I have is this

ASPX
<script type="text/javascript">
    function RowDoubleClick(index) {
        __doPostBack("<%= grdDashboards.UniqueId %>", "RowDblClicked:" + this.Rows[index].ItemIndex);
    }
    </script>


Also in the ASPX are a couple of Grid client settings
<telerik:RadGrid ID="grdDashboards" runat="server">
   <ClientSettings EnableRowHoverStyle="true">
     <ClientEvents OnRowDblClick="RowDoubleClick"></ClientEvents>
   </ClientSettings>
 </telerik:RadGrid>


Then in the VB behind I have
Protected Overrides Sub RaisePostBackEvent(ByVal source As IPostBackEventHandler, ByVal eventArgument As String)
       MyBase.RaisePostBackEvent([source], eventArgument)
 
       If ([source] Is grdDashboards) And (eventArgument.IndexOf("RowDblClicked") <> -1) Then
           Dim item As GridDataItem = grdDashboards.Items(Integer.Parse(eventArgument.Split(":"c)(1)))
 
           Response.Write([String].Format("ReportID:{0}", item.GetDataKeyValue("ReportID")))
 
       End If
   End Sub

This never seems to get called as a breakpoint nevers gets processed.

Where my test VB  code above has the Response.Write debug output I just want to call my Sub that does all the work of passing on to the next page.

All the code has been copy/pasted from examples in here.

Problem is, double clicking on the RadGrid (grdDashboards) has no effect. Nothing is firing off.

Any help much appreciated as a deadline is looming!!

Just to be clear, I am using VS2010, Framework 4, VB.NET code behind with the following Imports at the head of the VB page

Imports System.Data
Imports System.Data.SqlClient
Imports Telerik.Web.UI

Many thanks
Mark

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Tsvetina
Telerik team
answered on 03 Oct 2012, 11:42 AM
Hello Mark,

I am pasting my reply for the support ticket you has opened, in case anyone else is interested in such scenario.

The easiest way to trap a double click on the server is to fire a custom command from the client. There you can pass the item ID and use it inside the ItemCommand server event:

javascript:

function raiseServerCommand(sender, args) {
    var index = args.get_itemIndexHierarchical();
    sender.get_masterTableView().fireCommand("Custom", index);
}

VB:
Protected Sub RadGrid1_ItemCommand(ByVal sender As Object, ByVal e As GridCommandEventArgs) Handles RadGrid1.ItemCommand
    If e.CommandName = "Custom" Then
        Response.Write("Item index is " + e.CommandArgument)
    End If
End Sub

I am also attaching a small sample where this is implemented. Give it a try and let us know should you have further questions on this scenario.

Greetings,
Tsvetina
the Telerik team
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Mark
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answered on 31 May 2013, 02:18 AM
I finally found this thread which I thought would answer my question: how do I get a double click event in a radgrid.

I downloaded the zip file only to find there was no double click event in the example and no event in the code behind.

I believe an example for this should be provided with the control documentation. We should not have to scour google to find these examples.

Please help.

Here is what I have tried (based on the example):

 <telerik:RadScriptBlock ID="RadScriptBlock1" runat="server">
        <script type="text/javascript">
            function raiseServerCommand(sender, args) {
                var index = args.get_itemIndexHierarchical();
                sender.get_masterTableView().fireCommand("RowDblClick", index);
            }
        </script>
    </telerik:RadScriptBlock>

 <ClientSettings ClientEvents-OnRowDblClick="RowDblClick">
                            <Selecting AllowRowSelect="True" />
                            <Scrolling AllowScroll="True" UseStaticHeaders="True" />
                        </ClientSettings>


    Protected Sub rgOrders_ItemCommand(ByVal sender As Object, ByVal e As GridCommandEventArgs) Handles rgOrders.ItemCommand
        If e.CommandName = "RowDblClick" Then
            Response.Write("Item index is " + e.CommandArgument)
        End If
    End Sub
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Princy
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answered on 31 May 2013, 04:19 AM
Hi Mark

Please try this code,its an example of row double click event.

ASPX:
<telerik:RadGrid ID="RadGrid1" runat="server" AllowPaging="True" DataSourceID="SqlDataSource1"
           PageSize="10" AutoGenerateColumns="False" AllowSorting="True" OnItemCommand="RadGrid1_ItemCommand">
           <ClientSettings ClientEvents-OnRowDblClick="RowDblClick">
               <Selecting AllowRowSelect="True" />
               <Scrolling AllowScroll="True" UseStaticHeaders="True" />
           </ClientSettings>
           <MasterTableView AutoGenerateColumns="false" Visible="True">
               <Columns>
                   <telerik:GridBoundColumn DataField="OrderID" HeaderText="OrderID" UniqueName="OrderID">
                   </telerik:GridBoundColumn>
                   <telerik:GridBoundColumn DataField="OrderDate" HeaderText="OrderDate" UniqueName="OrderDate">
                   </telerik:GridBoundColumn>
               </Columns>
           </MasterTableView>
       </telerik:RadGrid>

JAVASCRIPT:
<script type="text/javascript">
    var editedRow;
    function RowDblClick(sender, eventArgs)
{
 editedRow = eventArgs.get_itemIndexHierarchical();
 $find("<%= RadGrid1.ClientID %>").get_masterTableView().editItem(editedRow);
 alert(editedRow);
}
</script>

Thanks,
Princy
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Mark
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answered on 31 May 2013, 05:21 AM
Thanks for the prompt reply.

I was able to make your code work (needed to add spaces between var and editedrow and function and RowDblClick)

However, I still don't understand how I can use this in code behind (see below). Double-clicking does open the alert window. After closing the alert window the radgrid goes into edit mode.

The radgrid rgOrders is a list of orders. The user can select the row and close out the order. I want them to be able to double click the row, use the order number (datakey) to open a new window with all of the order information that the user can edit. Since the order has a master detail relationship between lines, it must be a new window. And, the user might open several orders from the list at the same time.

Here is the code that I was using to test. I though it would execute after a double click. But,  e.CommandName is never equal to RowDblClick

Protected Sub rgOrders_ItemCommand(ByVal sender As Object, ByVal e As GridCommandEventArgs) Handles rgOrders.ItemCommand
        If e.CommandName = "RowDblClick" Then
            Response.Write("Item index is " + e.CommandArgument)
        End If
End Sub

Here's the rest of my code:

<telerik:RadScriptBlock ID="RadScriptBlock1" runat="server">
       <script type="text/javascript">
           var editedRow;
           function RowDblClick(sender, eventArgs)
           {
               editedRow = eventArgs.get_itemIndexHierarchical();
               $find("<%= rgOrders.ClientID%>").get_masterTableView().editItem(editedRow);
              alert(editedRow);
          }
       </script>
   </telerik:RadScriptBlock>

<MasterTableView DataKeyNames="order_key" DataSourceID="dsrgOrders" CommandItemDisplay="Top"
CommandItemSettings-ShowExportToExcelButton="True"
CommandItemSettings-ShowExportToCsvButton="True">
<CommandItemSettings ExportToPdfText="Export to PDF" ShowAddNewRecordButton="false">
</CommandItemSettings>
<RowIndicatorColumn Visible="False" FilterControlAltText="Filter RowIndicator column">
<HeaderStyle Width="20px"></HeaderStyle>
</RowIndicatorColumn>
<ExpandCollapseColumn Visible="True" FilterControlAltText="Filter ExpandColumn column">
<HeaderStyle Width="20px"></HeaderStyle>
</ExpandCollapseColumn>
<Columns>
<telerik:GridClientSelectColumn FilterControlAltText="Filter SelectOrder column"
UniqueName="SelectOrder">
</telerik:GridClientSelectColumn>
<telerik:GridBoundColumn DataField="order_key" DataType="System.Int64"
FilterControlAltText="Filter order_key column" HeaderText="order_key"
ReadOnly="True" SortExpression="order_key" UniqueName="Order">
</telerik:GridBoundColumn>
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Princy
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answered on 03 Jun 2013, 07:24 AM
Hi Mark,

Please try this code snippet.I have edited it.
ASPX:
<telerik:RadGrid ID="RadGrid1" runat="server" AllowPaging="True" DataSourceID="SqlDataSource1"
           PageSize="10" AutoGenerateColumns="False" AllowSorting="True" OnItemCommand="RadGrid1_ItemCommand">
         <ClientSettings ClientEvents-OnRowDblClick="RowDblClick">
               <Selecting AllowRowSelect="True" />
               <Scrolling AllowScroll="True" UseStaticHeaders="True" />
         </ClientSettings>
         <MasterTableView AutoGenerateColumns="false" Visible="True">
              <Columns>
                   <telerik:GridBoundColumn DataField="OrderID" HeaderText="OrderID" UniqueName="OrderID">
                   </telerik:GridBoundColumn>
                   <telerik:GridBoundColumn DataField="OrderDate" HeaderText="OrderDate" UniqueName="OrderDate">
                   </telerik:GridBoundColumn>
              </Columns>
         </MasterTableView>
</telerik:RadGrid>

JAVASCRIPT:
<script type="text/javascript">
    var isDoubleClick = false;
    var clickHandler = null;
    var ClickedIndex = null;
    function RowDblClick(sender, args)
     {
       ClickedIndex = args._itemIndexHierarchical;
       isDoubleClick = true;
       if (clickHandler)
      {
        window.clearTimeout(clickHandler);
        clickHandler = null;
       }
      clickHandler = window.setTimeout(ActualClick, 200);
    }
    function ActualClick()
     {
         if (isDoubleClick)
      {
         var grid = $find("<%=RadGrid1.ClientID %>");
         if (grid)
           {
             var MasterTable = grid.get_masterTableView();
             var Rows = MasterTable.get_dataItems();
             for (var i = 0; i < Rows.length; i++) {
                 var row = Rows[i];
                 if (ClickedIndex != null && ClickedIndex == i)
                  {
                     MasterTable.fireCommand("DoubleClick", ClickedIndex);
                 }
           }  
       }
   }
}
</script>

VB:
Protected Sub RadGrid1_ItemCommand(sender As Object, e As GridCommandEventArgs)
    If e.CommandName = "DoubleClick" Then
        Dim item As GridDataItem = RadGrid1.MasterTableView.Items(Convert.ToInt32(e.CommandArgument))
        Response.Write("Item index is " + e.CommandArgument)
    End If
End Sub

Thanks
Princy

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Silvio Silva Junior
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answered on 29 Mar 2014, 10:53 PM
Tsvetina, I really need to thank you!

Your solution works like a charm for me.

Thanks again!

function raiseServerCommand(sender, args) {    
var index = args.get_itemIndexHierarchical();    
sender.get_masterTableView().fireCommand("Custom", index);
}

Best regards.
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Mark Ogier
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Tsvetina
Telerik team
Mark
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Princy
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Silvio Silva Junior
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