GroupFooterTemplate issue

[Yishen]

Hello all,

I have encountered a problem while using the GroupFooterTemplate in RadGrid. I have implemented a RadGrid using GroupFooterTemplate according the documentation that I have found at your web site. Here is the link to the documentation: 
Group Header and Footer Templates

In the GroupFooterTemplate, I used several <td></td> together with labels to show the footer items. I have to use GroupFooterTemplate because a checkbox must be displayed in one of the footer columns.

The issue occured, when I used Aggregate="Custom" as follows
<telerik:GridBoundColumn UniqueName="OrderNo" DataField="OrderNo" HeaderText="Order No." Aggregate="Custom" />

The error message that I got is as follows:

An entry with the same key already exists.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: An entry with the same key already exists.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 

[ArgumentException: An entry with the same key already exists.] System.Collections.Specialized.ListDictionary.Add(Object key, Object value) +6236829 Telerik.Web.UI.GridBoundColumn.PopulateAggragateInGroupFooter(TableCell cell, Object result) +142 Telerik.Web.UI.GridBoundColumn.ApplyAggregates(TableCell cell, String footerText) +2485 Telerik.Web.UI.GridBoundColumn.InitializeCell(TableCell cell, Int32 columnIndex, GridItem inItem) +637 Telerik.Web.UI.GridGroupFooterItem.Initialize(GridColumn[] columns) +262 Telerik.Web.UI.GridItem.SetupItem(Boolean dataBind, Object dataItem, GridColumn[] columns, ControlCollection rows) +964 Telerik.Web.UI.GridItemBuilder.CreateGroupFooterItem(GridGroupingContext group) +179 Telerik.Web.UI.GridItemBuilder.HandleGrouping(GridGroupingContext group, GridEnumerableBase enumerable, Boolean& isGroup, Boolean& isGroupFooter) +204 Telerik.Web.UI.GridItemBuilder.CreateItems(GridGroupingContext group) +323 Telerik.Web.UI.GridItemBuilder.CreateGroupSubItems(GridGroupingContext group, GridEnumerableBase enumerable) +783 Telerik.Web.UI.GridItemBuilder.HandleGrouping(GridGroupingContext group, GridEnumerableBase enumerable, Boolean& isGroup, Boolean& isGroupFooter) +81 Telerik.Web.UI.GridItemBuilder.CreateItems(GridGroupingContext group) +323 Telerik.Web.UI.GridTableView.CreateItems(IEnumerator enumerator, GridColumn[] columns, ControlCollection controls) +193 Telerik.Web.UI.GridTableView.CreateControlHierarchy(Boolean useDataSource) +2170 Telerik.Web.UI.GridTableView.CreateChildControls(IEnumerable dataSource, Boolean useDataSource) +832 System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding(IEnumerable data) +66 System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) +128 System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +33 System.Web.UI.WebControls.DataBoundControl.PerformSelect() +143 Telerik.Web.UI.GridTableView.PerformSelect() +38 System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +74 Telerik.Web.UI.GridTableView.DataBind() +369 Telerik.Web.UI.RadGrid.DataBind() +173 Telerik.Web.UI.RadGrid.AutoDataBind(GridRebindReason rebindReason) +4085 Telerik.Web.UI.RadGrid.OnLoad(EventArgs e) +183 System.Web.UI.Control.LoadRecursive() +74 System.Web.UI.Control.LoadRecursive() +146 System.Web.UI.Control.LoadRecursive() +146 System.Web.UI.Control.LoadRecursive() +146 System.Web.UI.Control.LoadRecursive() +146 System.Web.UI.Control.LoadRecursive() +146 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2207

If I used Aggregate="Sum" or Aggregate="Count" instead of Aggregate="Custom" , the web application could run without error. Could you please tell me how to use aggregate custom correctly while using the GroupFooterTemplate?

Many thanks in advance!



Greetings,
Y. Lueg

[Radoslav]

Hello Yishen,

Indeed I verified that the described issue exists into the current version of the controls. Our developers are aware and they will start working on the resolution of this issue. The fix will be available into the Q3 SP1 version of the controls. Please, excuse us for the temporary inconvenience.

All the best,
Radoslav
the Telerik team