While grouping by some columns i will get Error: "System.InvalidOperationException: Collection was modified; enumeration operation may not execute."
So can you please help me...
Details error :
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; InfoPath.2; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; MS-RTC EA 2)
Timestamp: Fri, 4 Dec 2009 09:29:15 UTC
Message: Unhandled Error in Silverlight Application
Code: 4004
Category: ManagedRuntimeError
Message: System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Collections.Generic.List`1.Enumerator.MoveNext()
at System.Linq.Enumerable.<CastIterator>d__aa`1.MoveNext()
at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
at System.Linq.Enumerable.Sum(IEnumerable`1 source)
at System.Linq.Enumerable.Sum[TSource](IEnumerable`1 source, Func`2 selector)
at Telerik.Windows.Data.GroupExtensions.LeavesCount(IEnumerable`1 groups)
at Telerik.Windows.Data.QueryableCollectionView.get_ItemCount()
at Telerik.Windows.Controls.GridView.GridViewDataControl.OnCollectionViewCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
at Telerik.Windows.Data.QueryableCollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
at Telerik.Windows.Data.QueryableCollectionView.RefreshAndRaiseCollectionChanged(NotifyCollectionChangedEventArgs args)
at Telerik.Windows.Data.QueryableCollectionView.Refresh()
at Telerik.Windows.Data.QueryableCollectionView.EndDefer()
at Telerik.Windows.Data.QueryableCollectionView.DeferHelper.Dispose()
at Telerik.Windows.Controls.GridView.GridViewDataControl.PerformGrouping(String member, Object displayContent, Nullable`1 insertionIndex)
at Telerik.Windows.Controls.GridView.GridViewDataControl.<>c__DisplayClass2a.<GroupingRequested>b__29()
at Telerik.Windows.Controls.CursorManager.PerformTimeConsumingOperation(FrameworkElement frameworkElement, Action action)
at Telerik.Windows.Controls.GridView.GridViewDataControl.GroupingRequested(Object origin, GroupingRequestedEventArgs e)
Line: 67
Char: 13
Code: 0
Also can you tall me where should i get the Grouping Completed event.
Thanks In Advance....
S s.
8 Answers, 1 is accepted
Can you post more info how to reproduce this? More info about the grid version will be helpful as well.
Greetings,
Vlad
the Telerik team
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Rank 1
whenever i will drag my state column in to the Group By Header Zone then this will occures.
We are using the Q 3 lastest version ( 2009.2.0812.1030)
Thanks ..
S s
Generally 2009.2.0812.1030 is Q2 SP1 not Q3. Can you reproduce the same on some of our online examples?
All the best,
Vlad
the Telerik team
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Rank 1
your online examples are having the very less amount of data.
In my application we are having 20,000 records. Whenver i will drag some columns combinaton , it wil throw error.
Currently we are using the IE 8.0
So can you please help us out................
Regards,
S s.
On this demo the grid is bound to 1mil. records. You may need also to check your scenario with latest Q3 version - this week we will publish also our official Q3 SP1.
Best wishes,
Vlad
the Telerik team
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Rank 1
So is there any other way to communicate the error...
Regards,
S s
Rank 1
In your demo, you have shown grouping on multiple columns but no aggregation specified.
As per my requirement i need to have Aggregation operation for each column (Sum / Avg / Count etc...). I applied the aggregation functions as per my requirements and displying at footer.
And in my implementation i am dealing with Entity classes where i am having nullable types. The Grouping working fine when i am grouping with one column. when i am going to group with second column, RAD gridview control is throwing error.
More over the information i am binding here is pure financial information and using required data formatters while presenting the data.
please suggest a solution.
Have you checked your scenario with our latest Q3 version?
Kind regards,
Vlad
the Telerik team
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