[Solved] RadGrid sorting does not work on all types of data sources

[Sjoerd]

I am using the default RadGrid sorting feature, but it only works in some cases. For example:

<telerik:RadGrid runat="server" ID="NumbersGrid" AllowSorting="true" OnNeedDataSource="NeedNumbers" />

protected void NeedNumbers(object sender, GridNeedDataSourceEventArgs e)
{
    ((RadGrid)sender).DataSource = Enumerable.Range(1, 10).Select(number => new { number });
}

This displays 10 numbers in a grid, as you would expect. If you click on the header, a sorting arrow appears but the grid does not actually become sorted. How come?

I am using Telerik 2012.1.

[Eyup]

Hello Sjoerd,

I have created a sample RadGrid web site to test the described behavior. On my side everything works as expected and the grid content is sorted correctly. Please check out the attached application and let me know about the result.

Regards,
Eyup
the Telerik team

[Sjoerd]

Thanks Eyup, for your response.

I tried the example project you supplied. I copied the files into an empty website project and added references to Telerik. It did not work. It still did not do any sorting, and keeps showing the numbers 1 through 5.

I then tried with Telerik 2012.3 v1218. This works correctly. It seems like this issue is already solved. We will be using this newer version in the future, thank you for your help.

[Jeff]

Looks like you've already solved your issue... but for those with the same issue who can't/don't want to upgrade; I've found that this issue is resolved by merely adding a .ToList() call do the end of the Linq chain. Not sure exactly why the sort and filtering are failing on the IEnumerable(T) directly.