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Show only first letter in Group Header

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Inger Marie
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Inger Marie asked on 02 Sep 2014, 08:47 AM
I have a GridView which contains a name column - and the name may be null or " " or "" or a real name.

Name1: null
Name2: " "
Name3: ""
Name4: "Obama"
Name5: "obama"
Name6: " obama" (should be grouped with Obama and not with "")

In the group header I would like to group by the names first letter - or "" if there String.IsNullOrWhiteSpace is true. And I would like the group header to ignore the case of the first letter.
There are other columns in the GridView which I do not want grouped like this.

I have done this:

But that leaves an ugly square in the header if the name is null - (and " " and "" are grouped in two different groups. So is "Obama" and "obama" and " obama").

I have a quite a few of these name-columns around in my program, so I would like an elegant, reusable solution :ΓΈ) What I really need is a way to add a Converter to the group binding.

Normally I would use a converter, but there does not seem to be a way to add a converter to the groupmemberpath (?)
There is a GroupHeaderFormatString; but I have failed to find a way to get {}{0:<something>} to return the first letter.
The type of Name is String. I really do not want to change this so adding a FirstLetter-property is not a solution either.
Seems like adding a GroupHeaderTempate will only affect the text in the group header. It will not allow me to group "Obama" and "obama" in the same group.

Is there a solution to this?

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Telerik team
answered on 02 Sep 2014, 02:52 PM

In order to define the way the grouping to be applied, you can check our online documentation on Using generic GroupDescriptor.

You can also check this forum thread where a similar question was already discussed.

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