Automatic Grouping / Filtering does not work

[Deven]

Hi,
I bind the grid as follows, does not allow me to group or filter on "Category" column. The data I am binding to it is a lookup class. The binding works perfectly, however the grouping  and filtering on that column is not available. 

 

 

<telerikGridView:RadGridView.Columns>

 

 

 

<telerikGridView:GridViewDataColumn HeaderText="Year" DataMemberPath="AcademicYear"/>

 

 

 

<telerikGridView:GridViewDataColumn HeaderText="Category" IsGroupable="True" DataMemberPath="Category.CodeDes"/>

 

 

 

<telerikGridView:GridViewDataColumn HeaderText="Days" DataMemberPath="EffectiveDays"/>

 

 

 

<telerikGridView:GridViewDataColumn HeaderText="Occurance" DataMemberPath="Occurances"/>

 

 

 

</telerikGridView:RadGridView.Columns>

 

Please help.

[Vlad]

Hello Deven,

You may need to implement IComparable and IEquatable<> for this property.

Regards,
Vlad
the Telerik team

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[Deven]

Vlad, thanks for your quick reply.
Since I cannot modify the actual class, I implemented a partial class in to my project as following, it still wont work. FYI CodeDes is string property.

public

 

partial class Category : IEquatable<string>, IComparable<string>

 

 

 {

 

#region IEquatable<string> Members

 

    public bool Equals(string other)

 

        {

return this.CodeDes == other; }

 

 

 

#endregion

#region

 

IComparable<string> Members

 

 

    public int CompareTo(string other)

 

        {

return this.CodeDes.CompareTo(other); }

 

 

#endregion

}

[Vlad]

Hello Deven,

I've attached small example to illustrate you this. Although groping will work with simple IEquatable<> implementation looks like you will need to define equality operators to handle filtering - this was a bit unexpected since we thought that LINQ will handle this automatically.

Let me know how it goes.

Kind regards,
Vlad
the Telerik team

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Check out the tips for optimizing your support resource searches.

[Deven]

Sorry for late reply. I took another route. I extended my entity with a property that will read description from the complex type. Since it was just one-off I was able to make this decision. I have not got a chance to look at your solution, but I promise when I hit back into this situation I will surely check it out.

Many thanks.
Deven