Problem setting a default filter for the grid

[Jacob]

Hello Telerik,

 

I have carefully read the examples you provided here and this one in particular seems to be the one I need

[C#] Example 4: A custom FilterDescriptor
// Give me all people that are with first name John.
var fd = new FilterDescriptor();
fd.Member = "FirstName";
fd.Operator = FilterOperator.IsEqualTo;
fd.Value = "John";
fd.IsCaseSensitive = true;

// In most cases the data engine will discover this automatically so you do not need to set it.
fd.MemberType = typeof(string);

 

It works. The grid starts filtered as expected, however it is not possible for the user to revert that initial filter.

Is there anything missing? I tried to find a running example for those filterdescriptors, but i couldn't. If there is one, can you please provide it?

 

Thank you!

[Jacob]

Please update me on this as soon as possible. thank you

[Dilyan Traykov]

Hello Jacob,

As stated in the aforementioned article, if you need the filtering criteria you've defined to be reflected in RadGridView's UI (and thus later clearable by the user), you need to use the IColumnFilterDescriptor contract. You can obtain such a descriptor for a given column by accessing its ColumnFilterDescriptor property. You can then modify it as suggested here.

var fd = this.radGridView.Columns["FirstName"].ColumnFilterDescriptor;
fd.FieldFilter.Filter1.Operator = FilterOperator.IsEqualTo;
fd.FieldFilter.Filter1.Value = "John";
fd.FieldFilter.Filter1.IsCaseSensitive = true;

I hope you find this information helpful. Do let me know if you need any further assistance on the matter.

Regards,
Dilyan Traykov
Telerik by Progress