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[Solved] Problem when using filter in RadGridView

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GridView

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Triet Nguyen Cong asked on 01 Oct 2010, 11:11 AM

1. Filter is allow: I'm only using DataMemberBinding

<Controls3:RadGridView Name="gvAdvisorTasks"

CanUserFreezeColumns="False"

RowIndicatorVisibility="Collapsed"

AutoGenerateColumns="False"

ShowGroupPanel="False"

AutoExpandGroups="True"

IsFilteringAllowed="True"

Visibility="{Binding HasRecord}"

ItemsSource="{Binding Path=AdvisorTaskCollections}" TabIndex="19">

<Controls3:RadGridView.Columns>

<Controls3:GridViewDataColumn Header="Task Details"

DataMemberBinding="{Binding Path=Description}"

IsReadOnly="True"/>

</Controls3:RadGridView.Columns>

</Controls3:RadGridView>

2. Filter not allow: I'm only binding in CellTemplate

<Controls3:RadGridView Name="gvAdvisorTasks"

CanUserFreezeColumns="False"

RowIndicatorVisibility="Collapsed"

AutoGenerateColumns="False"

ShowGroupPanel="False"

AutoExpandGroups="True"

IsFilteringAllowed="True"

Visibility="{Binding HasRecord}"

ItemsSource="{Binding Path=AdvisorTaskCollections}" >

<Controls3:RadGridView.Columns>

<Controls3:GridViewDataColumn Header="Task Details"

IsReadOnly="True">

<Controls3:GridViewDataColumn.CellTemplate>

<DataTemplate>

<TextBlock Text="{Binding Path=Description}"/>

</DataTemplate>

</Controls3:GridViewDataColumn.CellTemplate>

</Controls3:GridViewDataColumn>

</Controls3:RadGridView.Columns>

</Controls3:RadGridView>

3. Not Normal- filter is allow: i'm binding both place: DataMemberBinding and CellTemplate.

<Controls3:RadGridView Name="gvAdvisorTasks"

CanUserFreezeColumns="False"

RowIndicatorVisibility="Collapsed"

AutoGenerateColumns="False"

ShowGroupPanel="False"

AutoExpandGroups="True"

IsFilteringAllowed="True"

Visibility="{Binding HasRecord}"

ItemsSource="{Binding Path=AdvisorTaskCollections}">

<Controls3:RadGridView.Columns>

<Controls3:GridViewDataColumn Header="Task Details"

DataMemberBinding="{Binding Path=Description}"

IsReadOnly="True">

<Controls3:GridViewDataColumn.CellTemplate>

<DataTemplate>

<TextBlock Text="{Binding Path=Description}" />

</DataTemplate>

</Controls3:GridViewDataColumn.CellTemplate>

</Controls3:GridViewDataColumn>

</Controls3:RadGridView.Columns>

</Controls3:RadGridView>

So, Why that? Is that bug?

3 Answers, 1 is accepted

Accepted

answered on 04 Oct 2010, 07:09 AM

Hi Triet Nguyen Cong,

Actually this is the expected behavior - you need to specify DataMemberBinding to be able to sort, filter or group a column. When you only specify a cell template the grid does not have a clue which property should be used for data operations.

When you specify CellTemplate you are redefining the way data gets displayed and that is why you should create binding expressions in CellTemplate in addition to the binding specified in DataMemberBinding.

I hope this makes sense.

All the best,
Milan
the Telerik team

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