[Solved] GridViewDataColumn IsVisible="False"... Error

[Paloma]

Hi everybody!
I'm trying to set the isVisible="False" property in a GridViewDataColumn. But when I execute the application I get the next error:
"Object reference not set to an instance of an object."
Does anybody know why does this happen?
Thanks

[Hristo]

Hello Paloma,

Can you elaborate more about this issue. When is this happening? I've tried to set it in XAML and it is working as expected (no exceptions). Can you share the code snippet that you use to get the column?

Thanks.

Best wishes,
Hristo
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Check out the tips for optimizing your support resource searches.

[Paloma]

Yeah!
That's for sure, I paste you my code. I get the error when loading the page that contains the view:

 

<gridView:RadGridView x:Name="dgArrendamiento" ColumnsWidthMode="Fill" AutoGenerateColumns="False" Width="Auto" Height="700"

 

 

CanUserReorderColumns="False" MaxHeight="160" ShowGroupPanel="False">

 

 

<gridView:RadGridView.Columns>

 

 

<gridView:GridViewColumn Width="27" IsSortable="False" >

 

 

<gridView:GridViewColumn.CellStyle>

 

 

<Style TargetType="grid:GridViewCell">

 

 

<Setter Property="Template">

 

 

<Setter.Value>

 

 

<ControlTemplate TargetType="grid:GridViewCell">

 

 

<Border BorderThickness="0,0,0,1" BorderBrush="#FFB3B3B3">

 

 

<Grid>

 

 

<Border Margin="4" CornerRadius="3" HorizontalAlignment="Center" VerticalAlignment="Bottom" Width="16" Height="16">

 

 

<Image Source="../../Resources/edit.png" Stretch="Fill" HorizontalAlignment="Center" VerticalAlignment="Top" Height="16" Width="16" ToolTipService.ToolTip="Modificar Referencia" MouseLeftButtonUp="btnEditar_Click" Cursor="Hand"/>

 

 

</Border>

 

 

<Rectangle Width="{TemplateBinding VerticalLineThickness}" Fill="{TemplateBinding VerticalLineFill}" HorizontalAlignment="Right"

 

 

Visibility="{TemplateBinding VerticalLineVisibility}" />

 

 

</Grid>

 

 

</Border>

 

 

</ControlTemplate>

 

 

</Setter.Value>

 

 

</Setter>

 

 

</Style>

 

 

</gridView:GridViewColumn.CellStyle>

 

 

</gridView:GridViewColumn>

 

 

<gridView:GridViewColumn Width="27" IsSortable="False" >

 

 

<gridView:GridViewColumn.CellStyle>

 

 

<Style TargetType="grid:GridViewCell">

 

 

<Setter Property="Template">

 

 

<Setter.Value>

 

 

<ControlTemplate TargetType="grid:GridViewCell">

 

 

<Border BorderThickness="0,0,0,1" BorderBrush="#FFB3B3B3">

 

 

<Grid>

 

 

<Border Margin="4" CornerRadius="3" HorizontalAlignment="Center" VerticalAlignment="Bottom" Width="16" Height="16">

 

 

<Image Source="{Binding Ruta}" Stretch="Fill" HorizontalAlignment="Center" VerticalAlignment="Top" Height="16" Width="16" MouseLeftButtonUp="btn_DeleteRefCat"/>

 

 

</Border>

 

 

<Rectangle Width="{TemplateBinding VerticalLineThickness}" Fill="{TemplateBinding VerticalLineFill}" HorizontalAlignment="Right"

 

 

Visibility="{TemplateBinding VerticalLineVisibility}" />

 

 

</Grid>

 

 

</Border>

 

 

</ControlTemplate>

 

 

</Setter.Value>

 

 

</Setter>

 

 

</Style>

 

 

</gridView:GridViewColumn.CellStyle>

 

 

</gridView:GridViewColumn>

 

 

<gridView:GridViewDataColumn IsSortable="False" IsReadOnly="True" HeaderText="Id" DataMemberPath="Id" Width="Auto" TextAlignment="Right"/>

 

 

<gridView:GridViewDataColumn IsSortable="False" IsReadOnly="True" HeaderText="Referencia Catastral" DataMemberPath="Descripcion" Width="Auto"/>

 

 

<gridView:GridViewDataColumn IsSortable="False" IsReadOnly="True" HeaderText="Estado" DataMemberPath="Estado" IsVisible="False"/>

 

 

</gridView:RadGridView.Columns>

 

 

</gridView:RadGridView>

 

[Pavel Pavlov]

Hi Paloma,

I have finally reproduced the problem. Thanks for the XAML provided! It helped  a lot. It seems  that the combination causing the problem is :
setting the ColumnsWithMode to Fill  and the first two columns width to 'Auto.  We are preparing a fix for this. Meanwhile here is the solution you may apply:

Remove the :

1 .ColumnsWidthMode

="Fill" 

 

2. 

Set the First and the Second columns width to 'Auto'
3. Set the third column width to '*'

Hope this helps .

One more time thanks for the reported problem. I have updated your Telerik points.

Greetings,
Pavel Pavlov
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Check out the tips for optimizing your support resource searches.