GridView RowDetails binding issue

[Li]

Hi,

I'm trying to show rowdetails when rowSelected. 'mean' is one of column in DataTable, but I got  binding error. Can someone tell me what went wrong. Thanks.

System.Windows.Data Error: 40 : BindingExpression path error: 'mean' property not found on 'object' ''DataRow' (HashCode=22373539)'. BindingExpression:Path=mean; DataItem='DataRow' (HashCode=22373539); target element is 'TextBlock' (Name=''); target property is 'Text' (type 'String')

<

 

 

telerikGrid:RadGridView x:Name="radGridView" Grid.Row="0" ItemsSource="{Binding DataTable}" AutoGenerateColumns="True"

 

 

 

ShowGroupPanel="False" RowDetailsVisibilityMode="VisibleWhenSelected" IsReadOnly="True"

 

 

 

AutoGeneratingColumn="radGridView_AutoGeneratingColumn"

 

 

 

RowIndicatorVisibility="Collapsed" IsSynchronizedWithCurrentItem="False">

 

 

 

 

<telerikGrid:RadGridView.RowDetailsTemplate>

 

 

 

 

<DataTemplate>

 

 

 

 

<StackPanel Orientation="Horizontal"

 

 

 

Margin="10,10,10,10">

 

 

 

 

<TextBlock Text="Average Measure Value: " />

 

 

 

 

<TextBlock Text="{Binding mean}" />

 

 

 

 

</StackPanel>

 

 

 

 

</DataTemplate>

 

 

 

 

</telerikGrid:RadGridView.RowDetailsTemplate>

 

 

 

 

</telerikGrid:RadGridView>

 

[Vlad]

Hi Li,

 Please use square brackets for the Binding with DataTable, DataView, etc. 

All the best,
Vlad
the Telerik team

[Li]

Could you give me code example how you use square brackets in binding?

Thanks, I got it.

[Leo]

Try binding it behind the code, sample square bracket binding. Hope it helps!

[Browsable(false)]
        public BindingContext BindingContext
        {
            get
            {
                if (bindingContext == null)
                {
                    bindingContext = new BindingContext();
                }
                return bindingContext;

            }
            set
            {
                bindingContext = value;
            }
        }
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        public ControlBindingsCollection DataBindings
        {
            get
            {
                if (dataBindings == null)
                {
                    dataBindings = new ControlBindingsCollection(this);
                }
                return dataBindings;
            }
        }

[Vlad]

Hi,

 You can find more info here:
http://msdn.microsoft.com/en-us/library/cc189022(VS.95).aspx
http://msdn.microsoft.com/en-us/library/cc645024(v=VS.95).aspx

Sincerely yours,
Vlad
the Telerik team

[Julien]

Hi,

Is there a better way to handle this issue in the current version?  I am trying to edit cells (DataTable is underlying binding) but I am getting the same error as described earlier in this thread.  I create my columns in code and instantiate a Binding object such as Binding b = new Binding("columnName");

If I update my code to Binding b = new Binding("[columnName]"), the exception goes away.  However, other parts of the grid fail such as grouping since my column names in the DataTable do actually do not have brackets (and they should not). 

Perhaps I am not applying the suggestion of this thread correctly.

Could you please help?

Thanks,
Julien

[Vlad]

Hello,

 You will not have problems with grouping with such binding. I've attached an example project for reference. 

Greetings,
Vlad
the Telerik team

[Julien]

Thanks for reply but your sample project defines the columns in xaml.  I have to create the binding in code since columns are determined at runtime.  How would you do it?

[Vlad]

Hello,

 You you will get correct behavior no matter if the column is created programmatically or declared in XAML. You can check the attachment for reference.  

Regards,
Vlad
the Telerik team

[Julien]

Thanks again for your quick response.  Your sample project uses binding in xaml.  I cannot do this as I do not know the column names before runtime.  For example, account xyz is selected by a user and the columns are generated at runtime based on the accout number that is selected by the user (ie I cannot have <TextBlock Text="{Binding [ID]}" /> since I don't know the name of the columns ahead of time).  This is why I like to use I DataTable as I can just create the desired columns at runtime.

Please let me know.

Julien

[Vlad]

Hello,

 In this case you may need to create your RowDetailsTemplate programmatically. Recently Pete Brown posted very good blog post related to this. You can check it here.

Best wishes,
Vlad
the Telerik team