[Solved] Hiding column programatically

[Chris]

When setting a column to invisible at runtime, when checking the Row.Cells (in the BeginningEdit event), the hidden column is not there. 

Is there a way to check the value that is stored in the hidden cell at that time? 

Currently the grid is bound to the DataTable (using the example by Vladimir Enchev), however I believe this may happen even if the ItemSource is an ObservableCollection.

Thank you in advance

Chris

 

[Pavel Pavlov]

Hi Chris,

You may get the values of the underlying data from the cells , but also form the underlying data object.

If you have the row , you may check its DataContext. Typically it would be your data with all the fields (including those not visible on screen at the moment).

You can cast the Row.DataContext to your business object and check relevant values.

 Regards,

Pavel Pavlov
the Telerik team

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[Chris]

Hi Pavel,

When checking the value of e.Row.DataContext, I get "Could not evaluate expression".

Chris

[Pavel Pavlov]

Hi Chris,

In the attached sample we have a RadGridView with three columns. The third column titled "Age" is not visible. Within the BeginningEdit handler we display the value of the 'hidden' Age cell in a Texblock under the grid. I hope this covers your scenario.

Best wishes,
Pavel Pavlov
the Telerik team

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[Chris]

Hi Pavel,

Thank you for your replies...

It appears that this may be happening only when bound to the DataTable (see example from Vladimir Enchev at http://blogs.telerik.com/vladimirenchev/posts/09-04-23/lightweight_datatable_for_your_silverlight_applications.aspx).

I then get the "Could not evaluate expression" when checking the e.Row.DataContext. 

What does the DataContext rely on?

Thanks in advance.

Regards,

Chris

[Vlad]

Hi Chris,

You can use reflection to get desired value. Here is an example:

void RadGridView1_BeginningEdit(object sender, Telerik.Windows.Controls.GridViewBeginningEditRoutedEventArgs e)
{
   int id = (int)e.Row.DataContext.GetType().GetProperty("ID").GetValue(e.Row.DataContext, null);
}

All the best,
Vlad
the Telerik team

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[Chris]

Thanks once again for all you help Vlad.  That works great.