Remove Column error - Index was out of range.

[Brandon]

Telerik.Web.UI : runtime = v2.0.50727, ver = 2008.2.723.20

Error when removing column from grid.

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index 

Process I am going through:

1. user selects add column on the page
2. Post back, add column to datasource
3. rebind grid
    (grab data from datasource, clear columns from grid, add all current columns)
4. user selects delete column
5. confirm delete
6. postback, delete column from datasource
7. rebind grid
    (grab data from datasource, clear columns from grid, add all current columns)

This works if all of this is done continuously. However, if I navigate off of this page at before step 4 and return to the page and continue, then I receive the error above.

Note: on NeedDataSource event I am setting datagrid.DataSource to the System.Data.DataTable

i dont know if it has to do with the viewstate? i tried to provide as much info as i can, let me know if anything else is required.

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[External Code]
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[Vlad]

Hello Brandon,

Can you verify what will be result if you set MasterTableView.EnableColumnsViewState to false?

Regards,
Vlad
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[Brandon]

Thanks! Setting this property to false fixed my issue.

My problem is solved but I was wondering, if i was to leave the MasterTableView.EnableColumnsViewState set to true, what is the appropriate way to tell the grid that the column is marked to be deleted.

Its not a big deal if you dont answer my new question, I am just asking because I'm curious.

Anyways, thanks again!

-Brandon

[Vlad]

Hello Brandon,

By default the grid columns are stored in ViewState and grid will try to recreate them on subsequent post backs. Add/remove columns on the fly with turned on ViewState is not supported - you can use Visible property for example to show/hide columns instead. When you turn off the columns ViewState you can safely add and/or remove columns on the fly without messing the grid state.

Sincerely yours,
Vlad
the Telerik team

Check out Telerik Trainer, the state of the art learning tool for Telerik products.

[Srinivas]

Thanks for providing a nice solution. It has resolved my issue.