I looked at the two links you posted and tried what they suggest and it still does not work

Here is the grid itself:

<

ig:WebDataGrid ID="UserGrid2" runat="server" Width="600px" AutoGenerateColumns="False"

DataKeyFields="User_ID" EnableDataViewState="True" ViewStateMode="Enabled">

<Columns>

<ig:BoundDataField DataFieldName="User_ID" Hidden="True" Key="User_ID">

<Header Text="User_ID" />

</ig:BoundDataField>

<ig:BoundDataField CssClass="leftcol" DataFieldName="FirstName_NM"

Key="FirstName_NM" Width="100px">

<Header Text="First Name" />

</ig:BoundDataField>

<ig:BoundDataField CssClass="leftcol" DataFieldName="LastName_NM"

Key="LastName_NM" Width="100px">

<Header Text="Last Name" />                                    

</ig:BoundDataField>

<ig:UnboundCheckBoxField HeaderCheckBoxMode="Off" HeaderChecked="False"

Key="ShowHasCat" Width="100px">

<Header Text="Category Issue Owner" />

</ig:UnboundCheckBoxField>

<ig:BoundCheckBoxField DataFieldName="HasCat" DataType="System.Boolean"

Key="HasCat" Width="100px" Hidden="True">

<Header Text="Category Issue Owner" />

</ig:BoundCheckBoxField>

<ig:BoundDataField DataFieldName="CatList" Key="CatList" CssClass="leftcol"

HtmlEncode="False">

<Header Text="User Categories and Locations" />

</ig:BoundDataField>

<ig:BoundCheckBoxField DataFieldName="HasParentCat" DataType="System.Boolean"  Hidden="True"

Key="HasParentCat">

<Header Text="BoundColumn_0" />

</ig:BoundCheckBoxField>

</Columns>

<Behaviors>

<ig:EditingCore AutoCRUD="False">

<Behaviors>

<ig:CellEditing>

<ColumnSettings>

<ig:EditingColumnSetting ColumnKey="FirstName_NM" ReadOnly="True" />

<ig:EditingColumnSetting ColumnKey="LastName_NM" ReadOnly="True" />

<ig:EditingColumnSetting ColumnKey="HasCat" ReadOnly="True" />

<ig:EditingColumnSetting ColumnKey="CatList" ReadOnly="True" />

</ColumnSettings>

</ig:CellEditing>

</Behaviors>

</ig:EditingCore>

<ig:Paging PageSize="30">

</ig:Paging>

</Behaviors>

</ig:WebDataGrid>

I have one button (BUTTON1) on the page that looks at the grid and updates the data.

I have another control (CONTROL2) on the page that when selected changes the data in the grid (brings back different rows)

The update (BUTTON1) works fine, and the control (CONTROL2) works fine if the grid has not been edited. 

However if I click on one of the checkboxes in the grid and then hit CONTROL2 to refresh the grid data, I get the error above. 

The code to rebind the grid is below:

Dim dt As DataTable

UserGrid2.ClearDataSource()

 dt = SCDB.DB2.ExecSelectSP("GetUsersListSearchForCategory", _        New SqlParameter("@SearchName", SearchName), _        New SqlParameter("@CategoryID", CategoryDDL.SelectedValue), _        New SqlParameter("@EntityID", SearchEntityDDL.SelectedValue))

UserGrid2.DataSource = dt UserGrid2.DataBind()

From the error message it appears that the issue is because ViewState is enabled that the grid is trying to reload the viewstate from before, but because the rows are different now it can't.  Is there a way in code to tell the grid to NOT try to reload the view state.  Shouldn't this be handled automatically when the Grid is rebound?

Thanks for your help

Hi azitas,

I would suggest you to try this without calling the ClearDataSource method.

Let me know if this helps.

Hello,

You could try binding only on the first page load and if you will change the data source, do this on PreRender. And using ClearDataSource method should  be fine. Also, I would suggest you to use the latest service release for 12.1/12.2 as there is a known issue with clearing the data source when EnableDataViewState is set to true, which is resolved now.

No this is not resolved.  Yes - I can turn viewstate off and I don't get the error, however I use the viewstate to persist information in the grid, so I can't just turn it off in my application.  Why shouldn't this work with viewstate turned on?

Hello,

I'm just checking if you managed to resolve your issue.

Hi,

You could also try to disable grid's Viewstate by setting its EnableViewState property to false. Try to set EnableDataViewState property to false as well.

I tried it with our without that and get the same thing