Hi all,

I've got a weird problem and i can't figure out what's happening :(

On my web page, i've a webdatagrid with 2 columns (Sequence and ItemCode).  Sequence is readonly.

The DataKeyFields is the sequence field.

Under the WebDataGrid, i've 2 asp buttons (add and delete).

Here is a sample of the Page_Load method :

if (!IsPostBack)

{

PreOrderItems = new List<PreOrderItem>();

WebDataGrid_CreateOrder.DataSource = PreOrderItems;

WebDataGrid_CreateOrder.DataBind();

}

else

{

GetData();

WebDataGrid_CreateOrder.ClearDataSource();

WebDataGrid_CreateOrder.DataSource = PreOrderItems;

WebDataGrid_CreateOrder.Rows.Clear();

WebDataGrid_CreateOrder.DataBind();

}

When i click on the add button, i'm adding one element in my PreOrderItems property which is a IEnumerable<Item> -> PreOrderItems.Add(new Item { Sequence = 1, ItemCode = "Test"});

So when the page is reloaded, the PreOrderItems is binded to the grid with the new item.

Now, when i click on the delete button, i'm removing this element from my PreOrderItems property and then then the PreOrderItems is binded to the grid when the page_load occurs.

But after the event of my delete button i got the following exception :

Requested record cannot be found by key

[MissingRecordException: Requested record cannot be found by key.] Infragistics.Web.UI.GridControls.EditingCore.OnAction(String actionType, Object id, Object value, Object tag) +836 Infragistics.Web.UI.GridControls.GridBehavior.Infragistics.Web.UI.GridControls.IGridBehavior.OnAction(String actionType, Object id, Object value, Object tag) +48 Infragistics.Web.UI.GridControls.GridBot.LoadAdditionalClientState(Object state) +670 Infragistics.Web.UI.Framework.RunBot.HandleRaisePostDataChangedEvent() +202 Infragistics.Web.UI.GridControls.GridBot.HandleRaisePostDataChangedEvent() +73 Infragistics.Web.UI.Framework.Data.FlatDataBoundControl.RaisePostDataChangedEvent() +34 System.Web.UI.Page.RaiseChangedEvents() +165 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1485

It seems that the grid is keeping a reference to my previous databind and it cannot find the deleted item ???

I thought that a simple databind with a new list could be possible but it's not.

Am i doing something wrong ?

Thank you for your help.

Btw, it works on Google Chrome but not on Internet Explorer 8.0