[Solved] Custom column editors being passed "Telerik.Web.UI.GridInsertionObject"

[David Apelt]

We are upgrading our internal control library to use the Prometheus Futures. With the RadGrid (Ver 2008.1.325.35) we have place a level of abstraction around it so that it will natively talk to our ORM framework.

We have found a problem when we click the 'Add new row' icon.  When the databinding occurs and calls our custom column editors that inherit from GridTextColumnEditor the value of the Text property is set to string "Telerik.Web.UI.GridInsertionObject" rather than the empty string.

This used to work with RadControl ASP.NET

I have attempted to simulate the problem using a statically loaded grid and a custom column editor but I could not reproduce the problem.  In order to properly reproduce the problem I may have to spend some time (ie days) carefully unpeeling our abstraction layer until I isloate the problem. 

Do you have any ideas about where the problem may lay?

Regards
Dave A

[FormatException: Input string was not in a correct format.]
   System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +2755599
   System.Number.ParseDouble(String value, NumberStyles options, NumberFormatInfo numfmt) +117
   System.Double.Parse(String s, NumberStyles style, NumberFormatInfo info) +189
   System.Double.Parse(String s) +20
   Signmanager.Web.UI.WebControls.FloatingPointEditor.set_Text(String value) +153
   Telerik.Web.UI.GridBoundColumn.OnDataBindColumn(Object sender, EventArgs e) +825
   System.Web.UI.Control.OnDataBinding(EventArgs e) +99
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +206
   System.Web.UI.Control.DataBind() +12
   System.Web.UI.Control.DataBindChildren() +204
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +216
   System.Web.UI.Control.DataBind() +12
   System.Web.UI.Control.DataBindChildren() +204
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +216
   System.Web.UI.Control.DataBind() +12
   System.Web.UI.Control.DataBindChildren() +204
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +216
   System.Web.UI.Control.DataBind() +12
   System.Web.UI.Control.DataBindChildren() +204
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +216
   System.Web.UI.Control.DataBind() +12
   System.Web.UI.Control.DataBindChildren() +204
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +216
   System.Web.UI.Control.DataBind() +12
   System.Web.UI.Control.DataBindChildren() +204
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +216
   System.Web.UI.Control.DataBind() +12
   System.Web.UI.Control.DataBindChildren() +204
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +216
   System.Web.UI.Control.DataBind() +12
   System.Web.UI.Control.DataBindChildren() +204
   System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +216
   System.Web.UI.Control.DataBind() +12
   Telerik.Web.UI.GridEditFormItem.SetupItem(Boolean dataBind, Object dataItem, GridColumn[] columns, ControlCollection rows) +477
   Telerik.Web.UI.GridTableView.CreateInsertItem(Boolean useDataSource, GridEnumerableBase resolvedDataSource, ControlCollection rows) +468
   Telerik.Web.UI.GridTableView.CreateTopInsertItem(Boolean useDataSource, GridEnumerableBase resolvedDataSource, GridTHead tHead) +114
   Telerik.Web.UI.GridTableView.CreateControlHierarchy(Boolean useDataSource) +1483
   Telerik.Web.UI.GridTableView.CreateChildControls(IEnumerable dataSource, Boolean useDataSource) +638
   System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding(IEnumerable data) +59
   System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) +111
   System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +29
   System.Web.UI.WebControls.DataBoundControl.PerformSelect() +149
   Telerik.Web.UI.GridTableView.PerformSelect() +42
   System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +70
   Telerik.Web.UI.GridTableView.DataBind() +461
   Telerik.Web.UI.GridTableView.Rebind() +130
   Telerik.Web.UI.GridTableView.InsertItem(IDictionary newValues) +255
   Telerik.Web.UI.GridTableView.InsertItem() +47
   Telerik.Web.UI.GridCommandEventArgs.ExecuteCommand(Object source) +5023
   Telerik.Web.UI.RadGrid.OnBubbleEvent(Object source, EventArgs e) +233
   System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +35
   Telerik.Web.UI.GridItem.OnBubbleEvent(Object source, EventArgs e) +95
   System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +35
   Telerik.Web.UI.GridItem.OnBubbleEvent(Object source, EventArgs e) +198
   System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +35
   System.Web.UI.WebControls.Button.OnCommand(CommandEventArgs e) +115
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +163
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1746

[Rosen]

Hello David Apelt,

Unfortunately I'm not sure what may be the cause of this unwanted behavior with the given details. Therefore we will highly appreciate it if you can send us (attached to a formal ticket) a small working project in which this behavior can be reproduced. Doing so, we will be able to gather more details about your case and hopefully supply you with a suitable solution.

Regards,
Rosen
the Telerik team

Instantly find answers to your questions at the new Telerik Support Center

[Neil]

David,
I'm using NHibernate, and I was having an identical problem. I was able to solve it by simply changing the DataSource of my grid.

When I was having the problem, I was doing something like:

IList queryqueryResults = query.List();
myGrid.DataSource = queryResults;

To fix it, I changed the IList to a generic version:

IList<MyORMType> queryqueryResults = query.List<MyORMType>();
myGrid.DataSource = queryResults;

Maybe using the generic list lets the RadGrid do some reflection to get extra info. Who knows, but it works for me.