>Hi,
>
>I am modifying a web page to use a different set of data for a DevExpress ASPXGridView control.
>I created the new view, then created the new LINQ to SQL class, just as I remember doing for the previous data.
>Now I am getting this error and have no idea what is wrong:
>
>

 Unable to obtain IQueryable instance from 'RESREPRICER.Web.DataClassesTransactionsSuccessDataContext'.'viewTransactionsSuccess' or Selecting event
>Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
>
>Exception Details: System.InvalidOperationException: Unable to obtain IQueryable instance from 'RESREPRICER.Web.DataClassesTransactionsSuccessDataContext'.'viewTransactionsSuccess' or Selecting event
>
>Source Error:
>
>
>Line 15:             if (!IsPostBack)
>Line 16:             {
>Line 17:                 ASPxGridViewMain.ExpandRow(0);
>Line 18:             }
>Line 19:         }
>
>
>Source File: D:\Development\VS2010\RESREPRICER_asp4\ReportAdmin1Success.aspx.cs    Line: 17
>
>Stack Trace:
>
>
>[InvalidOperationException: Unable to obtain IQueryable instance from 'RESREPRICER.Web.DataClassesTransactionsSuccessDataContext'.'viewTransactionsSuccess' or Selecting event]
>   DevExpress.Data.Linq.LinqServerModeDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +3966819
>   System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +22
>   DevExpress.Web.Internal.DataHelper.PerformSelect() +222
>   DevExpress.Web.Internal.GridDataHelper.PerformSelect() +286
>   DevExpress.Web.ASPxDataWebControlBase.PerformSelect(String dataHelperName) +29
>   DevExpress.Web.ASPxGridBase.DataBindNoControls() +82
>   DevExpress.Web.ASPxGridView.ExpandRow(Int32 visibleIndex) +16
>   RESREPRICER.Web.ReportAdmin1Success.Page_Load(Object sender, EventArgs e) in D:\Development\VS2010\RESREPRICER_asp4\ReportAdmin1Success.aspx.cs:17
>   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
>   System.Web.UI.Control.OnLoad(EventArgs e) +95
>   System.Web.UI.Control.LoadRecursive() +59
>   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +678
>
>
>Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.2623.0

>
>Can anyone help me understand this?

https://www.devexpress.com/Support/Center/Question/Details/Q586117/aspxgridview-unable-to-obtain-iqueryable-instance-from-dataclassesdatacontext1-orders-or