Hi all,



I am having a problem using the GridView component and the WebBusinessBindingSource. When I click update or cancel on the grid, I get the message: The business object 'Customers' could not be found on this page.





[InvalidOperationException: The business object 'Customers' could not be found on this page.]

MicroFour.StrataFrame.UI.Web.BasePage.GetBusinessObject(String Name) +150

MicroFour.StrataFrame.UI.Web.WebBusinessBindingSource.GetBusinessObject() +109

MicroFour.StrataFrame.UI.Web.WebBusinessBindingSource.GetView(String viewName) +51

System.Web.UI.DataSourceControl.System.Web.UI.IDataSource.GetView(String viewName) +7

System.Web.UI.WebControls.DataBoundControl.ConnectToDataSourceView() +226

System.Web.UI.WebControls.DataBoundControl.GetData() +4

System.Web.UI.WebControls.DataBoundControl.PerformSelect() +57

System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +70

System.Web.UI.WebControls.GridView.DataBind() +4

System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +82

System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +69

System.Web.UI.Control.EnsureChildControls() +87

System.Web.UI.Control.FindControl(String id, Int32 pathOffset) +21

System.Web.UI.Control.FindControl(String id, Int32 pathOffset) +289

System.Web.UI.Page.FindControl(String id) +40

System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +252

System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3776



To work from a common ground I have simply taken the C# Web Sample code, added a page (StrataFrame Web Form), dragged on a WebBusinessBindingSource, bound it to the Customers business object, dragged on a grid and bound the grid to the WebBusinessBindingSource. When running the app, if I click the edit on a row and then click either update or cancel, I get the above exception.



There must be something amazingly simple that I am missing here ...



Please will someone point me in the right direction to resolve this.



Many thanks.



Gavin

Hi Gavin.

Have you inherited the ApplicationBasePage within your new webform?

The ApplicationBasePage is where you should declare all your Business Objects, and your webforms should inherit from it.

Have a look at the Help under "Application" -> "WebForms" -> "ApplicationBasePage Classes"

Hope it helps.

Just to add to Ivan's comments, when you create a new web form within a StrataFrame website, there is a template that will already inherit off of the ApplicationBasePage.  We sure to use the SF Web Form instead of a standard Web Form:

Hi guys,



Thanks for the quick responses. I was certain that I'd done that, but have deleted the page and recreated it and the error has gone away!



I hang my head in shame...



Thanks.



Gavin

LOL...nothing to worry about at all.  I am just glad you got it going!

Hi there,

It seems that I spoke too soon.   I'm am now attempting to catch the ActiveRowChanged event within an Infragistics WebGrid in order to trigger other changes

in associated controls.   When I bind the grid to a SqlDatasource, this works without a problem, however when I drop a WebBusinessBindingSource

onto the page bound to my business object and with the grid bound to the datasource, any attempts to capture the ActiveRowChange event results

in the same kind of error.   I have redone this within your sample C# web app to check that I wasn't doing something daft, but the behavior is the same:

I don't even have to do anything within the event for this to occur.

The business object 'Customers' could not be found on this page.

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: The business object 'Customers' could not be found on this page.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[InvalidOperationException: The business object 'Customers' could not be found on this page.] MicroFour.StrataFrame.UI.Web.BasePage.GetBusinessObject(String Name) +150 MicroFour.StrataFrame.UI.Web.WebBusinessBindingSource.GetBusinessObject() +109 MicroFour.StrataFrame.UI.Web.WebBusinessBindingSource.GetView(String viewName) +51 System.Web.UI.DataSourceControl.System.Web.UI.IDataSource.GetView(String viewName) +7 Infragistics.WebUI.UltraWebGrid.UltraWebGrid.GetDataSourceView() +295 Infragistics.WebUI.UltraWebGrid.UltraWebGrid.DataBind() +289 Infragistics.WebUI.UltraWebGrid.UltraWebGrid.LoadPostData(String postDataKey, NameValueCollection values) +4745 System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +408 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3776

Any thoughts?

Many thanks in advance,

Gavin

Gavin,

Have you downloaded this C# sample (http://forum.strataframe.net/FindPost12344.aspx)?  Because I have run this sample over and over again and it is working just fine.  So first, download this sample, open the solution and press Ctrl+F5.  The sample should run and you should be able to go to the Customers Grid without issue.  If this doesn't work, then there is something else in the mix here.

Hi there,



Yes I have downloaded the sample - the updated version that includes the WebBindingSource.aspx page. I run the sample, click edit against a record, and then cancel and get my favourite message:



Server Error in '/SampleWebApp - CSharp' Application.

--------------------------------------------------------------------------------



The business object 'Customers' could not be found on this page.

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: The business object 'Customers' could not be found on this page.



Source Error:



An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.



Stack Trace:





[InvalidOperationException: The business object 'Customers' could not be found on this page.]

MicroFour.StrataFrame.UI.Web.BasePage.GetBusinessObject(String Name) +150

MicroFour.StrataFrame.UI.Web.WebBusinessBindingSource.GetBusinessObject() +109

MicroFour.StrataFrame.UI.Web.WebBusinessBindingSource.GetView(String viewName) +51

System.Web.UI.DataSourceControl.System.Web.UI.IDataSource.GetView(String viewName) +7

System.Web.UI.WebControls.DataBoundControl.ConnectToDataSourceView() +226

System.Web.UI.WebControls.DataBoundControl.GetData() +4

System.Web.UI.WebControls.DataBoundControl.PerformSelect() +57

System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +70

System.Web.UI.WebControls.GridView.DataBind() +4

System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +82

System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +69

System.Web.UI.Control.EnsureChildControls() +87

System.Web.UI.Control.FindControl(String id, Int32 pathOffset) +21

System.Web.UI.Control.FindControl(String id, Int32 pathOffset) +289

System.Web.UI.Page.FindControl(String id) +40

System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +252

System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3776









--------------------------------------------------------------------------------

Version Information: Microsoft .NET Framework Version:2.0.50727.832; ASP.NET Version:2.0.50727.832



Kind regards,



Gavin

Hi there,

Any ideas concerning what is amiss here as this is preventing me from using Strataframe for this project?  

I have tried various things, but unfortunately cannot spend any more time on it - it seems as if the business objects are not ending up in the session?   I can allow a TS session to the machine if poking around on it will help (email me for details).

Kind regards,

Gavin

Sorry for the delay, gavin, we're looking into it.