I'm trying to use data sources with data bound controls on one of my
pages that's using a master page. The master page has 2
ContentPlaceHolders, and in my page the data sources are in the first
content area, and the data bound controls are in the second. The data
bound controls are having a problem seeing the data sources at run time
(even though everything is picked up by the visual studio at design
time).
I get an error message similar to the following:
----------------------------------------
[HttpException (0x80004005): The DataSourceID of 'drpEmployee' must be
the ID of a control of type IDataSource. A control with ID
'EmployeeDataSource' could not be found.]
System.Web.UI.WebControls.DataBoundControl.GetData Source() +194
System.Web.UI.WebControls.DataBoundControl.Connect ToDataSourceView()
+160
System.Web.UI.WebControls.DataBoundControl.OnLoad( EventArgs e) +17
System.Web.UI.Control.LoadRecursive() +49
System.Web.UI.Control.LoadRecursive() +132
System.Web.UI.Control.LoadRecursive() +132
System.Web.UI.Control.LoadRecursive() +132
System.Web.UI.Control.LoadRecursive() +132
System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
+3695
----------------------------------------
After scouring the net for information on this error, I found that it's
most likely because the datasource is being loaded after the control
that's referencing it. When I move the datasource into the same
content area as the bound control, the control finds it.
It seems that the master page is parsing its ContentPlaceHolders in
arbitrary order. I don't know if this is by design or a bug in ASP.NET
beta 2, but if anyone has more info, insight, workarounds, etc. it
would be much appreciated.
