When I edit an entry in the time entry gridview and click on save image button to update the entry, I get:

ObjectDataSource 'ProjectListDataSource' could not find a non-generic method 'UpdateTimeEntry' that has parameters: CategoryName, Duration, ReportedDate, LogDate, UserName, ProjectName, Description, Id.

I don't know where it is getting the ProjectName parameter for updating. The Update method does not list a ProjectName either. This is the Datasource:

ID="ProjectListDataSource"

TypeName="ASPNET.StarterKit.BusinessLogicLayer.TimeEntry"

DeleteMethod="DeleteTimeEntry"

OldValuesParameterFormatString="{0}">

<DeleteParameters>

<asp:Parameter Name="Id" Type="Int32" />

</DeleteParameters>

<SelectParameters>

<asp:ControlParameter Name="userName" ControlID="UserList" PropertyName="SelectedValue"

Type="String" />

<asp:ControlParameter Name="startingDate" ControlID="WeekEnding2" PropertyName="Text"

Type="DateTime" />

<asp:ControlParameter Name="endDate" ControlID="WeekEnding2" PropertyName="Text"

Type="DateTime" />

</SelectParameters>

<UpdateParameters>

<asp:Parameter Name="Id" Type="Int32" />

<asp:Parameter Name="CategoryName" Type="String" />

<asp:Parameter Name="Duration" Type="Decimal" />

<asp:Parameter Name="ReportedDate" Type="DateTime" />

<asp:Parameter Name="LogDate" Type="string" />

<asp:ControlParameter Name="UserName" ControlID="UserList" PropertyName="SelectedValue" Type="String" />

</UpdateParameters>

</asp:ObjectDataSource>

Yes you are right

You have to overload UpdateTimeEntry()