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Asked: 2026-05-11T07:58:16+00:00

I have this following data source binding: MembershipProvider provider = new MembershipProvider(); UserUpdateLogs userUpdateLogs

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I have this following data source binding:

MembershipProvider provider = new MembershipProvider(); UserUpdateLogs userUpdateLogs = provider.GetUserUpdateLogs(username);  dgUserUpdateLog.DataSource = userUpdateLogs.Logs; dgUserUpdateLog.DataBind();

Logs is a collection of UserUpdateLogEntry. This class owns the UserData Property, and UserData contains other properties. My aspx:

<Columns> <asp:BoundColumn DataField='ChangeDate' Visible='true' HeaderText='Date'/> <asp:BoundColumn DataField='UserData.Sex' HeaderText='Sex' /> <asp:BoundColumn DataField='UserData.Phone' HeaderText='Phone' /> </Columns>

The first row (ChangeDate) seems to work well. But when rendering the second BoundColumn, the following error is shown:

A field or property with the name ‘UserData.Sex’ was not found on the selected data source.

Why does it happen? Can’t Aspx recognize a concatenation of properties like PropertyA.PropertyB?

I’ve checked the object and all properties have valid data.

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1 Answer

  1. You can not bind to properties of sub-objects in that way.

    As an alternative, you can use a template column and use Eval to display the properties of the sub-object, e.g. something like this:

    <asp:TemplateColumn HeaderText='Sex' Visible='true'>   <ItemTemplate>     <asp:Literal runat='server' Text='<%# Eval('UserData.Sex') %>' />    </ItemTemplate> </asp:TemplateColumn> <asp:TemplateColumn HeaderText='Phone' Visible='true'>   <ItemTemplate>     <asp:Literal runat='server' Text='<%# Eval('UserData.Phone') %>' />    </ItemTemplate> </asp:TemplateColumn>
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