Memos of my LinqDatasource experience

How to group by more than 1 table column (attribute, property)?

GroupBy="new(Roles.RoleName, Roles.RoleId)" Access with: Key.RoleName, (for example in your listview or gridview)

<asp:LinqDataSource runat="server" ID="ldsUsers"
   ContextTypeName="MyPrivateProject.Test.DataAccess.MyPersonalPrivateDataContext"
   TableName="Users"
   GroupBy="new(Roles.RoleName, Roles.RoleId)"
   OrderGroupsBy="Key.RoleName"
   OrderBy="UserName, Lastname, Firstname"
   Select="new(Key, Count() As RecordCount, It As Users)"  >
</asp:LinqDataSource>

How to use Guids in LinqDataSource where Parameters?

Use DbType="Guid" instead of Type="xxx". TODO: Check input param! e.g. MyPage.aspx?UserIdInput=xxxasd-grrrr-blabla-TEXT-FFAILS --> throws an error

<asp:LinqDataSource runat="server" ID="ldsUsers"
   ContextTypeName="MyPrivateProject.Test.DataAccess.MyPersonalPrivateDataContext"
   TableName="Users"
   Where="UserId = @UserIdInput" EnableUpdate="True">
     <WhereParameters>
          <asp:QueryStringParameter
                 DefaultValue="none" Name="UserIdInput"
                 QueryStringField="UserId" 
              DbType="Guid"  />
     </WhereParameters>
</asp:LinqDataSource>

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