Question

I have asked this question on Telerik forums with no reply so I’m turing to you.

I have seen this topic come up before but without an answer so I thought I’d define the problem as simply as possible.

I have a LINQ command creating a query:

var gridData = from au in dc.aspnet_Users
join aur in dc.aspnet_UsersInRoles
on au.UserId equals aur.UserId
join ar in dc.aspnet_Roles
on aur.RoleId equals ar.RoleId
join am in dc.aspnet_Memberships
on au.UserId equals am.UserId
select new
{
au.UserName,
ar.RoleName,
am.Email,
am.IsApproved,
am.IsLockedOut
};

THE IMPORTANT POINT IS THAT THIS USES MORE THAN 1 TABLE.

Note: This is accessing the Roles and Users tables using the standard ASP.NET Membership framework.

Then I have a simple RadGrid:

<MasterTableView EditMode="InPlace"> 
   <RowIndicatorColumn> 
         <HeaderStyle Width="20px"></HeaderStyle> 
   </RowIndicatorColumn> 
   <ExpandCollapseColumn> 
         <HeaderStyle Width="20px"></HeaderStyle> 
   </ExpandCollapseColumn> 
</MasterTableView> 

Finally I bind the data to the grid in Page_Load

    rgUsers.AutoGenerateColumns = true; 
    rgUsers.DataSource = gridData.ToList(); 
    rgUsers.DataBind(); 
    rgUsers.EditIndexes.Add(1); 
    rgUsers.DataBind(); 

    GridView1.AutoGenerateColumns = true; 
    GridView1.DataSource = gridData.ToList(); 
    GridView1.DataBind(); 
    GridView1.EditIndex=1;         
    GridView1.DataBind(); 

This will display the data from the 4 tables correctly.

I included a GridView to compare functionality.

I also put the grid into Edit mode programatically to make sure that this was not just a problem with the Edit button.

However, when in Edit mode the RadGrid fields are not editable.

I have tried the following:

1) 1) I can use a LinqDataSource that allows Edit/Update BUT only if there is only 1 table in the LINQ query.

2) 2) I can use a ObjectDataSource onto a dataset but once again this only works if the the dataset adaptor is accessing a single table.

I have looked at the variouse suggested demos and example code but they have all ignored the multiple table/Join problem:

http://www.telerik.com/community/code-library/aspnet-ajax/grid/automatic-operations-with-linqdatasource.aspx

demos.telerik.com/aspnet-ajax/grid/examples/dataediting/threelevel/defaultcs.aspx

http://www.telerik.com/community/code-library/aspnet-ajax/grid/automatic-operations-with-linqdatasource.aspx

I am not wedded to LINQ. I am quite happy to adapt in order to get a RadGrid that can support Update and Edit to multiple tables.

What should I do to achieve a RadGrid that displays records composed from multiple tables with Update and Edit available?

Thanks for any help
Richard

Answer 1

Turns out that the LINQ query returns an anonymous type that is read only.

I replaced it with a SQLDataSource using stored procedures so it works now.

Thanks