Question

I have the following code:

ServiceSoapClient service = new ServiceSoapClient();
    var dataSource = (from u in _db.Sessions
                      where u.DeletedOn == null
                      select new
                      {
                          SessionId = u.UploadSessionId,
                          FileName = u.FileName,
                          CreatedBy = u.User.UserName,
                          Partner = u.Company.Name,
                          CreatedOn = u.CreatedOn,
                          Visible = service.IsSessionProcessing(u.UploadSessionId)
                      })
                    .OrderByDescending(x => x.CreatedOn);

…of course the problem here is the Visible = service.IsSessionProcessing(u.UploadSessionId) portion that has access to modified closure because the expression is actually calculated when I use dataSource somewhere i.e preform .ToList() or something similar.

The problem here is that I can’t perform .ToList() immediately because I need to use it as a data source for a control as it is.

Is there any way to avoid this in Linq? Can I use a local variable in the expression itself so that it gets calculated with the real values?

Answer 1

The “modified closure” here is service. So… don’t reassign service.