GridView inline Master/Detail record display

See more:

ASP.NET

Gridview

Conversion failed when converting from a character string to uniqueidentifier.

------------------------------------------------------------------
Inserted a suggested correction to handle the 'uniqueidentifier' problem and got an error:

Parser Error Message: The server tag is not well formed.
and a compiler error:
the "+Guid.Empty.ToString()+" as UserId,

This portion of the line as a red underline commented.

Valuation (asp.net): The attribute must be followed by an equal sign (=) and a value. if the value is in quotation marks, the quotation marks must match.