Custom Expression in Linq-to-Sql Designer
- by csharpnoob
According to Microsoft:
http://msdn.microsoft.com/de-de/library/system.data.linq.mapping.columnattribute.expression.aspx
It's possible to add expression to the Linq-to-SQL Mapping.
But how to configure or add them in Visual Studio in the Designer?
Problem, when I add it manual to thex XYZ.designer.cs it on change it will be lost.
//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
// Runtime Version:2.0.50727.4927
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
This is generated:
[Column(Name="id", Storage="_id", DbType="Int")]
public System.Nullable<int> id
{
...
But i need something like this
[Column(Name="id", Storage="_id", DbType="Int", Expression="Max(id)")]
public System.Nullable<int> id
{
...
Thanks.
