How to log DLinq's Sql commands

by Miha Markič 16. September 2005 20:56

There was a question on MS' forum about how to log the DLinq's sql commands. Well, actually DataContext's sql commands. Here is the solution, it is easy:

StringBuilder sb = new StringBuilder();   // create a StringBuilder instance to store output
TextWriter tw = new StringWriter(sb);     // create a StringWriter that will write into StringBuilder above
db.Log = tw;                              // attach it to DataContext
Console.WriteLine(sb.ToString());         // output the result

The trick is to use DataContext.Log property (db represents DataContext instance in this example) to attach a valid TextWritter derived instance. And voila - no more black box. Of course, output will be empty unless there is a sql command issued either by doing query or persistence.

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Miha Markic

About me
Righthand
 
Microsoft MVP
 
Developer Express' DXSquad
INETA Country Leader for Slovenia
INETA Country Leader for Slovenia

Slovene Developer Users Group Lead
Friends of Red-Gate
LLBLGenPro Partner

Miha currently works as a free lance consultant and software developer specialized in .net area.
He graduated in Computer and information science at the University of Ljubljana, Slovenia. He has accumulated experience in various programming languages such as Java, Visual Basic 3-6 (MCP), Visual C++, Delphi, C# and VB.Net through years.
He has experience in practically all (technical) stages of project development, including planning, framework development, user interface, business processes, as well as testing and documenting. He has worked on big and small projects in Slovenia and abroad (e.g. participated in completing level 3 IS for the Nucor steel plant, Hertford, USA).
Currently he enjoys programming in .net environment using C#. Since 2000 he has been active in Developer Express' DX Squad and has been ECDL trainer and tester. He also gives lectures on conferences and other events in Slovenia.

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