How to: Display Generated SQL

You can view the SQL code generated for queries and change processing by using the Log property. This approach can be useful for understanding LINQ to SQL functionality and for debugging specific problems.

Example

The following example uses the Log property to display SQL code in the console window before the code is executed. You can use this property with query, insert, update, and delete commands.

The lines from the console window are what you see when you execute the Visual Basic or C# code that follows.

SELECT [t0].[CustomerID], [t0].[CompanyName], [t0].[ContactName], [t0].[ContactT  
itle], [t0].[Address], [t0].[City], [t0].[Region], [t0].[PostalCode], [t0].[Coun  
try], [t0].[Phone], [t0].[Fax]  
FROM [dbo].[Customers] AS [t0]  
WHERE [t0].[City] = @p0  
-- @p0: Input String (Size = 6; Prec = 0; Scale = 0) [London]  
-- Context: SqlProvider(Sql2005) Model: AttributedMetaModel Build: 3.5.20810.0  

AROUT  
BSBEV  
CONSH  
EASTC  
NORTS  
SEVES  

db.Log = Console.Out;
IQueryable<Customer> custQuery =
    from cust in db.Customers
    where cust.City == "London"
    select cust;

foreach(Customer custObj in custQuery)
{
    Console.WriteLine(custObj.CustomerID);
}

db.Log = Console.Out
Dim custQuery = _
    From cust In db.Customers _
    Where cust.City = "London" _
    Select cust

For Each custObj In custQuery
    Console.WriteLine(custObj.CustomerID)
Next

See also

• Debugging Support