I have a query which I am passing byte[] as a parameter. I am trying to get the SQL query out of it and run that query in management studio to debug. How can I extract the SQL statement from it?
committeeMember =
db.Committee_Member.FirstOrDefault(x => x.Customer_Number == activity.Contact.Number
&& x.Position_Start_Date.Value.Year == activity.EndDate
&& x.Committee_Id == activity.Committee.Id && x.Cancelled != 1);
In debugger hover mouse over commiteeMember variable - it will show generated SQL query:
This is what ToString() returns for query. You can get same generated SQL query manually by calling ToString:
string sql = committeeMember.ToString();
This overridden method internally calls ObjectQuery.ToTraceString() which returns commands that will run on data source.
Also you can use SQL Profiler or Entity Framework Profiler to see which SQL query was executed.
Incidentally, LINQ to SQL is not entity framework. If the former, you can set [yourDataContext].Log = Console.Out (or some other stream writer) and get the query.
In the query you have, consider writing it as follows to be able to do the ToString trick:
var committeeMemberQuery =
db.Committee_Member.*WHERE*
(x =>
x.Customer_Number == activity.Contact.Number
&& x.Position_Start_Date.Value.Year == activity.EndDate
&& x.Committee_Id == activity.Committee.Id && x.Cancelled != 1
);
var committeeMember = committeeMemberQuery.FirstOrDefault();
Now you can do committeeMemberQuery.ToString() however you will not get parameter info (you will with DataContext.Log = Console.Out but again, that's not Entity Framework, it's LINQ to SQL.
DataContext.SubmitChanges.
FirstOrDefault call, it's been pulled out into a Where call. There's no way to add additional formatting to code, AFAICTSee https://learn.microsoft.com/en-us/dotnet/framework/data/adonet/sql/linq/how-to-display-linq-to-sql-commands for another approach to extract SQL command from linq.
More precisely, the following snippet shows the use case
Northwnd db = new Northwnd(@"c:\northwnd.mdf");
var q =
from cust in db.Customers
where cust.City == "London"
select cust;
DbCommand dc = db.GetCommand(q);
Console.WriteLine("\nCommand Text: \n{0}",dc.CommandText);
Console.WriteLine("\nCommand Type: {0}",dc.CommandType);
Console.WriteLine("\nConnection: {0}",dc.Connection);
Console.ReadLine();
Gives an ouput
Command Text:
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
Command Type: Text
Connection: System.Data.SqlClient.SqlConnection
I know this is old, but for anyone using VS2022: In debug mode...
Step 1: Set a breakpoint at the statement that comes after the query.
Step 2: When your debug mode hits the breakpoint, hover over the variable which the query inserts values to. A gray box will show up with the object data. You can click the little triangle for more options.
Step 3: Look at the dropdown for Debug view and you can simply just view the query.
That's it! You can copy and paste that query into SSMS and run it on your database to see what the result should be, just be sure to refresh your database first if you are editing data in your test or method when you hit the breakpoint.
