linq to sql - stored procedure - webservice

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A c# solution with 3 projects:
1. linq-to-sql Business Layer.
2. Web Service layer.
3. Normal proxy, web consumer fromnt end with all my UI.

Problem:
I cannot get an nvarchar value from my stored procedure that I can use in the code.

The Procedure:

SQL

ALTER PROCEDURE [dbo].[spGetLocked]
	-- Add the parameters for the stored procedure here
	@appid varchar(10),
	@examcode varchar(10)
AS

BEGIN
	-- SET NOCOUNT ON added to prevent extra result sets from
	-- interfering with SELECT statements.
	SET NOCOUNT ON;

    -- Insert statements for procedure here
	SELECT record_lock 
	FROM user_result
	WHERE appid = @appid and exam_id = @examcode
	
	RETURN
	
END

The code built in the designer:

C#

[global::System.Data.Linq.Mapping.FunctionAttribute(Name="dbo.spGetLocked")]
		public ISingleResult<spgetlockedresult> spGetLocked([global::System.Data.Linq.Mapping.ParameterAttribute(DbType="VarChar(10)")] string appid, [global::System.Data.Linq.Mapping.ParameterAttribute(DbType="VarChar(10)")] string examcode)
		{
			IExecuteResult result = this.ExecuteMethodCall(this, ((MethodInfo)(MethodInfo.GetCurrentMethod())), appid, examcode);
			return ((ISingleResult<spgetlockedresult>)(result.ReturnValue));
		}

My attempt at calling the procedure:

C#

ExamBusiness.ExamsDataContext db = new ExamBusiness.ExamsDataContext();

string recLock = db.spGetLocked(appid, examid).

return recLock;

I am trying to get the value of field record_lock (T or F) nvarchar(1) for a business decision in my check_login code.

Please help, I have been stuck for 10 straight hours.

Thank you,
Suzanne

Posted 7-Dec-12 8:37am

Suzanne Jarrett

Updated 7-Dec-12 8:45am

RaisKazi

v3

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Comments

Zoltán Zörgő 7-Dec-12 15:41pm

And what is the exact issue? Any error code?

1 solution

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Rohit Shrivastava · Answer 1 · 2012-12-07T10:05:00

I assume following code need to be replaced:

VB

ExamBusiness.ExamsDataContext db = new ExamBusiness.ExamsDataContext();

string recLock = db.spGetLocked(appid, examid).

return recLock;

To

VB

ExamBusiness.ExamsDataContext db = new ExamBusiness.ExamsDataContext();

ISingleResult<spgetlockedresult> result = db.spGetLocked(appid, examid);

//Check result.FirstOrDefault for not null 
string recLock = result.FirstOrDefault().record_lock; 

return recLock;</spgetlockedresult>

Please refer http://msdn.microsoft.com/en-us/library/bb534556.aspx[^]