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Object cannot be cast from DBNull to other types.

Posted on 2009-05-12
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Last Modified: 2012-06-21
// Insert into tbl_index_pocs
                ItemCreatedResult res1 = new ItemCreatedResult();

                string sql1 = "sprInsertIntoIndexTicketPOCs";
                DbCommand cmd1 = db.GetStoredProcCommand(sql1);
                db.AddInParameter(cmd1, "@TicketID", DbType.Int32, res.ItemID);
                db.AddInParameter(cmd1, "@POCID",    DbType.Int32, Convert.ToInt32(strPOCString));
               
                db.AddInParameter(cmd1, "@DateAdded", DbType.DateTime, ticket.DateCreated);
                db.AddInParameter(cmd1, "@AgentAdded", DbType.String, ticket.AgentCreated);
                db.AddInParameter(cmd1, "@DateCreated", DbType.DateTime, ticket.DateCreated);
           
                db.AddOutParameter(cmd1, "@ticketPOCIndexID", DbType.Int32, 4);
                db.AddOutParameter(cmd1, "@resultCode", DbType.Int32, 4);
                db.AddOutParameter(cmd1, "@resultMessage", DbType.String, 200);
                db.ExecuteNonQuery(cmd1);


                res1.Code = Convert.ToInt32(db.GetParameterValue(cmd1, "resultCode"));===>??
                res1.Message = db.GetParameterValue(cmd1, "resultMessage").ToString();
                res1.ItemID = Convert.ToInt32(db.GetParameterValue(cmd1, "TicketID"));



???problem here.

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
 
ALTER PROCEDURE [dbo].[sprInsertIntoIndexTicketPOCs]
( 
     @TicketID INT = null,
     @POCID INT = null, 
     @DateAdded DATETIME = null,
     @AgentAdded NVARCHAR(50) = null,
     @DateCreated DATETIME,
     @ticketPOCIndexID INT = null OUTPUT,
     @resultCode INT OUTPUT,
     @resultMessage NVARCHAR(200) OUTPUT
)
 AS  
 BEGIN  
         SET NOCOUNT ON
         INSERT INTO [tbl_index_ticket_pocs]
         (
                 [TicketID],
                 [POCID],
                 [DateAdded],
                 [AgentAdded],
                 [DateCreated]
         )
         VALUES
         (
                 @TicketID,
                 @POCID,
                 @DateAdded,
                 @AgentAdded,
                 @DateCreated
         )
         SET @ticketPOCIndexID=SCOPE_IDENTITY()
 END
I change it to now
-----------------------------------------------------------------------------------
-- ===========================================================================
-- Author:		Mathieu Cupryk
-- Create date: 05/06/2009
-- Description:	Insert Into IndexTicketsPOCs table
-- ===========================================================================
set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
go
 
ALTER PROCEDURE [dbo].[sprInsertIntoIndexTicketPOCs]
( 
     @TicketID INT = null,
     @POCID INT = null, 
     @DateAdded DATETIME = null,
     @AgentAdded NVARCHAR(50) = null,
     @DateCreated DATETIME,
     @ticketPOCIndexID INT = null OUTPUT,
     @resultCode INT OUTPUT,
     @resultMessage NVARCHAR(200) OUTPUT
)
 AS  
 BEGIN  
         SET NOCOUNT ON
         INSERT INTO [tbl_index_ticket_pocs]
         (
                 [TicketID],
                 [POCID],
                 [DateAdded],
                 [AgentAdded],
                 [DateCreated]
         )
         VALUES
         (
                 @TicketID,
                 @POCID,
                 @DateAdded,
                 @AgentAdded,
                 @DateCreated
         )
         SET @ticketPOCIndexID=SCOPE_IDENTITY()
         
	 SET @resultCode = 0
         SET @resultMessage = 'ticketPOCIndexID ' + CAST(@ticketPOCIndexID  AS NVARCHAR(200)) + ': ' + @ticketPOCIndexID  + ' was created.'
 END     
GO

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Question by:mathieu_cupryk
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4 Comments
 
LVL 75

Expert Comment

by:Aneesh Retnakaran
ID: 24369608
What exactly is the logic behind @resultCode and    @resultMessage  in the stored procedure ?
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Author Comment

by:mathieu_cupryk
ID: 24369628
Conversion failed when converting the nvarchar value 'ticketPOCIndexID 5085: ' to data type int.
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LVL 75

Accepted Solution

by:
Aneesh Retnakaran earned 500 total points
ID: 24369658


SET @resultMessage = 'ticketPOCIndexID ' + CAST(@ticketPOCIndexID  AS NVARCHAR(200)) + ': ' +  CAST(  @ticketPOCIndexID as nvarchar(100) )   + ' was created.'
0
 
LVL 11

Expert Comment

by:Muhammad Ousama Ghazali
ID: 24369882

SET @resultMessage = 'ticketPOCIndexID ' + CONVERT(NVARCHAR(200), @ticketPOCIndexID) + ': ' + CONVERT(NVARCHAR(200), @ticketPOCIndexID)  + ' was created.'

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