C# Code Generator for Stored Procedures

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Introduction

Ever got fed up with creating all the code behind parameters for your stored procedures? I have. So, I wrote this stored proc to do the code for me. (I love code that writes code). This has been written for use with "Microsoft Data Application Block" (SQLHelper.cs), however it could be hacked around to write the code without using the MDAB or even to write the code in VB. The script handles both input and output parameters, setting the size of text types, and you could even use it for direct access to a view or table.

Using the code

To implement, just copy the code into Query Analyzer and run. This will create a SPROC called "tools_CS_SPROC_Builder".

To use, just execute the SPROC passing the name of the SPROC you want the code for (see below). Note: don't include any owner prefix, e.g.: (dbo.).

EXEC tools_CS_SPROC_Builder 'mySprocsNameHere'

The message window in the Query Analyzer will write out all the code required for your class or code behind. There is a variable in "tools_CS_SPROC_Builder" called "@connName" which you can set to the name of your connection instance. By default, it's set to "conn.Connection" - just alter this for your own project's naming convention.

The code

CREATE     PROCEDURE tools_CS_SPROC_Builder
(
@objName nvarchar(100)
)
AS
/*
___________________________________________________________________
Name:  CS SPROC Builder
Version: 1
Date:  10/09/2004
Author:  Paul McKenzie
Description: Call this stored procedue passing the name of your 
  database object that you wish to insert/update
  from .NET (C#) and the code returns code to copy
  and paste into your application.  This version is
  for use with "Microsoft Data Application Block".
  
  
*/
SET NOCOUNT ON

DECLARE @parameterCount int
DECLARE @errMsg varchar(100)
DECLARE @parameterAt varchar(1)
DECLARE @connName varchar(100)
//Change the following variable to the name of your connection instance
SET @connName='conn.Connection'
SET @parameterAt=''
  
SELECT 
 dbo.sysobjects.name AS ObjName, 
 dbo.sysobjects.xtype AS ObjType,
 dbo.syscolumns.name AS ColName, 
 dbo.syscolumns.colorder AS ColOrder, 
 dbo.syscolumns.length AS ColLen, 
 dbo.syscolumns.colstat AS ColKey, 
 dbo.systypes.xtype
INTO #t_obj
FROM         
 dbo.syscolumns INNER JOIN
 dbo.sysobjects ON dbo.syscolumns.id = dbo.sysobjects.id INNER JOIN
 dbo.systypes ON dbo.syscolumns.xtype = dbo.systypes.xtype
WHERE     
 (dbo.sysobjects.name = @objName) 
 AND 
 (dbo.systypes.status <> 1) 
ORDER BY 
 dbo.sysobjects.name, 
 dbo.syscolumns.colorder

SET @parameterCount=(SELECT count(*) FROM #t_obj)

IF(@parameterCount<1) SET @errMsg='No Parameters/Fields found for ' + @objName

IF(@errMsg is null)
 BEGIN
  PRINT 'try'
  PRINT '   {'
  PRINT '   SqlParameter[] paramsToStore = 
new SqlParameter[' + cast(@parameterCount as varchar) + '];'
  PRINT ''
  
  DECLARE @source_name nvarchar,@source_type varchar,
    @col_name nvarchar(100),@col_order int,@col_type varchar(20),
    @col_len int,@col_key int,@col_xtype int,@col_redef varchar(20)
 
  DECLARE cur CURSOR FOR
  SELECT * FROM #t_obj
  OPEN cur
  -- Perform the first fetch.
  FETCH NEXT FROM cur
  INTO @source_name,@source_type,@col_name,@col_order,
    @col_len,@col_key,@col_xtype
 
  if(@source_type=N'U') SET @parameterAt='@'
  -- Check @@FETCH_STATUS to see if there are any more rows to fetch.
  WHILE @@FETCH_STATUS = 0
  BEGIN
   SET @col_redef=(SELECT 
      CASE @col_xtype
    WHEN 34 THEN 'Image'
    WHEN 35 THEN 'Text'
    WHEN 48 THEN 'TinyInt'
    WHEN 52 THEN 'SmallInt'
    WHEN 56 THEN 'Int'
    WHEN 58 THEN 'SmallDateTime'
    WHEN 59 THEN 'Real'
    WHEN 60 THEN 'Money'
    WHEN 61 THEN 'DateTime'
    WHEN 62 THEN 'Float'
    WHEN 99 THEN 'NText'
    WHEN 104 THEN 'Bit'
    WHEN 106 THEN 'Decimal'
    WHEN 122 THEN 'SmallMoney'
    WHEN 127 THEN 'BigInt'
    WHEN 165 THEN 'VarBinary'
    WHEN 167 THEN 'VarChar'
    WHEN 173 THEN 'Binary'
    WHEN 175 THEN 'Char'
    WHEN 231 THEN 'NVarChar'
    WHEN 239 THEN 'NChar'
    ELSE '!MISSING'

      END AS C) 
   --Write out the parameter
   PRINT '   paramsToStore[' + cast(@col_order-1 as varchar) 
    + '] = new SqlParameter("' + @parameterAt + @col_name
    + '", SqlDbType.' + @col_redef
    + ');'

   --If the type is a string then output the size declaration
   IF(@col_xtype=231)OR(@col_xtype=167)OR(@col_xtype=175)
    OR(@col_xtype=99)OR(@col_xtype=35)
    BEGIN
    PRINT '   paramsToStore[' + cast(@col_order-1 as varchar) 
     + '].Size=' + cast(@col_len as varchar) + ';'
    END
   PRINT '   paramsToStore['+ cast(@col_order-1 as varchar) 
    + '].Value =  ;'
      -- This is executed as long as the previous fetch succeeds.
      FETCH NEXT FROM cur
   INTO @source_name,@source_type,@col_name,@col_order,
     @col_len,@col_key,@col_xtype 
  END
  PRINT ''
  PRINT '   SqlHelper.ExecuteNonQuery(' + @connName + 
  ', CommandType.StoredProcedure,"' + @objName + '", paramsToStore);'
  PRINT '   }'
  PRINT 'catch(Exception excp)'
  PRINT '   {'
  PRINT '   }'
  PRINT 'finally'
  PRINT '   {'
  PRINT '   ' + @connName + '.Dispose();'
  PRINT '   ' + @connName + '.Close();'
  PRINT '   }'  
  CLOSE cur
  DEALLOCATE cur
 END

if(LEN(@errMsg)>0) PRINT @errMsg
DROP TABLE #t_obj
SET NOCOUNT ON

GO
SET QUOTED_IDENTIFIER OFF 
GO
SET ANSI_NULLS ON 
GO

Output Example

try
   {
   SqlParameter[] paramsToStore = new SqlParameter[9];
 
   paramsToStore[0] = new SqlParameter("@organisationid", SqlDbType.BigInt);
   paramsToStore[0].Value =  ;
   paramsToStore[1] = new SqlParameter("@DisplayName", SqlDbType.NVarChar);
   paramsToStore[1].Size=100;
   paramsToStore[1].Value =  ;
   paramsToStore[2] = new SqlParameter("@DefaultCurrencyFID", SqlDbType.Int);
   paramsToStore[2].Value =  ;
   paramsToStore[3] = new SqlParameter("@TaxCode", SqlDbType.NVarChar);
   paramsToStore[3].Size=60;
   paramsToStore[3].Value =  ;
   paramsToStore[4] = new SqlParameter("@UserFID", SqlDbType.BigInt);
   paramsToStore[4].Value =  ;
   paramsToStore[5] = new SqlParameter("@IsClient", SqlDbType.Bit);
   paramsToStore[5].Value =  ;
   paramsToStore[6] = new SqlParameter("@IsContractor", SqlDbType.Bit);
   paramsToStore[6].Value =  ;
   paramsToStore[7] = new SqlParameter("@IsSupplier", SqlDbType.Bit);
   paramsToStore[7].Value =  ;
   paramsToStore[8] = new SqlParameter("@IsDesigner", SqlDbType.Bit);
   paramsToStore[8].Value =  ;
 
   SqlHelper.ExecuteNonQuery(conn.Connection, 
CommandType.StoredProcedure,"usp_Insert_Organisation", paramsToStore);
   }
catch(Exception excp)
   {
   }
finally
   {
   conn.Connection.Dispose();
   conn.Connection.Close();
   }

All you then have to do is copy-paste and fill in the values you want to pass and catch any exceptions... (Yes you do have to write some code!).

Points of Interest

In order for me to work out the @col_xtype variable from sysobjects, I ran lots of tests on a table I created with every type variation in both directions. It certainly works fine for all the usual data types, but I haven't had a chance to test all types within .NET, so if you find a bug, let me know. Enjoy!

History

• Feb 20, 2006 - updated the script to version 1.1 which includeds two additions:
  1. UniqueIdentifier data type support.
  2. Support for ParameterDirection.Output.

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