Posts Tagged ‘Stored procedure’

Ever got fed up with creating all the code behind parameters for your stored procedures? I have. So, I wrote this stored proc to generate the C# code for me. 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 “usp_getCode”.

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 usp_getCode ‘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 “usp_getCode” 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 usp_getCode
(
@objName nvarchar(100)
)
AS
/*
___________________________________________________________________
Name: CS SPROC Builder
Version: 1
Date: 07/30/2010
Author: Shabbir
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”.

Version: 1.1
Date: 07/30/2010
Author: Shabbir
Description: a) Updated to include ‘UniqueIdentifier’ Data Type
b) Support for ‘ParameterDirection.Output’

*/
SET NOCOUNT ON
DECLARE @parameterCount int
DECLARE @errMsg varchar(100)
DECLARE @parameterAt varchar(1)
DECLARE @connName varchar(100)
DECLARE @outputValues varchar(100)
–Change the following variable to the name of your connection instance
SET @connName=’conn.Connection’
SET @parameterAt=”
SET @outputValues=”
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.syscolumns.isoutparam AS ColIsOut,
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), @col_isout tinyint

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_isout,@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 36 THEN ‘UniqueIdentifier’
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
+ ‘);’

–Write out the parameter direction it is output
IF(@col_isout=1)
BEGIN
PRINT ‘ paramsToStore[‘+ cast(@col_order-1 as varchar) +’].Direction=ParameterDirection.Output;’
SET @outputValues=@outputValues+’ ‘ +REPLACE(@col_name,’@’,”) +’=paramsToStore[‘+ cast(@col_order-1 as varchar) +’].Value;’
END
ELSE
BEGIN
–Write out the parameter value line
PRINT ‘ paramsToStore[‘+ cast(@col_order-1 as varchar) + ‘].Value = ‘+ REPLACE(@col_name,’@’,”) +’;’
END
–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

— 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_isout,@col_xtype
END
PRINT ”
PRINT ‘ SqlHelper.ExecuteNonQuery(‘ + @connName + ‘, CommandType.StoredProcedure,”‘ + @objName + ‘”, paramsToStore);’
PRINT @outputValues
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

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!).

ENJOY……

Cheers!!!!!

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