Create Dynamic Code using Sql procedure in C#

We can create the dynamic codes using sql as follows(This is contribution by Santh Soft System)

Create PROCEDURE usp_getCode

(

@objName nvarchar(100)

)

AS

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