程式師世界 >> 編程語言 >> C語言 >> 關於C語言 >> 根據存儲過程名字生成ADO.NET數據庫訪問代碼（1）

根據存儲過程名字生成ADO.NET數據庫訪問代碼（1）

編輯：關於C語言

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER　 PROCEDURE [dbo].[sqltoolforexcuteandadapter]
(
@objName nvarchar(100),--存儲過程名稱
@isexcute int --是否為execute 或者是sqladapter　0是execute,1是sqladapter
)
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) --不理解這個不等於1是干嘛的？在sql幫助中也沒有啊？
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 'SqlConnection conn = new SqlConnection("");
SqlCommand com = new SqlCommand("'+@objName+'", conn);'
print 'com.CommandType = CommandType.StoredProcedure;'
PRINT '　 SqlParameter[] Parameters = 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 '　 Parameters[' + 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 '　 Parameters['+ cast(@col_order-1
as varchar)
+'].Direction=ParameterDirection.Output;'
SET @outputValues=@outputValues+'　
?Parameters['+cast(@col_order-1 as varchar) +'].Value;'
END
ELSE
BEGIN
--Write out the parameter value line
PRINT '　 Parameters['+ cast(@col_order-1
as varchar) + '].Value = ?;'
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 '　 Parameters[' + 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 '　　　 com.Parameters.AddRange(Parameters);'
if　　　@isexcute = 0 --使用的execute方法執行sql語句
begin
print 'try
{
conn.Open();
com.ExecuteNonQuery();
}
catch (Exception ee)
{
throw ee;
}
finally
{
conn.Close();
}'
end
else if @isexcute = 1--需要返回數據集的話使用這個
begin
print 'try
{
da.Fill(ds);
}
catch (Exception ee)
{
throw ee;
}
finally
{
//do what you want to do or dispose resoures.
}'
end
CLOSE cur
DEALLOCATE cur
END
if(LEN(@errMsg)>0) PRINT @errMsg
DROP TABLE #t_obj
SET NOCOUNT ON