使用Data Access Application Block 得到存储过程的返回值
今天有位朋友问我如何在Data access application Block中 得到 存储 的 过程 的 返回 值,我才发现自己以前写的文章中确实没提到这方面的问题,现在来补充一下,具体的解决方法如下: 1、首先建立一个具有 返回 值的 存储 过程 ,作为示例,我就简单的建一个 存
今天有位朋友问我如何在Data access application Block中得到存储的过程的返回值,我才发现自己以前写的文章中确实没提到这方面的问题,现在来补充一下,具体的解决方法如下:
1、首先建立一个具有返回值的存储过程,作为示例,我就简单的建一个存储过程,如下:
create PRoc test
(
@id int
)
as
declare @flag int
select * from person where id=@id
if @@rowcount > 0
set @flag=1
else
set @flag=0
return @flag
我们要在程序中获得这个返回值的方法如下:
[TestMethod]
public void TestReturnValue()
{
Database db = DatabaseFactory.CreateDatabase();
DbCommand dbcomm = db.GetStoredProcCommand("test");
db.AddInParameter(dbcomm, "@id", DbType.Int32,1);
//关键在这里,添加一个参数,类型为ReturnValue
db.AddParameter(dbcomm, "@RETURN_VALUE", DbType.String, ParameterDirection.ReturnValue, "", DataRowVersion.Current, null);
db.ExecuteNonQuery(dbcomm);
int testvalue = (int)dbcomm.Parameters["@RETURN_VALUE"].Value;
Assert.AreEqual(testvalue, 1);
}
通过上面的代码我们就能够在程序中获得存储过程的返回值了。
以前写的文章可能还有很多地方没说到,希望能有更多的朋友提意见,谢谢!
http://pw.cnblogs.com/archive/2006/06/19/429455.html

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