存储过程[存储过程]
CREATE PROCEDURE Test_procedure cid int ,y int, n varchar(10) output
AS
select * from city where cid=cid
if y=1
begin
set n = '成功!'
return 0
end
else
begin
set n = '失败!'
return -1
end
GO
[程序中调用存储过程]
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim conn As OleDbConnection
Try
conn = New OleDbConnection("provider=sqloledb;data source=localhost;user id=sa;password=;initial catalog=jiang")
Dim cmd As New OleDbCommand(" {? = call Test_procedure(?,?,?)}", conn)
conn.Open()
With cmd
.CommandType = CommandType.Text ‘这句可以省略,因为是默认设置,但这里还是显式地写出以引起注意
.Parameters.Add("retval", OleDbType.Integer)
.Parameters.Add("cid", OleDbType.Integer)
.Parameters.Add("y", OleDbType.Integer)
.Parameters.Add("n", OleDbType.VarChar, 10)
.Parameters("n").Direction = ParameterDirection.Output
.Parameters("retval").Direction = ParameterDirection.ReturnValue
.Parameters("cid").Value = 1
.Parameters("y").Value = 1
.ExecuteNonQuery()
MessageBox.Show(.Parameters("n").Value) ‘测试结果为“成功!”
End With
Catch ex As Exception
MessageBox.Show(ex.ToString)
Finally
conn.Close()
End Try
End Sub
在.net中调用存储过程的另一种方法
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