在本文中，将介绍如何在存储过程中使用 output 关键字。
首先创建一个表
create table login(uIdd varchar(15),uPwdd varchar(15))
插入数据
insert into login select 'admin','admin'union all select 'user','user'
创建存储过程：
create proc usp_select(@id varchar(15) output,@pwd varchar(15)) as select * from login where jack@onitroad and jack@onitroad
执行存储过程
exec usp_select 'user','user'
现在在网页中编写以下源代码。
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="page1.aspx.cs" Inherits="page1" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <table> <tr><td>click here to get username</td><td><asp:Button ID="btn1" Text="get user Id" runat="server" OnClick="btn1_Click" /></td></tr> <tr><td> </td><td><asp:Label ID="lbl1" runat="server"></asp:Label></td></tr> </table> </div> </form> </body> </html>
现在在Web页面中写下以下源代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
public partial class page1 : System.Web.UI.Page
{
SqlConnection con = new SqlConnection("server=.;database=outputsp; user id=sa;pwd=wintellect");
SqlCommand cmd;
protected void Page_Load(object sender, EventArgs e)
{
con.Open();
Response.Write("ya");
con.Close();
}
protected void btn1_Click(object sender, EventArgs e)
{
string str="admin";
cmd = new SqlCommand("usp_select", con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@id", str);
cmd.Parameters.AddWithValue("@pwd", str);
con.Open();
cmd.ExecuteNonQuery();
cmd.Parameters.Add("@id", SqlDbType.Char, 500);
cmd.Parameters["@id"].Direction = ParameterDirection.Output;
string userName = (string)cmd.Parameters["@id"].Value;
lbl1.Text = userName;
}
}
日期：2020-06-02 22:18:12 来源：oir作者：oir