asp.net 4.5 练习~test16-3 webservice从数据库取数据

webservice1.asmx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Data.SqlClient;

namespace test16_3
{
    /// <summary>
    /// WebService1 的摘要说明
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消注释以下行。 
    // [System.Web.Script.Services.ScriptService]
    public class WebService1 : System.Web.Services.WebService
    {

        [WebMethod]
        public System.Data.DataSet GetQuery()
        {
            string connectionString = @"Data Source=LAPTOP-AQKEN65V\SQLEXPRESS08;Initial Catalog=db_news;User ID=sa;Password=123456;";
            SqlConnection myCon = new SqlConnection(connectionString);
            myCon.Open();

            SqlCommand myCmd = new SqlCommand("select * from tb_news", myCon);
            SqlDataAdapter adapter = new SqlDataAdapter(myCmd);
            System.Data.DataSet myDs = new System.Data.DataSet();
            adapter.Fill(myDs);
            myCon.Close();
            return myDs;

        }

         [WebMethod]
         public string HelloWorld()
        {
            return "Hello World";
        }
    }
}

webform1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="test16_3.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h3>获取数据库信息</h3>
        <asp:Button ID="Button1" runat="server" Text="获取" OnClick="Button1_Click" />
        <asp:GridView ID="GridView1" runat="server"></asp:GridView>
    </div>
    </form>
</body>
</html>

webform1.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace test16_3
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            localhost.WebService1 service1 = new localhost.WebService1();
            System.Data.DataSet ds = service1.GetQuery();
            GridView1.DataSource = ds;
            GridView1.DataBind();

        }
    }
}

注意，在添加服务引用时，引用名是默认的localhost，如果你的名称不一样，请在代码中替换。

asp.net 4.5 练习~test16-3 webservice从数据库取数据

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