using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace MyWebService

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

         //初始化webservice

        WebReference.WebServiceDemo local_S = new WebReference.WebServiceDemo();

        //调用webservice连接数据库的方法

        private void button1_Click(object sender, EventArgs e)

        {

            if (local_S.testConnect())

            {

                MessageBox.Show("连接成功");

            }

            else

            {

                MessageBox.Show("连接失败");

            }

        }

        private void Form1_Load(object sender, EventArgs e)

        {

        }

        //调用webservice查询数据的方法

        private void button2_Click(object sender, EventArgs e)

        {

            string strsql = "select * from Customer";

            DataSet ds = local_S.GetInfo(strsql);

            dataGridView1.DataSource = ds.Tables[0];

        }

    }

}

重新发布webservice，发布之后之前添加的默认文档可能会删除。重新按照之前的步骤加入即可。然后删除之前的webservice服务应用。重新引用webservice服务。

     两个按钮事件

  public Form1()

        {

            InitializeComponent();

        }

         //初始化webservice

        WebReference.WebServiceDemo local_S = new WebReference.WebServiceDemo();

        //调用webservice连接数据库的方法