SQL 基本操作 删除 修改 刷新 修改版

C# 数据库之旅……
继续进攻层出不穷的problems
在上一篇内容的基础上，我又作以改进，现在的情况是这样的：
 //In Browseuser form
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Configuration;
using System.Data.SqlClient;
namespace Str
{
public partial class Browseuser : Form
{
public Browseuser()
{
InitializeComponent();
}

//define 数据集对象ds用于保存查询返回的结果集
DataSet ds;
private void Browseuser_Load(object sender, EventArgs e)
{
string strConnection = ConfigurationSettings.AppSettings["connectionstring"];
SqlConnection objConnection = new SqlConnection(strConnection);
objConnection.Open();
string sql = "select userid as userid,name as name from judging";
SqlDataAdapter adp = new SqlDataAdapter(sql, objConnection);
ds = new DataSet();
ds.Clear();
adp.Fill(ds, "judging");
dataGridView1.DataSource=ds. Tables[0].DefaultView;
dataGridView1.Refresh();
this.judgingTableAdapter.Fill(this.masterDataSet.judging);
}
/**********************************************************************************************/
/*至此完成了将数据库judging中的内容全部显示在新form——Browseuser上*/
/**********************************************************************************************/
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
}
private void button3_Click(object sender, EventArgs e)
{
this.Close();
}
//define a delegate instance in order to refresh
delegate void UseF();
/****************