form1.cs

Visual C#2005程序设计教程

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace _2._._
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // TODO: 这行代码将数据加载到表“employeeDataSet.employee”中。您可以根据需要移动或移除它。
            this.employeeTableAdapter.Fill(this.employeeDataSet.employee);
            this.Text = "多表查询示例";
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //定义变量dvresult为DataView类型，并为其赋值当前DataSet的缺省视图
            DataView dvresult = employeeDataSet.employee.DefaultView;
            //设置DataView中的数据按部门列排序
            dvresult.Sort = "部门";
            //设置过滤器，仅显示指定部门的行
            dvresult.RowFilter = "部门='" + textBox1.Text + "'";
            
            dvresult.RowStateFilter = DataViewRowState.CurrentRows;	//设置行状态过滤器
            // 指定DataGridView控件的新数据源为按部门过滤后的DataView
            dataGridView1.DataSource = dvresult;
            

        }

        private void button2_Click(object sender, EventArgs e)
        {
            DataView dvresult = employeeDataSet.employee.DefaultView;
            dvresult.Sort = "部门";
            dvresult.RowFilter = "";　　//取消过滤器
            dvresult.RowStateFilter = DataViewRowState.CurrentRows;
            dataGridView1.DataSource = dvresult;
        }

        private void button3_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}