Winform中DataGridview的基本用法

 一  dataGridView数据控件的数据绑定和对数据的操作 

      一些基本的功能都已实现  相关下载：DataGridViewTest.rar

 

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

namespace DataGridViewTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        int Fcellvalue;　　//用于保存主键的值
        
        SqlDataAdapter da;

        SqlConnection conn;

        SqlCommand cmd = new SqlCommand();

        string connstr = "Data Source = .;database=Test;uid=sa;pwd=123;";

        private void Form1_Load(object sender, EventArgs e)
        {
            

            Getdate();
            dataGridView1.Columns[0].Visible = false;

            dataGridView1.Columns[1].HeaderText = "姓名";
            dataGridView1.Columns[2].HeaderText = "性别";
            dataGridView1.Columns[3].HeaderText = "民族";
            dataGridView1.Columns[4].HeaderText = "公司";
            dataGridView1.Columns[5].HeaderText = "职位";
            dataGridView1.Columns[6].HeaderText = "地址";
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            toolStripStatusLabel5.Text ="当前时间："+ DateTime.Now.ToString();
        }

        //绑定数据
        public void Getdate()
        {
            try
            {
                conn = new SqlConnection(connstr);

                conn.Open();

                string strcmdsel = "select * from T1";

                da = new SqlDataAdapter(strcmdsel, connstr);

                DataSet ds = new DataSet();

                da.Fill(ds);

                dataGridView1.DataSource = ds.Tables[0].DefaultView;

            }
            catch (SqlException sql)
            {
                MessageBox.Show(sql.ToString());
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                conn.Close();
            }

        }

        //刷新数据
        private void button5_Click(object sender, EventArgs e)
        {
            Getdate();
        }

        //单击行标题的时候 取到这一行第一列的值 即主键的值
        private void dataGridView1_RowHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            Fcellvalue = Convert.ToInt32(dataGridView1.CurrentRow.Cells[0].Value);   //取到主键
        }

        //查询满足条件的数据
        private void button1_Click(object sender, EventArgs e)
        {
            try
            {

                if (textBox1.Text.Trim() == "")
                {
                    MessageBox.Show("请输入查询条件！！！");
                }
                else
                {
                    conn = new SqlConnection(connstr);

                    conn.Open();

                    string selectLevel = "select * from T1 where LevelInfo='" + textBox1.Text.Trim() + "'";

                    da = new SqlDataAdapter(selectLevel, connstr);

                    DataSet ds = new DataSet();

                    da.Fill(ds);

                    dataGridView1.DataSource = ds.Tables[0].DefaultView;

                }
                
            }
            catch (SqlException sql)
            {
                MessageBox.Show(sql.ToString());
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                conn.Close();
            }

            textBox1.Text　=　"";
        }

        //删除选中行
        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                conn = new SqlConnection(connstr);

                conn.Open();

                string strcmddel = "delete  from T1 where ID=" + Fcellvalue;

                cmd.Connection = conn;
                cmd.CommandText = strcmddel;
                cmd.CommandType = CommandType.Text;

                cmd.ExecuteNonQuery();
                
                Getdate();
            }
            catch (SqlException sql)
            {
                MessageBox.Show(sql.ToString());
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                conn.Close();
            }
            
        }

        //新增一行数据
        private void button3_Click(object sender, EventArgs e)
        {
           
            try
            {
                conn = new SqlConnection(connstr);

                conn.Open();

                string F = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[1].Value.ToString();
                string S = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[2].Value.ToString();
                string T = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[3].Value.ToString();
                string Four = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[4].Value.ToString();
                string Five = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[5].Value.ToString();
                string Six = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[6].Value.ToString();

                string strcmdIn = " insert into T1 values('" + F + "','" + S + "','" + T + "','" + Four + "','" + Five + "','" + Six + "')";
                cmd.Connection = conn;
                cmd.CommandText = strcmdIn;
                cmd.CommandType = CommandType.Text;

                cmd.ExecuteNonQuery();

                Getdate();
            }
            catch (SqlException sql)
            {
                MessageBox.Show(sql.ToString());
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                conn.Close();
            }
        }

       //修改数据项
        private void button4_Click(object sender, EventArgs e)
        {


            try
            {
                conn = new SqlConnection(connstr);

                conn.Open();

                string F = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[1].Value.ToString();
                string S = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[2].Value.ToString();
                string T = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[3].Value.ToString();
                string Four = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[4].Value.ToString();
                string Five = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[5].Value.ToString();
                string Six = dataGridView1.Rows[dataGridView1.CurrentRow.Index].Cells[6].Value.ToString();

                string strcmdUpdate = " update T1 set Name='" + F + "',Sex='" + S + "'," +
               " Minzu='" + T + "',Com='" + Four + "',LevelInfo='" + Five + "',Address='" + Six + "' where ID = " + dataGridView1.CurrentRow.Cells[0].Value;
                cmd.Connection = conn;
                cmd.CommandText = strcmdUpdate;
                cmd.CommandType = CommandType.Text;

                cmd.ExecuteNonQuery();

                Getdate();
            }
            catch (SqlException sql)
            {
                MessageBox.Show(sql.ToString());
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
            finally
            {
                conn.Close();
            }  
        }

        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.RowIndex == -1)
                return;

            dataGridView1.Rows[e.RowIndex].Cells[1].Style.ForeColor = Color.Red;
            dataGridView1.Rows[e.RowIndex].Cells[2].Style.ForeColor = Color.Red;
            dataGridView1.Rows[e.RowIndex].Cells[3].Style.ForeColor = Color.Red;
            dataGridView1.Rows[e.RowIndex].Cells[4].Style.ForeColor = Color.Red;
            dataGridView1.Rows[e.RowIndex].Cells[5].Style.ForeColor = Color.Red;
            dataGridView1.Rows[e.RowIndex].Cells[6].Style.ForeColor = Color.Red;
        }

        private void dataGridView1_CellLeave(object sender, DataGridViewCellEventArgs e)
        {
            if (e.RowIndex == -1)
                return;
            dataGridView1.Rows[e.RowIndex].Cells[1].Style.ForeColor = Color.Black;
            dataGridView1.Rows[e.RowIndex].Cells[2].Style.ForeColor = Color.Black;
            dataGridView1.Rows[e.RowIndex].Cells[3].Style.ForeColor = Color.Black;
            dataGridView1.Rows[e.RowIndex].Cells[4].Style.ForeColor = Color.Black;
            dataGridView1.Rows[e.RowIndex].Cells[5].Style.ForeColor = Color.Black;
            dataGridView1.Rows[e.RowIndex].Cells[6].Style.ForeColor = Color.Black;
        }

    }
}