C#Sqlite数据库的搭建及使用技巧(2)-木庄网络博客

当前第2页返回上一页

  string connString = "server=.;database= StudentDB; User ID = sa; Pwd=123456";
            SqlConnection conn = new SqlConnection(connString);
            SqlCommand comm = new SqlCommand();
            comm.Connection = conn;
           // string sql = String.Format("select course_id '编号',course_name '课程名',teacher_name '教师姓名' from T_course");
            try
             {

                conn.Open();
                string sql = "select course_id ,course_name,teacher_name from T_course";
                SqlDataAdapter da = new SqlDataAdapter(sql, connString);
                DataSet ds = new DataSet();
                da.Fill(ds,"studens");da. Fill (ds, "students");//参数1 : DataSet对象;参数2:名,自定义的名字,不需要和查询的表名必须-致
                //方法一使用时注解其他方法
                dataGridView1.DataSource = ds;
                dataGridView1.DataMember ="studens";
                //方法二
                dataGridView1.DataSource = ds.Tables["studens"];
                //方法三
                DataTable dt = ds.Tables["studens"];
                dataGridView1.DataSource = dt.DefaultView;
                conn.Close();
              }
            catch (Exception ex)
                {
                       MessageBox.Show(ex.Message, "操作数据库出错！", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

                }

2.1.5 对datagridview进行数据绑定

使用MySQL也是可以对datagridview进行数据绑定的，对数据库连接方式改变，并且把那几个类型前面为My,其他都是一样的，提示要把命名空间导进去，ALt+ENter快捷导入，如果没有，导入哪里会叫你下载，下载就好了。

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;
using System.Data.SqlClient;
using MySql.Data.MySqlClient;
namespace student
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {


        }

        private void button1_Click(object sender, EventArgs e)
        {
            string connString = "server=localhost; database=student; uid=root; pwd=88888888;Character Set=utf8;";
            MySqlConnection conn = new MySqlConnection(connString);
            MySqlCommand comm = new MySqlCommand();
            comm.Connection = conn;
           // string sql = String.Format("select course_id '编号',course_name '课程名',teacher_name '教师姓名' from T_course");
            try
             {

                conn.Open();
                string sql = "select course_id ,course_name,teacher_naem from T_course";
                MySqlDataAdapter da = new MySqlDataAdapter(sql, connString);
                DataSet ds = new DataSet();
                da.Fill(ds,"studens");
                //方法一
                dataGridView1.DataSource = ds;
                dataGridView1.DataMember ="studens";
                //方法二
               /* dataGridView1.DataSource = ds.Tables["studens"];
                //方法三
                DataTable dt = ds.Tables["studens"];
                dataGridView1.DataSource = dt.DefaultView;*/
                conn.Close();
              }
            catch (Exception ex)
                {
                       MessageBox.Show(ex.Message, "操作数据库出错！", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

                }
            }
    }
}