15.2DataGridView绑定数据源的两种方法

Posted 2020-07-06 前缘

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;

namespace _15._2DataGridView绑定数据源
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            dgvBindMode.DataSource = BindModeSource().Tables[0];//数据集可以包含多张表格，调用时候需要指定
            dgvNonBindMode.DataSource = nonBindSource();

        }

        private DataSet BindModeSource()
        {
            string constr = "Server=.;uid=sa;pwd=zqyo850619;database=csharpzxw";
            SqlConnection mycon = new SqlConnection(constr);
            DataSet myds = new DataSet();//申明一个数据集
            try
            {
                mycon.Open();
                string sql = "select name,gender from mytable001";
                SqlDataAdapter myda = new SqlDataAdapter(sql, mycon);//申明一个数据适配器，包括数据库查询语言 和连接的数据源信息
                myda.Fill(myds,"mytable001");//适配器将数据源种的表装载到数据集中


            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                mycon.Close();

            }
            return myds;
        }

        private DataTable nonBindSource()
        {
            DataTable mydt = new DataTable();
            mydt.Columns.Add("name", Type.GetType("System.String"));
            mydt.Columns.Add("gender", Type.GetType("System.String"));
            string[,] mystr = { { "张三", "女" }, { "李四", "男" }, { "王五", "男" }, { "赵六", "女" }, { "何七", "男" } };
            for(int i = 0; i < mystr.Length / 2; i++)
            {
                DataRow mydr = mydt.NewRow();
                mydr[0] = mystr[i, 0];
                mydr[1] = mystr[i, 1];
                mydt.Rows.Add(mydr);



            }
            return mydt;
        }
    }
}