datagridview 数据处理方法 修改 删除 添加 下拉类表 弹出窗口

using System.Collections.Generic;

using ponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using monClass;

namespace WDZ

{

public partial class dialog2 : Form

{

public dialog2()

{

InitializeComponent();

}

private void dialog2_Load(object sender, EventArgs e)

{

string mysql = "select * from user_class order by id";

bindcombox(USER_CLASS_CB, mysql, "user_class");

USER_CLASS_CB.SelectedIndex=USER_CLASS_CB.FindString(USER_CLASS_TB.Text,-1); //**非常重要，利用string查找到对应的index，然后就可以显示了，或者取value

}

// 填充Combox控件

private void bindcombox(ComboBox mycombox,string mysql,string tbname)

{

DataTable mydt = new DataTable();

DataOperate dataoperate = new DataOperate();

DataSet ds = dataoperate.getDs(mysql, tbname);

mydt = ds.Tables[0];

mycombox.ValueMember =mydt.Columns[1].ColumnName; //设置隐含的形式显示数值，起对应一定的名称

//cmb_Temp.ValueMember = "user_class";

mycombox.DisplayMember = mydt.Columns[2].ColumnName;

mycombox.DataSource = mydt;

mycombox.DropDownStyle = ComboBoxStyle.DropDownList; //只能选择，不能写入