DataGridViewComboBoxColumn的使用

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 Sys

{

public partial class Form3 : Form

{

public Form3()

{

InitializeComponent();

}

private void Form3_Load(object sender, EventArgs e)

{

dataGridView1.AllowUserToAddRows = false;

dataGridView1.AutoGenerateColumns = false;

using (SqlConnection sqlconn = new SqlConnection("server=.;uid=sa;pwd=sa;database=xx"))

{

string sql1 = @"select userid,fullname,a.[description],b.ugroupid

from users a left outer join usergroup b

on a.grade=b.ugroupid";

string sql2 = "select distinct ugroupid,[description] from usergroup";

DataGridViewComboBoxColumn dgvComboBoxColumn = dataGridView1.Columns["grade"] as DataGridViewComboBoxColumn;

dgvComboBoxColumn.DataPropertyName = "ugroupid";

dgvComboBoxColumn.DataSource = GetTable(sql2).DefaultView;//必须在设置dataGridView1的DataSource的属性前设置

dgvComboBoxColumn.DisplayMember = "description";

dgvComboBoxColumn.ValueMember = "ugroupid";

dataGridView1.DataSource = GetTable(sql1).DefaultView;//一定要在dgvComboBoxColumn的DataSource后设置

}

}

private DataTable GetTable(string sql)

{

using (SqlConnection sqlconn = new SqlConnection("server=.;uid=sa;pwd=yuling1310;database=smls"))

{

DataTable dt = new DataTable();

SqlDataAdapter sqlda = new SqlDataAdapter(sql, sqlconn);

sqlda.Fill(dt);

return dt;

}

}

}

}

注意事项：

.注意其ValueMember的DataType与DataPropertyName对应的列的DataType要相同，他不会为你做类型转换的。

2.编程设置显示样式时注意一定要在设置DataSource之前设置DataGridViewComboBoxColumn的DataSource等属性。