【转】DataGridViewComboBoxColumn的使用

本文转自:http://www.cnblogs.com/perfect/archive/2008/06/10/1216591.html



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。

posted on 2009-10-27 08:37  freeliver54  阅读(819)  评论(1编辑  收藏  举报

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