combobox绑定valueDisplay选定value

最新推荐文章于 2025-11-13 11:14:04 发布

原创最新推荐文章于 2025-11-13 11:14:04 发布 · 513 阅读

0 ·

CC 4.0 BY-SA版权

C# 专栏收录该内容

9 篇文章

订阅专栏

本文介绍如何在C#中正确配置ComboBox控件显示类别列表，并解释正确的属性设置顺序，确保用户界面能够准确地展示数据并获取所选项目的ID。

正确用法：

private void Form1_Load(object sender, EventArgs e)
{
IList<Categor> categorlist = new List<Categor>();
categorlist.Add(new Categor() { Id = 0, Name = "Google" });
categorlist.Add(new Categor() { Id = 1, Name = "Microsoft" });

comboBoxEx1.DisplayMember = "Name";
comboBoxEx1.ValueMember = "Id";
comboBoxEx1.DataSource = categorlist;
}

class Categor
{
public int Id
{
get;
set;
}
public string Name
{
get;
set;
}
}

private void comboBoxEx1_SelectedIndexChanged(object sender, EventArgs e)
{
int m = (int)comboBoxEx1.SelectedValue;
MessageBox.Show(m.ToString());
//Categor categor = comboBoxEx1.SelectedValue as Categor;
//if (categor != null)
//{
// MessageBox.Show(string.Format("{0}\r\n{1}", categor.Id, categor.Name));
//}
}

错误用法：

private void Form1_Load(object sender, EventArgs e)
{
IList<Categor> categorlist = new List<Categor>();
categorlist.Add(new Categor() { Id = 0, Name = "Google" });
categorlist.Add(new Categor() { Id = 1, Name = "Microsoft" });

comboBoxEx1.DataSource = categorlist;
comboBoxEx1.DisplayMember = "Name";
comboBoxEx1.ValueMember = "Id";
}