asp.net – 在Selectedindexchanged事件中选择下拉列表值

this.ComboBox1.SelectedIndexChanged += new System.EventHandler(ComboBox1_SelectedIndexChanged);

然后像这样编写事件处理程序：

private void ComboBox1_SelectedIndexChanged(object sender,System.EventArgs e)
{
  ComboBox comboBox = (ComboBox) sender;
  string selected = (string) comboBox.SelectedItem;
}

在设置组合框默认值之前,请确保在Page_Load中编写此内容,否则最终将使用此选项：

if (Page.IsPostBack)
  return;