Question

[HttpException (0x80004005): 不能在 DropDownList 中选择多个项。]

首先,母版页中不存在DropDownList控件,只是在我其中的一个包含在Content里的页面里有四个DropDownList,两个用数据绑定,其它两个根据登录身份填充,如下:
if(jibie==4)
{
if (MyDropDownList.Items.Count != 0)
{
MyDropDownList.Items.Clear();
}
ListItem li = new ListItem("name_1", "name_1");
MyDropDownList.Items.Add(li);
}
else if (jibie == 5)
{
if (MyDropDownList.Items.Count != 0)
{
MyDropDownList.Items.Clear();
}
ListItem li = new ListItem();
li.Text = "name_1";
li.Value = "name_1";
MyDropDownList.Items.Add(li);

li.Text = "name_2";
li.Value = "name_2";
MyDropDownList.Items.Add(li);

li.Text = "name_3";
li.Value = "name_3";
MyDropDownList.Items.Add(li);

li.Text = "name_4";
li.Value = "name_4";
MyDropDownList.Items.Add(li);

li.Text = "name_5";
li.Value = "name_5";
MyDropDownList.Items.Add(li);
}
if (MyDropDownList.Items.Count != 0)
{
MyDropDownList.Items[0].Selected = true;
}
诚意请有经验高手,解答问题,谢谢!

ASP.aq_master.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in f:\WebSite\jnxd_测试\aq.master:12

版本信息: Microsoft .NET Framework 版本:2.0.50727.832; ASP.NET 版本:2.0.50727.832

Answer 1

你先清除之前已经选择的项
MyDropDownList.SelectedItem.Selected = false;
然后再定位就OK了