有没办法在服务端让dropdownlist不选择

[ttyp]

DropDownList1.Items.Add(new ListItem("1","1"));
DropDownList1.Items.Add(new ListItem("2","2"));
DropDownList1.Items.Add(new ListItem("3","3"));

DropDownList1.SelectedIndex = -1;

//现在只能通过js来实现了

[ttyp]

楼上几位测试下吧，看来是没办法了

[goody9807]

DropDownList1.Enable=false

[learner01]

up!

[saucer]

it is the browser issue, the browser will select the first one if none is selected, try to add an empty ListItem at the top or use javascript


DropDownList1.Items.Insert(0,new ListItem("",""));

[zhengjianning402]

DropDownList1.Items.Insert(0,new ListItem("",""));
同意

[colinliu]

dropdownlist.selecteditem.text=""

或上邊的方法也可以....

[ttyp]

dropdownlist.selecteditem.text=""
改写了第一个条目

DropDownList1.Items.Insert(0,new ListItem("",""));
不行，因为要在js里判断其SelectedIndex

就奇怪js里能改，服务端为什么不能改呢

[baobaofall]

DropDownList1.Items.Insert(0,new ListItem("",""));


完全正确

[gui1401]

DropDownList1.Items.SelectedItem.Selected = false;

[chenyuming2004]

if(!IsPostBack)
{
DropDownList1.Items.Add(new ListItem("1","1"));
DropDownList1.Items.Add(new ListItem("2","2"));
DropDownList1.Items.Add(new ListItem("3","3"));
Response.Write("<script language=\"javascript\">"
+"DropDownList1.selectedIndex=-1;"
+"</script>");
}
这样写虽然效果不好。