下拉列表选择值错误 [英] Drop down list selected value error

问题描述

我在更新面板中有一个下拉列表但是当我为ddl.selectedValue分配任何值时，它没有选择该值



例如。

I have one drop down list in update panel but when I assign any value to ddl.selectedValue it is not selecting that value

for eg.

ddl.selectedValue=2

然后它仍然是空的



i使用断点检查它并没有变为2.



请帮帮我......

then it remains null

i had check it using break point it is not changing to 2.

please help me......

推荐答案

hay jagdish，



更改下拉列表属性AutoPostBack：True

它的工作..

hay jagdish,

Change your dropdownlist properties AutoPostBack : True
its work..

我认为你可以在设计页面中给出属性。< br $>

I think you can give the property in design page itself.

<asp:DropDownList ID="DropDownListname" runat="server">
                    <asp:ListItem Value="0">first value</asp:ListItem>
                    <asp:ListItem Value="2">second value</asp:ListItem>
                    <asp:ListItem Value="3">third value</asp:ListItem>
                </asp:DropDownList>

或者尝试



dropdownlist.selecteditem ='那个字符串'

Or try

dropdownlist.selecteditem='That String'

我发现它是数据绑定错误。数据未绑定到ddl，因此所选值为空。





thanx to u all for reply ...

I found that it was databinding error. data was not bound to ddl therefore selected value was empty.


thanx to u all for reply...

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