手动验证码无法正常工作 [英] Manual Validation Code is not working properly

问题描述

大家好

我有一个DropDownList用于选择一些表名.我宁愿写这样的if-else代码，也不愿放置RequiredFieldValidator

Hi to all

I have a DropDownList for selecting some table names. Rather than placing a RequiredFieldValidator I preferred to write if-else code like this

if
{  
    DropDownList.SelectedIndex==0;
    Label1.Visible = true
    Label1.Text = " Please Select Correct Table";

}

当我先完美地选择任何表名，然后选择选项"Select Table Name(SelectdIndex==0)"
时，它工作正常
但是，如果我第一次选择"Select Table Name"选项，它将无法正常工作.请告诉我您是否知道问题出在哪里.

it is working properly when i first select any table name perfectly and then if i select the option "Select Table Name(SelectdIndex==0)"

but if i select "Select Table Name" option first time it''s not working . Please tell me if u know where the problem is lying.

推荐答案

不确定您在做什么，您的if(condition)在哪里，您可以尝试设置属性AutoPostBack="true".

有关更多查询，请在此处评论！

希望对您有所帮助:)

Not sure what you are doing , where is your if(condition), you can try setting the DropDownList property AutoPostBack="true".

for further queries comment here!

hope it helps :)

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