下拉选定的索引已更改 [英] drop down selected index changed

问题描述

我是新来的，但我试着解释一下。



< pre lang =c＃>< embed src = / Programblade /<％：DropDownList1.SelectedValue.ToString（ ）％> width = 750 height = 550 >

它的工作原理非常好（因为我选择了一个默认的选项，但这是问题所在。



我希望它刷新那个区域，当selectedindexchanged，我尝试了很多，并搜索网络，但找不到我想要的东西。



< pre lang =c＃> protected void DropDownList1_SelectedIndexChanged（ object sender，EventArgs e）
{
什么我应该写在这里????刷新其他代码？
}

希望得到一些帮助:)



-Thanks

解决方案

您应该使用Literal [ ^ ]然后只需将所需的embed标签输出到Text属性，并将Mode设置为PassThrough。 br />


这样的事情：

 <   asp：literal     id   =  MyLit    mode   =  PassThrough >   <   / asp：literal  >  
 

  protected   void  DropDownList1_SelectedIndexChanged（< span class =code-keyword> object  sender，EventArgs e）
 {
  if （！string.IsNullOrEmpty（DropDownList1） .SelectedValue）{
 myLit.Text =  < embed src = \ < span class =code-string>  / Programblade / \ dropdownlist1.selectedvalue =    width =   \750 \ height =   \550 \ >  < /   embed  >   ; 
} 
}  

请注意这是直接写入浏览器所以它可能不会编译。

问题解决了。



我没有检查解决问题的下拉列表中的AutoPostBack。



感谢您的兴趣，感谢您抽出宝贵时间。

Hi,

I am new at this, but i try to explain.

<embed src="/Programblade/<%: DropDownList1.SelectedValue.ToString()  %>" width="750" height="550">

And it works really fine(because i have choosen an default selected item, but here is the problem.

I want it to refresh that area, when the selectedindexchanged, i tried a lot, and search the web, but could not find what i was looking for.

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            What should i write here???? to refresh the other code?
        }

Hope for some help :)

-Thanks

解决方案

Instead of writing out your embed tag and then inserting the actual file name you should look at using a Literal[^] and then just output the desired embed tag to the Text property and set the Mode to PassThrough.

So something like this:

<asp:literal id="MyLit" mode="PassThrough"></asp:literal>

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
    if (!string.IsNullOrEmpty(DropDownList1.SelectedValue){
       myLit.Text = "<embed src="\"/Programblade/\"" dropdownlist1.selectedvalue="" width="\"750\"" height="\"550\""></embed>";
    }
}

Please note this was written directly into the browser so it probably wont compile.

Problem solved.

I haven''t checked AutoPostBack on the dropdown that solved the problem.

Thanks for the interest and sorry for taking your time.

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