[英]How to echo something in C# in an .aspx file
I know you can do this 我知道你可以做到这一点
<%= Request.Form[0] %>
But how do you do something like this? 但你怎么做这样的事情?
<% if(Request.Form[0]!=null)
echo "abc";
%>
<% if(Request.Form[0]!=null)
Response.Write("abc");
%>
Maybe you want to show the form value unless it doesn't exist then show "abc"? 也许你想显示表单值,除非它不存在然后显示“abc”?
<%= Request.Form[0] ?? "abc" %>
Or you could can use if blocks and normal markup inside. 或者你可以使用if块和普通标记。
<% if(Request.Form[0]!=null) { %>
<div class="echo">abc</div>
<% } %>
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