从代码隐藏获取HTML控件

Question

I would like to know how I can reach attributes in code behind (if possible) added to the HTML control using jQuery!

I have this ASP.NET-control:

 <asp:TextBox ID="myID" CssClass="class1 class2 " runat="server"></asp:TextBox>

In jQuery I set it to:

var myInput = $(control).find('#<%= myID.ClientID %>');
myInput.addClass('class3');

My problem is that I am not able to see in code behind that I have added class3 ?

Answer 1

It's not possible. You use client code to add class, buy during the post operation only the form values posted, not the entire html. Check it with fiddle for example. That is not how http work.

Answer 2

A page only post name value pairs of the form element to the server. So the code behind on the postback has only viewstate and new name value collection of form elements. So there is no straight way that a code behind may now what modification you have done using jquery in the dom except the values in the form element. And if the class is added at compile time or in code behind, this information is maintained in view state and page with the help of view state restores the control properties. If it is really needed in your current task then you can put name of the class in any hidden element using jquery and get the values of the hidden element in code behind.

Answer 3

myID.Attributes["class"]

尚未实际尝试执行此操作，但这就是我要尝试的操作。