如何设定价值 <input type=“hidden”> 在asp .net page_load中不使用runat =“server”

Question

i need to do the following two things...

1. i want to set value of in asp .net page_load. the problem is that i dont want to use runat="server". i have tried this the following but it does not work:

HtmlInputHidden hiddenControl = (HtmlInputHidden) FindControl("a");

is there a way to access in asp .net page_load without using runat="server"? ? ?

2. i can do this if i use but in this case i cannot access it in master page's javascript function. i have tried this but it does not work...
   • var hdnField = document.getElementById('<%= hdnIdentity.ClientId%>');
   • var hdnField = document.getElementById("hdnIdentity").getAttribute("value");
   • var hdnField = document.getElementById("hdnIdentity").value

what i need... i want to access content page's hidden field value in javascript in master page. is there a way ? ? ? thnx in advance regards Haroon haroon426@yahoo.com

Answer 1

I sometimes do the following, especially when I want control over my ids (especially when using jquery).

<asp:literal id="literal1" runat="server"><input type="hidden" id="someid" value="{0}"/></asp:literal>

Then, in codebehind you can set the value with the following:

literal1.Text = string.Format(literal1.Text, "somevalue");

This doesn't really get around using runat="server", but you haven't specified why you don't want to do that. Also, you'd have to get the value with a request.form

Update

In .net 4.0 you have much more control over your IDs. See this for more information:

http://weblogs.asp.net/asptest/archive/2009/01/06/asp-net-4-0-clientid-overview.aspx

Answer 2

IIRC，你需要在那里的某个地方查看HttpRequest.Forms 。

Answer 3

如果该值是POST表单的一部分，那么如果它是GET表单，则需要检查Request.Forms或Request.QueryString。

Answer 4

ad 1) in aspx file just write <input type="hidden" value="<%=GetHiddenValue%>" /> . And in your code behind define protected property

public class MyPage : Page {
  protected GetHiddenValue { get { /*...*/ } }

Answer 5

You can use it in your master page javascript how ever the control name is not what you expect it to be you'd need to use ClientID to get that. If you do not apply runat=server you can only get a hold of the control as text by either traversing the .aspx file or as some one mentioned embedding it in a named tag and then doing string manipulation on the inner HTML. That is for setting it. If you need to get the value use Request[tagName] or similar

Answer 6

ad 2) You can use simple html code in your content page with specified id <input type="hidden" id="myHiddenField" /> . Then in master page javascript use document.getElementById('myHiddenField') .