CODEWITHSUNDEEP
c#asp.net
Unknown Coder
Unknown Coder

Reputation: 6731

ASP.NET HtmlInputHidden control - stop name from changing?

I have an asp.net page and I'm trying to add a couple of hidden HTML input controls. I will be submitting this form to another site (PP) so I need the names of the controls to NOT change when rendered. Is there a way to make ASP.NET honor the name property that I set in the code-behind?

As an alternate, I don't need to dynamically create these controls, I can also just assign the value to an existing HTML field but I don't know how to do that with ASP.NET/C#

Upvotes: 1

Views: 2807

Answers (2)

Lars Peter Larsen
Lars Peter Larsen

Reputation: 321

The problem with putting literals inside HTML-tags is that the literals are very likely to, at some annoying point in time, to be removed from the designer-codebehind file. Even though you could manually add them, this will in most case screw up the mapping between the GUI-based editor and the designer-codebehind.

Further, if you are using Master Pages, they will anyway change the value of the name-attribute on your hidden fields.

I have been in search for the best way to do this myself, and was just about to write my own custom control, so I could preserve the value of the name-attribute. Then I came across this answer to a similar question, where Page.ClientScript.RegisterHiddenField("ppID", "1234") was mentioned. Bingo!

Upvotes: 1

s_hewitt
s_hewitt

Reputation: 4302

Are you using ASP.NET 4.0? You can use ClientIDMode on the control with a value of static, and the ID will not change.

Otherwise you could use a literal to output the element itself or just its value. On you're page you'd have:

<input type="hidden" id="ppID" value='<asp:Literal ID="ppIDValue" runat="server" />' />

or

<input type="hidden" id="ppID" value="<%= ppIDValue %>" />

And in the code behind or wherever:

this.ppIDValue.Text = "value for ppID";

or (abbreviated):

public class MyPage : Page
{
    public string ppIDValue = "0";
    override OnLoad()
    { this.ppIDValue = "100"; }
}

Upvotes: 4

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