I know this has been working for me in the past, but my attempt to set the value of my radiobutton is ignored and the value is set to the ID of my radio button.
ASP.Net
<asp:RadioButton ID="rb" runat="server" />
Code behind
//Test 1
rb.InputAttributes.Add("value", "foo");
//Test 2
rb.InputAttributes["value"] = "foo";
HTML output
<input id="rb" type="radio" name="rb" value="rb" />
What am I missing here?
Setting the value in ASP.Net markup is working, but I rather do this from codebehind.
You can simple do:
rb.Attributes.Add("value", "foo");
HTML output:
<input id="ContentPlaceHolder1_rb" type="radio" name="ctl00$ContentPlaceHolder1$rb" value="foo">
Code behind :
rb.Attributes.Add("value", "RadioButton");
Output
<input id="rb" type="radio" name="rb" value="RadioButton" />
Reference:
Set HTML Attributes for Controls in ASP.NET Web Pages
Related
I have the following html:
<html>
<body>
<form runat="server">
Name: <input type="text" name="name" />
<br />
<input type="submit" name="submit" />
</form>
</body>
</html>
How do I retrieve the value in the "name" textbox posted back to the webserver to manipulate in ASP.NET WebForms?
(I know about the ASP.NET built-in controls and the possibilities with them, but I am looking for a "clean" solution without the use of built-in ASP.NET controls)
If you can't, or don't want to use asp.net textboxes, then you can retrieve the name of a regular html textbox like this:
string nameTextPosted = Request.Form["name"];
Just note that textboxes created in this manner will not automatically persist their values across postbacks like asp.net textboxes will.
Simplest solution would be to turn it into a server-side component and access it by it's name. e.g.
<asp:TextBox Id="Name" runat="server"></asp:TextBox>
...
string name = Name.Text;
Unless you have other reasons not to use a component, you'd only be making things much more difficult on your part for no justification.
ASP.net includes Html server controls for backward compatibility for just someone like you fond of html. make your html tags server controls by adding the runat="server" and id properties and you are able to access them inside your server side code with their id.
<form runat="server">
Name: <input type="text" name="name" id="name" runat="server" />
<br />
<input type="submit" name="submit" id="name1" runat="server" />
</form>
Now after this you can control their behavior:
name.Value="Hellow World !"
You have to add id and runat="server" in each control. like this :
<input type="text" name="name" id="name" runat="server" />
Its better to use asp:TextBox like this :
<asp:TextBox ID="name" runat="server"></asp:TextBox>
I got a request to add this form to a asp.net control.
I want to use asp.net text box and button to submit the info to the form. (because I have special controls to match the look and feel).
this is the form:
<form name="ccoptin" id="signup" action="http://visitor.r20.constantcontact.com/d.jsp"
target="_blank" method="post">
<input type="hidden" name="llr" value="yyyyyy">
<input type="hidden" name="m" value="xxxxxx">
<input type="hidden" name="p" value="oi">
<label>sign up for new services and promotions:</label>
<input type="text"name="ea" value="" class="text" />
<input type="submit" id="iframe" class="submit"
name="go" value="submit" />
</form>
can this be done?
yes, you can use asp.net Textbox control for html input control and you can put the same styling. e.g.
<asp:TextBox ID="ea" CssClass="text" runat="server"></asp:TextBox>
Button control for html submit button e.g.
<asp:Button ID="iframe" CssClass="submit" runat="server" Text="submit" />
For your input type hidden, you can use asp.net HiddenField Control
<asp:HiddenField ID="llr" runat="server" Value="yyyyyy" />
Yes it can be done . On browser side ASP.NET controls get converted in to HTML even if you use the asp.net button.
Drag and drop asp.net button from toolbox and put attribute id , cssclass , name , text . It will get converted in end to HTML as expected
<asp:Button id="iframe" cssclass="submit"
Text="Submit" runat="server" />
Yeah. You have to consider these notes:
If you want to use ASP.NET controls, you should add runat='server' attribute to your form element. It's because ASP.NET controls (AKA server controls) while rendering check to see if they are get rendered in a server form (VerifyRenderingInServerForm method).
<asp:Hidden control is your replacement for <input type='hidden'
<asp:TextBox control is your replacement for <input type='text'
<asp:Button control is your replacement for <input type='submit'
All of your server controls should have runat='server' attribute
ASP.NET only allows for one form with runat=server, and all of your server controls have to be within a form with runat=server. Nesting forms isn't advisable.
See reference on form nesting:
https://web.archive.org/web/20170420110433/http://anderwald.info/internet/nesting-form-tags-in-xhtml/.
You'll need the form in a different document object - maybe host it in an iframe and conver the mini-form to an ASPX page that you load into the iframe ...
For example in my datalist if Eval("OptionJ").Tostring = Null I would like the function GetVisible to set visibility of the radio button to false like so:
<input name="Q<%#Eval("ID")%>" type="radio" value="J" visible="<%# GetVisible(Eval("OptionJ").ToString()) %>">
<%#Server.HtmlEncode(Eval("OptionJ").ToString())%>
</option><br />
I then have a codebehind function like so:
Protected Function GetVisible(ByVal Evalresult As String) As String
If Evalresult = Nothing Then
Return "False"
Else
Return "True"
End If
End Function
I have also tried checking EvalResult = String.empty
In the outputted html the visible status is being set to false...
<input name="Q3" type="radio" value="J" visible="False">
But it is still displayed on the page!
Please can you let me know how to get this working? Thanks in advance for your time reading and any answers posted.
Try this one:
<input name="Q3" type="radio" value="J" visible="false" runat="server">
Visible property works only for ASP.NET Server control but here you are using Html Input Control.
So one approach is that add runat="server" attribute in this control to if you want to continue with visible property and second one is that add style="visibility:hidden" attribute for HTML input control as given below:
<input name="Q3" type="radio" value="J" style="visibility:hidden">
I'm having some real problems with a group of HTML Radiobuttons when I try to pass the selected values back and forth between JavaScript and ASP.NET.
<input type="radio" id="radio1" name="markerSel" value="1" checked=true />
<input type="radio" id="radio2" name="markerSel" value="2" />
<input type="radio" id="radio3" name="markerSel" value="3" />
To begin with, the form loads with these radiobuttons and a user selects a value and submits the ASP.NET form. To get the value of the selected option on the server-side I have tried;
string selVal = Request.Form["markerSel"];
//always returns "1", regardless of the selection made.
And also tried ASP.NET's FindControl method (recursively too), and I just get null.
I want to be able to set the value of this radiobutton group via JavaScript and Asp.NET and be able to read from both environments.
Any help would be appreciated.
Thanks
Is there a reason why you don't use ASP.NET radio buttons instead of <input type=radio />?
If you use
<asp:RadioButton id="radio1" runat="server" Checked="true" />
<asp:RadioButton id="radio2" runat="server" />
<asp:RadioButton id="radio3" runat="server" />
You will be able to access them server-side by doing this.radio1.Checked
If you want to access your elements via javascript, you can do a document.getElementById('radio1') and you will get the DOM element that way.
If you want to use jQuery, you can access the radio buttons with
$('#radio1')
If you want to test if the radio button is checked, you can use
if ($("#radio1").is(':checked')) {//...
hmmm... I would try changing the line to:
string selVal = Request.Form("markerSel");
I have created a custom text box with property "key"(ASP.NET C#).I want to get the value of this property "key" using java script.How can I do this?
Not sure what you are asking.
if you have a textbox rendered like so:
<input type="text" id="foo" key="somekey" text="Hello" />
You could get the value of "key" in JS like so:
document.getElementById('foo').getAttribute('key')
If you are using jquery than for this will help you.
$("#tb1").attr("key")
for this textbox
<input type="text" id="tb1" key="mykey" text="" />