setting asp:RadioButton Text from javascript - javascript

I am having the following Radio butttons in my aspx file.
<asp:RadioButton ID="rdoOption1" runat="server" GroupName="grpAnswers"/>
<asp:RadioButton ID="rdoOption2" runat="server" GroupName="grpAnswers"/>
<asp:RadioButton ID="rdoOption3" runat="server" GroupName="grpAnswers"/>
<asp:RadioButton ID="rdoOption4" runat="server" GroupName="grpAnswers"/>
I want to set the text from javascript on a button's click.
Javascript code is as follows.
document.getElementById("rdoOption1").innerHTML = "sometext";
I've also tried with Text,nodevalue instead of innerHTML, no use. Plz help.

You need to use ClientID in javascript instead of using the server side id. As the server side id is changed when html is generated by asp.net. You also have : instead of semi colon at the end of javascript statement. Use value instead of innerHTML as that is not for input html elements.
document.getElementById("<%= rdoOption1.ClientID %>").value = "sometext";
If you have .Net Framework 4 and above then you can use Control.ClientIDMode="static" to keep the server id on the client side.
Edit The second thing you have to take care is to make sure the html element you are trying to access is already added to DOM. You can do this by putting the script after the html elements you are trying to access. The best place would be just before the ending body tag </body>
<script type="text/javascript>
document.getElementById("rdoOption1").innerHTML = "sometext";
</script>
</body>

Atlast I've found the solution for this.
Actually the asp:RadioButton is rendering in the browser as follows,
<input name="grpAnswers" id="rdoOption1" type="radio" value="rdoOption1"/>
<label for="rdoOption1">
Note: It'll generate label only if you specify some value for Text property of the asp:RadioButton.
So ,I have changed my code as follows,
<asp:RadioButton ID="rdoOption1" runat="server" GroupName="grpAnswers" Text=" "/>
My Javascript code to set Text for that asp:RadioButton is as follows,
document.getElementById("rdoOption1").nextSibling.innerHTML = "someText";
This one worked for me.Thanks to all those who spent their valuable time in answering my question. :)

ASP.Net controls are server side controls and not client side controls like HTML.
Their actual ID's get generated during the run time not before hand.
So, your syntax should be some thing like:
document.getElementById("<%= rdoOption1.ClientID %>").innerHTML = "sometext";

Check out this post: how-to-change-the-text-of-a-radio-button.
I don't think you can change the text using innerText of a radio button.

Related

How to get the value from span element inside div that are set from C# code using Javascript

I have an aspx file with span sections inside a div:
<div id="child1container" runat="server">
<span class="textclass" id="UserName" runat="server" ClientId="username1"></span>
<span class="textclass" id="BankName" runat="server" ClientId="bankname"></span>
<div>
Here the values for Username and Bankname are set by the code behind (using .cs file). Once after the value is being set by the code, I need to capture the value of username and bankname in javascript using document.getElementById.value. Could someone help me on how to get this value in javascript so that I can do some more manipulation after this. I know I need to use window.onload function, but would like to know how to get the value from span element.
var val = document.getElementById("<%=BankName.ClientID%>").value
Typically ASP.NET controls have a ClientID property. That is how the ID will render in HTML.
<span class="textclass" id="BankName" runat="server" ClientId="bankname"></span>
Then in your javascript:
document.getElementById('<%= BankName.ClientID %>')

Get/Set asp:textbox values from javascript

I'm not super familiar with javascript but I'm working on it, I'm trying to do a "same as billing address" type checkbox to fill some textboxes on the same form with data from other textboxes. I found a few solutions online but they weren't working for me. I'm probably overlooking something simple, but I've tried quite a few. Here's what I currently have:
function AutoFillBilling()
{
var text = document.getElementById("CustContact").Value;
alert(text);
}
The alert pops up, but just says undefined, I also tried $("#CustContact").Value to no avail. Below is the textbox I'm trying to access
<asp:Textbox runat="server" ID="CustContact" ClientIDMode="Static" type="text" placeholder="Contact" class="required"/>
What am I missing?
Properties begin with lowercase letters in JavaScript:
var text = document.getElementById("CustContact").value;
Additionally, while the ClientIDMode="Static" certainly should be explicitly setting the client-side id property, when debugging you may want to examine the HTML just to make sure. When using JavaScript, looking only at your server-side markup leaves you unnecessarily blind.
You can use it as such
<asp:CheckBox ID="Postal_Same_As_PermCheckBox" runat="server" onclick="copyPermAddress(this);" />
And JavaScript as
<script type="text/javascript">
function copyPermAddress(e) {
if (e.checked) {
document.getElementById('Postal_Adrs_Line_1TextBox').value = document.getElementById('Perm_Adrs_Line_1TextBox').value;
document.getElementById('Postal_City_VillageTextBox').value = document.getElementById('Perm_City_VillageTextBox').value;
} else {
document.getElementById("Postal_Adrs_Line_1TextBox").removeAttribute('readonly', 'readonly');
document.getElementById("Postal_City_VillageTextBox").removeAttribute('readonly', 'readonly');
}
}
In this example I am assuming that you are using client id mode as static on the controls mentioned in the JavaScript, if it is not then you may use <%# xxxx.ClientID%> blocks to access their IDs

Have value in a script variable how to pass it in asp controls

<script type="application/javascript">
function getgeoip(json) {
var a = json.ip;
document.write(a);
document.write("Geolocation information for IP address : ", json.ip);
document.write("Country : ", json.country);
document.write("Latitude : ", json.latitude);
document.write("Longitude : ", json.longitude);
}
</script>
<script type="application/javascript" src="http://www.telize.com/geoip?callback=getgeoip"></script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="lblip" runat="server"></asp:Label><br />
<asp:Label ID="lblcountry" runat="server"></asp:Label><br />
<asp:Label ID="lbllatitude" runat="server"></asp:Label><br />
<asp:Label ID="lbllongitude" runat="server"></asp:Label>
</div>
Please help me how can I get the value in variable a into any of the asp labels.
In short help me to assign a asp control with a scripting variable
It is little bit unclear what you are asking, i guess you need to assign value of variable a to your label.
then you can use
document.getElementById("lblip").innerHTML=a;
something like this
DEMO
IF you what a jquery solution then try below
$('#lblip').html(a);
You can assign use this code :
document.getElementById('<%= lbllongitude.ClientID%>').value = a;
The ClientID property is globally unique among all controls defined in an ASP.NET page.
Use jquery code
$('#<%=lbllongitude.ClientID%>').html(yourData);
get the element based on its ID that's why we use the selector '#'.
The control we want to get is an asp tag not a pure html tag.
so to get the real Id generated on DOM use <%=lbllongitude.ClientID%>
Finally we use the .html() (.innerHtml() in javascript) function because the <asp:Label> is the equivalent of a <span>.
Actually I tried to use json script to get the Ip of the viewers and I was able to show it in alert but was no able to capture it ina label or textbox.I fetched the ip of the viwers in an alternative manner now not with json. Went for sever side code and it did my pupose.
ipAddress = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (string.IsNullOrEmpty(ipAddress))
{
ipAddress = Request.ServerVariables["REMOTE_ADDR"];
}
else
{
Response.Write(ipAddress);
}
In this way I saved the Ip of the viewers in my database and it is successfully working.
Thank you all for helping with answers

Access ASP.NET Literal value from Javascript

How can I access the value of an ASP.NET Literal control from JS. I have the below but it doesn't work:
var companyname = document.getElementById('litCompanyName').text;
var companynumber = document.getElementById('litCompanyNumber').text;
Thanks
You must public your literal in a webform/view, because you can't public asp.net code in .js files, you can do something like this:
<script>
var litCompanyName = <%= [YOUR LITERAL]; %>
</script>
and then use it
In Asp.net When Page is Going to Rendered it will change its ID in Html.
Check Html of Page using FireBug in Mozilla Firefox.
example of label
<asp:Label ID="SaveTime" runat="server"></asp:Label>
var companynumber= document.getElementById('<%=SaveTime.ClientID%>').Text
and For Literal You Need to Wrap with div or span
<span id="yourId"><asp:Literal ID="SaveTime" runat="server"></asp:Literal></span>
js:
var value= document.getElementById('yourId').innerText;
The short answer is that you can't. A literal control is just that. The value in the Text property is 'literally' outputted to the response stream.
You can either set a hidden field or use a Label. Just remember, referencing ASP.NET controls from Javascript, it's easier to use ClientIDMode="Static" or wrap your literal in a span with an ID.
For example:
litCompanyName.Text = "<span id=\"company-name\"> + Company.Name + </span>";
Then in your JS
var companyname = document.getElementById('company-name').text;
The literal control only exists on the server side, when the page is rendered it's only the text of the control that ends up in the page. So if you have:
The company name is <asp:Literal ID="litCompanyName" runat="server" Text="Google" />
all that ends up in the HTML code is:
The company name is Google
To access the text from Javascript you need an element around the text, for example:
<span id="CompanyName"><asp:Literal ID="litCompanyName" runat="server" /></span>
Now you can use document.getElementById('CompanyName').innerHTML to get the text from the literal.

How Do I Pass ASP.NET Control Name to Javascript Function?

I have Googled this to death and found lots of 'answers', but none of them will work for me, so maybe you clever people could give me a 'definitive' answer?
I have a Javascript function:
function enableSaveLink() {
document.getElementById('<%= btnSaveLink.ClientID %>').removeAttribute('disabled');
}
This works fine, but obviously it is hard-coded to enable a particular control on my page. What I'd like is to be able to call this function from any control on the page, passing the name of the control I'd like to enable as a variable. So, in an ideal world, my Javascript function would look like this:
function enableControl(ctl) {
document.getElementById(ctl).removeAttribute('disabled');
}
And I'd call it like this:
<asp:button id="btnTestButton" runat="server" Text="Click Me" onclientclick="enableControl('txtTestTextbox') />
<asp:button id="txtTestTextbox" runat="server" enabled="false />
I know the way I've passed the control name would never work, but I've tried passing it in all different ways and none work, so this is just for the purposes of illustration. Can anyone tell me how to actually make this work?
You need to use the ClientID property of the control.
This will help:
<asp:button id="btnTest" runat="server" Text="Click Me"
onclientclick="enableControl('<%= lblTest.ClientID %>') />
Use the this reference (more info here):
<asp:button id="btnTest" runat="server" Text="Click Me" onclientclick="enableControl(this);" />
Then in your script:
function enableSaveLink(elem) {
elem.removeAttribute('disabled');
}
Here you are passing a reference to the object calling the function to the function, you can then just set the attribute on the element rather than finding it in the DOM.
EDIT - Just realised what your intended usage is. If you're looking to fire an event from a disabled element when clicked, then you can't do this from the element. It would need to be handled from some other enabled element. The above method works fine if you intend to disable the element when clicked - but not enable the element when clicked.
EDIT - Just to accompany my comment, if you have a uniform structure like this (i.e. where all inputs have a corresponding label - or even button) then:
<div>
<label onclick="activateSibling(this);">Input One:</label>
<input type="text" />
</div>
You could try this:
function activateSibling(label) {
label.nextSibling.removeAttribute("disabled");
}
I've made a jsFiddle demonstrating my concept in jQuery which seems to work fine.
EDIT - OK, last idea. What about custom attributes. You could add a target attribute to your clickable element which contains the Id you're going to enable, like so:
<label target="active_me" onclick="activate(this);">Click to activate</label>
<input type="text" id="active_me" disabled="disabled" />
And your script:
function activate(label) {
var inputId = this.getAttribute("target");
var input = document.getElementById(inputId);
input.removeAttribute("disabled");
}
Although, it's starting to feel like we're fighting against the technology a little and we're not too far removed from ctrlInput.ClientID. But I suppose this makes your markup a little cleaner and gives you a function that's bindable en masse.
Ok, I've cracked it. There are probably more ways than one to do this, but this is fairly elegant.
My Javascript function:
function enableControl(ctl) {
document.getElementById(ctl).removeAttribute('disabled');
}
My ASP.NET markup:
<asp:Button ID="btnTestButton" runat="server" Text="Click to enable" OnClientClick="enableControl('txtTestTextbox');" />
<asp:TextBox ID="txtTestTextBox" runat="server" enabled="false" ClientIDMode="Static" />
The key is the ClientIDMode property, which, when set to static, means that the control's client-side ID when it is rendered will match the ID you give it in markup. If it's within a naming container you may need to include that in the variable passed in the function call. See here for more info about ClientIDMode.
Anyway, this works for me! Thanks for your input, everyone.
ClientID is used for getting server side control on javascript.
var element=document.getElementById('<%=lblTest.ClientID%>');

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