<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<script type="text/javascript">
function Incrementer()
{
debugger;
var txtBox = document.getElementById('ctl00_MainContent_TextBox1').value;
alert(txtBox);
}
</script>
<asp:TextBox ID="TextBox1" runat="server" Text="0"></asp:TextBox><br />
<asp:Button ID="Button1" runat="server" Text="Up" OnClientClick="Incrementer();"/>
<asp:Button ID="Button2" Text="Down" runat="server"/>
</asp:Content>
I am unable to capture the textbox in JavaScript. What is the problem?
I've re tagged this ASP.net as well because it's quite specific to this problem.
When an ASP.net textbox control is rendered on a page it is assigned a dynamic ID that can change. There is a property for controls, ClientID that provides you with the controls assigned ID so you can use it in your scripts.
Use as follows:
<script type="text/javascript">
function Incrementer()
{
debugger;
var txtBox = document.getElementById('<%=TextBox1.ClientID%>').value;
alert(txtBox);
}
</script>
Try this
var txtBox = document.getElementById('<%=TextBox1.ClientID%>').value;
alert(txtBox);
Related
I need to set up asp textbox with a value from javascript input.
i have here:
<td ><asp:TextBox ID="AddressTextBox" runat="server" Text='<%# Bind("Address") %>' ClientIDMode="Static" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
ControlToValidate="AddressTextBox" ErrorMessage="*"
ValidationGroup="InsertCustomer" SetFocusOnError="True"></asp:RequiredFieldValidator>
</td>
I use autocomplete address form from here
so i placed this to the javascript code:
var src = document.getElementById("autocomplete");
var dst = document.getElementById("AddressTextBox");
and this to function fillInAddress() funcion:
function fillInAddress() {
// Get the place details from the autocomplete object.
var place = autocomplete.getPlace();
for (var component in componentForm) {
document.getElementById(component).value = '';
document.getElementById(component).disabled = false;
dst.value = src.value;
}
Im trying to get the full address from the autocomplete to the AddressTextBox field as soon as the address is selected.
But im getting an error that AddressTextBox "The name 'AddressTextBox' does not exist in the current context"
Any ideas? thanks.
AddressTextBox is server control so the ID might be changed.
Try as:
var dst = document.getElementById("<%=AddressTextBox.ClientID%>").value;
This may resolve your error.
Just run this working piece of code, this might help you:
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1.Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function setValues()
{
document.getElementById('dest').value=document.getElementById('src').value;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="src" runat="server"></asp:TextBox>
<asp:TextBox ID="dest" runat="server"></asp:TextBox>
<input type="button" value="Set Value" onclick="setValues()" />
</div>
</form>
</body>
</html>
Now you can customise the solution as per your requirement.
It looks that I made it work. I just added the following:
document.getElementById('ctl00_maincontent_FormView1_AddressTextBox').value = document.getElementById('autocomplete').value;
into function fillInAddress()
I have mentioned my code below, the problem is I am unable to clear textbox. Kindly see my javascript code for textbox clearing and piont out the error?
<script type="text/javascript">
function CancelClick() {
document.getElementById("<%=txtname.ClientID %>").innerHTML =txtname.Text='';
}
</script>
<asp:UpdatePanel ID="updatepanel1" runat="server"><ContentTemplate>
<div>
<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">
</asp:ToolkitScriptManager>
<asp:UpdatePanel ID="updatepanel2" runat="server">
</asp:UpdatePanel>
<asp:Button ID="btnConfirm" runat="server" Text="Confirm" onclick="btnConfirm_Click" />
<asp:ConfirmButtonExtender ID="ConfirmButtonExtender1" TargetControlID ="btnConfirm"
ConfirmText ="Are you sure you want to click this?" OnClientCancel ="CancelClick"
ConfirmOnFormSubmit="false" runat="server">
</asp:ConfirmButtonExtender>
<asp:TextBox ID="txtname" runat="server"></asp:TextBox>
</div>
</ContentTemplate>
</asp:UpdatePanel>
With jQuery (as you asked for)
<script type="text/javascript">
function CancelClick() {
$("#<%=txtname.ClientID %>").val("");
}
</script>
You need to set the value not the innerHtml:
document.getElementById("<%=txtname.ClientID %>").value = '';
<script type="text/javascript">
function CancelClick() {
var textBoxId = '<%= #txtname.ClientID %>';
$(textBoxId).val('');
}
</script>
I want to reset the text box through client side using javascript. I used following ways to reset the textbox. But, they are not resetting.
cText = "";
document.getElementById("<%=txtText.ClientID %>").value = cText;
and
document.getElementById("<%=txtText.ClientID %>").value = "";
Please can anyone help me in this?
code:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<script type="text/javascript">
function validate() {
var cText = document.getElementById('<%=txtText.ClientID %>').value;
if (cText != "") {
alert("Text is not null.");
document.forms['UserMaster'].elements['txtText'].focus();
$("#<%=txtText.ClientID %>").val("");
return false;
}
return true;
};
</script>
</head>
<body>
<form id="form" runat="server">
<div class="page">
<asp:TextBox ID="txtText" runat="server"></asp:TextBox>
<br/>
<asp:Button ID="btnSubmit" runat="server" Text="Submit" Font-Bold="true" OnClientClick="return validate()"
ForeColor="#9370DB" Height="23px" Width="65px" OnClick="btnSubmit_Click"
/>
<br />
</div>
</form>
</body>
</html>
Here is the solution for your issues:
document.getElementById('<%=txtText.ClientID %>').value='';
you were using double quotes which was not working for you, whereas you need to use single quotes as show in the above code. This was your issues.
.value=" "; //is Wrong
Happy Coding.
I had the same problem and using this helped me solve the issue.
Here you can inspect the control from the browser and get the ID of that control.
// ControkClientID is the ID from Inspect element
document.getElementById(ControlClientID).value='';
I'm trying to download a file if user clicks a button which is in UploadPanel. I'm following a forum page that was suggested here.
When I run my ASP.NET page, I get alert 1 and 2 but not 3. What would be the problem? Here is my code:
Default.aspx
<body>
<form id="form1" runat="server">
<asp:ScriptManager runat="server" />
<script language="javascript">
var prm = Sys.WebForms.PageRequestManager.getInstance();
alert(1);
prm.add_initializeRequest(InitializeRequest);
alert(2);
function InitializeRequest(sender, args)
{
alert(3);
if (sender._postBackSettings.sourceElement.id == "DownloadFile")
{
var iframe = document.createElement("iframe");
iframe.src="GenerateFile.aspx";
iframe.style.display = "none";
document.body.appendChild(iframe);
}
}
</script>
<asp:UpdatePanel runat="server">
<ContentTemplate>
<asp:Button runat="server" ID="DownloadFile" Text="Generate File" />
</ContentTemplate>
</asp:UpdatePanel>
</form>
it could be a problem if your Button Id is not matching because server and client id not same
you should use this
<asp:Button runat="server" ID="DownloadFile" ClientIDMode="Static" Text="Generate File" />
I'm using markdown and I've got some input such as **test** which makes the word test appear in bold test and I've converted it with html like so"
var converter1 = Markdown.getSanitizingConverter();
var editor1 = new Markdown.Editor(converter1);
editor1.run();
var d = document.getElementById("wmd_input");
var html = converter1.makeHtml(d.value);
alert(html);
And this alerts <b>test</b> the issue is I need to take this value, namely <b>test</b> and access this via server side code (asp.net). I tried assigning it to a variable like so:
document.getElementById("Label1").value = html;
But it doesn't seem to work, when I go to the code behind it shows Label1 as being empty.
Is this possible?
Edit
I tried to change it to a hidden field same issue:
<script type="text/javascript">
(function () {
var converter1 = Markdown.getSanitizingConverter();
var editor1 = new Markdown.Editor(converter1);
editor1.run();
var d = document.getElementById("wmd_input");
var html = converter1.makeHtml(d.value);
alert(html);
document.getElementById('<%= h1.ClientID %>').value = html;
var h = document.getElementById('<%= h1.ClientID %>');
alert(h.value);
})();
</script>
The issue I have is I have an asp.net server side button that when clicked I try to do this:
Label1.Text = h1.Value;
That is to store the value from the hidden field to a label but this doesnt work. When I put a break point in it shows h1 is empty ""....So I'm not sure what event or how to do this so that when I make changes to my textarea wmd_input that i should be able to see these changes in my server side code...
Here's my entire asp.net form:
<html>
<head>
<title>PageDown Demo Page</title>
<link rel="stylesheet" type="text/css" href="css/demo.css" />
<script type="text/javascript" src="js/Markdown.Converter.js"></script>
<script type="text/javascript" src="js/Markdown.Sanitizer.js"></script>
<script type="text/javascript" src="js/Markdown.Editor.js"></script>
</head>
<body>
<form id="myForm" runat="server">
<div class="wmd-panel">
<div id="wmd-button-bar"></div>
<textarea cols="5" rows="5" id="wmd_input" class="wmd-input" runat="server"></textarea>
<div id="wmd_preview" class="wmd-panel wmd-preview" runat="server"></div>
</div>
<asp:button id="Button1" runat="server" Text="Set" onclick="Button1_Click"></asp:button>
<asp:button id="Button2" runat="server" Text="Get" onclick="Button2_Click"></asp:button><asp:label id="Label1" runat="server">Label</asp:label>
<asp:HiddenField ID="h1" runat="server" EnableViewState="true" />
<script type="text/javascript">
(function () {
var converter1 = Markdown.getSanitizingConverter();
var editor1 = new Markdown.Editor(converter1);
editor1.run();
var d = document.getElementById("wmd_input");
var html = converter1.makeHtml(d.value);
alert(html);
document.getElementById('<%= h1.ClientID %>').value = html;
alert(document.getElementById('<%= h1.ClientID %>').value);
})();
</script>
</form>
</body>
</html>
The asp:Label tag isn't an input control, so it won't get posted back to the server. I'd suggest using asp:HiddenField or asp:TextBox instead. (And Adil's point is crucial too, you need to make sure the client ID is actually what you think it is.)
Here's a test that works for me. On the first page load, the label shows "initial value", but the alert shows "updated". After postback, the label also shows "updated".
Edit Added the client-side update logic inside a client-side event handler.
<%# Page Title="Test" Language="C#" AutoEventWireup="true" %>
<script runat="server">
void Page_Load()
{
l1.Text = h1.Value;
}
</script>
<html>
<body>
<form runat="server">
<asp:HiddenField runat="server" Value="initial value" ID="h1" />
<asp:Label runat="server" ID="l1" />
<asp:Button runat="server" Text="do postback" />
</form>
<script>
document.getElementById('<%= Button1.ClientID %>').onclick = function () {
document.getElementById('<%= h1.ClientID %>').value = 'updated';
alert(document.getElementById('<%= h1.ClientID %>').value);
};
</script>
</body>
</html>
Labels don't post. You will have to use an input or textarea element (<asp:TextBox>). If you don't want the user to see the markup source, you can also use an <asp:HiddenField>.
you should be able to do what you want to do by using knockoutjs http://knockoutjs.com/examples/helloWorld.html You can use element binding.