Hai frnds , i want to show the message on button click....please help advance thanks
use javascript, set an click event and change the text of the button....
You mean like the javascript client-side handler?
onclick="alert('Hi there!')"
Try this code
<head>
<script type="text/javascript" language="javascript">
function message() {
alert("THIS IS A MESSAGE!!!");
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<button onclick="message()">MESSAGE</button>
</div>
</form>
</body>
</html>
And you can try JQUERY DIALOG: http://jqueryui.com/demos/dialog/
You can use OnClientClick attribute to specify javascript that will runs before postback request
if you want change text on button:
<asp:Button Text="Click me!" runat="server" ID="TestButton" OnClick="TestButton_Click" OnClientClick="(this).value = 'new message'" />
if you want show message box :
<asp:Button Text="Click me!" runat="server" ID="TestButton" OnClick="TestButton_Click" OnClientClick="alert('message')" />
"display message in button click during postback" means i assume OP wants to show message based on condition at server side during click event of button in postback.
this can be achieved using method
Page.ClientScript.RegisterStartupScript(
Type type,
string key,
string script,
bool addScriptTags)
see complete code sample at http://msdn.microsoft.com/en-us/library/z9h4dk8y.aspx
Related
I want to change some text in a text box on the change of another text box. I know it can be done using ontextchanged event. But my requirement is that for example. Lets take an example of converting meter to KM.
When I type 1000 in a text box without leaving that text box I need to have the value as 1 KM in other.
Now, I change 1000m to 3000m (without having the ontextchanged event fired up) and I should see 3 KM in the other text box.
In short I don't want the text box to be posted back. I know this can be done in Windows project but how it can be done in asp.net (web based). Is there any JavaScript or jQuery?
Please Help. Thanks in advance.
Hope this helps
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<script src="/js/jquery-1.7.2.min.js" type="text/javascript"></script>
<script language="javascript" type="text/javascript">
function Convert() {
var meters = jQuery("#txtMeters").val();
var kilometers = meters / 1000;
jQuery("#txtKilometers").val(kilometers);
}
</script>
<title>Solution</title>
</head>
<body>
<form id="form1" runat="server">
<div>
Meters
<asp:TextBox ID="txtMeters" ClientIDMode="Static" runat="server" onkeyup="javascript:Convert()">
</asp:TextBox>
/
<asp:TextBox ID="txtKilometers" ClientIDMode="Static" runat="server">
</asp:TextBox>Kilometers
</div>
</form>
</body>
</html>
http://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_onkeypress
<script>
function myFunction()
{
alert("You pressed a key inside the input field");
// get value of textbox1, sdo the calculation
// set value of textbox2
var x = document.getElementById('textbox1').value;//get integer part of value
document.getElementById('textbox2').value = x/1000 + 'km';
}
</script>
<input type="text" id="textbox1" onkeypress="myFunction()">
<input type="text" id="textbox2">
Call (even better bind it to textBox event) JavaScript/jQuery function to covert from text in first text box and put in second text box.
How to bind event? See it here..
Jquery text change event
http://api.jquery.com/change/
try this jquery solution
add jquery library
<asp:TextBox runat="server" ID="TextBox1" runat="server"/>
<asp:TextBox runat="server" ID="TextBox2" onkeyup="callFunction()" runat="server"/>
<script type="text/javascript">
function callFunction() {
var TextBox2_val = $('#<%= TextBox2.ClientID %>').val();
$('#<%= TextBox1.ClientID %>').val((parseFloat(TextBox2_val) / 1000).toString());
}
</script>
i am using bootstrap in my c# asp.net project and i want to show to show the modal popup from code behind.
in my page header i have a javascript function as follows:
function LoginFail() {
$('#windowTitleDialog').modal('show');
}
and on the click of my button i am calling the javascript as follows
ScriptManager.RegisterClientScriptBlock(this, typeof(System.Web.UI.Page), "LoginFail", "LoginFail();", true);
this does not show the modal popup. however, if i use something like alert('login failed'), it works fine.
can anybody please help with this?
By default Bootstrap javascript files are included just before the closing body tag
<script src="vendors/jquery-1.9.1.min.js"></script>
<script src="bootstrap/js/bootstrap.min.js"></script>
<script src="vendors/easypiechart/jquery.easy-pie-chart.js"></script>
<script src="assets/scripts.js"></script>
</body>
I took these javascript files into the head section right before the body tag and I wrote a small function to call the modal popup:
<script src="vendors/jquery-1.9.1.min.js"></script>
<script src="bootstrap/js/bootstrap.min.js"></script>
<script src="vendors/easypiechart/jquery.easy-pie-chart.js"></script>
<script src="assets/scripts.js"></script>
<script type="text/javascript">
function openModal() {
$('#myModal').modal('show');
}
</script>
</head>
<body>
then I could call the modal popup from code-behind with the following:
protected void lbEdit_Click(object sender, EventArgs e) {
ScriptManager.RegisterStartupScript(this,this.GetType(),"Pop", "openModal();", true);
}
This is how I solved:
The Script function
<script type="text/javascript">
function LoginFail() {
$('#windowTitleDialog').modal();
}
</script>
The Button declaration
<asp:Button ID="LaunchModal" runat="server" Text="Launch Modal" CssClass="btn" onclick="LaunchModal_Click"/>
Notice that the attribute data-togle="modal" is not set.
The Server-side code in the LaunchModal_Click event is:
ScriptManager.RegisterStartupScript(this, this.GetType(), "LaunchServerSide", "$(function() { LoginFail(); });", true);
I hope this help you.
I assume, you are using one of jQuery modal plugins. In that case, I suspect, plugin code isn't initialized at the time it is called (which would be immediately after it is rendered into page). You have to postpone call to the function after plugin code is executed. Implementation for your case might look like this:
ScriptManager.RegisterClientScriptBlock(this, typeof(System.Web.UI.Page), "LoginFail", "$(function() { LoginFail(); });", true);
I have the same problem, tried to find online solution but i was unable to do so. I am able to call other javascript funcionts as you said from the code behind but when i add the modal js function the modal does not show up.
My guess is that the modal.('show') function is not being call because when i insepct in crhome the modal element the class is modal hide fade and not modal hide fade IN and other attributes stay the same.
A possible solution is to change those attributes from the code behind, i mean you can do what the js does from the code behind, possible not the best solution but i did not what else to do. By doing this i got the modal to show up with the background grey but could not make the effect to work.
I do this in the aspx page:
<asp:Panel ID="MessagePanel" runat="server" CssClass="hide" EnableViewState="false">
<div class="modal-header">
<asp:Button type="button" ID="btnClose" runat="server" data-dismiss="modal" Text="x" />
</div>
<div class="modal-body">
<h4>What's new in this version</h4>
... rest of bootstrap modal stuff....
</div>
</asp:Panel>
Then in code-behind to show the modal popup on any event such as page.load or a button click I just change the CssClass of the Panel:
MessagePanel.CssClass = "modal fade in"
No need for js or ScriptManager.
I want to know all possible ways to trigger a button in jQuery, I tried this but it's not working,
$("#<%=btA.ClientID%>").trigger('click');
Note: its a ASP.Net button and what I want is to trigger button click so that it will trigger a code-behind click method of buttonA.
Try this
$("#<%=btA.ClientID%>").click();
if it doesn't work try to alert this and check if it is getting accessed by JQ
alert($("#<%=btA.ClientID%>").length);
Have you registered the event with jquery in following manner
$(function(){
$("#<%=btA.ClientID%>").click(function(){
// your logic here
});
});
One more thing to confirm, are you loading this button directly on page load or you are having some page update panel which load it afterwords?
If yes then you should bind the event to button in following manner
$(document).on('click',"#<%=btA.ClientID%>", function() {...});
$("#<%=btA.ClientID%>").click();
Or
$("input[id$='yourbuttonId'").click();
Reason that trigger not working is Jquery only allow you to trigger a click that Jquery has created. Use the trigger route after you have written a click listener.
Its beats me since it should be a very straightforward thing. I actually just tried it out and it worked without a hitch. Here is my markup:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#<%=btA.ClientID%>").trigger('click');
});
</script>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="lbA" runat="server"></asp:Label>
<asp:Button ID="btA" runat="server" OnClick="btA_Click" Text="Click Me!" />
</div>
</form>
</body>
</html>
... and I have this method in my code behind:
protected void btA_Click(object sender, EventArgs e)
{
lbA.Text = "Hello World!";
}
When the application runs, it triggers the click event of the btA button fires immediately and the Hello World! text is rendered on the label. Check if you could be missing something.
$("#<%=btA.ClientID%>").click();
I believe this is the only other way.
May be you are trying to wire the event,when the control itself is not loaded on to the page.
Try this instead.It buys a little bit of time and then wires up the event.
setTimeout(function () {
$("#<%=btA.ClientID%>").trigger('click');
}, 10);
I always make ClientIdMode="static" so that you can easily call the element with the same id you configured in the page..
So you dont hvae to use ClientID.. More over you cant use asp.net code in a separate js file.
$("#<%=btA.ClientID%>").trigger('click');
to
$("#btA").click();
I've got an issue with a messagebox user control. I wish for a control which can be given a message and the user can dismiss with a click of a button, which can be inserted into many places.
I have applied the javascript into the messagebox control in a hope i can keep everything to do with the messagebox centralized, however when browsing to a page with the messagebox control added i get this error:
CS1061: 'ASP.components_messagebox_ascx' does not contain a definition for 'HideBox' and no extension method 'HideBox' accepting a first argument of type 'ASP.components_messagebox_ascx' could be found
The control is as thus:
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="Messagebox.ascx.cs" Inherits="FosterNetwork.Components.Messagebox" %>
<script type="text/Javascript">
function HideBox() {
document.getElementById("PNL_Messagebox").setAttribute("visible", false);
}
</script>
<asp:Panel ID="PNL_Messagebox" runat="server">
<asp:Label ID="LBL_Message" runat="server" />
<asp:Button ID="BTN_Ok" Text="Ok" OnClick="HideBox()" runat="server" /> <!--Error happens on this line-->
</asp:Panel>
I'm fairly certain i've done this right but obviously i've done something wrong if it's not working. Any light on the situation at all would be grand.
Addendum: If i comment out the Button control the page loads fine, and the script loads fine too (Viewed page source)
The control ID's you're referencing are not the client ID's, but server ID's. So retrieve the 'ClientID' from the control in the JavaScript function and second, use the 'OnClientClick' property to show the JavaScript message.
<%# Control Language="C#" AutoEventWireup="true" CodeBehind="Messagebox.ascx.cs" Inherits="FosterNetwork.Components.Messagebox" %>
<script type="text/Javascript">
function HideBox() {
document.getElementById("<%= PNL_Messagebox.ClientID %>").setAttribute("visible", false);
}
</script>
<asp:Panel ID="PNL_Messagebox" runat="server">
<asp:Label ID="LBL_Message" runat="server" />
<asp:Button ID="BTN_Ok" Text="Ok" OnClientClick="HideBox()" runat="server" /> <!--Error happens on this line-->
</asp:Panel>
Onclick looks for a server side function, and not javascript. either, define your button as <input type='button' onclick='HideBox' or change the current code to:
<script type="text/Javascript">
function HideBox() {
document.getElementById("<%= PNL_Messagebox.ClientID %>").setAttribute("visible", false);
return false;
}
</script>
<asp:Button ID="BTN_Ok" Text="Ok" OnClientClick="return HideBox()" runat="server" />
returning false in OnClientClick, prevents the asp button from postback.
Edit: as Monty mentioned, your panel control's client id is not correctly set in your code.
On a ASP.Net page, I am in front of a problem only with IE. Here is the description.
On a page, there is two buttons and one label. The first button is visible and calls a JS function on the click event. This JS function calls the click function of the second button. The second button has an C€ event handler on the click event. The C# event handler edit the label.
In Firefox : the label is correctly edited after the clicks.
In IE (8) : the label is not edited, despite the C€ event handler has been correctly hit.
Also, I observed, in IE, that the Page_Load event is called two times after the JS button click :
Page_Load
button2_OnClick => change of the Label Text
Page_Load => The Label Text is reset :(
In Firefox, the Page_Load is called only once.
My question is : how to make IE refresh correctly the page as Firefox does after a JS button click ?
Below is the sample test code :
1) Page ASPX
<head runat="server">
<title></title>
<script type="text/javascript">
function button1Click(sender, args) {
var button2 = document.getElementById("button2");
button2.click();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button runat="server" ID="button1" Text="Click-me!" OnClientClick="button1Click();" />
<asp:Button runat="server" ID="button2" Text="Second" OnClick="button2_OnClick" style="display:none" />
<p />
<asp:Label runat="server" ID="label1" Text="Init" />
</div>
</form>
</body>
</html>
2) C# code-behind :
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void button2_OnClick(object sender, EventArgs e)
{
label1.Text = "Changed";
}
}
The ID of your button will not be button1 or button2 when it's rendered. It will probably be something like ctl001_button1. Therefore your javascript will not work. In ASP.NET 4 you can override this behaviour by using an assigned ClientID.
<asp:Button runat="server" ID="button1" Text="Click-me!"
OnClientClick="button1Click();" ClientIDMode="Static" />
<asp:Button runat="server" ID="button2" Text="Second"
OnClick="button2_OnClick" style="display:none" ClientIDMode="Static" />
As an aside, this alludes to the main problem with ASP.NET Winforms - it tricks developers into thinking that the web is a connected environment.
What actually happens when you click an <asp:Button /> element by default is that a postback is invoked. I.e. Your browser sends a request to the server for a new page. It sends up something called ViewState which is how the server knows what you've done and what to render. There is no "event" handled as such.
I think the problem is with the way you are trying to get the hidden button
var button2 = document.getElementById("button2");
maybe change this to
var button2 = document.getElementById("<%= button2.ClientID %>");
After the buttons are rendered in the browser, the ID is changed by the ASP.Net engine, and not the same as your source.
http://msdn.microsoft.com/en-us/library/system.web.ui.control.clientid.aspx
Hope this helps.