I have jquery code on cc.js that I need to execute when an asp.net button is clicked.
The code on cc.js has a variable called settings and then submits these settings to an API (POST action) with the following code:
'Transaction Submit'
$.ajax(settings).done(function (response) {
console.log(response);
});
Basically I need this button <asp:Button ID="BtnSubmit" runat="server" Text="Submit" /> to execute that jquery code. How can I do so?
You are looking for the OnClientClick property
<asp:Button ID="BtnSubmit" runat="server" OnClientClick="JSFunctionName(); return false;" Text="Submit" />
You will need to add the additional return false statement to prevent a post back from occurring if you button element is located inside a form.
This is assuming you want to decouple your front end html from your js code by using an inline call. If that is not the case then you mod your cc.js to autobind on the element as others have mentioned. One thing they left out is that in that process is that IF you button is inside a form then you need to prevent the auto-post back like so:
$(document).ready(function() {
$("#BtnSubmit").click(function(){
JSFunctionName();
e.preventDefault();
});
});
If the ID of the button is BtnSubmit, then you should be able to add a event handler like this.
$(document).ready(function() {
$("#BtnSubmit").click(function(){
alert("button clicked - do stuff here.");
});
});
change the alert("button clicked - do stuff here."); to your ajax request code.
You can write the following code to create an event on Button click to call the jquery method..
Basically, you take the ID by $("#btnSubmit") and on its click event write your Ajax function.
$("#BtnSubmit).on('click',function() {
// your ajax code here
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<asp:Button ID="BtnSubmit" runat="server" Text="Submit" />
Hope this helps.
Just Add a click event with your button id using jquery..
$("#BtnSubmit").on('click',function(){
console.log('success...');
//ajax call here...
});
You can use Ajax within JS functions. I'm not sure what version of .NET you're using, but I'll answer with what I know for MVC 5.
Here's how I would do it:
HTML
<button id="SubmitBtn">Submit</button>
JS(JQuery)
$('#SubmitBtn').on('click', function () {
//Transaction Submit
$.ajax({
type: "POST",
url: '/ProjectName/Controller/Method',
data: { methodParameter1: data1, methodParameter2: data2 },
success: function (data) {
//do whatever
}
error: function (response) {
//do whatever
}
});
});
Related
I am new to C# and ASP.NET. I have a jQuery yes/no dialog that calls serverside methods (code-behind) using postback.
I put the code together using some snippets I've found on the internet, but I don't fully understand how the code is working.
If I click "yes" in the jQuery dialog, then the server-side C# method DeleteConfirmedServerside is called.
However I don't understand why it works because in the rendered html code I don't see a reference to the server-side method.
I've read some articles about javascript postback... but still I don't understand why the following code works:
.aspx file
// jQuery code (Dialog with yes/no Buttons)
buttons: [
{
id: "Yes",
text: "Yes",
click: function ()
{
$("#btnDeleteConfirmedClientside").click();
}
},
....
<asp:Button ID="btnDeleteCanceledClientside" runat="server"
OnClick="DeleteCanceledServerside" Text="DeleteCanceled"
UseSubmitBehavior="false" style="display:none"/>
<asp:Button ID="btnDeleteConfirmedClientside" runat="server"
OnClick="DeleteConfirmedServerside" Text="DeleteConfirmed"
UseSubmitBehavior="false" style="display:none" />
<div id="myDialog" style="display: none" >
Do you want to delete this record?
</div>
Code-behind (server side)
protected void DeleteConfirmedServerside(object sender, EventArgs e)
{
// called by postback from clientside
ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('Delete confirmed (YES).')", true);
}
Rendered HTML client side:
function __doPostBack(eventTarget, eventArgument) {
if (!theForm.onsubmit || (theForm.onsubmit() != false)) {
theForm.__EVENTTARGET.value = eventTarget;
theForm.__EVENTARGUMENT.value = eventArgument;
theForm.submit();
}
}
...
<input type="button" name="btnDeleteCanceledClientside" value="DeleteCanceled"
onclick="javascript:__doPostBack('btnDeleteCanceledClientside','')"
id="btnDeleteCanceledClientside" style="display:none" />
<input type="button" name="btnDeleteConfirmedClientside" value="DeleteConfirmed"
onclick="javascript:__doPostBack('btnDeleteConfirmedClientside','')"
id="btnDeleteConfirmedClientside" style="display:none" />
<div id="myDialog2" style="display: none" >
Do you want to delete this record?
</div>
If the user clicks "yes" in jQuery dialog, then btnDeleteConfirmedClientside is "clicked" and then __doPostBack('btnDeleteConfirmedClientside&...) is called (at least this is what I understand)
What I don't understand is this in the rendered html:
onclick="javascript:__doPostBack('btnDeleteConfirmedClientside','')
Why is __doPostBack using btnDeleteConfirmedClientside and not the server-side code-behind method DeleteConfirmedServerside?
DeleteConfirmedServerside is called - but how is this happening, since nowhere in the HTML I see a reference to serverside methods... so how is the C# code-behind method DeleteConfirmedServerside called ?
The __doPostBack javascript method makes a post back to the server, effectively requesting that your server side method be called.
The hanlding of this HTTP post request is handled behind the scenes and calls your server side method.
If you're new to asp.net, I recommend that you start by having a look at http://www.asp.net/mvc and use asp.net mvc rather than asp.net webforms which is what you're using. MVC is the latest and greatest and has many advantages over webforms.
Java script code:
<script type="text/javascript">
$(document).ready(function () {
$("#visualization").css('display', 'none');
});
</script>
<script type="text/javascript">
$('#info a').click(function drawVisualization() {
$("#visualization").css('display', 'block');
});
</script>
On load i am hidden the div and i want show the div by clicking the button
asp.net code:
<asp:Button ID="Button1" runat="server" Text="Button"
onclick='blue' />
c# CODE:
protected void blue(object sender, EventArgs e)
{
ClientScript.RegisterStartupScript(this.GetType(), "TestInitPageScript",
string.Format("<script type=\"text/javascript\">drawVisualization();</script>"));
}
i am fairly new to the coding;can anyone help me to solve this issue. After invisibling i am not able to show the visualization(div)
There's a much easier way to do this, which doesn't involve an entirely unnecessary post-back to the server. Something like this:
$('#<%= Button1.ClientID %>').click(function () {
$("#visualization").show();
});
This would assign a JavaScript click handler to the client-side rendered output of Button1. Of course, Button1 still causes a post-back, but since it doesn't need to do anything server-side it doesn't even need to be a server-side control. Make it something like this:
<input type="button" id="button1" value="Button" />
Then adjust the jQuery selector to use the client-side id:
$('#button1').click(function () {
$("#visualization").show();
});
If all you're doing is showing/hiding page elements, and you're already using JavaScript to do it, server-side code is entirely unnecessary.
you can use it like
Page.ClientScript.RegisterStartupScript(this.GetType(),"CallMyFunction","$('#visualization').css('display', 'block');",true);
<asp:Button ID="Button1" runat="server" Text="Button"
onclick='display()' />
<script>
function display()
{
$("#visualization").show();
}
</script>
$(document).ready(function () {
$("#visualization").css('display', 'none');
$('#Button1').click(function(){
$("#visualization").css('display', 'block');
});
});
I would just do it all on the client. Something like this would work.
$("#Button1").on("click", function(e){
$("#visualization").show();
});
If there's no reason to do a postback, you can do e.preventDefault(); after the call to .show();
Instead of Creating a Button OnClick event you can write a simple jquery or javascript to get the desired output
There are various ways to solve the above problem.
1)You can write OnClientClick attribute of Button control in asp.net and pass the value as
the javascript function name that you have created in the above code as drawVisualization()
and another important thing is that you will have to remove the runat="server" attribute because it causes the postback(means your page again reloads which will cause the div to hide)
2)You can create a jquery button click event
for eg:
First of all just create a simple function
function drawVisualization() {
$("#visualization").css('display', 'block');
});
and then the button click event
$('#button1').on( "click", function() {
drawVisualization(); //call the function that you have created to show the desired output
});
I'm trying to call a jquery function from a asp link button. Here is my link button html:
<div style="padding-left:75px">
<asp:LinkButton ID="lbAddCC" runat="server" ClientIDMode="Static" OnClick="ShowCCControls()" Text="Add CC"></asp:LinkButton>
</div>
Here is my jquery function:
function ShowCCControls() {
$('#lblCC').show();
$('#txtCC').show();
} //end ShowCCControls()
When I try to build, I get the error:
ASP.internal_email_aspx does not contain a definition for 'ShowCCControls' and no extension method 'ShowCCControls' accepting a first argument of type 'ASP.internal_email_aspx' could be found (are you missing a using directive or an assembly reference?)
I have this working on another page using a check box:
<asp:CheckBox ID="chkNew" TabIndex="8" runat="server" Text="New Tank" OnClick="SetNewTankControls()"
ClientIDMode="Static" />
Anybody see an issue? Thanks
Here is all of the javascript:
<script type="text/javascript" language="javascript">
//document.ready is used for jquery, waits until the doc is ready to be manipulated
$(document).ready(function () {
HideControls();
}); //end document.ready
function HideControls() {
$('#lblCC').hide();
$('#txtCC').hide();
$('#lblBCC').hide();
$('#txtBCC').hide();
} //end HideControls()
function ShowBCCControls() {
$('#lblBCC').show();
$('#txtBCC').show();
} //end ShowBCCControls
function ShowCCControls() {
$('#lblCC').show();
$('#txtCC').show();
} //end ShowCCControls()
OnClick is for specifying handlers in code-behind. If you want to specify a javascript function, you should use OnClientClick attribute.
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.linkbutton.onclientclick(v=vs.80).aspx
<div style="padding-left:75px">
<asp:LinkButton ID="lbAddCC" runat="server" ClientIDMode="Static" OnClientClick="ShowCCControls()" Text="Add CC"></asp:LinkButton>
</div>
You could just set the handler in your client script like this:
$('#lbAddCC').click(function() {
$('#lblCC').show();
$('#txtCC').show();
});
Since you're not intending to perform server side behaviours with this click event, there isn't any need to define a handler on the server control and then have it render out a call to the client side function when you could just call it directly.
EDIT:
You will of course need to couple the client side script with the removal of the erroneous OnClick handler on the server control as below:
<asp:LinkButton ID="lbAddCC" runat="server" ClientIDMode="Static" Text="Add CC"></asp:LinkButton>
it could be that the page load the function call before loading jquery code, make sure you put the jquery before the link button and reference jquery liabrary
I have an asp wizard on my page with three steps.
<asp:Wizard ID="wizardBestellen" runat="server" ActiveStepIndex="0" DisplaySideBar="False" onfinishbuttonclick="wizard_NextButtonClick" onnextbuttonclick="wizard_NextButtonClick" onpreviousbuttonclick="wizard_PreviousButtonClick">
<StartNavigationTemplate></StartNavigationTemplate>
<StepNavigationTemplate></StepNavigationTemplate>
<FinishNavigationTemplate></FinishNavigationTemplate>
<WizardSteps>
<asp:WizardStep runat="server" ID="step1" StepType="Start">
<uc1:control ID="uc1" runat="server" />
</asp:WizardStep>
<asp:WizardStep runat="server"ID="step2" StepType="Step">
<uc2:control ID="uc2" runat="server" />
</asp:WizardStep>
<asp:WizardStep ID="step3" runat="server" StepType="Finish">
<uc3:control ID="uc3" runat="server" />
</asp:WizardStep>
</WizardSteps>
</asp:Wizard>
Now every control has a next and a previous button which after the click validates your data and sends you to the next step. The buttons all look like:
<asp:LinkButton ID="bntPrevious" runat="server" CommandName="MovePrevious" CssClass="buttonOrange" CausesValidation="false"><span>Previous</span></asp:LinkButton>
<asp:LinkButton ID="btnNext" runat="server" CommandName="MoveNext" CssClass="buttonOrange" CausesValidation="true"><span>Next</span></asp:LinkButton>
So far it all works perfectly..
Now i wanted to disable the buttons after clicking on it and show a div with a loader image. So i created a div named divLoader and a javascript function which hides the div the buttons are in and shows the div with the loader.
function ToggleDiv(divButton, divLabel)
{
if (divButton.style.display == 'block')
{
divButton.style.display = 'none';
divLabel.style.display = 'block';
}
else
{
divButton.style.display = 'block';
divLabel.style.display = 'none';
}
}
But i can't get this to work. The ToggleDiv function works great in another situation, so thats not the problem.
I've tried calling the function from the OnClick attribute in the linkbutton but this gave me an error. I tried the OnClientClick, but this didn't work and i also tried setting the onclick attribute in the code behind, this also was a dead end.
Can anybody explain to me what i am doing wrong or is there another way to prevent users clicking the button twice?
Sounds like you're not getting the binding to work.
The first thing I would do is check the emitted control IDs by doing a view-source. Some implementation of the .NET framework add extra fluff to these control IDs, so can't guarantee that it will be the same as appears on the form.
Next, I would try some JavaScript late binding. If you have a JavaScript file, put it there. If not create one or add a JavaScript block to the foot of your form (create a new file for preference).
All this would be much easier with a JAvaScript lbrary such as jQuery, but for the moment lets assume you don't have one.
Add a window onload event handler
window.onload = function(){
//code to go here
}
Now add the click binding for your button:
window.onload = function(){
document.getElementById("***YOUR BUTTON ID***").onclick = function(){
ToggleDiv(this, document.getElementById("***YOUR LABEL ID***"));
}
}
I said this would be a little easer with jQuery, well, this is the equivalent implementation:
$(document).ready(function(){
$("#***YOUR BUTTON ID***").click(function(){
$(this).toggle();
$("#***YOUR LABEL ID***")).toggle();
});
});
The above sample removes the need for your ToggleDiv function entirely.
I'm trying to submit a form using AJAX to stop the browser from refreshing the page.
The form is located inside a secondary page, that is called into the main page div ( similar to using a master page and the content placeholder ).
I have been trying several methods but I always reach the same problem. Whenever I try to submit the form, the response is the secondary page with the form, and I can't place the awnser inside the content div of the mainpage like intended.
Any tips on how to make this work?
Main Page
<div id="content"> Secondary page content goes in here loaded using AJAX</div>
Secondary Page
<form runat="server" id="formuser">
<asp:TextBox ID="txtusername" runat="server"></asp:TextBox>
<asp:TextBox ID="txtemail" runat="server"></asp:TextBox>
Submit Form
</form>
What I intend to do is Submit the above form, while staying in the Main Page and showing the response in the content div.
I need the form to be runat="server" so I can manipulate the data using the code-behind.
Use some jquery:
$('#SaveFormButton').click(function (e) {
$.ajax({
type: "POST",
url: $('#FormToSubmit').attr("action"),
data: $('#FormToSubmit').serialize(),
success: function (data) {
//Whatever you want to do after the form has posted
},
error: function(data){
alert("Error");
}
});
});
Something like this should do it. This way using e.preventDefault() you can use standard form markup and submit buttons.
http://jsfiddle.net/CcDPx/1/
It seems that the method I was using for the content load was building a xmlHttpRquest and it was conflicting with the response that I got from the jquery.