I have a button that looks like this with both OnClick and OnClientClick events
<asp:Button ID="btnExecute" CssClass="btn btn-primary" runat="server" Text="Execute" OnClientClick="setHiddenValues();" OnClick="Execute_Click" />
<script type="text/javascript">
function setHiddenValues() {
//set some values
}
</script>
EDIT: the code behind looks like this.
protected void Execute_Click(object sender, EventArgs e)
{
//execute some code
Response.Redirect("LandingPage");
}
Now when I click on the 'Execute' button, it only seems to go to the javascript and doesn't hit break points in the backend. It just redirects me to an empty page. There are no errors in js console of the browser's dev tools and also no errors being thrown in the backend. Network tab in the dev tools shows a 200 but I know the back end is not hit. What am I doing wrong here?
try:
<asp:Button ID="btnExecute" CssClass="btn btn-primary"
runat="server" Text="Execute"
OnClientClick="setHiddenValues();return true;" OnClick="Execute_Click" />
On client click has to return a value of true, else the Onclick will not trigger.
Try configure this in Page element:
<%#Page AutoEventWireup="true" EnableEventValidation="false" %>
It turns out my issue was much simpler. The 'Debug' option was not selected. The wiring was correct and it was hitting the backend but I was not able to hit the breakpoints in the backend because I was in Release mode.
Related
for one requirements i need to disable button after click and run server side code after disabled for this i have used below code which is called at pageload
btnGREntry.Attributes.Add("onclick", Page.ClientScript.GetPostBackEventReference(btnGREntry, "") +
";this.value='Please wait...';this.disabled = true;");
but it is giving me below error.
An unknown error occurred while processing the request on the server.
The status code returned from the server was: 0
please help me to find out a solution or suggest any other solution to disable button after click
Note: similar things are working in asp.net but i am using in *dotnetnuke version 7.0 *
You can do this in the code-behind.
ASPX
<asp:Button ID="Button1" runat="server" onclick="Button1_Click1" Text="Button" />
Code-behind
protected void Button1_Click1(object sender, EventArgs e)
{
Button a = (Button)sender;
a.Enabled = false;
}
Does the button have to remain disabled continuously or is it to return to enabled after page refresh? In the former case then handle it with both JavaScript and code behind. In the later case handle it with just JavaScript.
<asp:Button ID="Button1" runat="server" onClientClick="DisableButton();" onclick="Button1_Click1" Text="Button" />
JavaScript:
function DisableButton() {
var btn = $("#buttonID").attr("disabled", "disabled");
}
How can I disable or enable button in asp.net? I want to disable button after click to prevent double click. I am trying to disable my Login button after clicking on it.
You have to disable it on client so that user could not click it again.
<asp:button id="btn" runat="server" OnClientClick="this.disabled=true;"......
To disable on server side asp.net code.
btn.Enabled = false;
You can use the client-side onclick event to do that:
yourButton.Attributes.Add("onclick", "this.disabled=true;");
or
You can do this with javascript. in your form tag,
onsubmit="javascript:this.getElementById("submitButton").disabled='true';"
or
In code behind file you can do like this
button1.enabled = false
write a java-script function which checks the user name and password.If they are not blank the disable the button.
But if you disable the button and there is a postback. And after the postback still it will be enable.
So Idea is
Create a java-script function.
validate user-name and password
if they are valid
disable the button (javascript).
Add ClientIdMode="Static" to your <asp:button> to prevent .NET from mangling the name.
--edit
<asp:button id="btn" runat="server" ClientIdMode="Static" OnClientClick="return btn_disable" ...
Your java-script code
function btn_disable
{
//check for user name and password
// if filled
document.getElementById("btn").disabled=true;
}
Front-end only:
<button id="loginbtnID" onclick="DisableBtn()">Log in</button>
<script type="text/javascript">
function DisableBtn() {
document.getElementById("loginbtnID").disabled = true;
}
</script>
Front-end & Code Behind:
(this reloads the whole page though.. check this to prevent reloading)
disablebutton.aspx:
<button id="loginbtnID" runat="server" onclick="DisableBtn()" OnClick="codeBehindFunction">Log in</button>
disablebutton.aspx.cs:
protected void codeBehindFunction(object sender, EventArgs e)
{
loginbtnID.Disabled = false;
}
I have a button like
<asp:Button ID="Button1" runat="server" Text="Submit" onclick="RedirectToLocker"
OnClientClick="return false;" UseSubmitBehavior="false" />
and a method in the codebehind like
public void RedirectToLocker(object sender, EventArgs e)
{
Response.Redirect(ConfigurationManager.AppSettings["LockerLoginURL"]);
}
But when I click the button it doesn't hit the code in the method. If I remove OnClientClick = "return false;" then the button submits the form and goes to the wrong page. What am I doing wrong?
EDIT: I am using the OnClientClick="return false;" code because without it the button for some reason acts as a submit for the form it is nested in and immediately redirects to the form action url instead of hitting my code.
When a clientside event handler returns false, the postback is omitted.
OnClientClick="return false;" // <-- no postback
So you either need to remove it or tell us why you actually want to return false from the js-onclick event. If the Response.Redirect goes to the wrong page, you might want to change that.
Edit: So you're redirecting to another page by setting the form's Action to another url. Then you could set the Button's PostBackUrl to the same url as the current page. Then it would hit the codebehind.
You need to remove OnClientClick="return false;" to run the server side method.
If the browser is redirecting to the wrong page, then check your LockerLoginURL application setting value in the web.config. This should match the URL you are being redirected to.
Change this to the correct URL.
Remove the OnClientClick="return false;"
i want to upload an image on my host in my aspx page.but can i do that with ajax?(i mean,no postback done during the upload).
i look at the gmail file uploader,the classic mode used flax(this is bad idea) but i can understand about the modern mode?!!
according to my search in Google it is impossible for security reasons may be occure
some body help me about this issue."upload a file using ajax"
you can do like this.. using ajax .....
STEP 1: first create an upload form in separate page which is like this (myIframe.html)
<form method="POST" target="_self" enctype="multipart/form-data" action="main.aspx">
<input type="file" name="fileUpload" />
<input type="submit" value="UPLOAD" />
</form>
STEP 2: In main page (main.aspx), you have to put an iframe and loaded that page in it. you can also made borders invisible so it did not look like it is an iframe.
<iframe name="iUploadFrame" src="myIframe.html" frameborder="0" onload="iUploadFrameLoad();"></iframe>
Note that this is specifying onload event handler function of javascript. that one will explain it below.
STEP 3: For testing, in main.aspx and in UpdatePanel with a button and label like this:
<asp:UpdatePanel ID="pnlMain" runat="server">
<ContentTemplate>
<asp:Label id="lblMessage" runat="server" />
<asp:Button id="btnUploadComplted" runat="server" style="visibility:hidden;" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnUploadCompleted" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
Note that if you want you can hide the button using CSS style, but not setting visible=”False” attribute. This is because if you want to have the button html in the output document and would want to trigger the ajax callback via that button.
STEP 4: you can define the click event hander of the button in the codebehind like this :
protected void btnUploadCompleted_Click(object s, EventArgs e) {
lblMessage.Text = "UPLOAD PROCESS COMPLETED SUCCESSFULLY";
}
STEP :5 Now, to save file you can do write the code in the code-behind like this:
protected void Page_Load(object s, EventArgs e) {
if ((Request.Files.Count == 1)) {
// process to save file
Response.Write("SUCCESS");
Response.End();
}
}
STEP:6 Now all that we need to do is create javascript function to integrate the process into ajax implementation. The event will trigger when upload process is complete, and it will, in turn, triggers btnUploadCompleted’s click event, which is responsible for making our ajax call.
<script type="text/javascript">
function iUploadFrameLoad() {
if (window.iUploadFrame.document.body.innerHTML == "SUCCESS") {
document.forms[0].elements[btnUploadCompleted].click();
}
}
</script>
I hope it will helps you...
I'm trying to use the ImageButton control for client-side script execution only. I can specify the client-side script to execute using the OnClientClick property, but how do I stop it from trying to post every time the user clicks it? There is no reason to post when this button is clicked. I've set CausesValidation to False, but this doesn't stop it from posting.
I know this problem has already been answered but a simple solution is to return false from the HTML onclick method (i.e. the ASPX OnClientClick method) e.g.
<asp:ImageButton ID="ImageNewLink" runat="server"
ImageUrl="~/images/Link.gif" OnClientClick="DoYourStuff(); return false;" />
Returning false stops the browser from making the request back to the server i.s. stops the .NET postback.
Here's one way you could do it without conflicting with the postback functioning of other controls:
Define your button something like this:
<asp:Button runat="server" Text="Button" UseSubmitBehavior="false" OnClientClick="alert('my client script here');my" />
The "my" ending in the handler for OnClientClick is a way to alias asp.net's __doPostBack client event that forces the postback; we simply override the behavior by doing nothing similar to this script:
<script type="text/javascript">
function my__doPostBack(eventTarget, eventArgument) {
//Just swallow the click without postback of the form
}
</script>
Edit: Yeesh, I feel like I need to take a shower after some of the dirty tricks that I need to pull in order to get asp.net to do what I want.
Another solution would be to define a PostBackUrl that does nothing
<asp:imagebutton runat="server" PostBackUrl="javascript:void(0);" .../>
<image src="..." onclick="DoYourThing();" />
Use a server side Image control
<asp:Image runat="server" .../>
Pretty sure you can add the client onclick event to that.
Solution 1
<asp:ImageButton ID="btn" runat="server" ImageUrl="~/images/yourimage.jpg"
OnClientClick="return false;" />
OR
Solution 2
<asp:ImageButton ID="btn" runat="server" ImageUrl="~/images/yourimage.jpg"
OnClientClick="yourmethod(); return false;" />
In addition (solution 2), your javascript method may be in this form
<script type="text/javascript">
function yourmethod() {
__doPostBack (__EVENTTARGET,__EVENTARGUMENT); //for example __doPostBack ('idValue',3);
}
</script>
in code behind
protected void Page_Load(object sender, System.EventArgs e)
{
if (this.IsPostBack) {
string eventTarget = this.Request("__EVENTTARGET") == null ? string.Empty : this.Request("__EVENTTARGET");
string eventArgument = this.Request("__EVENTARGUMENT") == null ? string.Empty : this.Request("__EVENTARGUMENT");
}
}
This works Great for me:
Use OnClientClick to write your script and PostBackUrl="javascript:void(0);" to avoid postback.
<div class="close_but">
<asp:ImageButton ID="imgbtnEChartZoomClose" runat="server" ImageUrl="images/close.png" OnClientClick="javascript:zoomclosepopup();" PostBackUrl="javascript:void(0);" />
</div>
Use OnClientClick to write your script and PostBackUrl="javascript:void(0);" to avoid postback