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;"
Related
I try to make postpackurl in code behind so that I can send the code but my issue is when I click the button its keep it in the same page .
my question is how I can make the postbackurl directly go to next page?
Asp.net Button Has property named postbackurl which you can set postbackurl:
<asp:button id="Button2"
text="Post value to another page"
postbackurl="Button.PostBackUrlPage2cs.aspx"
runat="Server">
</asp:button>
Use
response.redirect("frmdefault.aspx")
in your button click code.
In the ASPX file add the below Script:-
<script type="text/javascript">
function SomeMethod() {
window.location.reload("nextpage.aspx");
return false;
}
</script>
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="return SomeMethod();"/>
When the user clicks on the button1 the nextpage.aspx page will be executed and no postback will happen on the current page
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 an imagebutton with an postbackurl and an onclientclick script. When i added the onclientclick code, if my javascript validation passes (aka returns true), the page just seems to perform a postback (the screen just seems to refresh itself), rather than post to the postbackurl. Any ideas why this is happening?
Sample:
<asp:ImageButton ID="imgSendInfo" runat="server" SkinID="SendInfo" PostBackUrl="MyUrlOnAnotherSite" onClientClick="javascript:return onFormSubmit(this.form);return document.MM_returnValue" />
UPDATE:
OK, so I decided to change what JS functions I'm calling now since calling Multiple functions definitely wasn't helping. Here's my updated code. All I'm doing now is validating a single textbox and returning true or false. Even this simple function is causing the postback URL to never get called. Could it have anything to do with the fact that I'm trying to call a function to return a true or false?
My validation function:
function valForm() {
if (document.getElementById('FName').value == '') {
alert('no');
return false;
}
else {
alert('yes');
return true;
}
}
My ImageButton:
<asp:ImageButton ID="imgSendInfo" runat="server" SkinID="SendInfo" PostBackUrl="SetOnCodeBehind" onClientClick="javascript:return valForm();" />
OK figured out a workaround. I REMOVED the return statement from the onclientclick, since the return is what was messing with the postback. I then added requiredfieldvalidators to the page, but Im not displaying any text. This way, 2 sets of validation are occurring (booo), but the first displays my alert messages (this is how the client wants validation performed), and the second prevents the form from posting.
My imagebutton:
<asp:ImageButton ID="imgSendInfo" runat="server" SkinID="SendInfo" PostBackUrl="SetOnCodeBehind" ValidationGroup="enroll" CausesValidation="true" onClientClick="javascript:onFormSubmit(this.form);document.MM_returnValue;" />
My requiredfieldvalidation group:
<asp:RequiredFieldValidator ID="reqVal1" runat="server" ErrorMessage="" ValidationGroup="enroll" ControlToValidate="FName" InitialValue="" />
<asp:RequiredFieldValidator ID="reqVal2" runat="server" ErrorMessage="" ValidationGroup="enroll" ControlToValidate="LName" InitialValue="" />
Did you know that your onClientClick js-function returns twice? return document.MM_returnValue never gets reached.
Is your PostBackUrl's page in your application? You can even validate the previous page on serverside:
If Page.PreviousPage.IsValid Then
' Handle the post back
Else
Response.Write("Invalid")
End If
For further information: MSDN LinkButton.PostBackUrl
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
I have an ASP.NET linkbutton control on my form. I would like to use it for javascript on the client side and prevent it from posting back to the server. (I'd like to use the linkbutton control so I can skin it and disable it in some cases, so a straight up tag is not preferred).
How do I prevent it from posting back to the server?
ASPX code:
<asp:LinkButton ID="someID" runat="server" Text="clicky"></asp:LinkButton>
Code behind:
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
someID.Attributes.Add("onClick", "return false;");
}
}
What renders as HTML is:
<a onclick="return false;" id="someID" href="javascript:__doPostBack('someID','')">clicky</a>
In this case, what happens is the onclick functionality becomes your validator. If it is false, the "href" link is not executed; however, if it is true the href will get executed. This eliminates your post back.
This may sound like an unhelpful answer ... But why are you using a LinkButton for something purely client-side? Use a standard HTML anchor tag and set its onclick action to your Javascript.
If you need the server to generate the text of that link, then use an asp:Label as the content between the anchor's start and end tags.
If you need to dynamically change the script behavior based on server-side code, consider asp:Literal as a technique.
But unless you're doing server-side activity from the Click event of the LinkButton, there just doesn't seem to be much point to using it here.
You can do it too
...LinkButton ID="BtnForgotPassword" runat="server" OnClientClick="ChangeText('1');return false"...
And it stop the link button postback
Just set href="#"
<asp:LinkButton ID="myLink" runat="server" href="#">Click Me</asp:LinkButton>
I think you should investigate using a HyperLink control. It's a server-side control (so you can manipulate visibility and such from code), but it omits a regular ol' anchor tag and doesn't cause a postback.
Just been through this, the correct way to do it is to use:
OnClientClick
return false
as in the following example line of code:
<asp:LinkButton ID="lbtnNext" runat="server" OnClientClick="findAllOccurences(); return false;" />
In C#, you'd do something like this:
MyButton.Attributes.Add("onclick", "put your javascript here including... return false;");
Instead of implement the attribute:
public partial class _Default : System.Web.UI.Page{
protected void Page_Load(object sender, EventArgs e)
{
someID.Attributes.Add("onClick", "return false;");
}}
Use:
OnClientClick="return false;"
inside of asp:LinkButton tag
To avoid refresh of page, if the return false is not working with asp:LinkButton use
href="javascript: void;"
or
href="#"
along with OnClientClick="return false;"
<asp:LinkButton ID="linkPrint" runat="server" CausesValidation="False" href="javascript: void;"
OnClientClick="javascript:self.print();return false;">Print</asp:LinkButton>
Above is code will call the browser print without refresh the page.
call java script function on onclick event.
Have you tried to use the OnClientClick?
var myLinkButton = new LinkButton { Text = "Click Here", OnClientClick = "JavaScript: return false;" };
<asp:LinkButton ID="someID" runat="server" Text="clicky" OnClientClick="JavaScript: return false;"></asp:LinkButton>
Something else you can do, if you want to preserve your scroll position is this:
<asp:LinkButton runat="server" id="someId" href="javascript: void;" Text="Click Me" />
Why not use an empty ajax update panel and wire the linkbutton's click event to it? This way only the update panel will get updated, thus avoiding a postback and allowing you to run your javascript
No one seems to be doing it like this:
createEventLinkButton.Attributes.Add("onClick", " if (this.innerHTML == 'Please Wait') { return false; } else { this.innerHTML='Please Wait'; }");
This seems to be the only way that works.
In the jquery ready function you can do something like below -
var hrefcode = $('a[id*=linkbutton]').attr('href').split(':');
var onclickcode = "javascript: if`(Condition()) {" + hrefcode[1] + ";}";
$('a[id*=linkbutton]').attr('href', onclickcode);
You might also want to have the client-side function return false.
<asp:LinkButton runat="server" id="button" Text="Click Me" OnClick="myfunction();return false;" AutoPostBack="false" />
You might also consider:
<span runat="server" id="clickableSpan" onclick="myfunction();" class="clickable">Click Me</span>
I use the clickable class to set things like pointer, color, etc. so that its appearance is similar to an anchor tag, but I don't have to worry about it getting posted back or having to do the href="javascript:void(0);" trick.
use html link instead of asp link and you can use label in between html link for server side
control