Web Forms :: Execute Javascript After Built-in Autopostback Call?
May 28, 2010
I have a DataList that has a column with a checkbox in it. The checkbox has its AutoPostBack property set to true. During the DataList's OnItemDataBound event, I am registering a javascript method to the control:
chk2.Attributes.Add("onclick", "CheckAdvanceChecked(this);"); The purpose of this method is to determine if any of the programmatically checkboxes in the DataList are checked, and if so, disable some of the other controls on the page. My problem is that when the HTML is generated, my 'CheckAdvanceChecked' function is being placed (and executed) prior to the javascript that ASP automatically adds to the checkbox (due to its AutoPostBack property): <input id="checkAdvanceList_ctl01_chk" type="checkbox" name="checkAdvanceList$ctl01$chk" onclick="CheckAdvanceChecked(this);
etTimeout('__doPostBack('checkAdvanceList$ctl01$chk','')', 0)" Value="760" /> I need my CheckAdvanceChecked(this); function to to be place after the 'setTimeout' function that ASP generates automatically so it will execute last. Is this possible?
When I use a compare validator, datatypecheck="String", and try to enter the following code to test, the comparevalidation doesn't catch it in time, and instead the browser pops up with an error saying the text is not allowed.
I am using an asp.net autopostback enabled dropdown list. Here i want to restrict the autopostback property fot the value "Select" in the ddl. I have used javascript for this purpose. but not working.My code look like this.
i have a question about call javascript in codebehind. my page has two parts.one part for enter information about manager and another part for usualuser.each person has mellicode.that it has speicail code.i wrote it with javascript and call it with this code:
[Code]....
when i click in btnpazireshsabt i should check mellicode for manager.i call it :
i am developed a grid view using tmplate fields. i have done addition and deletion of row using java script and ajax(using web method). now i want to impliment the editing of the grid row using javascript without autopost back Here is the template field i am using.....
I have a content page that displays search criteria in a div. I would like to hide the criteria div when results are returned, but keep it visible if no results are found. I have code in the DataBound event for the gridview that displays the number of rows returned from the query which works fine. To show the search criteria, I have a RegisterStartupScript which calls the javascript function to show the div. Even though the RegisterStartupScript code is executed, the javascript never runs (I put an alert in the function that never fired). Is this a lifecycle timing issue? I just don't see how I can register the javascript earlier in the page lifecycle if it is. I would think this is a very common requirement. Sub Master:
I'm running into a weird issue that I can't find an answer for anywhere I've looked (and I've looked a ton).I built a web deployment project with Visual Studio 2008 Team System on my old Win XP machine. This has always worked flawlessly and installed everywhere. I can also copy this MSI to my new Windows 7 Ultimate machine and it again installs just fine.
HOWEVER, when I rebuild that exact same web deployment project on my new Win7 machine, also using VS2008, the MSI will build OK, but when I then run it to install my software I get a dialog box telling me "the installer was interrupted." Interestingly, when I built this MSI in my new environment one additional warning popped up during the build process, which was "Unable to copy the schema file '(null)'"After many searches and reading different web pages, I know this has to do with these two registry keys:
[HKEY_LOCAL_MACHINESOFTWAREMicrosoftVisualStudio9.0DeploymentSchema] "DefaultMSISchemaFile"="c:\Program Files\Microsoft Visual Studio 9.0\Common7\Tools\Deployment\Vspkgs\..\VsdSchema\Schema.msi" "DefaultMSMSchemaFile"="c:\Program Files\Microsoft Visual Studio 9.0\Common7\Tools\Deployment\Vspkgs\..\VsdSchema\Schema.msm"
Yet, everything checks out. All permissions are correctly configured, etc., etc.Then, when I enable the built-in administrator account and log in as that, and then rebuild this same web deployment MSI the "Unable to copy the schema file '(null)'" warning no longer appears. Then when I log back out, log back in as myself and then run this newly built MSI it installs fine, just like the original one that was built on XP.I also tried uninstalling VS2008 and re-installing it as the super user, but that also didn't change anything. And yes, I did also configure devenv.exe to run as administrator.
Has anybody seen this? Or is it a requirement that you can only compile deployment projects as the super user? That cannot be right.I've been thrashing for more than five days and for the life of me cannot figure this out. Of course, I can run as the super user when developing, but I thought the new security model in Win7 was designed exactly so you don't have to.
I've got an odd situation with a text box and an autocomplete setup on my page. I'm using a JQuery based autocomplete on a text box that has AutoPostBack="True". This works perfect if I use the keyboard to select an autocomplete item, which then fires Jquery to fill in the text box, and then when I tab out of the box the AutoPostBack fires. If, however, I click on an autocomplete item, my text box loses focus first and the AutoPostBack fires before the Jquery has a chance to change the text in my text box. Is there a way to delay either the PostBack or the Jquery so that they don't fight each other? I'm thinking it may have to be the PostBack that gets changed, since the JQuery would lose it's state on the PostBack
I only want to execute this JavaScript function runEx() if publicVarFromCodeBehind != "abc".
I am setting the publicVarFromCodeBehind = "abc" in the Page_Load event but anyway the runEx() function is executing. I wonder how this works and how to prevent runEx() from executing though I need to catch the logic from C# and pass on the variable to the JavaScript.
I have created javascript function as mentioned below to hide/show some control. I am calling this script on dropdown on 'onchange' method. In dropdown first item is "-- Select --". I want to execute it on Page Load function, so by default it will be hidden. I tried to call like this on Page load, but it is not working.
Executing Server side code using Javascript. Here is the solution.In the Asp.net forums, I often see the question asked, "Can I call server-side code from the client/JavaScript?" Almost invariably, the responses given are "No, the client cannot access the server," or "You can only use WebMethods or PageMethods." The first response is not entirely correct, and unfortunately, WebMethods and PageMethods are static methods and therefore have no way to directly access the page.This is why I present to you the following "hack". I call it a hack because there really should be some way built into the ASP.NET AJAX Extensions that allow this approach directly. Instead, it relies on using controls in a manner that they aren't necessarily intended in order to obtain the desired result. But this "hack" does have a redeeming quality—it's incredibly easy.The Code:
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default2.aspx.vb" Inherits="Default2" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
I have an ActiveX object which extends some functions. I have a web page that loads the ActiveX object and calls its methods in Javascript. The ActiveX object has two method; the problem is that Javascript can successfully call one of them but fails to call the other; citing Object doesn't support this property or method which is nonsense because I made a VB6.0 application that successfully calls this other method, so the two functions are indeed extended correctly and performing their job. And yes, the Internet Explorer security zones are all set and everything, as I wrote above the javascript code can call one method but refuses to call the other.
I am using a Timer with a 3 minutes interval. I am exeuting the Page_Load event every 3 minutes. I am doing that this way as I have all this code inside an UpdatePanel1 which causes
a partial unnoticed postback to the server. I have a lot of code in the Page_Load event that I haven´t put here.
But what does not work is the code I have in the Page_Load event now.
I am trying to execute the javascript function with this line: body1.Attributes.Add("Onload", "startbk()");
This function should start an imageButton to change image between 2 images. This function do works if I refresh the page so the function itself do works.
But it seems this function does not execute when the Timer executes the Page_Load event, so this is my problem how I can solve this?
I have this method, but the javascript never executes:
Protected Sub Logout(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.LoginCancelEventArgs) FormsAuthentication.SignOut() Session.Clear() Me.Page.ClientScript.RegisterStartupScript(Me.GetType(), "alertScript", "facebook_logout();", True) End Sub
The first time the page renders the script is executed. If I click the button to cause a postback it doesn't execute again. Is there a way to make it execute the scripts again?
Basically i have two asp.net buttons on my asp.net page as follow:
[Code]....
and this is the code behand fo btnSave onclick event:
[Code]....
and this is the code behand of btnPreviwe onclick event:
[Code]....
as you can see, when the btnSave is clicked, it is programmatically clikced the btnPrevew first, and btnPreview registers and fires the required JavaScript. But actually once the btnSave clicked, it does go to the btnPreview_OnClick event, but for some unknow reasons, the javascript in btnPreview_OnClick doesnt work, however, when i just put cstext2.Append("alert('hi')" instead of cstext2.Append("'SaveSignature()'", the javascript does executed, and also if i modifed the asp.net code for btnPreview to this, it works too.
In asp.net page, How can i call the javascript methods for form processing-submitting if the user browser supports javascript and use code behind events if the browser does not support javascript.I have the javascript code to send the form data to an ajax server page using jquery. Don't know how to invoke the needed one based on the browsers javascript availability
