Web Forms :: Validation - AutoPostBack And CausesValidation Interact?
Nov 28, 2010
I have on site three textbox controls, RequiredFieldValidator with each textbox and button (without any code). I have problem, when I set autopostback property of textbox controls to true. Regardless, that EnableClientScript sets to true or false, validation error dissapears - or show only few seconds. Helps only set CausesValidation property of textbox to true. And my question - if autopostback is set to true, should I set causesvalidation to true too to make proper validation process? Why it doesn't work?
I have an issue that I've been fighting with for some time. I have a large web form, with update panels and autopostback controls. When the users click "submit", some custom javascript runs which shows validation summaries and turns the fields with errors red, relatively easy, and it works as expected. The problem is that I have a dropdownlist which should autopostback an update panel. It does this perfectly if the user does not click the submit button, and therefore my custom client script dosesn't execute.However, if a user clicks submit, the custom client script executes (turns fields red and shows validation summaries), and then the dropdownlist does NOT autopostback the first time a user changes it's value. If the user changes the dropdownlist's value a second time, then the autopost back occurs and everything functions as it should. I don't understand why the autopostback is disabled for the first click after the javascript executes. Can someone please help me out? The DropDown List looks like:
I have a required field validator to validate a dropdownlist. this dropdownlist is an autopostback one, and it's causevalidation property is set to be false.the issue is, when I select the default item, the validation message shows, but the still do the postback. And after the postback, the message disappers.here is the snippet of codes:
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 form with a detailsview control and I want to validate if a particular index is selected in a a dropdown.I can set the causesValidation property on the controls in the dropdown control in it's selected index changed event but once it is set, lets say someone selected the wrong index on the DDL and now they want to change it before updating they are stuck in validate Hell. Here is my code from the relevant details rows, the row with the DDL that causes the validation and it's selected index changed event.
I have a button on an ASP.NET page, and that button is (and needs to be) created via Javascript. The problem is, there are some validators on the page, and pressing the button is causing them to fire, and I don't want that to happen in this particular case. I am not sure what CausesValidation=false actually does on the page, but I was hoping to re-create it somehow.
I have been trying to locate the button by using a FindControl() statement in code-behind, but that doesn't seem to be working. If it did, I could just set the CausesValidation there...
I have a large ASP.NET page with many TextBoxes and Validators The problem is that when I click on a button, I want to fire the validation for certain TextBoxes (but not all of them). And when I click on another button, I want to fire all of the validators.
When I Was Trying To causesvalidation=false for my server side validation control like requiredfieldvalidation.i want manually causesvalidation=false using javascript but i m not done.
I'm trying to automate system login by using webbrowser control and do some processing after i have login-ed.
Normally, after login into the web, it will pop up a new windows. But then, i faced a problem,if automate login with WebBrowser control, the pop-ed up new window will ask me to login again. So i have searched for the solution, MSDN suggest to use axWebBrowser and ppdisp in order to keep track of the session.
Now the problem is, i have no idea how to control the axWebBrowser1 to get the HTML ID and set attribute towards the elements in the axWebBrowser page.
I can set value to the element using webBrowser control, as below:
but i cant set it like this with axWebBrowser control... is that anyway that i can use webBrowser control and also maintain the session without using axWebBrowser control?
Here it goes, I've been asked here to create a WebService that will work on .NET framework 1.1 so other project can interact with it to get the job a little .dll(1.1 also) can do.
The main idea behind this is to be able to upgrade the application and the rest of the projects while being able to use this old .dll through the WebService.
Is it possible to comunicate with a WebService that works on the framework 1.1 from an ASP application working on 2.0 or higher.
Actually, what I've tried raise an error like so : The request failed with the state HTTP:401 : Access Denied.
But when I access the webservice(asmx page), it does work, the page shows all the method available. Also the project build perfectly.
So I'm completely new to web development, but I hope to reach a level of knowledge on how to build a Web Server that can interact with my TCP program, like a chatbox basically. How can I achieve this and where should I start learning?
on the basis of above interact with database i also want some animated output to appear such as "smile should increase if student secure above 90 marks"or if not then "smile should decrease" hough i know it all need a huge knowledge of actionscript and asp.net along with c#...
I am using one datalist control for uploading multiple images.I hv used one Asp:FileUplaod Control and one button in one itemtemplate.I am using reqired field validator and regular expression validator for file upload cntrl I am assigning validation group for both of them on ItemDataBound event of my datalist so that each upload cntrl hv same validaton group as required field and regular expression validator.Now what i want to do is - i want to show my error message in validation summary which is right at the top of the page.I want one know how to write javascript that will assign validation group of my control in datalist on which i click ?
I have a C# program used to build and deploy a suite of websites.
I would like to programatically interact with IIS so that it changes where the virtual directory for a test system points to based the result of the build.
I have a regularexpression validator which validates a valid email. I have two buttons on my form. Submit and undo.On undo, we are reverting the page state to defaultsubmit has it validationgroup set while undo doesnot have any validationgroup and CausesValidation="false".Now when i navigate to page and enter invalid emailaddress,i directly click undo. the validator fires and stops my page from posting.however if i press tab and navigate to other control and then click undo,the validator shows error message but posts back and furthur proessing is done
Im using some animationExtenders in my project. The thing is, the objects to be animated are created programmatically, hence i need to also build programmatically the javascript code that will interact with them.
It runs properly but, when i interact with these animated controls and the javascript functions are supposed to get to work, i keep getting the usual run-time error saying that the javascript functions are not defined. But, if i check the final html code generated, i can see how all the controls i built programmatically are there ,as well as the script.
Tried both RegisterStartupScript and RegisterClientScriptBlock, no luck.
I have an ASP .NET 2.0 (4.0 is an option) page that I've embedded the Windows Media Player to using OBJECT tags.
The player is connecting to a Windows Media Services publishing point on the Web server. This is on a 2008 server.
Everything works great, see it here: [URL]
If I understand correctly, the information the player is showing in its status bar comes from the ID3 tags of the current track. Continuing on this line of thought, the ID3 information must be coming to the player from the media server. Correct?
What I want to do is collect and use the information about the track that's current being played. I'd like to be able to create a custom display for the current track information. I'd also like to put a custom value in the track information to look up additional information about the artist/track from a database.
I am an asp.net newbie and encountered problem with postback. I have created a web form and put some web controls and set their AutoPostBack property to True.
Some of the controls are listbox, checkbox. However, the SelectedIndexChanged and OnCheckChanged do not fire automatically when an item is selected from the listbox for example or when the checkbox is checked. I noticed that the commands I put in the SelectedIndexChanged and OnCheckChanged is only fired when a button is clicked.
e.g. The code below that sets the text of a label is being fired only when a button is clicked even if the autopostback property of the listbox is set to TRUE.
