Web Forms :: Check Is Textbox Value Changed On Postback?
Sep 30, 2010
i have a textbox and a button.when the page loads, the textbox text read "hello"now when a user changes the text and then presses the button which causes a postback, how can i check if the user changed the value of the textbox or not?
I'm not sure whether or not this is the correct forum...I have been asked to develop a webpage with a very simple table. 10 columns, 10 rows. Each cell will have a dropdownlist. Several people will have this page up at any given time and they will all make changes as needed. I am planning on using a SQL Server 2008 database to keep track of the entries.I need the page to verify the data it contains against the data in the database every 5 seconds or so. If they are different, either the page can refresh or (if possible) the dropdownlist can just change to the correct value.
I am using telerik control to implement my project. For the validation i use asp.net validation controls. Now i need to check duplicate name for name field in the database. I have 2 options1. in the save button click event or custom validator2. after enter the name i can display the error.Here in the second option i have doubt. How can i achieve this ? using textchanged? i am using radtextbox. when i try textchanged some issues in validation controls because of ajax.I am using asp.net 3.5 So i got one new validator named Dynamic Validator. What is the purpose of this. i dint got any good articles to study abouyt this? Can i use this validator here. I read the following forum[URL]but not got any example for dynamic validator. I thought to implement the scenario like some registration form (yahoo) did.When username enterd just diaply duplicate
[URL]Initially if I make a selection it will automatically post back and firecboItemsPerPage_SelectedIndexChanged. If I then post back by clicking one of the other buttons on the page, cboItemsPerPage_SelectedIndexChanged will continue to fire, despite the fact that the value has not been changed.I want it to be postback only when selected index is changed, not in every postback
I have a gridview control that extends the default gridview. I have added an attribute called "hiddenSelectedValues" to to the gridview during the "PreRender" event and I have a private variable that points to the value of that attribute.
However, once a postback occurs, the grid looses the updated value of this attribute and I am unable to reference get the updated value on the server side.
On Button click(postback), my dropdownlist of gridview is getting blank, so i m getting error of "Object Reference...." on the line "ddl.selecteditem.value"Also, dropdownlist's selectedindexchanged event is fired on Button Click(Page Postback), which is making the dropdownlist to go blank. AutoPostBack of dropdownlist is set as False,
I've taken over work for the custom forums that a previous developer created at my job, and came across a minor bug. We don't allow animated GIFs as avatars in the forums. However, if someone were to take an animated GIF, rename it to imagename.jpeg, and then upload it, the forums will show the image as being animated.
It's a very odd bug as I didn't even think it played the animation if the extension wasn't .gif.
So my question is: Is there a way to check (in .NET 2.0) if an image is an animated gif, even if the extension isn't?
in my webpage two textboxes and one button is ther in that both textboxes having textchanged events TextBox2_textChanged event will fire k it work am clcking submit button textbox1 event fired i wnt to firing
well what i want to find out is how can i figure out if some change occurd in page when postback , i mean when the first state of the page hahe any changes after postback . I thought maybe somehow to compare viewstaes but i can not find out how can i do that.
I have a textbox which is read only and there is a calender besides the textbox.When the user selects the date in the calender pop up, the text in the textbox is populated but it doesn't trigger the text change event.Can anyone tell me how to trigger an event when the text is changed on the textbox?
I have a bunch of controls in a Content Page ( A registration page, right) to gather information concerning a user. One of controls is for the UserName. I want to check that the UserName is unique so I place code in the TextChanged event of the TextBox control for the UserName. I have abreak point set in the event procedure and it never gets hit! This is my first attempt at using Master/Content pages. I have looked in the MSDN Library for many hours concerning this problem without any success. I need to know how to check whether the UserName is currently in an Access database.
I have done outbound rule for anchor(A) tag. after clicking an anchor tag the page gets redirected to the specified page with rewritten url. but when i change value from dropdown list or click on any button on that page, the page url gets changed to old url(the original url for which we did new url.) so i dont want that url to be changed. how can i do that.
create List of dynamic asp:Label, asp:textbox and asp:button when asp:dropdown selected index changed Dropdown List - ddlLang - English, Italian, French, German
If English is selected from ddlLang Create new asp:Label, asp:textbox and asp:button. If French is selected create another new asp:Label, asp:textbox and asp:button. In the same way so on.... and when button submit clicked get all dynamic text box values and label values to Save to DB.
I'm using asp.net 2005,I have one textbox and datagrid. i want to change the datagrid when i entered some value in textbox.ok.I know textchanged event is best ...but my question is textchanged event fired only when i entered "enterkey or space or tab key"...i want to fire when i enter the value without "enterkey or space or tab key"
I have 2 textboxes and a submit button inside a .net composite server control. I tried to only postback when submit button is clicked. I set autopostback = false for both textboxes. But either one still trigger submit button's onclick event by hitting "Enter" inside textbox. How can I stop postback by enter key?