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?
View 2 RepliesI'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.
How do I check if a textbox in a formview has changed when I click "Update" (in Edit mode)? TIA. I use VS2008 and Framework 3.5.
View 2 RepliesI need to databind the gridview inside the Ajax UpdatePanel each time user types letter inside my TextBox control. How to override the TextChange event to force it do postback for me?
<script type="text/javascript">
function ace1_itemSelected(sender, e) {
var hdCustID = $get('<%= hdCustID.ClientID %>');
hdCustID.value = e.get_value();
</script>
[code]...
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
View 7 Replies<asp:DropDownList ID="cboItemsPerPage" runat="server" CssClass="standardComboBox" AutoPostBack="true" EnableViewState="true" OnSelectedIndexChanged="cboItemsPerPage_SelectedIndexChanged">
<asp:ListItem Value="1" Text="1" />
[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.
I have some javascript code that modifies the value of this attribute based on the user checking or unchecking checkboxes in the grid. I have confirmed that the javascript is indeed modifying the value of the "hiddenSelectedValues" attribute by using Firebug to see the change as it happens.
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.
How do I keep the value of an attribute changed by javascript on postback?
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,
View 8 RepliesI'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?
Note: The answer marked as the answer, answers the questions in the Title. However, my underlying problem, using type ahead dropdowns, is solved by moving to IE8.
I have a drop down list that when I CLICK a NEW selection I want to cause a postback ("this.form.submit()") But only if the click on the dropdown list just changed the selection.
Note that OnChange will NOT work because when the selection is changed by the keyboard I would not want to postback because it is a type ahead dropdown list.
I also suppose I could use OnChange and check if the change was caused by the mouse.
Maybe if we can come up with both solutions and i'll see which works better?
EDIT: More information:
AutoPostback = true; will not work. (don't want it to post back when the selection is changed by the keyboard)
onBlur = doPostBack; I tried this, but the result is not optimal. The user has to click off the ddl after making a selection with the mouse.
Another way to state what I want to do, i think, is do a postback when both the OnChange and OnClick events fire at the same time.
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
button click event
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.
View 13 RepliesOn postback, how can I check which control cause postback in Page_Init event.
protected void Page_Init(object sender, EventArgs e)
{
//need to check here which control cause postback?
}
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?
View 9 RepliesI 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.
View 5 RepliesHow to fire check changed event in Data-list control?
View 1 RepliesOn a page load, how do I check to see if data in a table has changed? And if any data has changed, populate Gridview1?
View 2 RepliesI 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.
View 1 Repliescan we check postback is partial postback or whole page postback ?
View 4 RepliesHow to validate ddmmyyyy dateformat in the textbox on the textchanged event with split method in asp.net 2.0 ....
View 1 Repliescreate 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.
In ASP .NET 2.0, I've created a user control which is meant to work as a dropdown or popup by using an <input type="button" id="btnTogglePopup" runat="server" style="display:inline"... /> and <div id="divPopup" runat="server" style="display:none" ... /> the rest of the controls are contained inside this div, and they do mantain their values between posts, etc. This button 'runs at server' but it's not intended to post back or submit.It just toggles the popup (div) visible/hidden using Javascript client code by setting the div's style display property to "none" or "block" The problem I'm having is that when a page containing this control posts back, the state visible/hidden of the div is not maintained. If the user had the popup open, after the postback, it will display closed.I've read a bunch by now about ViewState & ControlState, and have the save and load contol state methods working, but when I step thru them they load old values (setting the popup to hidden all the time),and the popup doesn't work! I've come to think that b/c when the button is clicked,the visible state of the div is changed in client code w/o a postback, maybe I have to maintain this state info in a hidden fiel or something like that?At the same time I don't want to have a hidden field if it's unnecessary,and I may just doing something wrong.
View 2 RepliesI'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"
View 3 RepliesI 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?
View 2 Repliesi have a strange requirement, let us suppose my screen looks something like this
when im changing value in "Value 1", the summary textbox value must be changed to "N/A". check the image below
as you can see from the image, the cursor is still inside the "Value 1" textbox, im still typing the text in "Value 1" textbox, and i want "Summary" textbox text to be changed to "N/A".
if nothing is changed in "Value 1" then i dont want to change the value of "Summary" textbox.
i want the same functionality for "Value 2" textbox