In updatepanel we can use triggers with two methods AsyncPostBackTrigger and PostBackTrigger so I want to know what is different between these two as well how can we decide we need to go for which one.
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What is the different between AsyncPostBackTrigger & PostBackTrigger really?
View 2 RepliesIn my UpdatePanel, the user can page, sort and filter a gridview all using AJAX, then they select a row which causes the post to post back and a textbox to be populated with the rows ID.
Problem is, it seems I can't register both an AsyncPostBackTrigger and a PostBackTrigger to the same control - so how would I accomplish this? Here are my triggers so far:
[code]....
I have an button ("export") to export data from grid to excel.
But it's inside an update panel. So I'm registering postback trigger.
What should I assign to PostBackTrigger.ControlId ???
In documentation I have read:
„Use the PostBackTrigger control to enable controls inside an UpdatePanel to cause a postback instead of performing an asynchronous postback."
I made simple application and I do not see difference between using PostBackTrigger and standard postback.
I have three buttons: two inside update panel and one outside update panel. When I click btnUpdateAsync in event handler I set text property of lblUpdatePanel and lblNoUpdatePanel and only lbl that is inside update panel is chaned if web browswer - so this is ok.
Whant I click btnUpdateInUpdatePanelSync all page is refreshed and both lablels are changed in web browser.
When I click btnUpdateOutsideUpdatePanel I see the same behavior.
If I used button that is not associated with PostBackTrigger I would get the same behavior - so what is the purpose of PostBackTrigger?
This is my app:
[Code]....
protected void Page_Load(object sender, EventArgs e)
{
}
protected void LinkButton1_Click(object sender, EventArgs e)
{
}
protected void btnUpdateAsync_Click(object sender, EventArgs e)
{
lblUpdatePanel.Text = "btnUpdateAsync_Click";
lblNoUpdatePanel.Text = "btnUpdateAsync_Click";
}
protected void btnUpdateInUpdatePanelSync_Click(object sender, EventArgs e)
{
lblUpdatePanel.Text = "btnUpdateInUpdatePanelSync_Click";
lblNoUpdatePanel.Text = "btnUpdateInUpdatePanelSync_Click";
}
protected void btnUpdateOutsideUpdatePanel_Click(object sender, EventArgs e)
{
lblUpdatePanel.Text = "btnUpdateInUpdatePanelSync_Click";
lblNoUpdatePanel.Text = "btnUpdateInUpdatePanelSync_Click";
}
On a page for new users to register, I've placed a asp:wizard control in a updatepanel.Everything is working great, but now I want a new user to upload an image. This however requires a full postback.Is there any way to define the finishbutton of the wizard as a postbacktrigger while the next and previousbuttons remain asynchpostbacktriggers?
View 1 RepliesI have a list of news summary in a repeater control and I want to show the detailed news in a Modal Popup without post back. review the steps I am doing to achive this functionality:
I have list of News Summary on my page in a repeater control, bind with SQL database.
[code]....
my page is using an UpdatePanel to do some ajax function after a button click. So here is what I got.
I have a textbox and a button.. The button clicks and the animation fires... But i dont want that, I want to validate the textbox and if everything is ok then fires Animation. Here is the code. My question is how can I fire this animation after all validations are ok?
[Code]....
I have an ASP.NET Label on my form, which is wrapped in an UpdatePanel. The UpdatePanel has two AsyncPostbackTriggers which reference two DropDownList controls. Based on the combination of selected items in both DropDownLists, I'm updating the Label. I also have a FilteredTextBoxExtender referencing an ASP.NET TextBox that's, by default, only allowing numbers. Now, along with updating the Label based on the combination of selected items from both DropDownLists, I'm also changing the FilteredTextBoxExtender's FilterType to Custom | Numbers and ValidChar to a hyphen, to allow both numbers and a hyphen (for phone numbers). Remember that I have both DropDownLists as AsyncPostbackTriggers for the UpdatePanel. This works perfectly fine doing a regular postback, but if I add those two DropDownLists as AsyncPostbackTriggers, the FilteredTextBoxExtender is not working properly based on the FilterType and ValidChar properties. It only allows just Numbers, which is the default. Is there anyway around this without having to do a regular full postback?
View 3 RepliesI'm dynamically creating image buttons and want their click event to update an image in the update panel where only the panel updates- not the whole page.
I have created the image buttons click event and got it so that it updates the image in the update panel, but I can't seem to create the triggers- I keep getting the error 'Multiple Controls with the same ID' and I can't understand why.
Here's my code:
[Code]....
I am converting an old payment page from classic ASP to ASP.NET. The page includes three radio button options (credit card, purchase order, bill me). The old page uses javascript to enable/disable the appropriate input fields depending on which payment option is selected. For example, if the payment selection is changed from "credit card" to "purchase order", the credit card fields are disabled, and the PO number field is enabled.
I want to mimick this behavior using ASP.NET + server-side AJAX, so I created RadioButtonList for the payment options, and put all the data input controls (credit card number, purchase order number, etc.) within an UpdatePanel. The UpdatePanel has an AsyncPostBackTrigger with ControlID set to the RadioButtonList, and an EventName specified which tries to enable/disable the appropriate input fields depending on which payment option is selected. This doesn't seem to work because changing the radio button selection doesn't seem to fire this trigger.
Is it possble to utilize AsyncPostBackTrigger with a RadioButtonList control? If not can you suggest a way to handle this scenario for dynamically enabling/disabling form inputs?
I want to try and use an updatepanel. So I have surrounded this code with an updatepanel.
Now I need to put "LinkButton57" as AsyncPostBackTrigger. It seems that I cant put that in the HTML code in the Trigger tags as the updatepanel only searches for parenting controls.
This LinkButton57 is located deeper in the control hiearchy as you can see here. So I am trying to put this programatically in the Page_Load event.
Now if I run the below code, I get this exception(Object reference not set to an instance of an object) and wonder if I could be thinking right here and just miss some details perheps? Will be happy for answer.
[Code]....
I have a user control 'UserControl1'.
Which is in update panel of ajax.
Now i want to use trigger in update panel.
Then what should i write in eventname of trigger
<Triggers>
<asp:AsyncPostBackTrigger controlid=" UserControl1 " eventname="????" />
</Triggers>
I have a very simple application that works almost all the time. I am using an UpdatePanel. My script manager is configured to enable partial rendering. My UpdatePanel is configured for conditional update mode. My asynchronous trigger is a timer that runs every 3 seconds. I track unhandled exceptions in the database. I am not getting any unhandled exceptions. Nor am I getting managed exceptions. Now, I had two users side by side running the application today. I had one record in the data queue. The first user did not get updates; her grid did not update. The second user did get updates. The only difference was that the first user was logged in for a long period of time. The second user logged in just before the test. I reviewed the IIS log file and both users were polling the page every 3 seconds for the same data. So why didn't the first user's grid update? The code follows.
<asp:ScriptManager ID="ScriptManager1" runat="server" AsyncPostBackTimeout="30" EnablePartialRendering="true"></asp:ScriptManager>
[Code]....
In my code behind I have the following timer logic. [Code]....
AsyncPostBackTrigger doesn't work on server?
View 4 RepliesI have a TabContainer with a few TabPanels. Inside the first TabPanel there is a GridView that have a LinkButton called "Subject".
Now when this "Subject" is clicked I want to change the TabIndex to another TabPanel so I have created a clickevent for this below.
I want to change TabIndex using an UpdatePanel to not have to do a fullpage postback.
So I need to put the "Subject" in the AsyncPostBackTrigger but it says it cant find the control so I wonder how I would do this for this LinkButton "Subject" ?
[Code]....
I'm using context menu control
[URL]
<asp:UpdatePanel ID="updateVisor" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<cc2:UIControlMenuContextual ID="menuVisor" runat="server" Width="200px" ForeColor="Black"
AutoHide="False" OnItemCommand="menuVisor_ItemCommand">
<cc2:ContextMenuItem CommandName="poner" meta:resourcekey="mc_poner"/>
<cc2:ContextMenuItem CommandName="sacar" meta:resourcekey="mc_sacar"/>
[code]....
have update panel that content check box, textbox, 3 DropDownList with CascadingDropDown extender. When I checked the checked box it should do a AsyncPostBackTrigger and it is working ok but the problem that if I select any thing from DropDownLists then check the box it would clear the DropDownLists after doing AsyncPostBackTrigger for the the check box.
any advice how to separate these controls inside update panel for doing AsyncPostBackTrigger??
i need to add the PostackTrigger for the ContentPage Button Control. The update Panel in Master PAge
The Button Control in Content Page how to add PostBackTrigger for ContentPage Button Control
I know that UpdateProgress doesn't work with PostBackTrigger, but let me explain what i'm trying:
I'm generating a PDF document (Crystal Report) with ExportToHttpResponse that will be downloaded automaticaly by the browser.
So while the document is been generated, i'd like to show the UpdateProgress just while i'm waiting the doc is being generated, doing the UpdateProgress(or some label) to disappear.
What does that means below warning:
Element 'AsyncPostBackTrigger' is not a known element. This can occur if there is a compilation error in the Web site, or the web.config file is missing.
My app is working properly but visual studio showing warning like that.
When I use Ajax I notice thar the event Page_Load is Triggers every time I clicked on a button in UpdatePanel...
So what's the difference between using and Unusing Ajax ?
I am using VS-2005.
In my website I have used the html input control with type=file.
The problem is that when I place this control inside an 'UpdatePanel' the 'PostedFile' property becomes 'Nothing' on postback. So in order to get things working I have removed the 'UpdatePanel' and things are working fine.
However, I am interested to know what kind of workaround is required if I were to use an 'UpdatePanel'? In one of the threads at forums.asp.net I found that we need to set a 'PostBackHandler' for the update panel. I have no idea how to implement this. Does it refer to 'AsyncPostbackTrigger' or 'SyncPostBackTrigger'?
Can someone give an idea how to implement this?
the difference between MVC and AJAX ? What elements should be considered by me when choosing one of them for system development ?
View 3 RepliesI have been using Ajax on my MVC Asp.net applications, and it work very well and reduced the overload on the server, so my question is what are the major differences between Ajax and JQuery ?
Because each time i read about a functionality to implement using Ajax it is mentioned that i can do it using Jquery ? so what are the major areas of differences and what is better to use in Asp.net MVC applications?
