I have two AJAX UpdatePanels on my ASP.NET 2.0 web form. When I clic the LinkkButton which is on the UpdatePanel1, UpdatePanel1 and UpdatePanel2 are updating. How can I Update only the first UpdatePanel?
Thanks.
Please check the UpdateMode property of your update panel.
The content of an UpdatePanel control is updated in the following circumstances:
If the UpdateMode property is set to Always, the UpdatePanel control's content is updated on every postback that originates from anywhere on the page. This includes asynchronous postbacks from controls that are inside other UpdatePanel controls and postbacks from controls that are not inside UpdatePanel controls.
If the UpdatePanel control is nested inside another UpdatePanel control and the parent update panel is updated.
If the UpdateMode property is set to Conditional, and one of the following conditions occurs:
You call the Update method of the UpdatePanel control explicitly.
The postback is caused by a control that is defined as a trigger by using the Triggers property of the UpdatePanel control. In this scenario, the control explicitly triggers an update of the panel content. The control can be either inside or outside the UpdatePanel control that defines the trigger.
The ChildrenAsTriggers property is set to true and a child control of the UpdatePanel control causes a postback. A child control of a nested UpdatePanel control does not cause an update to the outer UpdatePanel control unless it is explicitly defined as a trigger.
You need to set the UpdatePanels' UpdateModes to Conditional, so that they only respond to events from controls within them.
Related
I am facing a problem that I cannot solve!
I have two DropDownLists inside an UpdatePanel with AutoPostBack=true, UpdateMode="always", ChildrenAsTriggers="true" and EnableViewState="false".
The values shown inside the second DropDownList are dependent of the SelectedValue on the first one.
Whenever the selected value on a DropDownList, the entire page is postback. I want only the postback running inside the updatepanel.
Note: The ScriptManager has EnablePartialRendering="true".
What should I do?
Well you must have wrapped the whole page inside the Update Panel i suppose and also as i suspect UpdateMode="always" is the cukprit. Change that to Conditional. Because the update panel is going to be refreshed only on children triggers and not when anyhting and everything happens on the page.
I have two update panels and in the second update panel i have asp.net button and onclick of the button in codebehind i have disabled it like btnAddSecurity.Enabled = false;
When I disable the button i enable a cancel button before it and on cancel button when i try to enable the btnAddSecurity.Enabled = true it simply doesn't work. Both of my updatepanels updatemode is conditional. what is the problem?
thanks
I am assuming cancel button is in the different updatepanel. Then add follwing line to your button click code..
UpdatePanel1.Update();
For more information refer this..
How UpdatePanel Controls Are Refreshed
If the UpdateMode property is set to Always, the UpdatePanel control’s content is updated on every postback that originates from anywhere on the page. This includes asynchronous postbacks from controls that are inside other UpdatePanel controls, and postbacks from controls that are not inside UpdatePanel controls.
If the UpdateMode property is set to Conditional, the UpdatePanel control’s content is updated when one of the following is true:
• When the postback is caused by a trigger for that UpdatePanel control.
• When you explicitly call the UpdatePanel control's Update method.
• When the UpdatePanel control is nested inside another UpdatePanel control and the parent panel is updated.
I have an ASP.NET webpage with several updatepanels. I have a row of buttons (inside an updatepanel) which are connected to another updatepanel by async triggers.
Further down the page, outside any updatepanels, I have a filefield control with a few validators associated. The filefield works well, but when I call one of the buttons inside the updatepanel mentioned previously, it fires the validators associated with the filefield.
Is this supposed to happen? I thought that the asyncronious triggers only made a partial postback with respect to only the contents inside updatepanels.
Kind regards, Casper
go to each button in the update panel, and change its corresponding property CausesValidation to False
I have an update panel that contains a repeater that calls a user control into each row. When I click a button inside the user control, the page does not refresh at all, only when I reload it completely. How can I make the update panel refresh from user control's button click?
Phairoh is correct that your button needs to successfully cause a PostBack.
There are three things that affect when a UpdatePanel is updated:
The UpdateMode property - This takes two possible values, Always and Conditional.
If it is set to Always then any postback o the page will cause the UpdatePanel to update.
If it is set to Conditional then the UpdatePanel is only updated when the UpdatePanel's Update method is called or when one of the UpdatePanel's triggers does a postback.
The Triggers proroperty - Defines which controls will cause the UpdatePanel to be updated when UpdateMode is set to Conditional.
The ChildrenAsTriggers property - This is a boolean value that determines if child controls of the UpdatePanel are automatically considered triggers without having to be added to the Triggers collection.
Because your button is in a UserControl it won't be easy to add the control to the Triggers collection or to have the button call the Update method on the UpdatePanel that is not inside the UserControl.
Because your UpdatePanel contains the UserControl's your best bet is to enable ChildrenAsTriggers. If this doesn't work try setting the UpdateMode property to Always. If this still doesn't work then Phairoh is probably correct and your Button isn't posting back.
Sometimes solving this problem not really convenient with Triggers. So here is another fancy approach which could be used even from your user controls without any knowledge about Update Panel:
var scriptManager = ScriptManager.GetCurrent(Page);
if (scriptManager != null)
scriptManager.RegisterPostBackControl(SomeControlID);
Are you sure your buttons on your user control are attempting to do a postback? I haven't used update panels in a while (and I'd actually recommend avoiding them) but if I recall correctly they will refresh whenever a postback is done within them. This means that your buttons must be Asp:Buttons (or similar controls that cause postback) and not have some kind of javascript on them that would not allow their action to continue (such as a return false).
I have a ListView inside of an Update Panel and wanted to change the Select Query from the code behind fired by a button click event and then reload the ListView inside of the Update Panel. Does anyone know how to cause the Update Panel to refresh from the code behind?
Just do:
YourUpdatePanelId.Update();
From MSDN:
If the page is enabled for partial-page rendering, when you invoke the Update method, the UpdatePanel control's content is updated in the browser. Call the Update method if you have server code that must execute to determine whether an UpdatePanel control should be updated. If you plan to use the Update method, set the UpdateMode property to Conditional. If you want the decision to update the panel to be determined in server logic, make sure that the ChildrenAsTriggers property is false and that no explicit triggers are defined for the panel.
In a typical page development scenario, if you define triggers or if the ChildrenAsTriggers property is true for the UpdatePanel control, the Update method is automatically called during the page life cycle.
If the ContentTemplate property is not defined for the UpdatePanel control, no updates of the panel will occur.