I just recently started to use the UpdatePanel and do not understand if what I get is standard behavior:
With an Update Panel defined like this...
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true"/>
<asp:UpdatePanel runat="server" ID="UpdatePanel_Repeater" UpdateMode="Conditional" ChildrenAsTriggers="false">
<ContentTemplate>
<asp:Repeater ...
</ContentTemplate>
</asp:UpdatePanel>
is it normal that the panel gets updated after a Postback caused by a control (DropDownList - SelectedIndexChanged) that isn't inside any UpdatePanel?
I want this to be updated only if called explicitly by UpdatePanel_Repeater.Update() or on PageLoad
Related
This code is in a user control . and i am providing a sample code structure to get an overview .
<Update Panel UpdateMode= "Conditional">
<panel></panel>
<panel>
<button></button>
</panel>
<updatepanel UpdateMode="Conditional"></updatepanel>
</Updatepanel>
so when i click a button in the second panel , i am supposed to hide that panel and it is happening but simultaneously the other panels are getting refreshed . what could be the possible reason for that ?
Based on the code snippet you may have a couple issues to fix:
Make sure you have a ScriptManager on the page with EnablePartialRendering="true"
Correct your markup by making the <UpdatePanel> elements ASP.NET UpdatePanel controls by prefixing them with "asp:".
Add UpdateMode="Conditional" to both of your UpdatePanel controls
Move the sections you want to update asynchronously into the UpdatePanel controls.
Example
<asp:ScriptManager ID="MyScriptManager" EnablePartialRendering="true" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="MyUpdatePanel" runat="server">
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text="This is a label!"></asp:Label>
<asp:Button ID="Button1" runat="server" Text="Click Me" />
</ContentTemplate>
</asp:UpdatePanel>
The following article is a great resource to learn more about the UpdatePanel with details on it's capabilities.
Understanding Partial Page Updates with ASP.NET AJAX
I am using update panel and update progress control. In update panel I have textbox with TextChange event. This event is automatically called from javascript when user enters 10 digits into textbox. The call is :
__doPostBack("LabelTextBoxCode", "TextChanged");
This is my html code :
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdateProgress runat="server" ID="UpdateProgress1" AssociatedUpdatePanelID="UpdatePanel">
<ProgressTemplate>
...processing
</ProgressTemplate>
</asp:UpdateProgress>
<asp:UpdatePanel ID="UpdatePanel" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:TextBox ID="LabelTextBoxCode" runat="server" OnTextChanged="TextChanged_TextBoxCode">
</asp:TextBox>
...
</ContentTemplate>
</asp:UpdatePanel>
So far what I found is this thread UpdateProgress Not working when called thru javascript but it does not help me (I do not know how to use it right in my case).
When I press any button in update panel, progress bar is showing, problem is just with this manually called __doPostBack from javascript.
How to fix it and make updateProgress works ?
Directly calling __doPostback bypasses all the triggers that set the update panel in action. So to avoid that you can either call the OnBeginRequest handler or you can trigger the same button click instead of calling the __dopostback. To trigger button click you can make use of jquery trigger function. You can get an example here.
Hope this helps.
I implemented an update panel with a treeview control inside. The treeview control will cause a postback via Javascript which leads to the OnNodeChecked being triggered.
I have wrapped this in an UpdatePanel control, but I still get the blinking effect on my page. I also have a scriptManager implemented in the page. Does anyone know what I can do to avoid the flicker?
<asp:UpdatePanel ID="updateTreeViewPanel" runat="server"
ChildrenAsTriggers="true" UpdateMode="Conditional">
<ContentTemplate>
<fieldset>
<asp:TreeView ID="tv_WLG" runat="server"
OnTreeNodeCheckChanged="tv_WLG_TreeNodeCheckChanged"
OnSelectedNodeChanged="tv_WLG_SelectedNodeChanged"
onclick="javascript:postBackByObject(event)"
ShowCheckBoxes="All">
</asp:TreeView>
</fieldset>
</ContentTemplate>
</asp:UpdatePanel>
I would recomend adding a trigger...
<asp:UpdatePanel>
<ContentTemplate>
...your existing code
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="tv_WLG" />
</Triggers>
</asp:UpdatePanel>
The clientside script you're targeting may occur outside the scope of the update panel however. You might try handleing your click event in the codebehind instead.
What you can do is add an onload event to the updatepanel and trigger that using __doPostback() like so. Then whenever the click event fires you can handle it in the onload event of the updatepanel
<asp:UpdatePanel ID="updateTreeViewPanel" runat="server"
ChildrenAsTriggers="true" OnLoad="UpdatePanel_Load" UpdateMode="Conditional">
<ContentTemplate>
<fieldset>
<asp:TreeView ID="tv_WLG" runat="server"
OnTreeNodeCheckChanged="tv_WLG_TreeNodeCheckChanged"
OnSelectedNodeChanged="tv_WLG_SelectedNodeChanged"
onclick="__doPostback('updateTreeViewPanel', '');"
ShowCheckBoxes="All">
</asp:TreeView>
</fieldset>
</ContentTemplate>
</asp:UpdatePanel>
The reason your current method isn't working is because the postback object needs to be an object that is being handled by the update panel. Calling doPostback() with the update panel as the object will trigger the partial postback.
Well, i have this in my master page
<cc1:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server" ScriptMode="Release" />
And this in a usercontrol
<asp:UpdateProgress ID="updateProgress1" runat="server" AssociatedUpdatePanelID="CustomerListUpdatePanel" DisplayAfter="0" DynamicLayout="false">
<ProgressTemplate>
<asp:Literal ID="loadingLiteral" runat="server" Text="<%$resources:Label,Loading %>" />
</ProgressTemplate>
</asp:UpdateProgress>
<asp:UpdatePanel id="CustomerListUpdatePanel" runat="server" ChildrenAsTriggers="false" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="SearchButton" EventName="Click" />
</Triggers>
<ContentTemplate>
<asp:repeater id="CustomerListRepeater" runat="server">
Problem here is that when i press the SearchButton the update panel updates but the UpdateProgress does not show it self, even if it takes a few seconds.. [somewhat solved by Yuriy Rozhovetskiy].
Problem is that the child buttons inside the updatepanel do not cause a total postback, instead they only reload the update panel, so it seems ChildrenAsTriggers="false" does not work or im miss understanding it.
Im using AjaxControlToolkit 4.1.50731.0.
Edit: also the UpdateProgress seems to display it self if a button is pressed inside the update panel...
Associating an UpdateProgress with an UpdatePanel Control:
The AssociatedUpdatePanelID property has the following effect on
UpdateProgress control behavior:
When the AssociatedUpdatePanelID property is not set, the
UpdateProgress control is displayed for the following postbacks:
Postbacks that originate from inside any UpdatePanel control.
Postbacks that originate from controls that are asynchronous
triggers for any UpdatePanel control.
When the AssociatedUpdatePanelID property is set to an UpdatePanel
control ID, the UpdateProgress control is displayed for postbacks
that originate from inside the associated UpdatePanel control.
Not sure about #Problem 1.
Regarding #Problem 2... I think your understanding might not be correct.
http://msdn.microsoft.com/en-us/library/system.web.ui.updatepanel.childrenastriggers.aspx
I have the following simple code:
<asp:UpdatePanel runat="server">
<ContentTemplate>
<asp:LinkButton runat="server" Text="Refresh"></asp:LinkButton>
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="LinkButton1" runat="server" Text="<%# DateTime.Now.ToString() %>"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
And in the master page there is a ToolkitScriptManager. but the update panel does not work never similar to they do not exist.
Note: I use .Net 4.0.
Edit: I removed the ToolKitScriptManager and added ScriptManager and the problem still exists. Seems the Ajax functionality is disabled in my application but I do not know how.
Any help!
can you post Code behind Code? I think you missed the databind method in code behind.
Are you getting any errors?
I knew the problem.
<asp:LinkButton runat="server" Text="Refresh"></asp:LinkButton> must have an ID to do a partial postback to its Update Panel.