I have a master page on which at the top i show a div using jquery. in that div i have a update panel with a checkbox with autopostback true. basically i want to make a menu to change settings without full page postback.it works perfectly
but i have a certain child page in which i have a gallery which has a update panel inside which is a datalist to be able to change images without postback.
problem is when i click on the master page checkbox the update panels on the child page also get refreshed..why this happens???
also for the master page updatepanel i have update mode to conditional and childeren as triggers to false and i have set an asynchpostback trigger for CheckBox1_CheckChanged event.
so am i doing anything wrong...
<asp:UpdatePanel ID="UpdatePanel1" runat="server" ChildrenAsTriggers="False" UpdateMode="Conditional">
<ContentTemplate>
<table border="0" cellpadding="0" cellspacing="0" style="width: 100%">
<tr>
<td style="padding-right: 2px">
<asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="True" OnCheckedChanged="CheckBox1_CheckedChanged" />
</td>
<td>
notify me of new buzz through email</td>
</tr>
</table>
<asp:HiddenField ID="bmStatus" runat="server" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="CheckBox1" EventName="CheckedChanged" />
</Triggers>
</asp:UpdatePanel>
do i have to set any other settings on the child page update panels...i will post the child page update panel code if asked!!!
Thanks a lot
An UpdatePanel is a full postback no matter what. I recommend removing ChildrenAsTriggers="False" unless you have some other reason for needing it. Below is a link to what this setting does. You may need multiple UpdatePanels to achieve your desired functionality.
http://www.asp.net/ajax/documentation/live/mref/P_System_Web_UI_UpdatePanel_ChildrenAsTriggers.aspx
Related
There is something strange happening here. I currently have a drop down drpIntervention that has autopostback="true" and up until now I was calling server code, to disable/enable controls depending on what the selected value is. I'm not likeing the flickering with postbacks so I'm trying to wrap the code in UpdatePanel with AsyncPostBack Trigger but strange things are happening:
This is what code looks like for this update panl:
<asp:UpdatePanel ID="UpdatePanel5" runat ="server" UpdateMode ="Conditional">
<ContentTemplate >
<tr>
<td colspan="3" class="questionFont">
<table style="width:100%; border-collapse:collapse ">
<tr>
<td>
<b>a. What is the Problem?</b>
</td>
<td >
<asp:DropDownList ID="drpCrisisType" runat="server" autopostback="true" Enabled ="false" OnSelectedIndexChanged="drpCrisisType_SelectedIndexChanged ">
</asp:DropDownList>
<span runat="server" style="font-size:12px; font-family :'Times New Roman';" ID="Span16"><i>(Description)</i></span>
</td>
</tr>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="drpIntervention" EventName="SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>
and this is code for the button that's supposed to trigger the Event, which is outside the updatePanel
<tr>
<td class="questionFont" style="padding-top: 20px">
<b>4. Did you engage in any?</b>
</td>
<td style="padding-top: 20px">
<asp:DropDownList ID="drpIntervention" runat="server" autopostback="true" OnSelectedIndexChanged="drpIntervention_SelectedIndexChanged ">
</asp:DropDownList>
</td>
</tr>
So this is not my entire code, the <tr> belongs to a table, that has many more above it, this update panel and drop down are just a part of it. What's happening is, I load the page in browser and everything looks good, then I select a value in drpIntervention and the content (other dropdowns, and textboxes that have server code for enabling/disabling) that is wrapped in update panel gets moved above other content in the page. Even stranger, is that the content that gets moved works correctly without doing the postback, however the content is also in its original place and it doesn't work there.
I hope I'm making sense, the content in update panel is literally in 2 places on the page as soon as I select a value from drpIntervention. Mind blown!
I believe the issue had to do with where I was putting the asp:update panel. Since I was putting it inside the table, it was somehow was overriding the formatting and bringing the content within the update panel to top of the the table.
What solved the issue is when I created a table for this questions, and wrapped the entire table with the asp:update panel. This resolved the issues
In our application of asp.net with c#, we are using Ajax with update panel control.
In panel, we have put export to excel button inside tab panel.
We have also put triggers after ending of content template. Please find below code for your reference.
<asp:UpdatePanel ID="UpdatePanelPage" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<table id="tblMain" runat="server" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td>
<asp:TabContainer ID="TabContainer1" runat="server" Width="100%">
<asp:TabPanel ID="tabCompanyName" runat="server">
<asp:Button ID="btnStateExportToExcel" runat="server" Text="Export To Excel" CssClass="button" OnClick="btnStateExportToExcel_Click" />
</asp:TabPanel>
</asp:TabContainer>
</td>
</tr>
</table>
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="btnStateExportToExcel" />
</Triggers>
</asp:UpdatePanel>
Now when we run the page following error would be display.
“A control with ID 'btnStateExportToExcel' could not be found for the trigger in UpdatePanel 'UpdatePanelPage'.“
Any idea/suggestion would be highly appreciable.
*As per search results of Google, the button resides in tab panel due to which page was not able to find this control.
Your button are located inside other controls. You should specify namingcontainer hierarchy for update panel trigger. I think this helps you:
<asp:PostBackTrigger ControlID="TabContainer1$tabCompanyName$btnStateExportToExcel" />
Im using an UpdatePanel to refresh a datagrid with some search results but is not working and the whole page goes in postback. i hope somebody can help me, cant get this to work right. . Thanks. Here is my code:
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<tr>
<td align="left" class="pageTitle" valign="top">
<twc:LocalizedLiteral Text="CRMcontxt6" runat="server" />
</td>
</tr>
<tr align="left" style="background-color: #9bbbe3">
<td align="left" colspan="3">
<asp:Label ID="lblSearch" Height="15" runat="server" Font-Bold="true" Font-Size="11"></asp:Label>
<asp:TextBox Width="500px" ID="Search" autoclick="BtnSearch" runat="server" CssClass="boxDesign" />
<asp:LinkButton ID="BtnSearch" runat="server" CssClass="save" />
</td>
</tr>
</table>
<asp:datagrid id="searchresults" runat="server">
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="BtnSearch" />
</Triggers>
</asp:UpdatePanel>
This looks like a familiar .NET Bug. Setting ClientIDMode="AutoID" on the LinkButton should fix it (by the way, you can remove the trigger. It's not needed).
Some solutions:
a. Try Giving UpdateMode = Conditional in the UpdatePanel and try ( when you give triggers
you must define this )
b. Try removing the <table>, and replace it with <div>, sometimes Update Panels are not friendly with the table tag.
c. If above does not work, first try removing the triggers, and the update mode condition and see whether that works. Because if that doesn't work, it means something wrong with the content inside the update panel. You may want to start with some controls to drill down your problem.
d. I see user controls getting called - check if you have update panel inside those user controls placed properly.
Use this in UpdatePanel:
UpdateMode="Conditional" ChildrenAsTriggers="true"
Check that your HTML source does not have 2 or more <form> tags. An asp.net page is supposed to ordinarily have only one <form> tag.
Though this question has been long asked without an answer so far, I faced a similar problem, but discovered the cause of the update panel not working:
When you have a <form> tag in some piece of HTML and then insert that HTML fragment inside the already existing <form> tag of your master page, you get into problems. Each time the child page of the master page is run, and the submit button is clicked, the code the button is supposed to run wont execute. Instead the whole page gets refreshed despite the update panel, and it might also add a query string in the URL of the page.
The nested <form> tag of the master page is at the cause of this. As soon as you remove the extra <form> tag everything should work fine.
Hope this helps someone.
You missed the trigger event. Your trigger should look like this
<Triggers>
<asp:AsyncPostBackTrigger ControlID="BtnSearch" EventName="Click" />
</Triggers>
Don't forget to set the UpdateMode attrivute of the update panel to Conditional
Here is a reference :: Using Triggers in an UpdatePanel in ASP.NET 4.0 C#
Basics:
I have a text box (txtDepositAmount) that people can
enter a deposit amount into and a
drop down (ddlSelectedTerm) that sets the terms.
Through these two values I calculate
the APY (lblCurrentApy).
Rules:
If only one of the values is selected I still want to do an update on the current APY label and clear it.
If either value changes I want to update the current APY and recalculate.
The problem:
As soon as I click away from the textbox and onto the drop down to select my term the drop down flashes and closes because the textbox TextChanged event was just fired.
I have to click on the drop down a second time to be able to select anything!
Do I need to change what event I'm looking at or do I need to move some of the controls outside of the UpdatePanel? Can this only happen if some of the business rules change? Should I just give up and go to javascript?
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<table width="100%">
<tr>
<td align="left" style="width: 10%" class="LineAlign">
</td>
<td align="left" style="width: 40%" class="LineAlign">
<asp:Label ID="lblDollarSymbol" runat="server" Text="$"/>
<asp:TextBox ID="txtDepositAmount" runat="server"
AutoPostBack="true" TabIndex="1" MaxLength="14"
ontextchanged="txtDepositAmount_TextChanged"/>
</td>
<td align="left" style="width: 30%" class="LineAlign">
<asp:DropDownList ID="ddlSelectedTerm" runat="server"
AutoPostBack="true" TabIndex="2"
onselectedindexchanged="ddlSelectedTerm_SelectedIndexChanged">
</asp:DropDownList>
</td>
<td align="center" style="width: 20%">
<asp:Label ID="lblCurrentApy" runat="server"/>
<asp:Label ID="lblPercentSymbol" runat="server" Text="%"/>
</td>
</tr>
</table>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="ddlSelectedTerm" />
<asp:AsyncPostBackTrigger ControlID="txtDepositAmount" />
</Triggers>
</asp:UpdatePanel>
autopostback="true" on your textbox is causing this, since both controls are reloaded after they leave the textbox. I doubt there is a way to avoid this as long as they are in the same UpdatePanel.
Maybe you could set focus to the dropdown list after the textbox-initiated postback, or you could probably make this work by putting the controls in separate UpdatePanels. But really it seems the wrong way to go about it. I would use javascript (and ajax if the logic is complicated) to update the APY. Or just add a "calculate" button...
(Edit)
Here's a slightly ugly hack to avoid ajax, three update panels and still be able to do your logic server side. I do not approve of this method but it is quick and dirty.
Put the Label control that contains the calculation results in an UpdatePanel. The input controls do not need to be in an UpdatePanel.
In the update panel (with the results) have a hidden submit button:
<asp:Button ID="DoCalculate" style="display:none;" UseSubmitBehavior="false"
runat="server" OnClick="Recalculate()" />
This should be the trigger for the UpdatePanel. Then have your two input controls click that button using javascript to cause a partial postback to the "results" panel. Here is the code to add this javascript for the dropdown, for example, in Page_Load:
ddSelectedTerm.Attributes.Add("onSelectedIndexChanged",
"document.getElementByID('" + DoCalculate.ClientID + "').Click()");
Then in put the C# code to do the calculation and update the label in the 2nd update panel in the "Recalculate()" method.
This should work, and give you better layout control and less code flow ugliness then using 3 update panels.
You can just use the Focus() in the server event. For example if you have txtBox1 and txtBox2 and want to have the focus in the box 2 after write something in box 1 and both of them inside an update panel.
Only go to the TextChange event of the box 1 and write txtBox2.Focus() and after the update of the panel the focus will be in the box 2. :)
Hope helps...
I ripped out the UpdatePanel and just did jquery. Screw Microsoft.
I have a user control with linkbuttons (used for paging) and a repeater inside an update panel. The paging works correctly, but is causing a full page postback every time I click through to the next page.
The update panel looks like this:
<asp:UpdatePanel ID="up1" runat="server" UpdateMode="Always">
<ContentTemplate>
<asp:Repeater ID="rptOrganizations" runat="server">
<HeaderTemplate>
<table>
<thead>
<tr>
<th>Organization</th>
<th>State</th>
<th>Accredited Since</th>
</tr>
</thead>
</table>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td>
<asp:Literal ID="ltlInstitution" runat="server" />
</td>
<td>
<asp:Literal ID="ltlState" runat="server" />
</td>
<td>
<asp:Literal ID="ltlAccreditedDate" runat="server" />
</td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
<uc2:RepeaterPaging ID="rpPager" runat="server" PageSize="10" OnNextButtonClickEvent="btnNext_Click" OnPreviousButtonClickEvent="btnPrev_Click" />
</ContentTemplate>
</asp:UpdatePanel>
And the contents of the user control look like this:
<asp:LinkButton ID="btnPrev" runat="server" OnClick="btnPrev_Click">Previous</asp:LinkButton> |
<asp:LinkButton ID="btnNext" runat="server" OnClick="btnNext_Click">Next</asp:LinkButton>
<asp:Literal ID="ltlNumResults" runat="server" /> results returned.
So far, I have tried adding an async postback trigger for the user control, which does cause an async postback but does not update the rest of the text in the update panel. In otherwords, the async postback occurs and the next page shows up, but the original text in the repeater is there as well just below it.
I have also confirmed that I have IDS set on my linkbuttons, since that can trigger a full postback inside an update panel.
I have tried changing the update panel mode (Always, Conditional, ChildrenAsTriggers, etc.).
None of it makes a difference - the only thing that actually causes an async postback is to use the trigger, but then the rest of the content in the update panel is not updated, so I get duplicate content. Any ideas?
Full postback happens if your UpdatePanel cannot render its contents to a <div> (e.g., when it is situated inside of <tr>). So check you html inside of UpdatePanel, you might find the answer there (also, look for some incorrect xhtml, like incorrectly closed elements).
Remove the update mode="Always" Don't put anything over that and it should work.
One more thing are you adding script manager to your page or control not?
Without script manager it will not work.