I DONT WANNA GET MY PAGE TO BE GET REFRESH OR POSTBACK
So I am trying uploading file in updatepanel but onclicking upload button the validation check shows that there is no file
my html code is
<asp:UpdatePanel ID="UpdatePanel16" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:FileUpload ID="fp_upload" runat="server" />
<asp:Button ID="btn_browse" runat="server" Text="Upload" OnClick="btn_browse_Click" />
</ContentTemplate>
</asp:UpdatePanel>
It seems to be
my .cs code is
protected void btn_browse_Click(object sender, EventArgs e)
{
if (fp_upload.HasFile)
{
Response.Write("contains file");
}
else
{
Response.Write("no file");
}
}
when I used to browse the file and click on upload button every times it goes in else condition. Whats the problem.
ALSO I DONT WANNA GET MY PAGE TO BE GET REFRESH OR POSTBACK
To use a FileUpload control inside an UpdatePanel control, set the postback control that submits the file to be a PostBackTrigger control for the panel.
just add PostBackTrigger after </ContentTemplate> for the FileUploader as below:
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="FileUpload1" />
</Triggers>
</asp:UpdatePanel>
and add the below code in page load :
ScriptManager.GetCurrent(this).RegisterPostBackControl(FileUpload1);
or if you want to make it async, you can use this :
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="btnAsyncUpload" runat="server"
Text="Async_Upload" OnClick = "Async_Upload_File" />
<asp:Button ID="btnUpload" runat="server" Text="Upload"
OnClick = "Upload_File" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID = "btnAsyncUpload"
EventName = "Click" />
<asp:PostBackTrigger ControlID = "btnUpload" />
</Triggers>
</asp:UpdatePanel>
Write trigger will instruct the button that we are using for the upload to perform a full postback
<asp:UpdatePanel ID="UpdatePanel16" runat="server">
<Triggers>
<asp:PostBackTrigger ControlID="btn_browse" />
</Triggers>
<ContentTemplate>
<asp:FileUpload ID="fp_upload" runat="server" />
<asp:Button ID="btn_browse" runat="server" Text="Upload" OnClick="btn_browse_Click" />
</ContentTemplate>
</asp:UpdatePanel>
Related
I have many LinkButton but I want it to have singleOnClick event to all LinkButton since it will do the same thing (and I will just get the value of CommandArgument). My problem is that LinkButton keeps on doing postback which will refresh the page every time I click on a LinkButton.
I tried many solutions such us adding href="#", using OnClientClick="" property on the LinkButton control in asp.net, but what happens is it doesn't trigger the ClickEvent anymore.
Is there other way to achieve this? Or javascript is my only way in solving this problem?
<asp:ScriptManager runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="panelLinkButton" runat="server" UpdateMode="Conditional">
<triggers>
<asp:AsyncPostBackTrigger ControlID="LinkButton6" EventName="Click" />
</triggers>
<contenttemplate>
<asp:LinkButton ID="LinkButton6" runat="server" CssClass="btn btn-info" OnClick="lnkAddToGroup_Click"><i class="fa fa-search"></i></asp:LinkButton>
</contenttemplate>
</asp:UpdatePanel>
Try using an UpdatePanel like:
<asp:UpdatePanel ID="u1" runat="server" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="lnt" EventName="Click" />
</Triggers>
<ContentTemplate>
<asp:LinkButton ID="lnt" runat="server" onclick="LinkTest_Clkk">LinkButton</asp:LinkButton>
</ContentTemplate>
</asp:UpdatePanel>
I am having an update panel which user control in it
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<uc1:SelectionAjax ID="SelectionAjax1" runat="server" />
<ppmp:PinPadModal ID="ppmodal" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
and inside this user control I am calling another two user controls each user control which has its own update panel
// First User Control
<asp:UpdatePanel ID="UpP1" runat="server" ChildrenAsTriggers="true" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnFinalConfirmation" EventName="Click" />
</Triggers>
<ContentTemplate>
<asp:Button ID="btnFinalConfirmation" runat="server" Text="Confirm" OnClick="btnFinalConfirmation_Click1" />
</ContentTemplate>
</asp:UpdatePanel>
//Second User Control
<asp:UpdatePanel ID="UpPanel1" runat="server" ChildrenAsTriggers="true" UpdateMode="Conditional">
<ContentTemplate>
<asp:Button ID="btnConfirmation" runat="server" Text="Confirm" OnClick="btnConfirmation_Click1" />
</ContentTemplate>
</asp:UpdatePanel>
The issue is that button click event is only being fired on the second user control not the first one how should I solve this
Include ScriptManager in your Aspx Page.This ScriptManager control provides support for client-side AJAX features in an AJAX enabled web pages.
<asp:ScriptManager ID="ScriptManager1" runat="server"/>
Has anyone else tried to use checkbox as control to collapse/expand the AJAX CollapsiblePanelExtender?
The panel collapses/expands fine when I am clicking the checkbox. But the checkbox itself won't get checked.
Did that happen to you too?
I know there's a work around this, but I can't rest until I understand why.
Here's the code just in case someone wants to see:
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<div class="standard">
<asp:UpdatePanel ID="UpdatePanelBespokeRates" runat="server">
<ContentTemplate>
<asp:CheckBox ID="checkbespoke" runat="server" AutoPostBack="False" Checked="false" Text="Click and unclick this checkbox" />
</p>
<asp:UpdatePanel ID="UpdatePanelBespoke" runat="server">
<ContentTemplate>
<asp:CollapsiblePanelExtender ID="CollapsibleExtender2" runat="server"
TargetControlID="PnlBespokeRates" CollapseControlID="checkbespoke"
CollapsedSize="1" ExpandControlID="checkbespoke" SuppressPostBack="True"
Enabled="True" Collapsed="True"></asp:CollapsiblePanelExtender>
<asp:Panel ID="PnlBespokeRates" runat="server" Visible="True" Height="300px" Width="200px" BackColor="White">
<p>Another Hello World text</p>
</asp:Panel>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="checkbespoke" EventName="CheckedChanged" />
</Triggers>
</asp:UpdatePanel>
</ContentTemplate>
</asp:UpdatePanel>
<p>
</div>
in the Code behind it is:
protected void Page_Load(object sender, EventArgs e)
{
CollapsibleExtender2.ClientState = "true";
CollapsibleExtender2.Collapsed = true;
}
Try removing Checked="false" from the asp:CheckBox declaration. I suspect that the postback trigger may be reloading the checkbox and re-initialising it.
What worked was:
SuppressPostback="false" in the CollapsiblePanelExtender attribute
and
Autopostback="true" in the checkbox control
remove all manual C#
And then voila.
I have two asp.net updatepanels on my page. One of them has a checkbox and other one has some labels. I want to update the contents of second updatepanel when checkbox is checked/unchecked. I am using following code:
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm._doPostBack('UpdatePanel2', '');
but it is doing full page post back.
Please suggest a solution.
You can set checkbox's AutoPostback to True and make it a trigger of the second UpdatePanel:
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="True" />
</ContentTemplate>
</asp:UpdatePanel>
<asp:UpdatePanel ID="UpdatePanel2" runat="server">
<ContentTemplate>
<asp:Label ID="Label2" runat="server" Text="Label"></asp:Label>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="CheckBox1" EventName="CheckedChanged" />
</Triggers>
</asp:UpdatePanel>
And then you can add label changing code in checkbox's "CheckedChanged" event handler, e.g.
protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
Label2.Text = DateAndTime.Now;
}
It seems you are looking for update panel triggers, you don't need to trigger it by javascript...
I have two updatepanel and a progressbar on the page. If I set the AssociatedUpdatePanelID, then progressbar is not working, without setting AssociatedUpdatePanelID progress bar is working but the problem is working for both updatepanel. But I need to work on one updatepanel.
<asp:Button ID="Button1" runat="server" Text="Button1" OnClick="Button1_Click" />
<asp:Button ID="Button2" runat="server" Text="Button2" OnClick="Button2_Click" />
<asp:UpdateProgress runat="server" ID="prg" AssociatedUpdatePanelID="upnl">
<ProgressTemplate>
<img src="Images/progressbar.gif" />
</ProgressTemplate>
</asp:UpdateProgress>
<br />
<asp:UpdatePanel runat="server" ID="upnl" UpdateMode="Conditional">
<ContentTemplate>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button1" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
<asp:UpdatePanel runat="server" ID="upnl1" UpdateMode="Conditional">
<ContentTemplate>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Button2" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
Code Behind - C#
protected void Button1_Click(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(3000);
}
protected void Button2_Click(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(3000);
}
In this video, he also not set AssociatedUpdatePanelID
http://www.asp.net/learn/ajax-videos/video-123.aspx
Excellant Article: Explaining every thing in very simple manner..........
http://www.codedigest.com/Articles/ASPNETAJAX/125_Using_UpdateProgress_Control_Effectively.aspx
By Design External triggers for an UpdatePanel do not fire an associated UpdateProgress, since the implementation of enabling the UpdateProgress control searches the control hierarchy for the calling control; an external trigger will not be present in the control hierarchy.
AssociatedUpdatePanelID property in the UpdateProgress control will not work if the event that triggered the UpdatePanel is also external.