I am developing a site in which youtube video’s will be added to asp.net page using the HTML code given at youtube.com site. When I run the program, in the web page youtube video is displayed. But the strange thing is when I move mouse over the video display area the page postbacks happens. I am able to find this when I run the program in debug mode.
To exactly reproduce the scenario, I am writing the steps which I have done in my project.
1) In visula studio 2010 > Open asp.net web application project (with c# as language)
2) add some page, say cat.aspx
3) in cat.aspx write the code as below
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="lblVideo" runat="server"></asp:Label>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
4) in cat.aspx.cs, in page_load even write the following line
lblVideo.Text = "<iframe width=\"620\" height=\"349\" src=\"http://www.youtube.com/embed/WoTsE7pbuKg\" frameborder=\"0\" allowfullscreen></iframe>";
5)you can replace the above given by youtube.com, but be sure to set "http:" and escape " with \" as how I have done.(to get HTML code for any youtube video, visit www.youtube.com, click on any video or a famous song, below the video a menu "share" will be displayed, click on it, then another option "Embed" will be displayed, click on it, you will be presented with code)
6)Now run your web app project, you can see, youtube video is displayed.
7)Now run with break point set in Page_load event, now move mouse over the video display area, you can see for each time the mouse enters the video display area, a postback happens.
8) I have latest flash installed in firefox and InternetExplorer, this problem happens only in firefox and IE, not in chrome. And this problem happens only when we use Updatepanel. I also found that page does not postback (IsPostBack) is false when every time the control hits the codebehind. It is like page is requested for the first time as how we type the url in the address bar and press enter
I tried using asp:PostBackTrigger and asp:AsyncPostBackTrigger
Both are not giving solution to the problem, because what happens is not postback, it is fresh page request
Many Thanks in advance to anybody who try to help or give solution.
Related
Hi i am using Report service client definition (rdlc) for reporting in my asp.net web application.
I used a reportviwer for displaying report. But while clicking on the print button of report viwer the following error occures
Here is my aspx portion
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<rsweb:ReportViewer ID="ReportViewer1" runat="server" Visible ="false" Width="100%" Height="100%" ShowPrintButton="true">
</rsweb:ReportViewer>
</div>
If anybody knows please help me
The print button of SSRS report viewer is an ActiveX control.
This works only on IE. If you are using any other browser you will not be able to load this control. This ActiveX control is known to cause problems with IE 9 too.
So unless you stuck to a really old environment of IE7,IE8. Don't bother to use the print control that comes with reportviewer.
Provide a button to export the same report as PDF, and let your users print from there.
Where we've seen this problem, it's been because users haven't had permissions to install the ActiveX control into IE.
There's two suggested solutions here, one of which is to deploy the ActiveX control manually onto each machine where it's needed.
This problem is relevent apperantly to IE6 and maybe to newer versions im not sure. when you put a linkbutton inside an updatepanel like so:
<asp:ScriptManager runat="server"></asp:ScriptManager>
<asp:UpdatePanel runat="server">
<ContentTemplate>
<asp:LinkButton runat="server">Test</asp:LinkButton>
</ContentTemplate>
</asp:UpdatePanel>
You run it and then play around with ctrl+mouse wheel and change the size of the site. Then click the linkbutton. It changes the size of the text of the website again to somekind of deffault size... Im wondering if someone knows how to fix this. And what is causing this problem
Edit: the problem was with a few users clicking the link and suddenly all the text on the page became very small and unreadable
You have nothing to fix here, this is a browser behavior.
But if you have a custom behavior that you change the text size, then you need to take care to save the last setting somewhere and then get the last setting and use it.
I have a really specific question for which I don't think I will have an answer but... let's try!
I have an aspx web page that works perfectly with Firefox and Chrome but not on IE9 (don't feed the troll ^^).
My objective is to allow an asynchronous image upload using ASP AjaxControlToolkit (see http://www.asp.net/ajaxlibrary/AjaxControlToolkitSampleSite/asyncfileupload/asyncfileupload.aspx for a demo). When the image asynchronous upload is finished, the UploadedComplete function is called and I put the image in a session variable :
if (fileSizeOk && fileTypeOk)
Session["image"] = this.AsyncFileUploadLogo.FileBytes;
In parallel I have a handler responsible for returning an image from the session variable :
byte[] buffer = (byte[])context.Session["image"];
context.Response.OutputStream.Write(buffer, 0, buffer.Length);
context.Response.OutputStream.Flush();
Then, in my aspx page, I have an asp:Image field in a UpdatePanel that asks to the handler to get the image every five second :
<asp:UpdatePanel ID="UpdatePanelLogo" runat="server">
<ContentTemplate>
<asp:Image ID="ImageFileUploaded" runat="server" ImageUrl="AsyncImageHandler.ashx" />
<asp:Timer ID="TimerFileUploaded" Interval="5000" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
When the user validates the form, I just have to get the variable from the session and I save the image in database with the other values.
Here is my problem: with Firefox and Chrome, the timer provokes the reloading of the image but with IE (even IE9) the image is only displayed after hitting F5. When I put a breakpoint in the handler I can see that it's never called with IE (maybe a caching mechanism?).
Do you have an idea of how to solve this problem?
Thanks for your answers!
Found the solution using a classic Web dirty trick:
this.ImageFileUploaded.ImageUrl = "AsyncImageHandler.ashx?p=" + Environment.TickCount.ToString();
I added that line in the PageLoad(), this last is called on each post back triggered by the timer :)
I have a ASP.net which allows users to select a number of inputs and dropdown lists to filter the report and to download an Excel report after pressing a button on that same form.
The page can be used mulitple times, by changing the inputs and pressing the download
button each time.
The button should be posting back to the hidden IFRAME to a separate webpage, but I am
unable to change the target for the form on the fly as needed.
<form runat="server" method="post">
<asp:Button runat="server" id="DownloadToExcel" TabIndex="-1" Text="Download To Excel" UseSubmitBehavior="False" PostBackUrl="report.aspx" />
</form>
<iframe style="hide" id="output" src=""></iframe>
Additonally, when I download the file when pressing the "DownloadToExcel" button, the file downlodads as expected. However, any additional postbacks including updating the screen are posting back to report.aspx and not filter.aspx.
How do I correct the postback so it only postbacks once to download the file, and then change it back to the original page so the screen can continue to be used to filter and download a second report.
This may also eliminate the need of the IFRAME as well.
I solve the problem my adding PostBackURLs to all the submit buttons directly.
One for the Excel download that goes to report.aspx and the other for the postback on the page for filter.aspx.
It appears that if the postback is changed, in this case to report.aspx, it reuses the pathname for any subsequent postbacks, unless defined explicity, for each time you wish to postback.
I didn't want to have a ton of code on one page, but to keep the code modular and simple. So in my TabContainer I have the following where each tab refers to a web page and my code is inside each web page. My TabContainer itself is inside the default.aspx page.
<asp:TabContainer ID="tabTOL" runat="server" ActiveTabIndex="0" CssClass="tol">
<asp:TabPanel ID="tabHome" runat="server" TabIndex="0" HeaderText="Home">
<ContentTemplate>
<iframe src="Home.aspx"></iframe>
</ContentTemplate>
</asp:TabPanel>
...
Of course, the problem is that I cannot refer to other tabs or the TabContainer/default page from within any tab. I'm trying to update a TextBox on the default.aspx page from a tab, but there is no reference to it.
Should I bite the bullet and have one huge web page with all the html and code behind? There are a dozen tabs in my TabContainer. I would think this would slow down processing as well. Or, is there a cleaner way to do this and still retain the ability to reference controls on the main page or other tabs?
I'm working in VS2008 and .Net 3.5 and AJAX 3.5.
Thanks!!
Larry
I would suggest that you change the structure of Home.Aspx into a Web User Control (*.ascx). The advantage is that you are now running within the context of the parent page. Therefore all it's functionality is within reach. For example, to acces a textbox on the parent page, from the Home.Ascx, you would do this:
((Default)this.Parent).txtMyTextBox.Text = "Hello";