I have a Silverlight application that has a DataGrid. I need to print the selected items in the DataGrid. However, I do not want to use a WritableBitmap. Is there a way for me to pass just those items to either a WCF Service or a .aspx page and render HTML that will prompt the user to print? If so, how?
Thank you,
If you're using Silverlight 4, you could use the printing API, but I guess you would not ask this question in this case.
In Silverlight 3, I think you have to resort to some kind of hack, where you SL code calls a JavaScript function, giving it the selected data in some format. This function could open a new window where the data is re-displayed in a print-friendly format and then printed.
I mention a new window, because I guess the window hosting the SL content already has some content that is unrelated to the data to print.
Prior to SL4:
Create a WCF service that:
takes in an XML blob
renders it as PDF (one way to do that is to use FO)
stores it in some temp area with unique id
returns the id to the client
Create an .aspx page that:
takes in an id of a PDF file returned by WCF service
streams the generated PDF to the client (with proper Content-Type)
SL client:
invokes WCF service and gets the id of the generated PDF file
constructs the URL of the generated PDF file
uses any of JavaScript tricks to popup that URL in the browser (one way is to have a hidden IFRAME and set its source to the URL)
Related
I have a webbrowser control in my application that is used to display pdf files that have been created in iTextSharp and are stored locally on the hard drive.
I would like to be able to navigate the file (next, previous, first, last, toc) from my application rather than using the inbuilt nav of the reader in the browser.
I have seen that you can navigate to specific pages by using
Browser.Navigate("filename.pdf#page=?);
This works the first time but when trying to navigate to a different page, it makes the browser disappear completely with no errors. However, I can reload the file without problem if I don't have the #page=? suffix on the file url though. Any ideas on this?
Alternatively, is there anyway in iTextSharp of adding something to the file to allow for it to be navigated from an external command?
All the official parameters that can be used to navigate through a PDF using parameters in the query string after the ? character are listed in a document published by Adobe: Parameters for Opening PDF Files
You already mentioned the page parameter. Another option could be using named destinations: nameddest=destination. In this case, you need to add the anchor with name destination to the file using iTextSharp.
Note that not all viewers implement these parameters. Adobe supports them in Adobe Reader and in the Adobe Reader plug-in, but there is no guarantee that they will work in pdf.js (Firefox), Pdfium (Google Chrome),... If your browser disappears when using an open parameter, you may have hit a bug in the browser or the viewer plug-in that causes the browser to crash. iTextSharp nor iText can crash a browser ;-)
There are no other ways you can navigate a PDF from an external application. The only thing you can do, is to add JavaScript to the PDF so that it always opens at the same page. This is done using an open action. I don't think this solves your problem as it would mean that you have to change the PDF file every time you want it to open at a different page.
I'm trying to send a PDF file from a WCF to silverlight client. PDF is generated by DevExpress XtraReports (in method XtraReport CreateReport(string reportTypeName, RootGenericReportParameterContainer reportInformation)).
Acually PDF is saved somewhere on clients computer after choosing save path in file save dialog - DevExpress takes care of everything - but I don't have a clue how to open the PDF in new tab in browser.
And here is another problem. Silverlight 4 has no access to local file system right? So information about local PDF location is useless. Maybe it would be better to save the PDF in WCF and send a link to it to the client - but how?
I would first question why you need to send the file to the Silverlight client. Get rid of that requirement and the solution becomes much simpler. Silverlight can provide a link that opens a new browser tab. That link would be handled by the web domain, processing it as an HttpHandler, generating the PDF file for the browser. Your PDF url doesn't have to reference a physical file, you can still generate it on request, handle querystring values, etc... Lots of different ways to do this.
Seems that the question isn't really about DevExpress or Silverlight - you're just looking to open a [document of some kind] in a new tab. Each browser natively handles things differently, and users can change tab handling to whatever they want. And (as you mentioned) once the user has downloaded the file, you no longer control it.
Your best bet (and the way I do it) is probably to have a link pointing to a handler/file using "target='_blank' " in the anchor tag on the webpage. From the server side, you would want to set the "Content-Disposition" header to "Inline" to indicate to the browser that the document should be displayed in place instead of downloaded ("Attachment").
Any tips/tricks on how to read a file from the local system dynamically in silverlight 4 without having to be out of browser?
Impersonation? Toggling app elevated trust on/off programmatically?
Or is this simply impossible to do without being out of browser?
As it stands I have a Pegasus ImageGear PDF viewer that I feed a "LoadDocument" method a stream of a PDF file.
This of course works fine if the file is an application resource and compiled with the application.
StreamResourceInfo resource = Application.GetResourceStream(new Uri("/TestRIA;component/SampleData/test.pdf", UriKind.Relative));
docViewer.LoadDocument(resource.Stream);
This silverlight application will be hosted through a website deployed on a server. This server has a partition specifically for repositories of files. These files in the "D:" partition are currently accessed by an ASPX web application and displayed in a PDF viewer. We're moving to silverlight, so as the user selects the grid row representation of that file in the repository, I know the "NAME" of the file. The repository's location is a string held in the database configured in another application. I simply concatenate the file name to that repository path and have the filepath.
Again, the 3rd party viewer's "LoadDocument" method has two overloads. One that accepts a stream of the PDF and one that accepts the filename of the PDF.
For example I have a click event that feeds the name of the document, and I already have the root path to concatenate it to:
void testButton_Click(object sender, EventArgs e)
{
string docName = myListBox.SelectedItem.Content.ToString();
docViewer.LoadDocument(repositoryPath + docName);
//OR using stream
Stream s = new FileStream(repositoryPath + docName, FileMode.Open);
docViewer.LoadDocument(s);
}
You cannot programatically interact with an arbitrary file in SL4. Period. There's your section of isolated storage you can read from and write to files, but that isn't what you're looking for. You can read and write files through the file open dialog, but again I think that's not what you want.
The only way out of the Silverlight sandbox is the network. You have to have to talk to a non-sandboxed service to do this. SL has OK support for Web Services, Http, and even sockets. This seems doable for you since you're talking about the file being somewhere on a "server".
I remember reading that this will work without elevated trust only if the code is initiated with a user action such as button click.
http://msdn.microsoft.com/en-us/library/ff382752%28v=vs.95%29.aspx
For security purposes, if a Silverlight application is a sandboxed
application, file and print dialog boxes must be user-initiated. This
means you must show them from a user-initiated action, such as the
click event handler for a button.
As a possible workaround, if your Silverlight app is backed by a service, you could make the reading/writing of the file be handled by the service, assuming it has access to the location(s) and sufficient rights in the destination folder(s).
Create an OpenFileDialog box and you can return stream(s) to the selected file(s).
I am performing a webtest containing 3 pages once of which is a Silverlight page and a Controller page (every page is invoked from controller page and again the control is given back to Controller page).
When the 1st link id clicked it generates one ID that has to be carried forward in every transaction till the completion of the transaction.
The 1st page is a Silverlight page it interacts thorough WCF services to do the transaction.while submitting A request through Silver light the WCF service generates a ID but since the data from the service is returned in XML form, the entire output of the wcfservice if treated as a string data of which is hardcoded which is found at the time of recording.
So, After coming back from the 1st page (silverlight) to the Controller page it is always coming with the same ID which is stored as a string in the service in the recorded test. Since I am not getting the PROPER ID I am not able to move forward to other pages.
Actually, according to me system is not detecting the data returned from a WCF web service as a dynamic one and instead treating it as a hardcoded string.
How to resolve it, please help.
Some errors of Load test are written below:
Extraction Rule Error ExtractValues event 139 No hidden fields were found in the response.
Exception WebTestException 84 There is no context parameter with the name '$HIDDEN1.ConfiguratorTracker$hdnWorkFlowGuid' in the WebTestContext
Make sure you've created an Extraction Rule that is based on the Text Response and not a hidden field. You might want to take a look at a RegEx Extraction Rule.
I want to show the result of a WebClient-Postback in an new Browser-Popup-Window. As the "Navigate" and "Popup" methods of HtmlPage only support Get-requests, I issued an POST-request to an REST-Service via WebClient. But now I want to show the result (e.g. application/ms-excel or application/pdf) in an new Browser-Window.
Therefore, can I open an new BrowserWindow and set its contents as well as some corresponding http-headers with on-board means of Silverlight 4? Or even better, is an easier way to trigger the browser to do the POST-request to the service?
Best Regards
I tried going this route but the WebBrowser control is not opened to the developer. What I did as a temporary workaround was to open my webpage http://www.xyz.com/default.aspx inside the WebControl and let the page drive the rest.
Mike Taulty had an example for somthing like this, how you can use javascript to communicate back to the silverlight app through InvokeScript:
http://mtaulty.com/CommunityServer/blogs/mike_taultys_blog/archive/2009/11/18/silverlight-4-rough-notes-html-hosting-in-the-webbrowser-control.aspx
I hope it helps!