I have a Silverlight application which uses a web service in order to create XPS documents. The document templates are created as XAML controls in a WCF class library.
public void GenerateXPS()
{
Type typeofControl = Type.GetType(DOCUMENT_GENERATOR_NAMESPACE + "." + ControlTypeName, true);
FrameworkElement control = (FrameworkElement)(Activator.CreateInstance(typeofControl));
control.DataContext = DataContext;
FixedDocument fixedDoc = new FixedDocument();
PageContent pageContent = new PageContent();
FixedPage fixedPage = new FixedPage();
//Create first page of document
fixedPage.Children.Add(control);
((IAddChild)pageContent).AddChild(fixedPage);
fixedDoc.Pages.Add(pageContent);
XpsDocument xpsd = new XpsDocument(OutputFilePath + "\\" + OutputFileName, FileAccess.ReadWrite);
System.Windows.Xps.XpsDocumentWriter xw = XpsDocument.CreateXpsDocumentWriter(xpsd);
xw.Write(fixedDoc);
xpsd.Close();
SaveToDocumentRepository();
}
In order to bind the actual data to my document template I set the DataContext property of the control. The problem is that when I look at my XPS, the images (I bind the Source of my Image controls to a string property that represents the URL of my image) are not displayed as if they were not loaded. How can I solve this problem? Thanks!
The binding infrastructure probably needs a push along because you are operating outside the intended use of WPF.
Try adding the following code after setting the datacontext:
control.DataContext = DataContext;
// we need to give the binding infrastructure a push as we
// are operating outside of the intended use of WPF
var dispatcher = Dispatcher.CurrentDispatcher;
dispatcher.Invoke(
DispatcherPriority.SystemIdle,
new DispatcherOperationCallback(delegate { return null; }),
null);
I cover this and other XPS related stuff in this blog post.
Related
I want to open an existing PDF document and add different annotations to it. Namely bookmarks and some text
I am using the Telerik Document Processing Library (dpl) v2019.3.1021.40
I am new to dpl , but I believe the RadFlowDocument is the way to go.
I am having troubles creating the RadFlowDocument
FlowProvider.PdfFormatProvider provider = new FlowProvider.PdfFormatProvider();
using (Stream stream = File.OpenRead(sourceFile))
{
--> RadFlowDocument flowDoc = provider.Import(stream);
}
The line indicated w/ the arrow give the error "Import Not Supported"
There is a telerik blog post here
https://www.telerik.com/forums/radflowdocument-to-pdf-error
It seems relevant, but not 100% sure.
It cautions to be sure the providers are mated correctly, I believe they are in my example....
Again, ultimate goal is to open a PDF and add some stuff to it. I think the RadFlowDocument is the right direction. If there is a better solution, Im happy to hear that too.
I figured it out. The DPL is pretty good, but doc is still growing, hope this helps someone out...
This draws from a myriad of articles, I cant begin to cite them all.
There are 2 notions for working w/ PDFs in the DPL.
FixedDocument takes pages. I think this is meant for sewing docs together.
FlowDocument I believe lays things out like an HTML renderer would.
I am using Fixed, mainly b/c I can get that to work.
using System;
using System.IO;
using System.Windows; //nec for Size struct
using System.Diagnostics; //nec for launching the pdf at the end
using Telerik.Windows.Documents.Fixed.Model;
//if you have fixed and flow provider, you have to specify, so I make a shortcut
using FixedProvider = Telerik.Windows.Documents.Fixed.FormatProviders.Pdf;
using Telerik.Windows.Documents.Fixed.Model.Editing;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace DocAggregator
{
[TestClass]
public class UnitTest2
{
[TestMethod]
public void EditNewFIle_SrcAsFixed_TrgAsFixed()
{
String dt = #"C:\USERS\greg\DESKTOP\DPL\";
String sourceFile = dt + "output.pdf";
//Open the sourceDoc so you can add stuff to it
RadFixedDocument sourceDoc;
//a provider parses the actual file into the model.
FixedProvider.PdfFormatProvider fixedProv = new FixedProvider.PdfFormatProvider();
using (Stream stream = File.OpenRead(sourceFile))
{
//'populate' the doc object from the file
//using the FLOW classes, I get "Import Not Supported".
sourceDoc = fixedProv.Import(stream);
}
int pages = sourceDoc.Pages.Count;
int pageCounter = 1;
int xoffset = 150;
int yoffset = 50;
//editor is the thing that lets you add elements into the source doc
//Like the provider, the Editor needs to match the document class (Fixed or Flow)
RadFixedDocumentEditor editor = new RadFixedDocumentEditor(sourceDoc);
foreach (RadFixedPage page in sourceDoc.Pages)
{
FixedContentEditor pEd = new FixedContentEditor(page);
Size ps = page.Size;
pEd.Position.Translate(ps.Width - xoffset, ps.Height - yoffset);
Block block = new Block();
block.HorizontalAlignment = Telerik.Windows.Documents.Fixed.Model.Editing.Flow.HorizontalAlignment.Center;
block.TextProperties.FontSize = 22;
block.InsertText(string.Format("Page {0} of {1} ", pageCounter, pages));
pEd.DrawBlock(block);
pageCounter++;
}
string exportFileName = "addedPageNums.pdf";
if (File.Exists(exportFileName))
{
File.Delete(exportFileName);
}
File.WriteAllBytes(exportFileName, fixedProv.Export(sourceDoc));
//launch the app
Process.Start(exportFileName);
}
}
}
I need to navigate to a web site that ultimately contains a .pdf file and I want to save that file locally. I am using CEFSharp to do this. The nature of this site is such that once the .pdf appears in the browser, it cannot be accessed again. For this reason, I was wondering if once you have a .pdf displayed in the browser, is there a way to access the source for that file in the cache?
I have tried implementing IDownloadHandler and that works, but you have to click the save button on the embedded .pdf. I am trying to get around that.
OK, here is how I got it to work. There is a function in CEFSharp that allows you to filter an incoming web response. Consequently, this gives you complete access to the incoming stream. My solution is a little on the dirty side and not particularly efficient, but it works for my situation. If anyone sees a better way, I am open for suggestions. There are two things I have to assume in order for my code to work.
GetResourceResponseFilter is called every time a new page is downloaded.
The PDF is that last thing to be downloaded during the navigation process.
Start with the CEF Minimal Example found here : https://github.com/cefsharp/CefSharp.MinimalExample
I used the WinForms version. Implement the IRequestHandler and IResponseFilter in the form definition as follows:
public partial class BrowserForm : Form, IRequestHandler, IResponseFilter
{
public readonly ChromiumWebBrowser browser;
public BrowserForm(string url)
{
InitializeComponent();
browser = new ChromiumWebBrowser(url)
{
Dock = DockStyle.Fill,
};
toolStripContainer.ContentPanel.Controls.Add(browser);
browser.BrowserSettings.FileAccessFromFileUrls = CefState.Enabled;
browser.BrowserSettings.UniversalAccessFromFileUrls = CefState.Enabled;
browser.BrowserSettings.WebSecurity = CefState.Disabled;
browser.BrowserSettings.Javascript = CefState.Enabled;
browser.LoadingStateChanged += OnLoadingStateChanged;
browser.ConsoleMessage += OnBrowserConsoleMessage;
browser.StatusMessage += OnBrowserStatusMessage;
browser.TitleChanged += OnBrowserTitleChanged;
browser.AddressChanged += OnBrowserAddressChanged;
browser.FrameLoadEnd += browser_FrameLoadEnd;
browser.LifeSpanHandler = this;
browser.RequestHandler = this;
The declaration and the last two lines are the most important for this explanation. I implemented the IRequestHandler using the template found here:
https://github.com/cefsharp/CefSharp/blob/master/CefSharp.Example/RequestHandler.cs
I changed everything to what it recommends as default except for GetResourceResponseFilter which I implemented as follows:
IResponseFilter IRequestHandler.GetResourceResponseFilter(IWebBrowser browserControl, IBrowser browser, IFrame frame, IRequest request, IResponse response)
{
if (request.Url.EndsWith(".pdf"))
return this;
return null;
}
I then implemented IResponseFilter as follows:
FilterStatus IResponseFilter.Filter(Stream dataIn, out long dataInRead, Stream dataOut, out long dataOutWritten)
{
BinaryWriter sw;
if (dataIn == null)
{
dataInRead = 0;
dataOutWritten = 0;
return FilterStatus.Done;
}
dataInRead = dataIn.Length;
dataOutWritten = Math.Min(dataInRead, dataOut.Length);
byte[] buffer = new byte[dataOutWritten];
int bytesRead = dataIn.Read(buffer, 0, (int)dataOutWritten);
string s = System.Text.Encoding.UTF8.GetString(buffer);
if (s.StartsWith("%PDF"))
File.Delete(pdfFileName);
sw = new BinaryWriter(File.Open(pdfFileName, FileMode.Append));
sw.Write(buffer);
sw.Close();
dataOut.Write(buffer, 0, bytesRead);
return FilterStatus.Done;
}
bool IResponseFilter.InitFilter()
{
return true;
}
What I found is that the PDF is actually downloaded twice when it is loaded. In any case, there might be header information and what not at the beginning of the page. When I get a stream segment that begins with %PDF, I know it is the beginning of a PDF so I delete the file to discard any previous contents that might be there. Otherwise, I just keep appending each segment to the end of the file. Theoretically, the PDF file will be safe until you navigate to another PDF, but my recommendation is to do something with the file as soon as the page is loaded just to be safe.
I am completely new in Windowsphone7.i have develop sample application in that i want give the option to change the font-color,Size,style(Italic/Bold) as Dynamically(like RadEditor) .please help me how to resolve this option.
If you Develop your Application MVVM style then it is not so hard to do this. You just need a property for every setting you want to set dynamically and then bind to this properties. And you create a Settings View where you can set the properties and if you change them you use INotifyPropertyChanged to broadcast that your properties value changed and so every control which is bound to that property will change and redraw.
GalaSoft MVVM
MVVM Codeplex
Easy MVVM sample Application for Windows Phone 7
The link you found to save an image looks ok, but i did it a bit different, actually from the CameraCaptureTask you already get a WritableBitmap Image and you can save it like this.
To save the Image:
private void SaveToIsolatedStorage(WriteableBitmap image, string fileName)
{
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (myIsolatedStorage.FileExists(fileName))
{
myIsolatedStorage.DeleteFile(fileName);
}
using (var stream = myIsolatedStorage.OpenFile(fileName, FileMode.Create))
{
Extensions.SaveJpeg(image, stream, image.PixelWidth, image.PixelHeight,0, 100);
}
}
}
To read the Image:
private WritableBitmap ReadFromIsolatedStorage(string fileName)
{
WriteableBitmap bitmap = new WriteableBitmap(200,200);
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (store.FileExists(fileName))
{
using (var stream = store.OpenFile(fileName,FileMode.Open))
{
bitmap.SetSource(stream);
}}
}
return bitmap;
}
I hope this will work because i wrote it from scratch. :)
And in your ViewModel you should have a WritableBitmap Property which is bound to your Image Control on your View.
To use a lot of images and work with them you should read a bit more about this, because somehow SL Images use a lot of memory so you will need to address this problem somehow in the future.
I am attempting to create pages in a Sharepoint 2010 pages library via the client object model but I cannot find any examples on how to do it. I have tried two approaches:
The first is to treat the Pages library as a list and try to add a list item.
static void createPage(Web w, ClientContext ctx)
{
List pages = w.Lists.GetByTitle("Pages");
//ListItem page = pages.GetItemById(0);
ListItemCreationInformation lici = new ListItemCreationInformation();
ListItem li = pages.AddItem(lici);
li["Title"] = "hello";
li.Update();
ctx.ExecuteQuery();
}
As expected, this failed with the error message:
To add an item to a document library, use SPFileCollection.Add()
The next approach I tried was to add it as a file. The problem is that the FileCreationInformation object is expecting a byte array and I am not sure what to pass to it.
static void createPage(Web w, ClientContext ctx)
{
List pages = w.Lists.GetByTitle("Pages");
FileCreationInformation file = new FileCreationInformation();
file.Url = "testpage.aspx";
file.Content = new byte[0];
file.Overwrite = true;
ctx.Load(pages.RootFolder.Files.Add(file));
ctx.ExecuteQuery();
}
The piece of code above will add an item in the Pages library but opening the file brings up a blank page which I cannot edit. From reading various topics, I suspect that it may only be possible to add pages via server side code. Any thoughts?
Thanks
The problem is that the
FileCreationInformation object is
expecting a byte array and I am not
sure what to pass to it.
You could you whatever method you want to get the page contents into a string (read it from a file, create it using a StringBuilder, etc) and then convert the string to a byte array using
System.Text.Encoding.ASCII.GetBytes()
First of all, Publishing API is not supported via Client Side Object Model (CSOM) in SharePoint 2010. But you could consider the following approach that demonstrates how to create a publishing page using SharePoint 2010 CSOM.
How to create a publishing page using SharePoint 2010 CSOM
public static void CreatePublishingPage(ClientContext ctx, string listTitle, string pageName, string pageContent)
{
const string publishingPageTemplate = "<%# Page Inherits=\"Microsoft.SharePoint.Publishing.TemplateRedirectionPage,Microsoft.SharePoint.Publishing,Version=14.0.0.0,Culture=neutral,PublicKeyToken=71e9bce111e9429c\" %> <%# Reference VirtualPath=\"~TemplatePageUrl\" %> <%# Reference VirtualPath=\"~masterurl/custom.master\" %>";
var pagesList = ctx.Web.Lists.GetByTitle(listTitle);
var fileInfo = new FileCreationInformation
{
Url = pageName,
Content = Encoding.UTF8.GetBytes(publishingPageTemplate),
Overwrite = true
};
var pageFile = pagesList.RootFolder.Files.Add(fileInfo);
var pageItem = pageFile.ListItemAllFields;
if (!ctx.Site.IsPropertyAvailable("ServerRelativeUrl"))
{
ctx.Load(ctx.Site);
ctx.ExecuteQuery();
}
pageItem["PublishingPageLayout"] = string.Format("{0}_catalogs/masterpage/ArticleLeft.aspx, ArticleLeft",ctx.Site.ServerRelativeUrl);
pageItem["PublishingPageContent"] = pageContent;
pageItem.Update();
ctx.ExecuteQuery();
}
Usage
using (var ctx = new ClientContext(url))
{
ctx.Credentials = new NetworkCredential("username", "password", "domain");
CreatePublishingPage(ctx, "Pages", "Greetings.aspx", "Welcome to SharePoint!");
}
I am trying to retrieve strings from the database and add it as content to the controls on my page before it loads(somewhat like a custom localization). I retrieve my strings from the database uing ria services as follows:
**
Web.DomainService1 context = new Web.DomainService1();
LoadOperation<Web.LocalizationTab>LoadOp=context.Load(context.GetLocalizationTabsQuery(currentCulture, moduleName));
Dictionary<string, string> localizationDictonary = new Dictionary<string, string>();
List<Web.LocalizationTab> localList = new List<Web.LocalizationTab>();
LoadOp.Completed += (s, e) =>
{
localList = LoadOp.Entities.ToList<Web.LocalizationTab>();
//System.Windows.MessageBox.Show(localList.Count.ToString());
foreach (Web.LocalizationTab item in localList)
{
// var control = this.FindName(item.Control_ID.ToString());
if (!localizationDictonary.ContainsKey(item.Control_ID))
{
localizationDictonary.Add(item.Control_ID, item.Control_Text);
}
}
};**
This piece of code is in a separate class called utilities.cs.
now in my Mainpage.xaml.cs i need to get this dictionary with values and then set the controls with the strings from the dictionary.
my problem is that when i do the following in the constructor of Mainpage.xaml.cs:
utilities.getDict(ModuleName);
button1.Content = localizationDictonary["button1"].ToString();
i get an exception as the dictionary doesnt contain values at that point of time.. The load completed event of getting data from the database gets fired only after my constructor is exited. now how do i go about setting my controls automatically in this particular scenario??
Try loading your dictionary in the Silverlight Application class StartUp event. This should ensure that your Dictionary is loaded (and could be placed in the Application Resources for retrieval elsewhere in your application).
You'll need to wait for the GetLocalizationTabsQuery to complete before instantiating your MainPage. In your App.xaml.cs file, you can start the query, add a query completed handler, and only create the MainPage when the query completed handler gets called.