GTK# Webkit System.DllNotFoundException missing file webkitgtk-1.0.so.0
I written the following GTK# application which compiles successfully, code as below:
using System;
using Gtk;
using GtkSharp;
using WebKit;
namespace gtk_test
{
class Hello {
static void Main()
{
Application.Init ();
//MainWindow window = new MainWindow ();
Window window = new Window ("TEST");
window.Fullscreen();
Fixed frmtest=new Fixed();
frmtest.SetSizeRequest(1280,1024);
Label test = new Label();
test.Text = "Hello and Welcome to GTK#";
Button btnclose = new Button();
btnclose.SetSizeRequest(100,50);
btnclose.Clicked += btnclose_clicked;
btnclose.Label = "Exit Program";
btnclose.TooltipText = "close program!";
ScrolledWindow scrollWindow = new ScrolledWindow ();;
scrollWindow.SetSizeRequest(1000,900);
WebView webView = new WebView ();
webView.SetSizeRequest(1200,1000);
webView.Open ("www.bbc.co.uk/sport");
scrollWindow.Add (webView);
frmtest.Put(test,10,50);
frmtest.Put(btnclose,10,75);
frmtest.Put(scrollWindow,10,100);
window.Add(frmtest);
window.Show();
window.ShowAll();
Application.Run ();
}
static void btnclose_clicked (object sender, EventArgs e)
{
Application.Quit();
}
}
}
However it crashes with a System.DllNotFoundException error, stating webkitgtk-1.0.so.0 file is missing.
I've researched on internet looking for solutions but cannot seem to find any. GTksharp and Webkitsharp has been installed. Does it also need webkitgtk?. I am trying this now! I'm really struggling to find out what I have not installed. Note in /usr/lib64 there is a libwebkit-1.0.so.2 file but not a libwebkit-1.0.so.0 file, should that exist?
Thanks for your help,
Andy
I was using an incorrect version of the DLL file. I compiled Webkit# manually and copied across the DLL from sources.
I have also fixed my original installation of webkit-sharp (yum install webkit-sharp*)
I simply changed my config file to (from webkitgtk-1.0.so.0 to webkitgit-1.0.so.2)
<configuration>
<dllmap dll="webkit-1.0" target="webkitgtk-1.0.so.2"/>
</configuration>
This is so it reads the correct library file instead of webkitgtk-1.0.so.0 which does not exist.
Related
I have built new C# class library (user control) using CefSharp (it compiles with no errors) to use it in ms access form but when I try to embed in the form i get the following error:
and did not get error all the times, sometimes works fine, and when I try to embed in excel and I get this error:
I developed this library using:
Visual Studio 2013
Dot Net Framework 4.5.2
CefSharp 53.0.0
and this is the main part of my code:
public void InitBrowser()
{
var settings = new CefSettings();
string assemblyFolder = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
if (!Cef.IsInitialized)
{
settings.BrowserSubprocessPath = Path.Combine(assemblyFolder, "CefSharp.BrowserSubprocess.exe");
if (Cef.Initialize(settings))
{
browser = new ChromiumWebBrowser("url");
}
}
this.Controls.Add(browser);
browser.Dock = DockStyle.Fill;
}
What is the problem in this scenario?
Thanks in advance.
I've got a problem with Xamarin.UITest, specifically screenshot feature. It is not working as expected.
I'm trying to copy "created" screenshot to another directory, but I get the following error:
Message: System.IO.FileNotFoundException : Could not find file
'C:\Program Files (x86)\Microsoft Visual
Studio\2017\Enterprise\Common7\IDE\screenshot-1.png'.
I'm using this piece of code to copy image file:
var screen = app.Screenshot("Welcome screen.");
screen.CopyTo(#"C:\Users\someuser\Desktop\screenshotTest.png");
How to specify first path/location for screenshots, because the original path probably needs admin privileges, that I don't have.
Screenshots saved with App.Screenshot() are located in your test project's directory: MyTestProject"\bin\Debug folder where the first screenshot is named screenshot-1.
Half solution to the problem: I downgraded NUnit from 3.11.0 to 2.7.0, so it works OK.
Use MoveTo() insted of CopyTo().
var screenshot = app.Screenshot($"{DateTime.Now}_{platform}");
screenshot.MoveTo($#"{Destination}\{screenshot.Name}.{screenshot.Extension}");
My screenshots are saving to C:\Users\username\AppData\Local\Temp
Try this code
[TearDown]
public void Teardown()
{
SaveScreenshotIfTestFails();
}
private void SaveScreenshotIfTestFails()
{
if (TestContext.CurrentContext.Result.Outcome.Status == TestStatus.Failed)
{
var testName = TestContext.CurrentContext.Test.Name;
var filename = $"{testName}.png";
var file = app.Screenshot(testName);
var dir = file.DirectoryName;
File.Delete(dir + "\\" + filename);
file.MoveTo($"{testName}.png");
}
}
Screenshots are saved to the Current Directory. Change it via Directory.SetCurrentDirectory.
OLD TITLE: iTextSharp convert HTML to PDF "The document has no pages."
I am using iTextSharp and xmlworker to convert html from a view to PDF in ASP.NET Core 2.1
I tried many code snippets I found online but all generate an exception:
The document has no pages.
Here is my current code:
public static byte[] ToPdf(string html)
{
byte[] output;
using (var document = new Document())
{
using (var workStream = new MemoryStream())
{
PdfWriter writer = PdfWriter.GetInstance(document, workStream);
writer.CloseStream = false;
document.Open();
using (var reader = new StringReader(html))
{
XMLWorkerHelper.GetInstance().ParseXHtml(writer, document, reader);
document.Close();
output = workStream.ToArray();
}
}
}
return output;
}
UPDATE 1
Thanks to #Bruno Lowagie's advice, I upgraded to iText7 and pdfHTML, but I can't find much tutorials about it.
I tried this code:
public static byte[] ToPdf(string html)
{
html = "<html><head><title>Extremely Basic Title</title></head><body>Extremely Basic Content</body></html>";
byte[] output;
using (var workStream = new MemoryStream())
using (var pdfWriter = new PdfWriter(workStream))
{
using (var document = HtmlConverter.ConvertToDocument(html, pdfWriter))
{
//Passes the document to a delegated function to perform some content, margin or page size manipulation
//pdfModifier(document);
}
//Returns the written-to MemoryStream containing the PDF.
return workStream.ToArray();
}
}
but I get
System.NullReferenceException
when I call HtmlConverter.ConvertToDocument(html, pdfWriter)
Am I missing something?
UPDATE 2
I tried to debug using source code.
This is the stack trace
System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=itext.io
StackTrace: at iText.IO.Font.FontCache..cctor() in S:\Progetti\*****\itext7-dotnet-develop\itext\itext.io\itext\io\font\FontCache.cs:line 76
This is the code that generates the exception:
static FontCache()
{
try
{
LoadRegistry();
foreach (String font in registryNames.Get(FONTS_PROP))
{
allCidFonts.Put(font, ReadFontProperties(font));
}
}
catch (Exception) { }
}
registryNames count = 0 and .Get(FONTS_PROP) throws the exception
UPDATE 3
The problem was related to some sort of cache. I can't really understand what, but as you can see in the code the exception was generated when it tried to load fonts from cache.
I realized that, after having tried the same code on a new project where it worked.
So I cleaned the solution, deleted bin, obj, .vs, killed IIS Express, removed and reinstalled all nuget packages then run again, magically it worked.
Then I had to make only one fix to the code:
Instead of HtmlConverter.ConvertToDocument that generates only a 15 bytes document I used HtmlConverter.ConvertToPdf to generate a full PDF.
Here is the complete code:
public static byte[] ToPdf(string html)
{
using (var workStream = new MemoryStream())
{
using (var pdfWriter = new PdfWriter(workStream))
{
HtmlConverter.ConvertToPdf(html, pdfWriter);
return workStream.ToArray();
}
}
}
I had this EXACT same problem, and after digging down all the way to iText7's FontCache object and getting an error when trying to create my OWN FontProgram to use from a raw TTF file (which also failed with the same null reference error), I finally "solved" my problem.
Apparently iText has some internal errors/exceptions that they are just sort of "skipping" and "pushing past", because I realized by accident that I had "Enable Just My Code" in Visual Studios disabled, and so my system was trying to debug iText7's code as well as mine. The moment that I re-enabled it in my Visual Studio settings (Tools > Options > Debugging > General > Enable Just My Code checkbox), the problem magically went away.
So I spent four hours trying to troubleshoot a problem that was in THEIR code, but that they apparently found some way to work around and push through the method anyways even on a null reference failure.
My convert to PDF function is now working just fine.
I was getting this error as well, but noticed it was only on the first attempted load of the SvgConverter. So I added this at the top of my class, and it seems to have fixed hidden the bug.
using iText.Kernel.Pdf;
using iText.IO.Font;
public class PdfBuilder {
static PdfBuilder() {
try {
FontCache.GetRegistryNames();
}
catch(Exception) {
// ignored... this forces the FontCache to initialize
}
}
...
}
I was using itext 7 everything works fine in Console application.
When I use same code in Web/Function App project, I started getting below error.
System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=itext.html2pdf
StackTrace:
at iText.Html2pdf.Attach.Impl.Tags.BrTagWorker..ctor(IElementNode element, ProcessorContext context)
at iText.Html2pdf.Attach.Impl.DefaultTagWorkerMapping.<>c.<.cctor>b__1_10(IElementNode lhs, ProcessorContext rhs)
at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.Visit(INode node)
at iText.Html2pdf.Attach.Impl.DefaultHtmlProcessor.ProcessDocument(INode root, PdfDocument pdfDocument)
at iText.Html2pdf.HtmlConverter.ConvertToPdf(String html, PdfDocument pdfDocument, ConverterProperties converterProperties)
at iTextSample.ConsoleApp.HtmlToPdfBuilder.RenderPdf() in C:\code\iTextSample.ConsoleApp\HtmlToPdfBuilder.cs:line 227
After some investigation found that <br /> tag was a problem. I removed all <br /> tags and it is working fine.
I am trying to write a plugin which parses the source code of any opened (java) file.
All I have found so far is IResourceChangeListener, but what I need is a Listener for some kind of "onRecourceOpenedEvent".
Does something like that exist?
The nearest you can get to this is to use an IPartListener to list to part events:
PlatformUI.getWorkbench().getActiveWorkbenchWindow().getPartService().addPartListener(listener);
In the listener the partOpened tells you about a new part opening:
public void partOpened(IWorkbenchPart part) {
// Is this an editor
if (part instanceof IEditorPart) {
IEditorPart editor = (IEditorPart)part;
// Get file being edited
IFile file = (IFile)editor.getAdapter(IFile.class);
// TODO file is the current file - may be null
}
}
How can I get the list of all DLL dependencies of a given DLL or EXE file?
In other words, I'd like to do the same as the "Dependency walker" tool, but programmatically.
What is the Windows (ideally .NET) API for that?
You can use EnumProcessModules function. Managed API like kaanbardak suggested won't give you a list of native modules.
For example see this page on MSDN
If you need to statically analyze your dll you have to dig into PE format and learn about import tables. See this excellent tutorial for details.
NOTE: Based on the comments from the post below, I suppose this might miss unmanaged dependencies as well because it relies on reflection.
Here is a small c# program written by Jon Skeet from bytes.com on a .NET Dependency Walker
using System;
using System.Reflection;
using System.Collections;
public class DependencyReporter
{
static void Main(string[] args)
{
//change this line if you only need to run the code one:
string dllToCheck = #"";
try
{
if (args.Length == 0)
{
if (!String.IsNullOrEmpty(dllToCheck))
{
args = new string[] { dllToCheck };
}
else
{
Console.WriteLine
("Usage: DependencyReporter <assembly1> [assembly2 ...]");
}
}
Hashtable alreadyLoaded = new Hashtable();
foreach (string name in args)
{
Assembly assm = Assembly.LoadFrom(name);
DumpAssembly(assm, alreadyLoaded, 0);
}
}
catch (Exception e)
{
DumpError(e);
}
Console.WriteLine("\nPress any key to continue...");
Console.ReadKey();
}
static void DumpAssembly(Assembly assm, Hashtable alreadyLoaded, int indent)
{
Console.Write(new String(' ', indent));
AssemblyName fqn = assm.GetName();
if (alreadyLoaded.Contains(fqn.FullName))
{
Console.WriteLine("[{0}:{1}]", fqn.Name, fqn.Version);
return;
}
alreadyLoaded[fqn.FullName] = fqn.FullName;
Console.WriteLine(fqn.Name + ":" + fqn.Version);
foreach (AssemblyName name in assm.GetReferencedAssemblies())
{
try
{
Assembly referenced = Assembly.Load(name);
DumpAssembly(referenced, alreadyLoaded, indent + 2);
}
catch (Exception e)
{
DumpError(e);
}
}
}
static void DumpError(Exception e)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Error: {0}", e.Message);
Console.WriteLine();
Console.ResetColor();
}
}
To get native module dependencies, I believe it should be ok to get it from the PE file's import table, here are 2 links which explain that in-depth:
http://msdn.microsoft.com/en-us/magazine/bb985992.aspx
http://msdn.microsoft.com/en-us/magazine/cc301808.aspx
To get .NET dependencies, we can use .NET's API, like Assembly.Load.
To get a .NET module's all dependencies, How about combine the 2 ways - .NET assemblies are just PE file with meta data.
While this question already has an accepted answer, the documentation referenced in the other answers, where not broken, is old. Rather than reading through all of it only to find it doesn't cover differences between Win32 and x64, or other differences, my approach was this:
C:\UnxUtils\usr\local\wbin>strings.exe E:\the-directory-I-wanted-the-info-from\*.dll > E:\TEMP\dll_strings.txt
This allowed me to use Notepad++ or gvim or whatever to search for dlls that were still depending on MS dlls with 120.dll at the end of the dll name so I could find the ones that needed updating.
This could easily be scripted in your favorite language.
Given that my search for this info was with VS 2015 in mind, and this question was the top result for a Google search, I supply this answer that it may perhaps be of use to someone else who comes along looking for the same thing.
To read the DLL's (modules) loaded by a running exe, use the ToolHelp32 functions
Tool help Documentation on MSDN.
Not sure what it will show for a .Net running exe (I've never tried it). But, it does show the full path from where the DLL's were loaded. Often, this was the information I needed when trying to sort out DLL problems. .Net is supposed to have removed the need to use these functions (look up DLL Hell for more information).
If you don't want to load the assembly in your program, you can use DnSpy (https://www.nuget.org/packages/dnSpyLibs):
var assemblyDef = dnlib.DotNet.AssemblyDef.Load("yourDllName.dll");
var dependencies = assemblyDef.ManifestModule.GetAssemblyRefs();
Notice that you have all the infos you can want in the "ManifestModule" property.