How can I solve the problem:
I am very new to C/C++ so I do not know what info I have to give in order to describe my problem properly. All that I was doing is trying to incorporate Windows Forms following step by step after the guy here. He got everything working and I do not even though I did exactly the same stuff as he did.
Here is the code with the error:
using namespace System;
using namespace System::Windows::Forms;
[STAThreadAttribute]
void Main(array<String^>^ args) {
Application::EnableVisualStyles();
Application::SetCompatibleTextRenderingDefault(false);
Project1::MyForm form;
Application::Run(%form);
}
You should really save yourself a lot of pain and use C# for your GUI and only use C++/CLI to wrap native unmanaged C++ code within your C# GUI.
Anyway, Project1 is not a namespace so just drop it. Try this:
using namespace System;
using namespace System::Windows::Forms;
[STAThreadAttribute]
void Main(array<String^>^ args) {
Application::EnableVisualStyles();
Application::SetCompatibleTextRenderingDefault(false);
MyForm form;
Application::Run(%form);
}
Use Calculator instead of Project1.
Calculator::MyForm form;
Application::Run(%form)
Related
I'm trying to build a service to export a rdlc Localreport from one of my actions in my webapi. Webapi is built on .net core 3.1
I know that reportviewer is not compatible with .net core, so to try and mitigate that I've got a class library project added to my project based on .net framework 4.7.2. Added the reference to the class library to my .net core webapi, so far so good. I'm able to call methods from my class library, no problem.
Now try adding LocalReport to a class in my class library....
using Microsoft.Reporting.WebForms;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
namespace Reports
{
public class RenderAction
{
public void GetOrderReport()
{
string codeBase = Assembly.GetExecutingAssembly().CodeBase;
UriBuilder uri = new UriBuilder(codeBase);
string path = Uri.UnescapeDataString(uri.Path);
string p = Path.GetDirectoryName(path);
string reportPath = Path.Combine(p, "Reports","Order.rdlc");
if (!File.Exists(reportPath)) { return; }
var report = new LocalReport();
}
}
}
intellisense prompted to install Microsoft.Reporting.Viewer so I did so... When calling my function in runtime, I get the following error when creating the new instance of localreport:
System.MissingMethodException
HResult=0x80131513
Message=Method not found: 'Void System.AppDomainSetup.set_ActivationArguments(System.Runtime.Hosting.ActivationArguments)'.
Source=Microsoft.ReportViewer.Common
StackTrace:
at Microsoft.Reporting.ReportRuntimeSetupHandler.InitAppDomainPool(Evidence sandboxEvidence, PolicyManager policyManager)
at Microsoft.Reporting.LocalService..ctor(ILocalCatalog catalog, Evidence sandboxEvidence, PolicyManager policyManager)
at Microsoft.Reporting.ControlService..ctor(ILocalCatalog catalog)
at Microsoft.Reporting.WebForms.LocalReport..ctor()
at Myproject.Reports.RenderAction.GetOrderReport() in C:\Users\RudiGroenewald\source\repos\Myproject-Api-Common\Myproject_Api_Common\Myproject_Reports\RenderAction.cs:line 24
at Myproject.Api.Common.Controllers.ReportsController.Get() in C:\Users\RudiGroenewald\Source\Repos\Myproject-Api-Common\Myproject_Api_Common\Myproject_Api_Common\Controllers\ReportsController.cs:line 22
at Microsoft.Extensions.Internal.ObjectMethodExecutor.Execute(Object target, Object[] parameters)
at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.SyncObjectResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<<InvokeActionMethodAsync>g__Logged|12_1>d.MoveNext()
It seems like some sort of dll version mismatch or something... a bit stumped really.
Is it just not possible to get this working? My alternative is to have a full .net webapi, just for reportwriting, which I prefer not to do. Any thoughts on what I'm doing wrong?
These lines of code allow to run a C++ Winform application:
#include "MyForm.h"
using namespace System;
using namespace System::Windows::Forms;
[STAThread]
int main(array<String^>^ args)
{
Application::EnableVisualStyles();
Application::SetCompatibleTextRenderingDefault(false);
MyProject::MyForm form;
Application::Run(%form);
}
Could you explain me what is that [STAThread]?
And what about this:
Application::Run(%form);
What does that % symbol mean?
From MSDN
STAThreadAttribute indicates that the COM threading model for the
application is single-threaded apartment. This attribute must be
present on the entry point of any application that uses Windows Forms;
if it is omitted, the Windows components might not work correctly. If
the attribute is not present, the application uses the multithreaded
apartment model, which is not supported for Windows Forms.
It is equivalent of CoInitialize for C++
And % is Tracking Reference.
It is like reference & but in managed code.
I followed this tutorial to combine a few DLL's into my EXE.
http://www.digitallycreated.net/Blog/61/combining-multiple-assemblies-into-a-single-exe-for-a-wpf-application
The way I understand this works is:
- it starts by telling the compiler to embed (as embedded resources) each and every DLL that have their Local Copy set to True.
That part is working fine. It apparently doesn't "add" them as resources to my project (figure 1 in the tutorial kind of says otherwise), but I can tell that the size of my EXE is correct.
FYI, my program uses WPFtoolkit, in my case, that's 2 DLL's:
system.windows.controls.datavisualization.toolkit.dll
WPFToolkit.dll
Then, I set the Build Action of my App.xaml to Page, and made a program.cs file which I added to my project.
this is my project.cs:
using System;
using System.Diagnostics;
using System.Windows;
using System.Windows.Automation;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Markup;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Effects;
using System.Windows.Media.Imaging;
using System.Windows.Media.Media3D;
using System.Windows.Media.TextFormatting;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Shell;
using System.IO;
using System.Reflection;
using System.Globalization;
namespace Swf_perium {
public class Program {
//[System.Diagnostics.DebuggerNonUserCodeAttribute()]
//[System.CodeDom.Compiler.GeneratedCodeAttribute("PresentationBuildTasks", "4.0.0.0")]
[STAThreadAttribute]
public static void Main() {
Swft_perium.App app = new Swf_perium.App();
AppDomain.CurrentDomain.AssemblyResolve += OnResolveAssembly;
app.InitializeComponent();
app.Run();
}
private static Assembly OnResolveAssembly(object sender, ResolveEventArgs args)
{
Assembly executingAssembly = Assembly.GetExecutingAssembly();
AssemblyName assemblyName = new AssemblyName(args.Name);
string path = assemblyName.Name + ".dll";
Console.WriteLine(path);
if (assemblyName.CultureInfo.Equals(CultureInfo.InvariantCulture) == false)
{
path = String.Format(#"{0}\{1}", assemblyName.CultureInfo, path);
}
using (Stream stream = executingAssembly.GetManifestResourceStream(path))
{
if (stream == null)
return null;
byte[] assemblyRawBytes = new byte[stream.Length];
stream.Read(assemblyRawBytes, 0, assemblyRawBytes.Length);
return Assembly.Load(assemblyRawBytes);
}
}
}
}
After I build the project, I run it off VS2013, no problem, since both DLL's have their local copy set to true. If I go in my debug folder, take both DLL's out and run the EXE off windows explorer, then the program instantly crashes because it can find the DLL's.
What this tutorial should allow me to do is being able to run that EXE by itself without the DLL's, so yeah, it doesn't work.
I added a console writeline of the path that are being read by the OnResolveAssembly method of my program.cs. And here's what I get:
4 times the same path:
"Swf_perium.resources.dll"
Obviously, when it gets to the Stream, it's null and the method then returns null.
I am trying to understand where these paths are coming from? I don't understand why 4? And why this path?
Has anyone ever tried this technique? Comments on the blog show pretty good success rate.
Does anyone have an idea?
I made several mistakes to get to this stage, but at this point I don't see what I am doing wrong.
Thanks
Steve
EDIT: following HB's guidance, here's what I did:
I took the MSBuild target "mod" out.
Set both references' copy local to FALSE.
Added both DLL as embedded resources manually. They're both into the "Resources" directory at the root of the project.
I set App.xaml build action back to "ApplicationDefinition".
And I excluded my program.cs out of the project.
and added this code to App.xaml.cs:
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;
using System.Reflection;
namespace Swf_perium
{
/// <summary>
/// Interaction logic for App.xaml
/// </summary>
public partial class App : Application
{
public App()
{
AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve);
}
private static Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
{
var execAssembly = Assembly.GetExecutingAssembly();
string resourceName = execAssembly.FullName.Split(',').First() + ".Resources." + new AssemblyName(args.Name).Name + ".dll";
Console.WriteLine(resourceName);
using (var stream = execAssembly.GetManifestResourceStream(resourceName))
{
byte[] assemblyData = new byte[stream.Length];
stream.Read(assemblyData, 0, assemblyData.Length);
return Assembly.Load(assemblyData);
}
}
}
}
now, the console prints out of the 2 DLL's filename, but not the other.. I am guessing that's why it's still not working..
that's where I'm at.
edit:
The DLL that doesn't show is not called by my code directly. it's a dependence from the first DLL. I took that second DLL out of references and resources.. If I set copy local to true for the first DLL (which my program actually uses), building the project generates both DLL at the root - in this case with both dlls generated the program works, funny thing is if I delete that second DLL, the program still works. So the problem isn't that second DLL but the first one.
the error I have (which I've had all along no matter what technique I use) is that my XAML is calling that namespace and can't find it!
edit:
Ok, well it still doesn't work. I've brought my program.cs back into the solution, set it as the entry point. And added the code suggested by HB into it.
I made sure that the assemblyresolve is done on the first line of the main so that's it's done before any wpf is done. I even added a 5s sleep just to make sure that the dll was loaded before any wpf happens. Still no go.
Either the dependence to the second DLL is what's causing a problem (?) or maybe the way I import the namespace in my XAML is incorrect. Do I need to specify that this namespace is embedded? and where it's located - i.e. its path?.
thanks
Perhaps look at Costura where it will do all the hard work of embedding assemblies for you.
Don't know your project structure but i usually add a directory for the assemblies to the root of the project and then add the dlls to that directory as embedded resource. I also then turn off the local copy of the references to make sure that it works.
Here is the code i use in my App.xaml.cs:
static App()
{
AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve);
}
private static Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
{
var execAssembly = Assembly.GetExecutingAssembly();
string resourceName = execAssembly.FullName.Split(',').First() + ".ReferencedAssemblies." +
new AssemblyName(args.Name).Name + ".dll";
using (var stream = execAssembly.GetManifestResourceStream(resourceName))
{
byte[] assemblyData = new byte[stream.Length];
stream.Read(assemblyData, 0, assemblyData.Length);
return Assembly.Load(assemblyData);
}
}
Simply replace the ".ReferencedAssemblies." string according to the directory you placed the dlls in.
(Using the static constructor of the class makes sure that the event is hooked up before any code that potentially accesses referenced assemblies is executed, in your code i would move the hook to the first line of Main, that may already solve your problem.)
I'm having some problems serializing an anonymous type only on the Silverlight platform. I have code on .net 4.0 and .netcf that works fine.
This line right here
Newtonsoft.Json.JsonConvert.SerializeObject(new { Something = "yup" });
throws an aptly named guy, JsonSerializationException:
Error getting value from 'Something' on '<>f__AnonymousType0`1[System.String]'.
I tried 4.0r1 and 4.0r2 - Am I doing something wrong or am I taking crazy pills?
The problem is that anonymous types are defined as internal classes by the compiler. JSON.NET relies on reflection to work, and in Silverlight reflection across assembly borders work only for public types (when used by partially trusted assemblies such as this one).
I think DataContractJsonSerializer as mentioned in the previous answer is the way to go in this case, since it's part of the framework and should have extra privileges.
Another thing to try is use dictionaries or ExpandoObject's instead of anonymous types, but YMMV.
Answer is simple;) Add [assembly: InternalsVisibleTo("Newtonsoft.Json")] to AssemblyInfo.cs and voila... I have exactly the same problem and this attribute solved my serialization/deserialization problem.
AssemblyInfo.cs
[assembly: InternalsVisibleTo("Newtonsoft.Json")]
Is there a specific reason why you want to use Json.NET? If not, you might want to try the built-in serializer (in the System.Runtime.Serialization namespace). I have to admit, I have never tried it with anonymous types, so I am not sure if this will be useful to you. Anyway, here is the class I use for serialization/deserialization:
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.IO;
using System.Text;
using System.Runtime.Serialization.Json;
namespace GLS.Gui.Helper
{
public static class SerializationHelper
{
public static string SerializeToJsonString(object objectToSerialize)
{
using (MemoryStream ms = new MemoryStream())
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(objectToSerialize.GetType());
serializer.WriteObject(ms, objectToSerialize);
ms.Position = 0;
using (StreamReader reader = new StreamReader(ms))
{
return reader.ReadToEnd();
}
}
}
public static T Deserialize<T>(string jsonString)
{
using (MemoryStream ms = new MemoryStream(Encoding.Unicode.GetBytes(jsonString)))
{
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(T));
return (T)serializer.ReadObject(ms);
}
}
}
}
Maybe have a look at this http://whydoidoit.com/silverlight-serializer/ as I have used this to serialize many objects in Silverlight, although I cant remember if i did anonymous types with it.
To supplement the other answers with another workaround, note that the reflection (and so the serialization of anonymous types) will succeed when running with elevated trust.
How does a Silverlight application ask the browser what domain its being served up from?
UPDATE:
Make sure if your class doesn't already have this using statement add it at the top your class. This will help you on some of the examples you'll see online. It confused me for a bit.
using System.Windows.Browser;
How about HtmlDocument.DocumentUri? That'd get you what you need. Page about browser interop here.
As jcollum says you access the HtmlDocument.DocumentUri property to get lots of information on the host. To answer the question in your comment this is how you do this in Page.xaml.cs:
using System;
using System.Windows.Browser;
using System.Windows.Controls;
namespace SilverlightApplication1
{
public partial class Page : UserControl
{
public Page()
{
InitializeComponent();
string hostName = HtmlPage.Document.DocumentUri.Host;
int port = HtmlPage.Document.DocumentUri.Port;
}
}
}