I do not have much experiece of WPF, and I consider it as an easier way to markup/coding UI in .net.
I have install the lastest Rx release, and play it using Console application without any issue, when I used it in a simple WPF application, it seems that 'Observable' is not liked by WPF...
I have added both reference to:
System.CoreEx
System.Reactive
when type in the button click's event handler, the VS intelligent happily pickup the Observable class and its static members, however when compile it, the 'Observable' becomes unknown to the context. Also the intelligence is gone for the class...
If I remove the above two reference, and add them back in again, the intelligence picked it up... when compile, same situation happens again...
I also installed the silverlight version of rx, not still not luck, please advice and help.
private void btnStart_Click(object sender, RoutedEventArgs e)
{
CheckBox[] chbServers = new CheckBox[] { chbMx1, chbMx2, chbMx3, chbMx4 };
ListBox[] lbxFiles = new ListBox[] { listBox1, listBox2, listBox3, listBox4 };
for (int i = 0; i < chbServers.Length; ++i)
{
if (chbServers[i].IsChecked == true)
{
string baseDir = string.Format(#"c:\maildrop\mx{0}", i + 1);
if (Directory.Exists(baseDir))
{
DirectoryInfo di = new DirectoryInfo(baseDir);
FileInfo[] fis = di.GetFiles("*.eml", SearchOption.AllDirectories);
//Observable.GenerateWithTime(
// 0,
// index => index <= fis.Length,
// index => index + 1,
// index => fis[index].Name,
// _ => TimeSpan.FromMilliseconds(300)
// )
// .ObserveOnDispatcher()
// .Subscribe(name =>
// {
// // delete the file
// lbxFiles[i].Items.Remove(name);
// });
}
}
}
}
The commented code is the piece which cause problem...
using System;
using System.Collections.Generic;
using System.Disposables;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Data.SqlClient;
all namespace refereced are as above...
WPF applications use the .NET 4 Client Profile by default, which was not supported by Rx until the latest release. Changing your project settings to use the full .NET 4 framework will allow you to compile.
Related
I have a question about save kinect color video as stream
How to save Kinect's color video as stream to hard by Kinect SDK 2 in WPF???
i read this link: Save Kinect's color camera video stream in to .avi video
For a project, I had to do this. What I've done may not fulfill all your requirements but it may give you an idea. At first I saved every color frame image in local drive with a sequencial naming. Then with ffmpeg I converted those sequential image to video file, in my case it was mp4 video, not avi.
To save color image frame sequentially, you may code like below,
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using Microsoft.Kinect;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
namespace Kinect_Video_Recorder
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
KinectSensor ks;
ColorFrameReader cfr;
byte[] colorData;
ColorImageFormat format;
WriteableBitmap wbmp;
BitmapSource bmpSource;
int imageSerial;
public MainWindow()
{
InitializeComponent();
ks = KinectSensor.GetDefault();
ks.Open();
var fd = ks.ColorFrameSource.CreateFrameDescription(ColorImageFormat.Bgra);
uint frameSize = fd.BytesPerPixel * fd.LengthInPixels;
colorData = new byte[frameSize];
format = ColorImageFormat.Bgra;
imageSerial = 0;
cfr = ks.ColorFrameSource.OpenReader();
cfr.FrameArrived += cfr_FrameArrived;
}
void cfr_FrameArrived(object sender, ColorFrameArrivedEventArgs e)
{
if (e.FrameReference == null) return;
using (ColorFrame cf = e.FrameReference.AcquireFrame())
{
if(cf == null) return;
cf.CopyConvertedFrameDataToArray( colorData, format);
var fd = cf.FrameDescription;
// Creating BitmapSource
var bytesPerPixel = (PixelFormats.Bgr32.BitsPerPixel) / 8;
var stride = bytesPerPixel * cf.FrameDescription.Width;
bmpSource = BitmapSource.Create(fd.Width, fd.Height, 96.0, 96.0, PixelFormats.Bgr32, null, colorData, stride);
// WritableBitmap to show on UI
wbmp = new WriteableBitmap(bmpSource);
kinectImage.Source = wbmp;
// JpegBitmapEncoder to save BitmapSource to file
// imageSerial is the serial of the sequential image
JpegBitmapEncoder encoder = new JpegBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(bmpSource));
using (var fs = new FileStream("./img/" + (imageSerial++) + ".jpeg", FileMode.Create, FileAccess.Write))
{
encoder.Save(fs);
}
}
}
}
}
Above example saves the images in jpeg format. if you need to save it as png format use PngBitmapEncoder.
Now we have saved sequential images in hard drive. To convert these sequential images to video file you can use ffmpeg. You can also use Aforge.net. But I've never used it. In my case I called the ffmpeg.exe process from my C# program like below.
Process.Start("ffmpeg.exe", "-framerate 10 -i ./img/%d.jpeg -c:v libx264 -r 30 -pix_fmt yuv420p kinect_video.mp4");
Note:
Make your Build target x64. This will increase the memory limit of the program.
I've coded a basic implementation regarding this. You can check out if you want.
Hope it helps :)
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.
So do we or do we not have a Serializable attribute in silverlight 4? I have some confusing responses on the internet. When I try to use it in my code, i get a namespace error. These are my includes
using System;
using System.ComponentModel;
using System.Collections.Generic;
using System.Runtime.Serialization;
I have the assemblies System ,System.Runtime.Serialization added to my project.
A follow up question is, if it is not available in Silverlight how do I correctly serialize a singleton? Since I was planning to use the example given here http://msdn.microsoft.com/en-us/library/system.runtime.serialization.iserializable.aspx
Thanks
That's a .NET attribute which you can't use in Silverlight, but you can use DataContract to serialize.
For stand-alone (non-WCF) serialization/deserialization, there are three components which can be used:
System.Runtime.Serialization.DataContractSerializer (from System.Runtime.Serialization.dll)
System.Runtime.Serialization.Json.DataContractJsonSerializer (from System.ServiceModel.Web.dll)
System.Xml.Serialization.XmlSerializer (from System.Xml.Serialization.dll)
A simple example using the DataContractSerializer:
string SerializeWithDCS(object obj)
{
if (obj == null) throw new ArgumentNullException("obj");
DataContractSerializer dcs = new DataContractSerializer(obj.GetType());
MemoryStream ms = new MemoryStream();
dcs.WriteObject(ms, obj);
return Encoding.UTF8.GetString(ms.GetBuffer(), 0, (int)ms.Position);
}
Example from this thread: http://forums.silverlight.net/forums/p/23161/82135.aspx
HI,
I'm new to Windows form app and trying to build one prototype app. I've designed a data entry form and coded the business logic. Now, I'm trying to open the data entry form from my welcome form. But every time I run "Welcome" form, my data entry form runs ( it's created before welcome form ) . Where can I set the form's order of execution ?
Here is the form1 code,
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using iTextSharp.text;
using iTextSharp.text.pdf;
using System.IO;
namespace PrototypeApp
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button3_Click(object sender, EventArgs e)
{
string pdfTemplate = "C:\\app\\End_Of_Project_Client_Evaluation_Template.pdf";
string newFile = "C:\\app\\End_Of_Project_Client_Evaluation_Template_update.pdf";
PdfReader reader = new PdfReader(pdfTemplate);
PdfStamper pdfStamper = new PdfStamper(reader, new FileStream(newFile, FileMode.Create));
AcroFields fields = pdfStamper.AcroFields;
fields.SetField("client", txtClient.Text);
fields.SetField("project", txtProject.Text);
fields.SetField("project_area", txtArea.Text);
fields.SetField("project_no", txtLandProjectNo.Text);
fields.SetField("suggestions", txtSuggestions.Text);
fields.SetField("project_strength", txtStrengths.Text);
fields.SetField("other_suggestions", txtComments.Text);
pdfStamper.FormFlattening = false;
// close the pdf
pdfStamper.Close();
MessageBox.Show("Pdf document successfully updated!!");
}
}
}
In your solution you have a file called Program.cs, open it and change the following line:
Application.Run(new Form1());
to
Application.Run(new WelcomeForm());
where WelcomeForm is the name of your welcome UI class. This change will make you welcome form to show up when you start the application, after that you can add some code to start the other form when you want.