I'm creating project api in .Net Core 2.1, in my startup.cs, I added:
services.AddSingleton<IPathProvider, PathProvider>();
After that, reate IPathProvider interface and class:
public interface IPathProvider
{
string MapPath(string path);
}
public class PathProvider : IPathProvider
{
private IHostingEnvironment _hostingEnvironment;
public PathProvider(IHostingEnvironment environment)
{
_hostingEnvironment = environment;
}
public string MapPath(string path)
{
var filePath = Path.Combine(_hostingEnvironment.WebRootPath, path);
return filePath;
}
}
And then, in my api cs file, I write code:
private IHostingEnvironment _hostingEnvironment;
public PowerControlController(IHostingEnvironment environment)
{
_hostingEnvironment = environment;
}
public string MapPath(string path)
{
var filePath = Path.Combine(_hostingEnvironment.WebRootPath, path);
return filePath;
}
Now, in main api, I call mappath:
public ActionResult<string> GetListPowerSwitch()
{
try
{
var path = MapPath("../DataDen/DataDen.xml");
return path;
}
catch (Exception ex)
{
return ex.ToString();
}
}
It's work well when debug in local. But, when I publish it to IIS Web Server as new application, it's return ex.ToString() that:
System.ArgumentNullException: Value cannot be null.
Parameter name: path1
at System.IO.Path.Combine(String path1, String path2)
at LedControlPowerApi.Controllers.PowerControlController.GetListPowerSwitch() in E:\PROJECT EMEC\LedControlPrj\LedControlPowerApi\Controllers\PowerControlController.cs:line 55
Line 55 is: var path = MapPath("../DataDen/DataDen.xml");
Anyone tell me how to fix this bug ? Thanks
I think you need to use ContentRoot instead of WebRoot because for ASP.NET Core 2 API project there is no wwwroot folder in published API project.
Check this https://github.com/aspnet/Mvc/issues/6688
Related
Amazon provides a vast documentation, but there are so many docs that I'm lost, so here is my current service for upload/download files. Upload works as expected but on the download its where I have to download the files to a physical path and later serve the download to the user, I don't have much experience working with streams. Here is the FileManagerService class that connects to Amazon API.
using Amazon.S3;
using Amazon.S3.Model;
public class FileManagerService
{
public FileManagerService()
{
string serverPath = HttpContext.Current.Server.MapPath("~/");
string uploadPath = Path.Combine(serverPath, "FileUploads");
Directory.CreateDirectory(uploadPath);
UploadDirectory = uploadPath;
}
private string UploadDirectory { get; set; }
private docucloudEntities db = new docucloudEntities();
private IAmazonS3 S3Client = new AmazonS3Client();
private string S3Bucket = "bucketname";
public async Task<string> DownloadFile(string AmazonFileKey, string FileName)
{
var fileRequest = new GetObjectRequest
{
BucketName = S3Bucket,
Key = AmazonFileKey
};
var localRoute = Path.Combine(UploadDirectory, FileName);
using (var fileObject = await S3Client.GetObjectAsync(fileRequest))
{
if (fileObject.HttpStatusCode == HttpStatusCode.OK)
{
fileObject.WriteResponseStreamToFile(localRoute);
}
}
return localRoute;
}
}
This method returns the string, it's not complete yet with try catch blocks, but it currently works. Here is my controller method that download the file to the client:
public class FileManagerController : Controller
{
private FileManagerService FileService = new FileManagerService();
public async Task<ActionResult> DownloadFileAmazon(long FileId)
{
if (db.Archivos.Any(i => i.ArchivoID == FileId))
{
var archivo = db.Archivos.Single(i => i.ArchivoID == FileId);
var rutaarchivo = await FileService.DownloadFile(archivo.Ruta, archivo.Nombre);
if (System.IO.File.Exists(rutaarchivo))
{
var fileBytes = System.IO.File.ReadAllBytes(rutaarchivo);
var response = new FileContentResult(fileBytes, "application/octet-stream");
response.FileDownloadName = archivo.Nombre;
System.IO.File.Delete(rutaarchivo);
return response;
}else
{
return HttpNotFound();
}
}else
{
return HttpNotFound();
}
}
}
So here on the controller I read the file bytes and serve the download, after deleting the file, but this could lead to a slower perfomance, its there a way of achieving direct download.
As far as I can tell there is no reason to dispose GetObjectResponse (return type of GetObjectAsync) even if the docs says so. GetObjectResponse is not implementing IDisposable but is inheriting StreamResponse that is. However, as far as I can tell it's only disposing the ResponseStream. So you could return the stream from GetObjectResponse (fileObject.ResponseStream) together with the ContentTypefrom the headers (fileObject.Headers.ContentType) that you then can return as a file in your controller:
[HttpGet]
[Route("blob/{filename}")]
public async Task<IActionResult> GetFile(string filename)
{
try
{
var file = await _fileStorageService.GetBlobAsync(filename);
return File(file.Stream, file.ContentType);
}
catch (Exception ex)
{
// Handle exceptions
}
}
FileResult will dispose the stream after it has written the file so there the stream will finally get disposed.
I used ELAMH 1.2 to log errors in MVC 5. It work well for 404 500... HTTP errors and in controller's catch blocks.
public ActionResult Index()
{
Elmah.ErrorSignal.FromCurrentContext().Raise(new Exception("test"));
try
{
var a = 0;
var b = 1 / a;
}
catch(Exception e)
{
Elmah.ErrorSignal.FromCurrentContext().Raise(e);
}
return View();
}
i get two log for this code.
but it dosent work in a static class like below. i dont get any exception while running ErrorSignal.FromCurrentContext().Raise(e);.
public static class FileUtility
{
public static string SaveSampleFile(HttpPostedFileBase file)
{
try
{
var b = 0;
var a = 1/b;
}
catch (Exception e)
{
ErrorSignal.FromCurrentContext().Raise(e);
return null;
}
}
}
no error log nothing happen!
I have also seen this problem when calling ELMAH logger without any HttpContext in class library projects.
I used the old manual way to get around this:
Elmah.ErrorLog.GetDefault(null).Log(new Error(ex));
I am trying to make SignalR server and client architecture in which i am able to connect to "http://localhost:8080" or http://127.0.0.1:8080/ but i am not able to connect my local ip address like "192. x.x.x" so what could be reason?
please help me i am also placing my code overhere...
public partial class WinFormsServer : Form
{
private IDisposable SignalR { get; set; }
const string ServerURI = "http://localhost:8080";
private void ButtonStart_Click(object sender, EventArgs e)
{
WriteToConsole("Starting server...");
ButtonStart.Enabled = false;
Task.Run(() => StartServer());
}
private void StartServer()
{
try
{
SignalR = WebApp.Start(ServerURI);
}
catch (TargetInvocationException)
{
WriteToConsole("Server failed to start. A server is already running on " + ServerURI);
//Re-enable button to let user try to start server again
this.Invoke((Action)(() => ButtonStart.Enabled = true));
return;
}
this.Invoke((Action)(() => ButtonStop.Enabled = true));
WriteToConsole("Server started at " + ServerURI);
}
class Startup
{
public void Configuration(IAppBuilder app)
{
app.UseCors(CorsOptions.AllowAll);
app.MapSignalR();
}
}
}
I tried different solutions but could not find correct one.
Finally I found the issue that was only related to the permission.
Run your SignalR server application as administrator. It will start running on the local IP like 192.168.X.X:9090 and then your client application can connect this server from any other PC using this IP address.
class Program
{
static void Main(string[] args)
{
var url = $"http://{GetLocalIPAddress()}:8080";
using (WebApp.Start<Startup>(url))
{
Console.WriteLine($"Server running at {{{url}}}");
Console.ReadLine();
}
}
public static string GetLocalIPAddress()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
foreach (var ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
{
return ip.ToString();
}
}
throw new Exception("Local IP Address Not Found!");
}
}
To get your local IP address you could use this function:
public static string GetLocalIPAddress()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
foreach (var ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
{
return ip.ToString();
}
}
throw new Exception("Local IP Address Not Found!");
}
If you want to use FQDN - Fully Qualified Domain Name, then you could use this function:
public static string GetLocalFQDN()
{
var props = IPGlobalProperties .GetIPGlobalProperties();
return props.HostName + (string.IsNullOrWhiteSpace(props.DomainName) ? "" : "." + props.DomainName);
}
After that you could use:
SignalR = WebApp.Start("http://" + GetLocalFQDN() + ":8080");
or
SignalR = WebApp.Start("http://" + GetLocalIPAddress() + ":8080");
I hope this helps.
Since you are using this source i used the same too.
-For FQDN, first create the function below.
public static string GetLocalFQDN()
{
var props = IPGlobalProperties.GetIPGlobalProperties();
return props.HostName + (string.IsNullOrWhiteSpace(props.DomainName) ? "" : "." + props.DomainName);
}
Then modify the const string ServerURI to:
string ServerURI =String.Concat("http://",GetLocalFQDN(),":8080");
-For LocalIPAdress, first create the function below which will the your local address:
public static string GetLocalIPAddress()
{
var host = Dns.GetHostEntry(Dns.GetHostName());
foreach (var ip in host.AddressList)
{
if (ip.AddressFamily == AddressFamily.InterNetwork)
{
return ip.ToString();
}
}
throw new Exception("Local IP Address Not Found!");
}
and change the string ServerURI =String.Concat("http://",GetLocalFQDN(),":8080"); to:
string ServerURI =String.Concat("http://",GetLocalIPAddress(),":8080");
Hope this helps you.
Note: The changes should be done in the WinFormsServer:Form class on the WinFormsServer project.
I have an external dll written in C# and I studied from the assemblies documentation that it writes its debug messages to the Console using Console.WriteLine.
this DLL writes to console during my interaction with the UI of the Application, so i don't make DLL calls directly, but i would capture all console output , so i think i got to intialize in form load , then get that captured text later.
I would like to redirect all the output to a string variable.
I tried Console.SetOut, but its use to redirect to string is not easy.
As it seems like you want to catch the Console output in realtime, I figured out that you might create your own TextWriter implementation that fires an event whenever a Write or WriteLine happens on the Console.
The writer looks like this:
public class ConsoleWriterEventArgs : EventArgs
{
public string Value { get; private set; }
public ConsoleWriterEventArgs(string value)
{
Value = value;
}
}
public class ConsoleWriter : TextWriter
{
public override Encoding Encoding { get { return Encoding.UTF8; } }
public override void Write(string value)
{
if (WriteEvent != null) WriteEvent(this, new ConsoleWriterEventArgs(value));
base.Write(value);
}
public override void WriteLine(string value)
{
if (WriteLineEvent != null) WriteLineEvent(this, new ConsoleWriterEventArgs(value));
base.WriteLine(value);
}
public event EventHandler<ConsoleWriterEventArgs> WriteEvent;
public event EventHandler<ConsoleWriterEventArgs> WriteLineEvent;
}
If it's a WinForm app, you can setup the writer and consume its events in the Program.cs like this:
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
using (var consoleWriter = new ConsoleWriter())
{
consoleWriter.WriteEvent += consoleWriter_WriteEvent;
consoleWriter.WriteLineEvent += consoleWriter_WriteLineEvent;
Console.SetOut(consoleWriter);
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
static void consoleWriter_WriteLineEvent(object sender, Program.ConsoleWriterEventArgs e)
{
MessageBox.Show(e.Value, "WriteLine");
}
static void consoleWriter_WriteEvent(object sender, Program.ConsoleWriterEventArgs e)
{
MessageBox.Show(e.Value, "Write");
}
It basically amounts to the following:
var originalConsoleOut = Console.Out; // preserve the original stream
using(var writer = new StringWriter())
{
Console.SetOut(writer);
Console.WriteLine("some stuff"); // or make your DLL calls :)
writer.Flush(); // when you're done, make sure everything is written out
var myString = writer.GetStringBuilder().ToString();
}
Console.SetOut(originalConsoleOut); // restore Console.Out
So in your case you'd set this up before making calls to your third-party DLL.
You can also call SetOut with Console.OpenStandardOutput, this will restore the original output stream:
Console.SetOut(new StreamWriter(Console.OpenStandardOutput()));
Or you can wrap it up in a helper method that takes some code as an argument run it and returns the string that was printed. Notice how we gracefully handle exceptions.
public string RunCodeReturnConsoleOut(Action code)
{
string result;
var originalConsoleOut = Console.Out;
try
{
using (var writer = new StringWriter())
{
Console.SetOut(writer);
code();
writer.Flush();
result = writer.GetStringBuilder().ToString();
}
return result;
}
finally
{
Console.SetOut(originalConsoleOut);
}
}
Using solutions proposed by #Adam Lear and #Carlo V. Dango I created a helper class:
public sealed class RedirectConsole : IDisposable
{
private readonly Action<string> logFunction;
private readonly TextWriter oldOut = Console.Out;
private readonly StringWriter sw = new StringWriter();
public RedirectConsole(Action<string> logFunction)
{
this.logFunction = logFunction;
Console.SetOut(sw);
}
public void Dispose()
{
Console.SetOut(oldOut);
sw.Flush();
logFunction(sw.ToString());
sw.Dispose();
}
}
which can be used in the following way:
public static void MyWrite(string str)
{
// print console output to Log/Socket/File
}
public static void Main()
{
using(var r = new RedirectConsole(MyWrite)) {
Console.WriteLine("Message 1");
Console.WriteLine("Message 2");
}
// After the using section is finished,
// MyWrite will be called once with a string containing all messages,
// which has been written during the using section,
// separated by new line characters
}
Anyone knows how to develop an add-in for PowerDesigner? I was reading the document of PowerDesigner about how to create an ActiveX Add-in, it says "The ActiveX must implement a specific interface called IPDAddIn to become a PowerDesigner add-in.". But I don't know where the interface IPDAddIn is, and how to implement it ?
Here is the online document
I have this old example, which could give some ideas, even if not everything it up-to-date.
using PdAddInTypLib;
namespace MineSpace
{
[ComVisible(true)]
[Guid("A6FA0D26-77E8-4DD3-B27E-F4050C3D5188")]
public class Launcher : IPdAddIn {
// Main() manages the console or GUI interface
// the PdAddIn interface is managed by an instance of Launcher
[ComVisible(false)]
[STAThread]
public static void Main(String[] args) {
}
public Launcher() {
_app = null;
}
// IPdAddIn implementation
public void Initialize(Object anApplication) {
try {
_app = (PdCommon.Application)anApplication;
}
catch (Exception e) {
// process
}
}
public void Uninitialize() {
}
public String ProvideMenuItems(String aMenu, Object anObj) {
return "";
}
public int IsCommandSupported(String aMenu, Object anObj, String aCommand) {
return 0;
}
public void DoCommand(String aMenu, Object anObj, String aCommand) {
}
private PdCommon.Application _app;
}
}
with the corresponding part in the class declaration:
[HKEY_CLASSES_ROOT\MyPlugin.Launcher]
#="MyPlugin.Launcher"
[HKEY_CLASSES_ROOT\MyPlugin.Launcher\CLSID]
#="{13749EFC-1ADA-4451-8C47-FF0B545FF172}"
[HKEY_CLASSES_ROOT\CLSID\{13749EFC-1ADA-4451-8C47-FF0B545FF172}]
#="MyPlugin.Launcher"
[HKEY_CLASSES_ROOT\CLSID\{13749EFC-1ADA-4451-8C47-FF0B545FF172}\InprocServer32]
#="C:\windows\System32\mscoree.dll"
"ThreadingModel"="Both"
"Class"="MyPlugin.Launcher"
"Assembly"="MyPlugin, Version=1.0.1402.33688, Culture=neutral, PublicKeyToken=null"
"RuntimeVersion"="v1.0.3705"
[HKEY_CLASSES_ROOT\CLSID\{13749EFC-1ADA-4451-8C47-FF0B545FF172}\ProgId]
#="MyPlugin.Launcher"
[HKEY_CLASSES_ROOT\CLSID\{13749EFC-1ADA-4451-8C47-FF0B545FF172}\Implemented Categories\{62C8FE65-4EBB-45E7-B440-6E39B2CDBF29}]
And the corresponding code to declare the add-in in PowerDesigner. If the File value is present, PowerDesigner could call DllRegisterServer on it, if the component is not yet registered.
[HKEY_LOCAL_MACHINE\SOFTWARE\Sybase\PowerDesigner 10\Addins\MyPlugin Launcher]
"Enable"="No"
"Class"="MyPlugin.Launcher"
"Type"="ActiveX"
"File"="d:\\myplugin\\myplugin.exe"