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C# (xamarin project) not able to find path to the file

I have this problem when I'm trying to read JSON file (or any file): It's not able to find that file. I try everything, even the absolute path (error almost same - DirectoryNotFound)
This is structure of mine code:
And this is code:
private void LoadJson()
{
using (var r = new StreamReader("quizQuestions.json"))
{
string json = r.ReadToEnd();
items = JsonConvert.DeserializeObject<List<Questions>>(json);
}
}
I I even try to use Directory.GetCurrentDirectory() but it's returning : / -> only this character. I don't know where is a mistake or if I forgot to set something. I try to find answers everywhere but I was not able to find anything with this.

Make sure the Build Action of the file is set as Content or as an Asset and give this a try.
private void LoadJson()
{
AssetManager assets = this.Assets;
using (var r = new StreamReader(assets.Open ("quizQuestions.json")))
{
string json = r.ReadToEnd();
items = JsonConvert.DeserializeObject<List<Questions>>(json);
}
}

You can configure the file as Embedded Resource and then access it like this:
public static Stream GetEmbeddedResourceStream(Assembly assembly, string resourceFileName)
{
var resourceNames = assembly.GetManifestResourceNames();
var resourcePaths = resourceNames
.Where(x => x.EndsWith(resourceFileName, StringComparison.CurrentCultureIgnoreCase)).ToArray();
if (resourcePaths.Any() && resourcePaths.Count() == 1)
{
return assembly.GetManifestResourceStream(resourcePaths.Single());
}
return null; // or throw Exception
}
private void LoadJson()
{
Assembly assembly = GetAssemblyContainingTheJson();
using (var r = GetEmbeddedResourceStream(assembly, "quizQuestions.json"))
{
string json = r.ReadToEnd();
items = JsonConvert.DeserializeObject<List<Questions>>(json);
}
}

C# Runtime Compilation with CSharpCodeProvider

I have had success using this tutorial: http://www.codeproject.com/Tips/715891/Compiling-Csharp-Code-at-Runtime to set up a framework for runtime compilation and execution of C# code. Below is the code I currently have:
public static class CodeCompiler {
public static object InterpretString(string executable) {
string compilation_string =
#"
static class RuntimeCompilationCode {
public static void Main() {}
public static object Custom() {
/* CODE HERE */
}
}";
compilation_string = compilation_string.Replace("/* CODE HERE */", executable);
CSharpCodeProvider provider = new CSharpCodeProvider();
CompilerParameters compiler_parameters = new CompilerParameters();
// True - memory generation, false - external file generation
compiler_parameters.GenerateInMemory = true;
// True - exe file generation, false - dll file generation
compiler_parameters.GenerateExecutable = true;
// Compile
CompilerResults results = provider.CompileAssemblyFromSource(compiler_parameters, compilation_string);
// Check errors
if (results.Errors.HasErrors) {
StringBuilder builder = new StringBuilder();
foreach (CompilerError error in results.Errors) {
builder.AppendLine(String.Format("Error ({0}): {1}", error.ErrorNumber, error.ErrorText));
}
throw new InvalidOperationException(builder.ToString());
}
// Execute
Assembly assembly = results.CompiledAssembly;
Type program = assembly.GetType("RuntimeCompilationCode");
MethodInfo execute = program.GetMethod("Custom");
return execute.Invoke(null, null);
}
}
I can pass a statement in the form of a string (ex. "return 2;") to InterpretString() and it will be compiled and executed as part of the Custom() function. However I am wondering if it is possible to use the same approach to execute a method that is in my original file. For instance, suppose the CodeCompiler class had another method returnsTwo() which returns the integer 2. Is there a way to call such a method by passing "CodeCompiler.returnsTwo();" or a similar string to InterpretString()?

Provided that the function is a static function this should not be a problem, as long as you add the appropriate reference to the compilation. I've done this short of thing on several projects.
If the CodeCompiler is in your current executable you have to include the references in this fashion:
string exePath = Assembly.GetExecutingAssembly().Location;
string exeDir = Path.GetDirectoryName(exePath);
AssemblyName[] assemRefs = Assembly.GetExecutingAssembly().GetReferencedAssemblies();
List<string> references = new List<string>();
foreach (AssemblyName assemblyName in assemRefs)
references.Add(assemblyName.Name + ".dll");
for (int i = 0; i < references.Count; i++)
{
string localName = Path.Combine(exeDir, references[i]);
if (File.Exists(localName))
references[i] = localName;
}
references.Add(exePath);
CompilerParameters compiler_parameters = new CompilerParameters(references.ToArray())

Importing submodule using custom importer contains "<module>" in find_module fullname parameter

Currently I'm working on a custom importer for Ironpython, which should add an abstraction layer for writing custom importer. The abstraction layer is an IronPython module, which bases on PEP 302 and the IronPython zipimporter module. The architecture looks like this:
For testing my importer code, I've written a simple test package with modules, which looks like this:
/Math/
__init__.py
/MathImpl/
__init__.py
__Math2__.py
/Math/__init__.py:
print ('Import: /Math/__init__.py')
/Math/MathImpl/__init__.py:
# Sample math package
print ('Begin import /Math/MathImpl/__init__.py')
import Math2
print ('End import /Math/MathImpl/__init__.py: ' + str(Math2.add(1, 2)))
/Math/MathImpl/Math2.py:
# Add two values
def add(x, y):
return x + y
print ('Import Math2.py!')
If i try to import MathImpl like this in a script: import Math.MathImpl
My genericimporter get's called and searchs for some module/package in the find_module method. Which returns an instance of the importer if found, else not:
public object find_module(CodeContext/*!*/ context, string fullname, params object[] args)
{
// Set module
if (fullname.Contains("<module>"))
{
throw new Exception("Why, why does fullname contains <module>?");
}
// Find resolver
foreach (var resolver in Host.Resolver)
{
var res = resolver.GetModuleInformation(fullname);
// If this script could be resolved by some resolver
if (res != ResolvedType.None)
{
this.resolver = resolver;
return this;
}
}
return null;
}
If find_module is called the first time,fullname contains Math, which is ok, because Math should be imported first. The second time find_module is called, Math.MathImpl should be imported, the problem here is, that fullname has now the value <module>.MathImpl, instead of Math.MathImpl.
My idea was, that the module name (__name__) is not set correctly when Math was imported, but i set this in any case when importing the module in load_module:
public object load_module(CodeContext/*!*/ context, string fullname)
{
string code = null;
GenericModuleCodeType moduleType;
bool ispackage = false;
string modpath = null;
PythonModule mod;
PythonDictionary dict = null;
// Go through available import types by search-order
foreach (var order in _search_order)
{
string tempCode = this.resolver.GetScriptSource(fullname + order.Key);
if (tempCode != null)
{
moduleType = order.Value;
code = tempCode;
modpath = fullname + order.Key;
Console.WriteLine(" IMPORT: " + modpath);
if ((order.Value & GenericModuleCodeType.Package) == GenericModuleCodeType.Package)
{
ispackage = true;
}
break;
}
}
// of no code was loaded
if (code == null)
{
return null;
}
var scriptCode = context.ModuleContext.Context.CompileSourceCode
(
new SourceUnit(context.LanguageContext, new SourceStringContentProvider(code), modpath, SourceCodeKind.AutoDetect),
new IronPython.Compiler.PythonCompilerOptions() { },
ErrorSink.Default
);
// initialize module
mod = context.ModuleContext.Context.InitializeModule(modpath, context.ModuleContext, scriptCode, ModuleOptions.None);
dict = mod.Get__dict__();
// Set values before execute script
dict.Add("__name__", fullname);
dict.Add("__loader__", this);
dict.Add("__package__", null);
if (ispackage)
{
// Add path
string subname = GetSubName(fullname);
string fullpath = string.Format(fullname.Replace(".", "/"));
List pkgpath = PythonOps.MakeList(fullpath);
dict.Add("__path__", pkgpath);
}
else
{
StringBuilder packageName = new StringBuilder();
string[] packageParts = fullname.Split(new char[] { '/' });
for (int i = 0; i < packageParts.Length - 1; i++)
{
if (i > 0)
{
packageName.Append(".");
}
packageName.Append(packageParts[i]);
}
dict["__package__"] = packageName.ToString();
}
var scope = context.ModuleContext.GlobalScope;
scriptCode.Run(scope);
return mod;
}
I hope some one has an idea, why this happens. A few line which also may cause the problem are:
var scriptCode = context.ModuleContext.Context.CompileSourceCode
(
new SourceUnit(context.LanguageContext, new SourceStringContentProvider(code), modpath, SourceCodeKind.AutoDetect),
new IronPython.Compiler.PythonCompilerOptions() { },
ErrorSink.Default
);
and
mod = context.ModuleContext.Context.InitializeModule(modpath, context.ModuleContext, scriptCode, ModuleOptions.None);
Because i don't know, whether creating a module this way is completly correct.
The problem can be reproduced downloading this project/branch: https://github.com/simplicbe/Simplic.Dlr/tree/f_res_noid and starting Sample.ImportResolver. An exception in find_module will be raised.
Thank you all!

This problem is solved. Modpath what not allowed to contains /. In general only chars were allowed, which also can be in a file-name.
Maybe this is helpful for someone else...

Windows Phone 7: Check If Resource Exists

I need to check whether an embedded resource exists. In WPF this i relatively easy, but in WP7 I get a MissingManifestResourceException
The WPF code which works is:
public static IEnumerable<object> GetResourcePaths(Assembly assembly) {
var culture = System.Threading.Thread.CurrentThread.CurrentCulture;
//var resourceName = assembly.GetName().Name + ".g";
var assemblyName = assembly.FullName.Split(',')[0];
var resourceName = assemblyName + ".g";
var resourceManager = new ResourceManager(assemblyName, assembly);
try {
var resourceSet = resourceManager.GetResourceSet(culture, true, true);
foreach (System.Collections.DictionaryEntry resource in resourceSet) {
yield return resource.Key;
}
} finally {
resourceManager.ReleaseAllResources();
}
}
I tried replacing it with the code below, which resulted in the exception (on line 9). Is there a way to do this in Silverlight / WP7?
public static IEnumerable<object> GetResourcePaths(Assembly assembly) {
var culture = System.Threading.Thread.CurrentThread.CurrentCulture;
//var resourceName = assembly.GetName().Name + ".g";
var assemblyName = assembly.FullName.Split(',')[0];
var resourceName = assemblyName + ".g";
var resourceManager = new ResourceManager(assemblyName, assembly);
try {
var resourceSet = resourceManager.GetResourceSet(culture, true, true);
foreach (System.Collections.DictionaryEntry resource in resourceSet) {
yield return resource.Key;
}
} finally {
resourceManager.ReleaseAllResources();
}
}

The answer to this previous question: WP7: collection of images seems to indicate that you might need to get a stream before calling GetResourceSet:
var NOT_USED = rm.GetStream("app.xaml"); // without getting a stream, next statement doesn't work - bug?
Sounds a bit hacky, but if it works ;)

C#: Reading the content of a file, which is embedded in a resource file

How can I read a text file, which is embedded in a resx file with the help of the ResourceManager class?
Whats wrong with the following snippet?
ResourceManager resman = new ResourceManager("Mynamespace.RESXFileName", Assembly.GetExecutingAssembly());
Stream stream = resman2.GetStream("ResourceName");
stream is alway = null!

using (var resourceStream = Assembly.GetExecutingAssembly()
.GetManifestResourceStream(resourceName))
{
if (resourceStream != null)
{
using (var textStreamReader = new StreamReader(resourceStream))
{
text = textStreamReader.ReadToEnd();
}
}
else
{
throw (new MissingManifestResourceException(resourceName));
}
}
The resource name is determined by namespace and filename. Say file MyTxt.txt exists in the root of the project, which has default namespace MyNs then the resource name will be: MyNs.MyTxt.txt
EDIT
I should learn to read the question. I haven't tested but this should give you what you want:
static object GetResxObject(string resxPathName, string resourceKey)
{
using (var resxReader = new ResXResourceReader(resxPathName))
{
return resxReader
.Cast<DictionaryEntry>()
.Single(d => string.Equals(d.Key,
resourceKey))
.Value;
}
}
...
var myString=(string)GetResxObject(#"path\to\resx.resx","myStringKey");

<ResourceNamespace>.ResourceManager.GetString(<textresourcename>);