Problem With Assembly.GetExecutingAssembly()

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Hi,
I am trying using below function in my code:

C#

var assembly = Assembly.GetExecutingAssembly();
            var resourceName = "C://reza.txt";
            string result = "";
            
            using (Stream stream = assembly.GetManifestResourceStream(resourceName))
            using (StreamReader reader = new StreamReader(stream))
            {
                 result = reader.ReadToEnd();
              
            }

But for this section: "new StreamReader(stream))
I get below errors:

XML

System.ArgumentNullException was unhandled
  Message=Value cannot be null.
Parameter name: stream
  Source=mscorlib
  ParamName=stream
  StackTrace:
       at System.IO.StreamReader..ctor(Stream stream, Encoding encoding, Boolean detectEncodingFromByteOrderMarks, Int32 bufferSize)
       at System.IO.StreamReader..ctor(Stream stream)
       at SendEmail.Program.Email(String ename, String name) in C:\Users\Reza\Desktop\Test_Projects\C#\SendEmail\SendEmail\Program.cs:line 44
       at SendEmail.Program.Main(String[] args) in C:\Users\Reza\Desktop\Test_Projects\C#\SendEmail\SendEmail\Program.cs:line 21
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException:

How to fix that?
Regards,

Posted 28-Aug-13 7:44am

Rezame

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Comments

[no name] 28-Aug-13 13:46pm

You need to check the number of braces that you have for your using statements.... hint hint.

Rezame 28-Aug-13 13:49pm

When compile script not shows any error.
but when try run I get this error.

[no name] 28-Aug-13 14:01pm

Yes... and? That is because stream is null. You are defining stream in one using block then it goes out of scope because you are missing the braces that define that using block, then you are trying to use a null object in another using block.

Rezame 28-Aug-13 14:06pm

Trying define as below:
using (StreamReader reader = new StreamReader(assembly.GetManifestResourceStream(resourceName)))
But same error.

OriginalGriff 28-Aug-13 14:18pm

Not true - you don't need curly brackets to delimit a block that consists of a single statement (but they are a good idea). His code indented shows what it happening without the brackets:
using (...)
using (...)
{
...
}

Rezame 28-Aug-13 14:20pm

So how define that?

OriginalGriff 28-Aug-13 14:28pm

You don't need to do anything to that, but it's a good idea to use brackets whenever you can - it makes life a lot less confusing! :laugh:
using (...)
{
using (...)
{
...
}
}

2 solutions

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OriginalGriff · Answer 1 · 2013-08-28T07:56:00

Solution 1

Try removing the "c:/" from your resource name.

Posted 28-Aug-13 7:56am

OriginalGriff

Comments

Rezame 28-Aug-13 14:13pm

Removed that.
Used only resource name, but same error.
tried add namespace name to that, same error again.

OriginalGriff 28-Aug-13 14:15pm

Where is your code, and where is the resource? Are they in the same DLL/EXE?

Rezame 28-Aug-13 14:19pm

This is part of console project.
First resource was in C drive, but now copied that in Project folder.
Copied in all folders of project.

Rezame 28-Aug-13 14:20pm

project is Console.
First resource was in C drive, but next copied that in all project folders.

OriginalGriff 28-Aug-13 14:26pm

So you just added the file to the project file? You didn't try to add it to the resources at all?
If you don't explicitly add a file to your resources, then it isn't available as a resource, it's just a file added to the project that needs no further attention from the compiler.
See here:
http://msdn.microsoft.com/en-us/library/7k989cfy(v=vs.90).aspx
I suspect you want to add your file as an embedded resource.

Rezame 28-Aug-13 14:39pm

My file name is: "reza.txt" and added in resource.
Now how must call that?
What is format?
var resourceName = "reza.txt";?
var resourceName = "namespace.reza.txt";?
or other?

OriginalGriff 29-Aug-13 4:56am

Try this:
Remove your resource reference to "reza.txt".
Open your Resources.resx in the solution explorer.
On the pane menu, select the left most drop down, and pick "Files". Then use the "Add Resource" drop down, and choose "Add existing file".
Browse to the reza.txt file and select that.
Now replace your code with this:
string result = Properties.Resources.reza;
Let's see what happens...

Bernhard Hiller · Answer 2 · 2013-08-28T20:50:00

Solution 2

In Visual Studio's solution explorer, right click on that item, select properties. Set "Build Action" to "Embedded resource". Then re-build your application.

Posted 28-Aug-13 20:50pm

Bernhard Hiller