Rafik Bari Rafik Bari - 17 days ago 4
C# Question

How can I extract a file from an embedded resource and save it to disk?

I'm trying to compile the code below using CSharpCodeProvider. The file is successfully compiled, but when I click on the generated EXE file, I get an error (Windows is searching for a solution to this problem) and nothing happens.

When I compile the code below using CSharpCodeProvider, I've added the

MySql.Data.dll
as an embedded resource file using this line of code:

if (provider.Supports(GeneratorSupport.Resources))
cp.EmbeddedResources.Add("MySql.Data.dll");


The file is successfully embedded (because I noticed the file size increased).

In the code below, I try to extract the embedded DLL file and save it to System32, but the code below doesn't work for some reason.

namespace ConsoleApplication1
{
class Program
{
public static void ExtractSaveResource(String filename, String location)
{
//Assembly assembly = Assembly.GetExecutingAssembly();
Assembly a = .Assembly.GetExecutingAssembly();
//Stream stream = assembly.GetManifestResourceStream("Installer.Properties.mydll.dll"); // or whatever
//string my_namespace = a.GetName().Name.ToString();
Stream resFilestream = a.GetManifestResourceStream(filename);
if (resFilestream != null)
{
BinaryReader br = new BinaryReader(resFilestream);
FileStream fs = new FileStream(location, FileMode.Create); // Say
BinaryWriter bw = new BinaryWriter(fs);
byte[] ba = new byte[resFilestream.Length];
resFilestream.Read(ba, 0, ba.Length);
bw.Write(ba);
br.Close();
bw.Close();
resFilestream.Close();
}
// this.Close();
}

static void Main(string[] args)
{
try
{
string systemDir = Environment.SystemDirectory;
ExtractSaveResource("MySql.Data.dll", systemDir);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
Console.ReadKey();
}
}
}
}


How can I extract the DLL file that is embedded as a resource and save it to System32?

Answer

I've been using this (tested) method:

OutputDir: Location where you want to copy the resource

ResourceLocation: Namespace (+ dirnames)

Files: List of files within the resourcelocation, you want to copy.

    private static void ExtractEmbeddedResource(string outputDir, string resourceLocation, List<string> files)
    {
        foreach (string file in files)
        {
            using (System.IO.Stream stream = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceLocation + @"." + file))
            {
                using (System.IO.FileStream fileStream = new System.IO.FileStream(System.IO.Path.Combine(outputDir, file), System.IO.FileMode.Create))
                {
                    for (int i = 0; i < stream.Length; i++)
                    {
                        fileStream.WriteByte((byte)stream.ReadByte());
                    }
                    fileStream.Close();
                }
            }
        }
    }