When I click on the button I get an error: Result: Stream was null (System.NullReferenceExceoption)

private void btScreenshot_Click(object sender, EventArgs e)
        {

    string exePath = "c:\\tmp\\adb.exe";    
    ExtractResource("Properties.Resources.AndroidBSPinstaller.adb.exe", exePath);
}

void ExtractResource(string resource, string path)
    {
        Stream stream = GetType().Assembly.GetManifestResourceStream(resource);
        byte[] bytes = new byte[(int)stream.Length];
        stream.Read(bytes, 0, bytes.Length);
        File.WriteAllBytes(path, bytes);
    }

CodePudding user response：

Here is a method to extract a file from resources

public static class ResourceExtensions
{
    /// <summary>
    /// Given a project resource extract to desired location
    /// </summary>
    /// <param name="BytesToWrite">Resource</param>
    /// <param name="FileName">File name with extension and path is optional</param>
    public static void FileSave(this byte[] BytesToWrite, string FileName)
    {

        if (File.Exists(FileName))
        {
            File.Delete(FileName);
        }

        var FileStream = new FileStream(FileName, FileMode.OpenOrCreate);
        var BinaryWriter = new BinaryWriter(FileStream);

        BinaryWriter.Write(BytesToWrite);
        BinaryWriter.Close();
        FileStream.Close();

    }
}

Usage (path is in a TextBox but can easily be changed to any existing folder)

private void ExtractButton_Click(object sender, EventArgs e)
{

    if (!string.IsNullOrWhiteSpace(FileNameTextBox.Text))
    {
        Resources.ColorCop.FileSave(FileNameTextBox.Text);
        Process.Start(FileNameTextBox.Text);
    }
       
}

Resource in project

Edit: changed to Embedded resource

NOTE: The full path will always begin with the default namespace.

For my app it's: read_stream_embedded_exe_onclick.

Suggested workaround

Have you considered just setting the adb.exe file be a Copy to Output Directory and calling Process.Start to launch it? (Or if copying is the end goal, copy it to @"c:\tmp\adb.exe" from there.)

CodePudding user response：

See picture fot the output. the file is copyd to "c:\tmp\adb.exe"