To include comments as part of control code, they need to be inside a code block of some sort, for example

    &lt;# // Hello this is a comment #&gt;

or

    &lt;#+ // Hello this is a comment in a class feature block #&gt;

Sometimes you need to push the close tag to the next line if you&#39;re sensitive to extra newlines in the output.

If you want to comment out whole blocks of markup, there isn&#39;t a straightforward solution unfortunately, and the result gets rather ugly.

You can do it by escaping the tags that you&#39;d like to comment, like so:

    \&lt;# my control code \#&gt;

and then placing that inside a comment in another block like so:

    &lt;# // \&lt;# my control code \#&gt; #&gt;






The best way to add block comment is to use #if and #endif


    &lt;#
       #if false
       foreach(var typeName in typeNames)
       { 
           var className = typeName + &quot;Adapter&quot;;
    #&gt;
        // ...
    &lt;#  
        }
        #endif
    #&gt;

I&#39;m trying to get the SHA256 of a string in Android.

Here is the PHP code that I want to match:

    echo bin2hex(mhash(MHASH_SHA256,&quot;asdf&quot;));
    //outputs &quot;f0e4c2f76c58916ec258f246851bea091d14d4247a2fc3e18694461b1816e13b&quot;

Now, in Java, I&#39;m trying to do the following:

     
                String password=&quot;asdf&quot;
                MessageDigest digest=null;
		try {
			digest = MessageDigest.getInstance(&quot;SHA-256&quot;);
		} catch (NoSuchAlgorithmException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
	       digest.reset();
	       try {
			Log.i(&quot;Eamorr&quot;,digest.digest(password.getBytes(&quot;UTF-8&quot;)).toString());
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

But this prints out: &quot;a42yzk3axdv3k4yh98g8&quot;

What did I do wrong here?

------------------------------------------------------
Solution thanks to erickson:

     

     Log.i(&quot;Eamorr&quot;,bin2hex(getHash(&quot;asdf&quot;)));

     public byte[] getHash(String password) {
	       MessageDigest digest=null;
		try {
			digest = MessageDigest.getInstance(&quot;SHA-256&quot;);
		} catch (NoSuchAlgorithmException e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}
	       digest.reset();
	       return digest.digest(password.getBytes());
	 }
	static String bin2hex(byte[] data) {
		return String.format(&quot;%0&quot; + (data.length*2) + &quot;X&quot;, new BigInteger(1, data));
	}



How can I calculate the SHA-256 hash of a string in Android?

I have a program that frequently uses an external program and reads its outputs.
It works pretty well using your usual process redirect output, but one specific argument for some reason hangs when I try to read it, no error message - no exception, it just &#39;stops&#39; when it reaches that line.
I of course use a centralized function to call and read output from the program, which is this:

    public string ADBShell(string adbInput)
    {
        try
        {
            //Create Empty values
            string result = string.Empty;
            string error = string.Empty;
            string output = string.Empty;
            System.Diagnostics.ProcessStartInfo procStartInfo 
                = new System.Diagnostics.ProcessStartInfo(toolPath + &quot;adb.exe&quot;);

            procStartInfo.Arguments = adbInput;
            procStartInfo.RedirectStandardOutput = true;
            procStartInfo.RedirectStandardError = true;
            procStartInfo.UseShellExecute = false;
            procStartInfo.CreateNoWindow = true;
            procStartInfo.WorkingDirectory = toolPath;
            System.Diagnostics.Process proc = new System.Diagnostics.Process();
            proc.StartInfo = procStartInfo;
            proc.Start();
            // Get the output into a string
            proc.WaitForExit();
            result = proc.StandardOutput.ReadToEnd();
            error = proc.StandardError.ReadToEnd();  //Some ADB outputs use this
            if (result.Length &gt; 1)
            {
                output += result;
            }
            if (error.Length &gt; 1)
            {
                output += error;
            }
            Return output;
        }
        catch (Exception objException)
        {
            throw objException;
        }
    }
The line that hangs is `result = proc.StandardOutput.ReadToEnd();`, but again, not every time, only when sent a specific argument (&quot;start-server&quot;). All other arguments work just fine - it reads the value and returns it.
It&#39;s also strange the way it hangs. It doesn&#39;t freeze or give an error or anything, it just stops processing. As if it was a &#39;return&#39; command, except it doesn&#39;t even return to the calling function, it just stops everything with the interface still up and running.
Anyone experienced this before? Anyone have any idea what I should try? I&#39;m assuming it&#39;s something unexpected within the stream itself, but is there a way I can handle/ignore this so that it reads it anyway?


StandardOutput.ReadToEnd() hangs

This seems like such a basic question, but I haven&#39;t been able to find an MSDN article or StackOverflow question that answers it: is it possible to make line comments or block comments in T4 templates?  I&#39;m not looking to generate code with comments (that&#39;s easy and straightforward) but rather comment out blocks of my T4 markup.  Is that possible?

Comments in T4 Templates

<p>This seems like such a basic question, but I haven't been able to find an MSDN article or StackOverflow question that answers it: is it possible to make line comments or block comments in T4 templates?  I'm not looking to generate code with comments (that's easy and straightforward) but rather comment out blocks of my T4 markup.  Is that possible?</p>


How do you comment out code in **PowerShell** (1.0 or 2.0)?


How do you comment out code in PowerShell?

How do I make multi-line comments? Most languages have block comment symbols like:

    /*

    */





How do I create multiline comments in Python?

In what ways can you comment in CoffeeScript?

The documentation say you can use three hash symbols to start and close a comment block:

    ###
      Comments
      go
      here
    ###

I&#39;ve found that I can sometimes use the following two formats

    `// backticks allow for straight-JavaScript,
     // but the closing backtick can&#39;t be on a comment line (I think?)
    `

Are there a simpler way to insert short comments in CoffeeScript?

Do NOT use this style**

Since this is getting a lot of views, I want to emphasize that

    /* Comment goes here */

produces a MATH error when the `/*` is on its own line.

As Trevor pointed out in a comment on the question, this is a **regular expression**, **NOT** a comment!


How do I comment in CoffeeScript? &quot;/* this */&quot; doesn&#39;t work

I used this syntax as I found online but it throws an error:

    xmlns:x=&quot;http://schemas.microsoft.com/winfx/2006/xaml&quot;
    &lt;!-- Cool comment --&gt;
    xmlns:System=&quot;clr-namespace:System;assembly=mscorlib&quot;

&gt; &#39;Name cannot begin with the &#39;&lt;&#39; character, hexadecimal value 0x3C.
&gt; Line 4, position 5.&#39; XML is not valid.



How to add comments into a Xaml file in WPF?

I have written huge MS DOS Batch file. To test this batch file I need to execute some lines only and want to hide/comment out remaining. 

I have some existing comment lines starting with `::` hence I cannot use `::` anymore as it will scramble all comments.

How can I solve this problem?


Commenting multiple lines in DOS batch file

I&#39;m using Entity Framework 5 with Visual Studio with Entity Framework Power Tools Beta 2 to reverse engineer moderately sized databases (~100 tables).

Unfortunately, the **navigation properties do not have meaningful names**. For example, if there are two tables:

&lt;!-- language: lang-sql --&gt;

    CREATE TABLE Contacts (
        ContactID INT IDENTITY (1, 1) NOT NULL,
        ...
        CONSTRAINT PK_Contacts PRIMARY KEY CLUSTERED (ContactID ASC)
    }

    CREATE TABLE Projects (
        ProjectID INT IDENTITY (1, 1) NOT NULL,
        TechnicalContactID INT NOT NULL,
        SalesContactID INT NOT NULL,
        ...
        CONSTRAINT PK_Projects PRIMARY KEY CLUSTERED (ProjectID ASC),
        CONSTRAINT FK_Projects_TechnicalContact FOREIGN KEY (TechnicalContactID)
            REFERENCES Contacts (ContactID),
        CONSTRAINT FK_Projects_SalesContact FOREIGN KEY (SalesContactID)
            REFERENCES Contacts (ContactID),
        ...
    }

This will generate classes like this:

&lt;!-- language: c# --&gt;
    
    public class Contact
    {
         public Contact()
         {
              this.Projects = new List&lt;Project&gt;();
              this.Projects1 = new List&lt;Project&gt;();
         }
         public int ContactID { get; set; }
         // ...
         public virtual ICollection&lt;Project&gt; Projects { get; set; }
         public virtual ICollection&lt;Project&gt; Projects1 { get; set; }
    }

    public class Project
    {
         public Project()
         {

         }
         public int ProjectID { get; set; }
         public int TechnicalContactID { get; set; }
         public int SalesContactID { get; set; }
         // ...
         public virtual Contact Contact { get; set; }
         public virtual Contact Contact1 { get; set; }
    }

I see several variants which would all be better than this:

- Use the **name of the foreign key**: For example, everything after the last underscore (`FK_Projects_TechnicalContact` --&gt; `TechnicalContact`). Though this probably would be the solution with the most control, this may be more difficult to integrate with the existing templates.
- Use the **property name** corresponding to the foreign key column: Strip off the suffix `ID` (`TechnicalContactID` --&gt; `TechnicalContact`)
- Use the **concatenation of property name and the existing solution**: Example `TechnicalContactIDProjects` (collection) and `TechnicalContactIDContact`

Luckily, [it is possible to modify the templates by including them in the project][1]. 

The modifications would have to be made to `Entity.tt` and `Mapping.tt`. I find it difficult due to the lack of intellisense and debug possibilities to make those changes.

---

*Concatenating property names* (third in above list) is probably the easiest solution to implement.

**How to change the creation of navigational properties in `Entity.tt` and `Mapping.tt` to achieve the following result**:

&lt;!-- language: c# --&gt;
    
    public class Contact
    {
         public Contact()
         {
              this.TechnicalContactIDProjects = new List&lt;Project&gt;();
              this.SalesContactIDProjects = new List&lt;Project&gt;();
         }
         public int ContactID { get; set; }
         // ...
         public virtual ICollection&lt;Project&gt; TechnicalContactIDProjects { get; set; }
         public virtual ICollection&lt;Project&gt; SalesContactIDProjects { get; set; }
    }

    public class Project
    {
         public Project()
         {

         }
         public int ProjectID { get; set; }
         public int TechnicalContactID { get; set; }
         public int SalesContactID { get; set; }
         // ...
         public virtual Contact TechnicalContactIDContact { get; set; }
         public virtual Contact SalesContactIDContact { get; set; }
    }



  [1]: http://romiller.com/2012/05/09/customizing-reverse-engineer-code-first-in-the-ef-power-tools/

Content Type	Original Author	Original Content on Stackoverflow
Question	amoss	View Question on Stackoverflow
Solution 1 - Comments	GarethJ	View Answer on Stackoverflow
Solution 2 - Comments	engineforce	View Answer on Stackoverflow

Comments in T4 Templates

Comments Problem Overview

Comments Solutions

Solution 1 - Comments

Solution 2 - Comments

StandardOutput.ReadToEnd() hangs

How can I calculate the SHA-256 hash of a string in Android?

Attributions