IIS8 HTTP Error 500.19 – Internal Server Error

Taswar Bhatti December 19, 2013 No Comments

If you are running Windows Server 2012 with IIS8 and you got this error HTTP Error 500.19 – Internal Server Error. If you web.config file contains “handler” or “modules” tag. In order to fix this, launch cmd or powershell and execute these 2 commands inside of C:\Windows\System32\InetSrv

PS C:\Windows\System32\InetSrv>.\appcmd.exe unlock config -section:system.webServer/handlers

PS C:\Windows\System32\InetSrv> .\appcmd unlock config -section:system.webServer/modules

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PS C:\Windows\System32\InetSrv>.\appcmd.exe unlock config -section:system.webServer/handlers

PS C:\Windows\System32\InetSrv> .\appcmd unlock config -section:system.webServer/modules

This will unlock the handlers and modules […]

.NET, ASP .NET

IIS

C# tip: use params for method that takes variable number of arguments

Taswar Bhatti December 16, 2013 No Comments

In C# there is a params keyword which allows a method parameter to take variable number of arguments. MSDN Some notes on param It must always be the last parameter in the function/method definition There can only be one params keyword in a function/method parameter signature Example:

int Sum(int[] args)
{
  int sum = 0;
  foreach (var item in args)
  {
    sum += item;
  }

  return sum;
}

//calling the above Sum method we would call it like
int[] array = new int[] {1, 2, 3}
int result = Sum(array);

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int Sum(int[] args)

{

int sum = 0;

foreach (var item in args)

{

sum += item;

}

return sum;

}

//calling the above Sum method we would call it like

int[] array = new int[] {1, 2, 3}

int result = Sum(array);

But by changing it to params we […]

.NET, C#

.net, C#, csharp, dotnet

Phantomjs talk in Ottawa JS Meetup

Taswar Bhatti December 12, 2013 No Comments

Thanks to everyone who came out last night at OttawaJS for the phantomjs talk, the slides are located at slid.es. You can find the code in my github account. https://github.com/taswar/ottawajs-dec2013 A recap of things we covered: Simple screencapture CoffeeScript with phantomjs Scraping hackernews and dzone site for links using webdriver to integrate with phantomjs (python […]

Links, Misc

Javascript, Jruby, ottawajs, phantomjs, talk

C# tip: out parameter keyword

Taswar Bhatti December 11, 2013 No Comments

In C# there is the out parameter keyword which causes arguments to be passed by reference. It is like the ref keyword, except that ref requires that the variable be initialized before it is passed. Example:

void Init(out int x)
{
 x = 47;
}

int x;

Init(out x);

Console.WriteLine(x); //x now is 47

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void Init(out int x)

{

x = 47;

}

int x;

Init(out x);

Console.WriteLine(x); //x now is 47

The out parameter keyword provides a way for a method to output multiple values from a method without […]

.NET, C#

.net, C#, csharp, dotnet

C# the use of ref keyword

Taswar Bhatti December 6, 2013 No Comments

In C# when using the ref keyword it causes an argument to be passed by reference, not by value. In order to use a ref as a parameter, both the method definition and the calling method must explicitly use the ref keyword, and also the variable must be initialized before passing in. In the example […]

.NET, C#

.net, C#, csharp, dotnet

C# tip: Use Path Combine for file or directory path information

Taswar Bhatti December 4, 2013 1 Comment

.NET provides in its System.IO namespace the Path class which performs operations on String instances that contain file or directory path information. These operations are performed in a cross-platform manner. Most of the time we see develeopers writing code like

string path = somePath + "\\" + filename;

1	string path = somePath + "\\" + filename;

But by using Path.Combine we can provide a cross platform path

string somePath = @"C:\temp";
string filename = "dat.txt";
string path = Path.Combine(somePath,filename);

//produce an output of C:\temp\dat.txt
//linux: C:/temp/dat.txt

string[] paths = {@"c:\My Music", "2013", "media", "banner"};
string fullPath = Path.Combine(paths);
//output c:\My Music\2013\media\banner

string path1 = @"C:\Temp";
string path2 = "My Music";
fullPath = Path.Combine(path1, path2);

//output: C:\Temp\My Music

fullPath = Path.Combine(string.Empty, path2);
//output: My Music
	
fullPath = Path.Combine(path1, string.Empty);
//output: C:\Temp

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string somePath = @"C:\temp";

string filename = "dat.txt";

string path = Path.Combine(somePath,filename);

//produce an output of C:\temp\dat.txt

//linux: C:/temp/dat.txt

string[] paths = {@"c:\My Music", "2013", "media", "banner"};

string fullPath = Path.Combine(paths);

//output c:\My Music\2013\media\banner

string path1 = @"C:\Temp";

string path2 = "My Music";

fullPath = Path.Combine(path1, path2);

//output: C:\Temp\My Music

fullPath = Path.Combine(string.Empty, path2);

//output: My Music

fullPath = Path.Combine(path1, string.Empty);

//output: C:\Temp

By using […]

.NET, C#

.net, C#, csharp, dotnet

Documentation comment your C# code use GhostDoc at least

Taswar Bhatti December 2, 2013 No Comments

Recently have been going through some old code to review the comments in them from other developers and what I find out is developers tend to have really bad comments & documentation in their code Example:

public class Person 
{
   /// &lt;summary>
   /// Constructor
   /// &lt;/summary>
   public Person() {}
   
}

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public class Person

{

/// <summary>

/// Constructor

/// </summary>

public Person() {}

}

From the above code it is obvious that it is the constructor but does the comment tell me […]

.NET, C#, Misc

.net, C#, csharp, dotnet

IIS8 HTTP Error 500.19 – Internal Server Error

C# tip: use params for method that takes variable number of arguments

Phantomjs talk in Ottawa JS Meetup

C# tip: out parameter keyword

C# the use of ref keyword

C# tip: Use Path Combine for file or directory path information

Documentation comment your C# code use GhostDoc at least

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