Get Highres Thumbnail

public Image GetThumbnail(FileInfo from, Size size)
      {
          try
          {
              Image image = Bitmap.FromFile(from.ToString());

              int width = size.Width;
              int height = size.Height;

              if (image.Width > image.Height)
                  height = width * image.Height / image.Width;
              else
                  width = height * image.Width / image.Height;

              if (width > size.Width)
              {
                  width = size.Width;
                  height = width * image.Height / image.Width;
              }
              if (height > size.Height)
              {
                  height = size.Height;
                  width = height * image.Width / image.Height;
              }

              Image returnImage = new Bitmap(size.Width, size.Height);

              Graphics graphics = Graphics.FromImage(returnImage);
              graphics.SmoothingMode = SmoothingMode.HighQuality;
              graphics.CompositingQuality = CompositingQuality.HighQuality;
              graphics.InterpolationMode = InterpolationMode.High;

              graphics.FillRectangle(new SolidBrush(Color.White), 0, 0, returnImage.Width, returnImage.Height);

              graphics.DrawImage(image, new Rectangle((size.Width – width) / 2, (size.Height – height) / 2, width, height), new Rectangle(0, 0, image.Width, image.Height), GraphicsUnit.Pixel);

              return returnImage;
          }
          catch (Exception exception)
          {
          }

          return null;
      }

 

 

To save it, just use image.save(…); with the result

How to remove objects from generic List by property value

Having two generic lists of type List<MyClass>, how do I remove from List1 all the instances of List2, matching a property?

This is the setup. I have a class:

public class MyClass
{
    public int MyValue { get; set; }
    public int MyOtherValue { get; set; }
}

And two lists:

List<MyClass> list1 = new List<MyClass>();
list1.Add(new MyClass() { MyValue = 1, MyOtherValue = 10 });
list1.Add(new MyClass() { MyValue = 2, MyOtherValue = 20 });
list1.Add(new MyClass() { MyValue = 3, MyOtherValue = 30 });
list1.Add(new MyClass() { MyValue = 4, MyOtherValue = 40 });

List<MyClass> list2 = new List<MyClass>();
list2.Add(new MyClass() { MyValue = 2, MyOtherValue = 50 });
list2.Add(new MyClass() { MyValue = 3, MyOtherValue = 60 });

I want to remove all list2 instances from list1 matching on MyValue property.

.NET 4.0 Argument Overloading Galore

Tired of maintaining millions of manically malicious misplaced Method overloads ?

Then you must go 4.0 !

To make a simple constructor overload with and without parameters like:

public Constructor() : this( null ) { .. }

public Constructor(string str ) { .. }

Simply write:

public Constructor( string str = null ) {.. }

Much easier to read and maintain, brilliant

 

When calling constructors you historically have had to choose the less of two evils. Either call:

new Class( unknowParameter1, i, valueFromNowhere );

Which ensured that all wanted parameters where specified, but is impossible to read. Or the more readable, but less secure:

new Class(){ Name = unknownParameter, Age = i, FavoriteColor = valueFromNowhere };

Now you can have both:

new Class(Name: unknownParameter, Age: i, FavoriteColor: valueFromNowhere };

Again brilliant !

3 Groovy Shortcuts in VS

Add Using statements in Visual Studio

Instead of guessing which using statement to use, just Write the class you want, and hit Control + .(DOT). Then a menu will appear with the possible usings. When selected, the statement is automatically added to the file. 

Jump to definition

To jump to a definition ( of a class, method, attribute or what ever ) just hit F12. To go the other way, hit Shift + F12. ( This will result in a list of options )

Go to solution explorer

To move focus to the solution explorer use Ctrl + W + S.

WCF selfhosting helper

A simple wrapper for hosting wcf services that works with both service references and web references.

WcfServiceHelper.Instance.StartService<MyService, IMyService>(new ServerConf());

More can be done in terms of configuration and a StopService method is missing. That is left for the reader (or untill I need it in my app).

Selfhosting WCF on win2008

If you host a WCF service as a non-administrator user on Windows 2008 (and Vista) you may get this error even if you are member of the admin groups:

HTTP could not register URL http://+:8000/. Your process does not have access rights to this namespace (see http://go.microsoft.com/fwlink/?LinkId=70353 for details)

Solution: Log in as administrator and fire:

netsh http add urlacl url=http://+:8000/ user=DOMAIN\UserName

Rotate Zune HD screen to landscape

When developing applications for the Zune HD, you might need to be able to rotate your display to landscape mode. To achieve this easily just make a Pre and Post Draw action ( BeginDraw and EndDraw ), where you manipulate the Viewport. This way you can develop the entire program in horizotal and then rotate it afterwards.

public class LandscapeZuneGame : Game
{
   private RenderTarget2D renderTarget;
   private SpriteBatch spriteBatch;

   public LandscapeZuneGame()
   {
      new GraphicsDeviceManager(this)
      {
         PreferredBackBufferWidth = 480,
         PreferredBackBufferHeight = 272
      };

      IsMouseVisible = true;
   }

   protected override void LoadContent()
   {
      renderTarget = new RenderTarget2D(GraphicsDevice, 480, 272, 1, SurfaceFormat.Color);
      spriteBatch = new SpriteBatch(GraphicsDevice);
      base.LoadContent();
   }

   // override BeginDraw so we can set the render target and Viewport before
   // any game drawing occurs.
   protected override bool BeginDraw()
   {
      if (base.BeginDraw())
      {
         GraphicsDevice.SetRenderTarget(0, renderTarget);
         GraphicsDevice.Viewport = new Viewport
         {
            X = 0,
            Y = 0,
            Width = 480,
            Height = 272,
            MinDepth = GraphicsDevice.Viewport.MinDepth,
            MaxDepth = GraphicsDevice.Viewport.MaxDepth
         };
         return true;
      }
      return false;
   }

   // override EndDraw to handle unsetting the render target, resetting the Viewport,
   // and drawing the render target's contents to the screen
   protected override void EndDraw()
   {
      GraphicsDevice.SetRenderTarget(0, null);
      GraphicsDevice.Viewport = new Viewport
      {
         X = 0,
         Y = 0,
         Width = 272,
         Height = 480,
         MinDepth = GraphicsDevice.Viewport.MinDepth,
         MaxDepth = GraphicsDevice.Viewport.MaxDepth
      };

      GraphicsDevice.Clear(Color.Black);
      spriteBatch.Begin();
      spriteBatch.Draw(
         renderTarget.GetTexture(),
         new Vector2(136f, 240f),
         null,
         Color.White,
         MathHelper.PiOver2,
         new Vector2(240f, 136f),
         1f,
         SpriteEffects.None,
         0);

      spriteBatch.End();
      base.EndDraw();
   }
}

Thanks to Nick Gravelyn for the great and easy solution

WPF Databinding Enum with nice descriptions

I have an Enum that I want to databind to a wpf drop down box. But I want to represent the enum with some nice descriptions instead of Enum.ToString().

1) The enum with the nice descriptions: MyEnum.cs

    public enum MyEnum
    {
        [Description("Default value")] // Default value if enum is nullable and used in databinding
        DefaultValue,
        [Description("Value1 description")]
        Value1,
        [Description("Value2 description")]
        Value2
    }

Method with a variable number of parameters

When you need to create a method that handles an undefined number of parameters, one way to define it is by using an Array or list. Like this:

private void Method( string[] arguments )
{
    //...
}

This, however, have a semantic inconvenience when called:

Method( new string[] {  “a”, “b”, “c” };

To overcome this, use params before the string[] identifier, like this

private void Method( params string[] arguments )
{
    //...
}

Now you can call the Method a bit cleaner, making your code more readable:

Method(“a”, ”b”, ”c”);

mssql creating index on view

You have a fulltext index on a view. If you edit one of the tables that is in the view, Sql Server Manager will drop the index. When recreating the view you might get the error:

Cannot create index on view ‘vw_TestView’ because the view is not schema bound. (Microsoft SQL Server, Error: 1939)

Solution: You have to drop the view and recreate with schemabound

CREATE VIEW [dbo].[T_IC_USERS_1] WITH SCHEMABINDING
AS
SELECT U.APP_ID,U.CREATED_BY,U.CREATED_TIME,U.LOWERED_USER_NAME
  FROM   dbo.T_IC_USERS AS U
  WHERE  (IS_DELETED = '0')
GO