Oyyou.MonoGameTutorials/MonoGame_Tutorials/Tutorial009/Sprites/Player.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;

namespace Tutorial009.Sprites
{
  public class Player : Sprite
  {
    public Player(Texture2D texture)
      : base(texture)
    {

    }

    public override void Update(GameTime gameTime, List<Sprite> sprites)
    {
      Move();

      foreach (var sprite in sprites)
      {
        if (sprite == this)
          continue;

        if ((this.Velocity.X > 0 && this.IsTouchingLeft(sprite)) ||
            (this.Velocity.X < 0 & this.IsTouchingRight(sprite)))
          this.Velocity.X = 0;

        if ((this.Velocity.Y > 0 && this.IsTouchingTop(sprite)) ||
            (this.Velocity.Y < 0 & this.IsTouchingBottom(sprite)))
          this.Velocity.Y = 0;
      }

      Position += Velocity;

      Velocity = Vector2.Zero;
    }

    private void Move()
    {
      if (Keyboard.GetState().IsKeyDown(Input.Left))
        Velocity.X = -Speed;
      else if (Keyboard.GetState().IsKeyDown(Input.Right))
        Velocity.X = Speed;

      if (Keyboard.GetState().IsKeyDown(Input.Up))
        Velocity.Y = -Speed;
      else if (Keyboard.GetState().IsKeyDown(Input.Down))
        Velocity.Y = Speed;
    }
  }
}