asp.net產生縮圖，打浮水印得類

 

asp.net產生縮圖，打浮水印得類，代碼如下：

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;

namespace BLL
{
public class ImageUtil
    {
public static void addWatermarkImage(Graphics picture, string WaterMarkPicPath, string _watermarkPosition, int _width, int _height)
        {
            Image image = new Bitmap(WaterMarkPicPath);
int x = 0;
int y = 0;
int width = image.Width;
int height = image.Height;
string str = _watermarkPosition;
if (str != null)
            {
if (!(str == "WM_TOP_LEFT"))
                {
if (str == "WM_TOP_RIGHT")
                    {
                        x = (_width - width) - 10;
                        y = 10;
                    }
else if (str == "WM_BOTTOM_RIGHT")
                    {
                        x = (_width - width) - 10;
                        y = (_height - height) - 10;
                    }
else if (str == "WM_BOTTOM_LEFT")
                    {
                        x = 10;
                        y = (_height - height) - 10;
                    }
else if (str == "WM_BOTTOM_MIDDLE")
                    {
                        x = (_width / 2) - (width / 2);
                        y = (_height - height) - 10;
                    }
else if (str == "WM_TOP_MIDDLE")
                    {
                        x = (_width / 2) - (width / 2);
                        y = 10;
                    }
                }
else
                {
                    x = 10;
                    y = 10;
                }
            }
            picture.DrawImage(image, x, y, width, height);
            image.Dispose();
        }

public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
        {
string str;
            Image image = Image.FromFile(originalImagePath);
int num = width;
int num2 = height;
int x = 0;
int y = 0;
int num5 = image.Width;
int num6 = image.Height;
if (((str = mode) != null) && (str != "HW"))
            {
if (!(str == "W"))
                {
if (str == "H")
                    {
                        num = (image.Width * height) / image.Height;
                    }
else if (str == "Cut")
                    {
if ((((double)image.Width) / ((double)image.Height)) > (((double)num) / ((double)num2)))
                        {
                            num6 = image.Height;
                            num5 = (image.Height * num) / num2;
                            y = 0;
                            x = (image.Width - num5) / 2;
                        }
else
                        {
                            num5 = image.Width;
                            num6 = (image.Width * height) / num;
                            x = 0;
                            y = (image.Height - num6) / 2;
                        }
                    }
                }
else
                {
                    num2 = (image.Height * width) / image.Width;
                }
            }
            Image image2 = new Bitmap(num, num2);
            Graphics graphics = Graphics.FromImage(image2);
            graphics.InterpolationMode = InterpolationMode.High;
            graphics.SmoothingMode = SmoothingMode.HighQuality;
            graphics.Clear(Color.Transparent);
            graphics.DrawImage(image, new Rectangle(0, 0, num, num2), new Rectangle(x, y, num5, num6), GraphicsUnit.Pixel);
try
            {
                image2.Save(thumbnailPath, ImageFormat.Jpeg);
            }
catch (Exception exception)
            {
throw exception;
            }
finally
            {
                image.Dispose();
                image2.Dispose();
                graphics.Dispose();
            }
        }
    }

}