图像Resizer for ASP.NET

Question

任何人都知道ASP.net的任何好的图像调整大小API？

Answer 1

结帐System.Drawing命名空间

MSDN Documentation

Resizing Image - Stack Overflow Question

Answer 2

调整图像大小是很简单并不需要的API。我为自己写了这个任务。这里有点代码让你开始走下去。

// get original image 
System.Drawing.Image orignalImage = Image.FromFile(originalPath); 
// create a new image at the desired size 
System.Drawing.Bitmap newImage = new Bitmap(450, 338); 
// create grpahics object to draw with 
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(newImage); 
//draw the new image 
g.DrawImage(orignalImage, r); 
// save the new image  
newImage.Save(System.IO.Path.Combine(OUTPUT_FOLDER_PATH , ImageName.Replace(" ", ""))); 

Answer 3

我将提供此代替其提供的答案。 Image Magick是一个非常强大和成熟的图像处理库，您可以使用.net。我已经取得了很多成功。

http://www.imagemagick.org/script/index.php

Answer 4

下面是我用什么：

internal static System.Drawing.Image FixedSize(System.Drawing.Image imgPhoto, int Width, int Height) 
{ 
    int sourceWidth = Convert.ToInt32(imgPhoto.Width); 
    int sourceHeight = Convert.ToInt32(imgPhoto.Height); 
    int sourceX = 0; 
    int sourceY = 0; 
    int destX = 0; 
    int destY = 0; 

    float nPercent = 0; 
    float nPercentW = 0; 
    float nPercentH = 0; 

    nPercentW = ((float)Width/(float)sourceWidth); 
    nPercentH = ((float)Height/(float)sourceHeight); 
    if (nPercentH < nPercentW) 
    { 
     nPercent = nPercentH; 
     destX = System.Convert.ToInt16((Width - 
      (sourceWidth * nPercent))/2); 
    } 
    else 
    { 
     nPercent = nPercentW; 
     destY = System.Convert.ToInt16((Height - 
      (sourceHeight * nPercent))/2); 
    } 

    int destWidth = (int)(sourceWidth * nPercent); 
    int destHeight = (int)(sourceHeight * nPercent); 

    Bitmap bmPhoto = new Bitmap(Width, Height, 
     PixelFormat.Format24bppRgb); 
    bmPhoto.SetResolution(imgPhoto.HorizontalResolution, 
     imgPhoto.VerticalResolution); 

    Graphics grPhoto = Graphics.FromImage(bmPhoto); 
    grPhoto.Clear(Color.Black); 
    grPhoto.InterpolationMode = 
     InterpolationMode.HighQualityBicubic; 

    grPhoto.DrawImage(imgPhoto, 
     new Rectangle(destX, destY, destWidth, destHeight), 
     new Rectangle(sourceX, sourceY, sourceWidth, sourceHeight), 
     GraphicsUnit.Pixel); 

    grPhoto.Dispose(); 
    return bmPhoto; 
} 

用法很简单：

System.Drawing.Image orignalImage = Image.FromFile(filePath); 
System.Drawing.Image resizedImage = FixedSize(originalImage, 640, 480); 

Answer 5

的ImageResizer库正在积极开发，维护和支持（2007年起）。它是最新的性能技术和功能，并有一个简单的API。它安全，安全，可靠，为数百个商业网站提供支持。

它通过4.0 MVC与ASP.NET 2.0兼容，并设计了IIS 7

Answer 6

是非常快这是一个完整的图像缩放示例应用程序。

我已经尝试过自己，它的工作。

Sample Image Resizer
Image Resizer Class