什么样的替代resizableimagewithcapinsets Ios方法在C＃

Question

如何在C＃中像IOS方法那样拉伸图像 resizableimagewithcapinsets 呢？

Answer 1

我认为你需要调整图像的权利？请检查下面这段代码：

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

/// <summary> 
/// Class contaning method to resize an image and save in JPEG format 
/// </summary> 
public class ImageHandler 
{ 

public void Save(Bitmap image, int maxWidth, int maxHeight, int quality, string filePath) 
{ 
    // Get the image's original width and height 
    int originalWidth = image.Width; 
    int originalHeight = image.Height; 

    // To preserve the aspect ratio 
    float ratioX = (float)maxWidth/(float)originalWidth; 
    float ratioY = (float)maxHeight/(float)originalHeight; 
    float ratio = Math.Min(ratioX, ratioY); 

    // New width and height based on aspect ratio 
    int newWidth = (int)(originalWidth * ratio); 
    int newHeight = (int)(originalHeight * ratio); 

    // Convert other formats (including CMYK) to RGB. 
    Bitmap newImage = new Bitmap(newWidth, newHeight, PixelFormat.Format24bppRgb); 

    // Draws the image in the specified size with quality mode set to HighQuality 
    using (Graphics graphics = Graphics.FromImage(newImage)) 
    { 
     graphics.CompositingQuality = CompositingQuality.HighQuality; 
     graphics.InterpolationMode = InterpolationMode.HighQualityBicubic; 
     graphics.SmoothingMode = SmoothingMode.HighQuality; 
     graphics.DrawImage(image, 0, 0, newWidth, newHeight); 
    } 

    // Get an ImageCodecInfo object that represents the JPEG codec. 
    ImageCodecInfo imageCodecInfo = this.GetEncoderInfo(ImageFormat.Jpeg); 

    // Create an Encoder object for the Quality parameter. 
    Encoder encoder = Encoder.Quality; 

    // Create an EncoderParameters object. 
    EncoderParameters encoderParameters = new EncoderParameters(1); 

    // Save the image as a JPEG file with quality level. 
    EncoderParameter encoderParameter = new EncoderParameter(encoder, quality); 
    encoderParameters.Param[0] = encoderParameter; 
    newImage.Save(filePath, imageCodecInfo, encoderParameters); 
} 

/// <summary> 
/// Method to get encoder infor for given image format. 
/// </summary> 
/// <param name="format">Image format</param> 
/// <returns>image codec info.</returns> 
    private ImageCodecInfo GetEncoderInfo(ImageFormat format) 
    { 
     return ImageCodecInfo.GetImageDecoders().SingleOrDefault(c => c.FormatID == format.Guid); 
    } 
}