在C＃中保存为JPEG从MemoryStream的 [英] Saving as jpeg from memorystream in c#

问题描述

我有一个方法如下图所示，以图像保存为JPEG格式。
我要救都具有相同的高度和宽度，没有它越来越扭曲的图片。

我怎样才能做到这一点？
请帮忙

 公共无效SaveFileOnDisk（MemoryStream的MS，字符串文件名）
 {
试
 {
串APPPATH = HttpContext.Current.Request.ApplicationPath; 
串physicalPath = HttpContext.Current.Request.MapPath（APPPATH）; 
串strPath的= physicalPath +\\Images 
字符串工作目录= strPath的; 
 
 
为System.Drawing.Image imgSave = System.Drawing.Image.FromStream（毫秒）; 
位图bmSave =新位图（imgSave）; 
位图bmTemp =新位图（bmSave）; 
 
图形grSave = Graphics.FromImage（bmTemp）; 
 grSave.DrawImage（imgSave，0，0，imgSave.Width，imgSave.Height）; 
 
 bmTemp.Save（工作目录+\\+文件名+.JPG）; 
 
 
 imgSave.Dispose（）; 
 bmSave.Dispose（）; 
 bmTemp.Dispose（）; 
 grSave.Dispose（）; 
} 
赶上（异常前）
 {
 //lblMsg.Text =请稍后再试。 
} 
 
} 
  

解决方案

调整图像并保存

 私人无效ResizeImage（图片IMG，双了maxWidth，双了maxHeight）
 {
双击srcWidth = img.Source.Width; 
双srcHeight = img.Source.Height; 
 
双resizeWidth = srcWidth; 
双resizeHeight = srcHeight; 
 
双方面= resizeWidth / resizeHeight; 
 
如果（resizeWidth>了maxWidth）
 {
 resizeWidth =了maxWidth; 
 resizeHeight = resizeWidth /方面; 
} 
如果（resizeHeight>了maxHeight）
 {
 =方面resizeWidth / resizeHeight; 
 resizeHeight =了maxHeight; 
 resizeWidth = resizeHeight *方面; 
} 
 
 img.Width = resizeWidth; 
 img.Height = resizeHeight; 
} 
  

您可以使用此代码来调整图像到所需博维保存前

I have a method as shown below to save image as jpeg. I want to save all the pictures with the same height and width without it getting distorted.

How can I do that? Please help

public void SaveFileOnDisk(MemoryStream ms, string FileName)
{
    try
    {
        string appPath = HttpContext.Current.Request.ApplicationPath;
        string physicalPath = HttpContext.Current.Request.MapPath(appPath);
        string strpath = physicalPath + "\\Images";
        string WorkingDirectory = strpath;


        System.Drawing.Image imgSave = System.Drawing.Image.FromStream(ms);
        Bitmap bmSave = new Bitmap(imgSave);
        Bitmap bmTemp = new Bitmap(bmSave);

        Graphics grSave = Graphics.FromImage(bmTemp);
        grSave.DrawImage(imgSave, 0, 0, imgSave.Width, imgSave.Height);

        bmTemp.Save(WorkingDirectory + "\\" + FileName + ".jpg");


        imgSave.Dispose();
        bmSave.Dispose();
        bmTemp.Dispose();
        grSave.Dispose();
    }
    catch (Exception ex)
    {
        //lblMsg.Text = "Please try again later.";
    }

}

解决方案

Resize the Image and Save it

Private void ResizeImage(Image img, double maxWidth, double maxHeight)
{
    double srcWidth = img.Source.Width;
    double srcHeight = img.Source.Height;

    double resizeWidth = srcWidth;
    double resizeHeight = srcHeight;

    double aspect = resizeWidth / resizeHeight;

    if (resizeWidth > maxWidth)
    {
        resizeWidth = maxWidth;
        resizeHeight = resizeWidth / aspect;
    }
    if (resizeHeight > maxHeight)
    {
        aspect = resizeWidth / resizeHeight;
        resizeHeight = maxHeight;
        resizeWidth = resizeHeight * aspect;
    }

    img.Width = resizeWidth;
    img.Height = resizeHeight;
}

You could use this code to Resize the image to the required Dimention Before saving it

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