请问在C#中怎么设置一个图片按照指定的大小显示阿？

Question

this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;

Answer 1

System.Drawing.Image img;
img = new System.Drawing.Image.FromFile(文件名);
img.Hight = xx;
img.Width = xx;pictureBox1.Image = img;

Answer 2

楼上的方法好象不行吧
无法对属性或索引器“System.Drawing.Image.Width”赋值 -- 它是只读的

Answer 3

try:         Image img=Image.FromFile(@"g:\图片\ffx203.jpg");
Bitmap bmp=new Bitmap(img,150,150);
bmp.Save(@"c:\123.jpg")

Answer 4

楼主：
读一下MSDN下关于picturebox类的说明比什么都强!

Answer 5

this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
System.Drawing.Image img;
img = new System.Drawing.Image.FromFile(文件名);
img.Hight = xx;
img.Width = xx;pictureBox1.Image = img;

Answer 6

我做了个函数：
//*****************生成固定大小的缩略图***********************
public string ToThumbnailImages(string nCompRootUrl,string sourceImagePath,int thumbnailImageWidth,int thumbnailImageHeight)
{
htmimes[".gif"]="image/gif";
htmimes[".jpe"]="image/jpeg";
htmimes[".jpeg"]="image/jpeg";
htmimes[".jpg"]="image/jpeg";
htmimes[".png"]="image/png";
htmimes[".tif"]="image/tiff";
htmimes[".tiff"]="image/tiff";
htmimes[".bmp"]="image/bmp";

string SourceImagePath = sourceImagePath;
int ThumbnailImageWidth = thumbnailImageWidth;
int ThumbnailImageHeight=thumbnailImageHeight;
string sExt = SourceImagePath.Substring(SourceImagePath.LastIndexOf(".")).ToLower();
string sSourceImageName = SourceImagePath.Substring(0,SourceImagePath.LastIndexOf(".")).ToLower();
string sThumbnailImagePath=sSourceImageName+"_little"+sExt;
if(SourceImagePath.ToString()==System.String.Empty) throw new NullReferenceException("SourceImagePath is null!");
if(!CheckValidExt(sExt))
{
throw new ArgumentException("原图片文件格式不正确,支持的格式有[ "+ AllowExt +" ]","SourceImagePath");
}
//从 原图片 创建 Image 对象
System.Drawing.Image image = System.Drawing.Image.FromFile(HttpContext.Current.Server.MapPath(SourceImagePath));
int num = ((ThumbnailImageWidth / 4) * 3);
int width = image.Width;
int height = image.Height;
//用指定的大小和格式初始化 Bitmap 类的新实例
//Bitmap bitmap = new Bitmap(ThumbnailImageWidth, num, PixelFormat.Format32bppArgb);
Bitmap bitmap = new Bitmap(image,ThumbnailImageWidth,ThumbnailImageHeight);
//从指定的 Image 对象创建新 Graphics 对象
Graphics graphics = Graphics.FromImage(bitmap);
//清除整个绘图面并以透明背景色填充
graphics.Clear(Color.Transparent);
//在指定位置并且按指定大小绘制 原图片 对象
//graphics.DrawImage(image, new Rectangle(0, 0, ThumbnailImageWidth, num));
graphics.DrawImage(image, new Rectangle(0,0,ThumbnailImageWidth,ThumbnailImageHeight));
image.Dispose();
try
{
//将此 原图片 以指定格式并用指定的编解码参数保存到指定文件
//string savepath = (ThumbnailImagePath==null?SourceImagePath:sThumbnailImagePath);
string savepath = sThumbnailImagePath;
SaveImage(bitmap,HttpContext.Current.Server.MapPath(savepath),GetCodecInfo((string)htmimes[sExt]));
return savepath.ToString();

}
catch(System.Exception e)
{
throw e;
}
finally
{
bitmap.Dispose();
graphics.Dispose();
}
}

Answer 7

void ThumbnailResize(string str_file, Size new_size)
   {
      Image src_image = Image.FromFile(str_file);
      Image dst_image = src_image.GetThumbnailImage(new_size.Width, 
         new_size.Height, null, System.IntPtr.Zero);
      dst_image.Save("tn-" + str_file, 
         System.Drawing.Imaging.ImageFormat.Jpeg);
      dst_image.Dispose();
      src_image.Dispose();
   }   ThumbnailResize("aikido.jpg", new Size(655, 480));