Hope its works
http://www.codeproject.com/useritems/tungAnimation.asp
http://www.codeproject.com/dotnet/NGif.asp
http://www.codeproject.com/useritems/tungAnimation.asp
http://www.codeproject.com/dotnet/NGif.asp
解决方案 »
- 请教图片分辨率问题
- C#进程问题
- C# 中axMediaPlayer怎么用呀
- mvp与mvc是一个东西么?
- 移动局部透明label的闪烁问题
- 打开窗体的同时,执行某个空间的单击事件
- vs.net2008里,空格和TAB被突出显示。如何取消?
- VS 2005 openfiledialog打开文件后关闭子窗体问题 谢谢
- 在线等:关于Access数据库计算的问题.
- 请问一个问题,我用vs.net 写的程序,如何使用csc进行编译?
- 在vs2005中为什么在创建window Application时,没有Main()的执行代码,而vs2003则自动生成,而且也没有MenuMain主菜单?
- 分布式系统中数据如何上传汇总?
一个核心是bmp的
另一个只有图片结构
都用不上啊 55555
EncoderParameters parameters1 = new EncoderParameters();
long[] numArray1 = new long[] { (long)100 };//100是保存图片的质量,1-100
parameters1.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, numArray1);
FileInfo fi = new FileInfo(FilePaths);
ImageCodecInfo info1 = this.GetEncoderInfo(fi.Extension);//获取图片对象的
newimg.Save("File Save Path",info1,parameters1);
newimg.Dispose();public ImageCodecInfo GetEncoderInfo(string strExt)
{
StringBuilder sbExt = new StringBuilder();
sbExt.Append(@"*");
sbExt.AppendFormat(strExt.ToLower());
ImageCodecInfo[] infoArray1 = ImageCodecInfo.GetImageEncoders();
for (int num1 = 0; num1 < infoArray1.Length; num1++)
{
string[] strs = infoArray1[num1].FilenameExtension.Split(';');
foreach(string str in strs)
{
if(str.ToLower() == sbExt.ToString())
{
return infoArray1[num1];
}
}
}
return null;
} 大致代码如上...请自行调试
/// <summary>
/// 获取图像编码解码器的所有相关信息
/// </summary>
/// <param name="mimeType">包含编码解码器的多用途网际邮件扩充协议 (MIME) 类型的字符串</param>
/// <returns>返回图像编码解码器的所有相关信息</returns>
static ImageCodecInfo GetCodecInfo(string mimeType)
{
ImageCodecInfo[] CodecInfo = ImageCodecInfo.GetImageEncoders();
foreach(ImageCodecInfo ici in CodecInfo)
{
if(ici.MimeType == mimeType)return ici;
}
return null;
}
/// <summary>
/// 检测扩展名的有效性
/// </summary>
/// <param name="sExt">文件名扩展名</param>
/// <returns>如果扩展名有效,返回true,否则返回false.</returns>
bool CheckValidExt(string sExt)
{
bool flag=false;
string[] aExt = AllowExt.Split('|');
foreach(string filetype in aExt)
{
if(filetype.ToLower()==sExt)
{
flag = true;
break;
}
}
return flag;
}
/// <summary>
/// 保存图片
/// </summary>
/// <param name="image">Image 对象</param>
/// <param name="savePath">保存路径</param>
/// <param name="ici">指定格式的编解码参数</param>
void SaveImage(System.Drawing.Image image,string savePath,ImageCodecInfo ici)
{
//设置 原图片 对象的 EncoderParameters 对象
EncoderParameters parameters = new EncoderParameters(1);
parameters.Param[0] = new EncoderParameter(Encoder.Quality, ((long) 90));
image.Save(savePath, ici, parameters);
parameters.Dispose();
}
/// <summary>
/// 生成缩略图
/// </summary>
/// <param name="sourceImagePath">原图片路径(相对路径)</param>
/// <param name="thumbnailImagePath">生成的缩略图路径,如果为空则保存为原图片路径(相对路径)</param>
/// <param name="thumbnailImageWidth">缩略图的宽度(高度与按源图片比例自动生成)</param>
public void ToThumbnailImages(string sourceImagePath,string thumbnailImagePath,int thumbnailImageWidth)
{
string SourceImagePath = sourceImagePath;
string ThumbnailImagePath = thumbnailImagePath;
int ThumbnailImageWidth = thumbnailImageWidth;
string sExt = SourceImagePath.Substring(SourceImagePath.LastIndexOf(".")).ToLower();
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;
//计算图片的比例
if ((((double) width) / ((double) height)) >= 1.3333333333333333f)
{
num = ((height * ThumbnailImageWidth) / width);
}
else
{
ThumbnailImageWidth = ((width * num) / height);
}
if ((ThumbnailImageWidth < 1) || (num < 1))
{
return;
}
//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);
//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));
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:ThumbnailImagePath);
SaveImage(bitmap,HttpContext.Current.Server.MapPath(savepath),GetCodecInfo((string)htmimes[sExt]));
}
catch(System.Exception e)
{
throw e;
}
finally
{
bitmap.Dispose();
graphics.Dispose();
}
}
#endregion
而且失真很严重 服了
我再次验证过:
png:
该图片1604*1894 665kb
使用88的压缩
无失真,大小385kb
原1461*855 681k png
新1461*855 741k png
long[] numArray1 = new long[] { (long)50};
gif 没反应
Dim ImgZl As Integer = 88
Dim ICI As System.Drawing.Imaging.ImageCodecInfo = System.Drawing.Imaging.ImageCodecInfo.GetImageEncoders(1)
Dim EP As System.Drawing.Imaging.EncoderParameters = New System.Drawing.Imaging.EncoderParameters(1)
EP.Param(0) = New System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Quality, ImgZl)
'压缩图片为指定的MIIE格式GetEncoderInfo("image/jpeg")
'GetEncoderInfo("image/jpeg")=System.Drawing.Imaging.ImageCodecInfo.GetImageEncoders(1)
Function GetEncoderInfo(ByVal mimeType As String) As System.Drawing.Imaging.ImageCodecInfo
Dim i As Integer
Dim encoders As System.Drawing.Imaging.ImageCodecInfo()
encoders = System.Drawing.Imaging.ImageCodecInfo.GetImageEncoders()
For i = 0 To encoders.Length - 1
If encoders(i).MimeType = mimeType Then
Return encoders(i)
End If
Next
End Function