C#图片切割、图片压缩、缩略图生成代码汇总
本文为大家整理了C#图片切割、图片压缩、缩略图生成的实现代码，大家可以收藏，方便以后使用，具体内容如下
///图片切割函数
///</summary>
///<paramname="sourceFile">原始图片文件</param>
///<paramname="xNum">在Ｘ轴上的切割数量</param>
///<paramname="yNum">在Ｙ轴上的切割数量</param>
///<paramname="quality">质量压缩比</param>
///<paramname="outputFile">输出文件名，不带后缀</param>
///<returns>成功返回true，失败则返回false</returns>
publicstaticboolimageCut(StringsourceFile,intxNum,intyNum,longquality,StringoutputFile)
{
try
{
longimageQuality=quality;
BitmapsourceImage=newBitmap(sourceFile);
ImageCodecInfomyImageCodecInfo=GetEncoderInfo("image/jpeg");
EncodermyEncoder=Encoder.Quality;
EncoderParametersmyEncoderParameters=newEncoderParameters(1);
EncoderParametermyEncoderParameter=newEncoderParameter(myEncoder,imageQuality);
myEncoderParameters.Param[0]=myEncoderParameter;
floatxWidth=sourceImage.Width/xNum;
floatyWidth=sourceImage.Height/yNum;
StringoutputImage="";
for(intcountY=0;countY<yNum;countY++)
for(intcountX=0;countX<xNum;countX++)
{
RectangleFcloneRect=newRectangleF(countX*xWidth,countY*yWidth,xWidth,yWidth);
BitmapnewImage=sourceImage.Clone(cloneRect,PixelFormat.Format24bppRgb);
outputImage=outputFile+countX+countY+".jpg";
newImage.Save(outputImage,myImageCodecInfo,myEncoderParameters);
}
returntrue;
}
catch
{
returnfalse;
}
}
#endregionimageCut
imageCompress
#region
imageCompress
/**////<summary>
///图片压缩函数
///</summary>
///<paramname="sourceFile">原始图片文件</param>
///<paramname="quality">质量压缩比</param>
///<paramname="ouputFile">输出文件名,请用.jpg后缀</param>
///<returns>成功返回true，失败则返回false</returns>
publicstaticboolimageCompress(StringsourceFile,longquality,StringoutputFile)
{
try
{
longimageQuality=quality;
BitmapsourceImage=newBitmap(sourceFile);
ImageCodecInfomyImageCodecInfo=GetEncoderInfo("image/jpeg");
EncodermyEncoder=Encoder.Quality;
EncoderParametersmyEncoderParameters=newEncoderParameters(1);
EncoderParametermyEncoderParameter=newEncoderParameter(myEncoder,imageQuality);
myEncoderParameters.Param[0]=myEncoderParameter;
sourceImage.Save(outputFile,myImageCodecInfo,myEncoderParameters);
returntrue;
}
catch
{
returnfalse;
}
}
#endregionimageCompress
getThumImage#regiongetThumImage
/**////<summary>
///生成缩略图
///</summary>
///<paramname="sourceFile">原始图片文件</param>
///<paramname="quality">质量压缩比</param>
///<paramname="multiple">收缩倍数</param>
///<paramname="outputFile">输出文件名</param>
///<returns>成功返回true,失败则返回false</returns>
publicstaticboolgetThumImage(StringsourceFile,longquality,intmultiple,StringoutputFile)
{
try
{
longimageQuality=quality;
BitmapsourceImage=newBitmap(sourceFile);
ImageCodecInfomyImageCodecInfo=GetEncoderInfo("image/jpeg");
EncodermyEncoder=Encoder.Quality;
EncoderParametersmyEncoderParameters=newEncoderParameters(1);
EncoderParametermyEncoderParameter=newEncoderParameter(myEncoder,imageQuality);
myEncoderParameters.Param[0]=myEncoderParameter;
floatxWidth=sourceImage.Width;
floatyWidth=sourceImage.Height;
BitmapnewImage=newBitmap((int)(xWidth/multiple),(int)(yWidth/multiple));
Graphicsg=Graphics.FromImage(newImage);
g.DrawImage(sourceImage,0,0,xWidth/multiple,yWidth/multiple);
g.Dispose();
newImage.Save(outputFile,myImageCodecInfo,myEncoderParameters);
returntrue;
}
catch
{
returnfalse;
}
}
#endregiongetThumImage
ImageCodecInfo#regionImageCodecInfo
/**////<summary>
///获取图片编码信息
///</summary>
privatestaticImageCodecInfoGetEncoderInfo(StringmimeType)
{
intj;
ImageCodecInfo[]encoders;
encoders=ImageCodecInfo.GetImageEncoders();
for(j=0;j<encoders.Length;++j)
{
if(encoders[j].MimeType==mimeType)
returnencoders[j];
}
returnnull;
}
以上就是本文的全部内容，希望对大家的学习有所帮助。