public partial class Form1 : Form
{
void SplitImage(string filepath, int colum, int row)
{
Image image;
try
{
image = Image.FromFile(filepath);
}
catch
{
MessageBox.Show("これは画像ファイルではありません", "エラー", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
System.IO.FileInfo info = new System.IO.FileInfo(filepath);
string folderPath = info.DirectoryName;
string outputFolderPath = folderPath + "\\output";
if(!System.IO.Directory.Exists(outputFolderPath))
System.IO.Directory.CreateDirectory(outputFolderPath);
string fileName = info.Name;
string extension = info.Extension;
int a = fileName.LastIndexOf(".");
string filename;
if(a != -1)
{
// 拡張子を除くファイルの名前を取得する
filename = fileName.Substring(0, a);
}
else
{
filename = fileName;
}
int width = image.Width;
int height = image.Height;
int width1 = width / colum;
int height1 = height / row;
for(int x = 0; x < colum; x++)
{
for(int y = 0; y < row; y++)
{
Bitmap bmp = new Bitmap(width1, height1);
Graphics g = Graphics.FromImage(bmp);
g.DrawImage(image, new Rectangle(0, 0, width1, height1), new Rectangle(width1*x, height1*y, width1, height1), GraphicsUnit.Pixel);
g.Dispose();
string outputFilePath = String.Format("{0}\\{1}_X{2}_Y{3}{4}", outputFolderPath, filename, x, y, extension);
bmp.Save(outputFilePath);
bmp.Dispose();
}
}
image.Dispose();
}
}
