网上找的一段代码求高手转为C#

// 上传图片
@Action(value = "/ckUploadImage", results = { @Result(name = "success", location = "/upload.jsp") })
public String uploadImages() throws Exception {
HttpServletRequest request = ServletActionContext.getRequest();
FileOutputStream fos;
String webRoot = request.getSession().getServletContext().getRealPath(
"");
// 获取图片后缀名
String partRightType = uploadFileName.substring(uploadFileName
.lastIndexOf("."));
String CKEditorFuncNum = request.getParameter("CKEditorFuncNum");
// 判断图片的格式
if (!ImageFile.checkImageType(partRightType)) {
String path = "";
String alt_msg = "Sorry! Image format selection is incorrect, please choose GIF, jpeg, PNG format JPG, picture!";
pringWriterToPage("<script type='text/javascript'>window.parent.CKEDITOR.tools.callFunction("
+ CKEditorFuncNum
+ ", '"
+ path
+ "' , '"
+ alt_msg
+ "');</script>");
} else {
try { uploadFileName = DateUtils.getDateNoStyle() + "-"
+ UUID.randomUUID() + partRightType; String savePath = webRoot + Constants.UPLOAD_IMAGES_PATH;
File uploadFilePath = new File(savePath);
if (uploadFilePath.exists() == false) {
uploadFilePath.mkdirs();
System.out.println("路径不存在,但是已经成功创建了" + savePath);
} else {
System.out.println("路径存在了" + savePath);
}
fos = new FileOutputStream(new File(savePath + uploadFileName));
FileInputStream fis = new FileInputStream(getUpload());
byte[] buffer = new byte[1024];
int len = 0;
while ((len = fis.read(buffer)) > 0) {
fos.write(buffer, 0, len);
}
fos.close();
fis.close();
} catch (FileNotFoundException foe) {
System.out.println("上传文件为0字节");
} // String path = "http://" + request.getServerName() + ":"
// + request.getServerPort() + request.getContextPath()
// + Constants.UPLOAD_IMAGES_PATH + uploadFileName; String path = request.getContextPath()
+ Constants.UPLOAD_IMAGES_PATH + uploadFileName;
String alt_msg = "";
pringWriterToPage("<script type='text/javascript'>window.parent.CKEDITOR.tools.callFunction("
+ CKEditorFuncNum
+ ", '"
+ path
+ "' , '"
+ alt_msg
+ "');</script>"); } return null;
}