/// <summary> /// 文件生成方式 /// </summary> public class UpFileMessage {
/// <summary> /// 文件名 /// </summary> public string OriginalFileName {
get;
set;
}
/// <summary> /// 是否保存略缩图 /// </summary> public bool IsImage {
get;
set;
}
/// <summary> /// 文件流 /// </summary> public Stream FileStream {
get;
set;
}
/// <summary> /// 生成缩略图的方式 /// [WH]-指定宽高 /// [H]-指定高，按比例缩放宽 /// [W]-指定宽，按比例缩放高 /// </summary> public string Mode {
get;
set;
}
/// <summary> /// 略缩图高度 /// </summary> public int? ThumbHeight {
get;
set;
}
/// <summary> /// 略缩图宽度 /// </summary> public int? ThumbWidth {
get;
set;
}
}

/// <summary> /// 文件上传返回结果 /// </summary> public class UpFileResultMessage {
/// <summary> /// 文件保存是否成功 /// </summary> public bool IsSuccess {
get;
set;
}
/// <summary> /// 错误消息 /// </summary> public string Message {
get;
set;
}
/// <summary> /// 原始文件名-（无扩展名） /// </summary> public string FileName {
get;
set;
}
/// <summary> /// 文件名扩展名 /// </summary> public string FileSuffix {
get;
set;
}
/// <summary> /// 文件名保存路径 /// </summary> public string FilePath {
get;
set;
}
/// <summary> /// 文件类型为图片时 /// 缩略图保存路径 /// </summary> public string ThumbPath {
get;
set;
}
/// <summary> /// 保存文件名（无扩展名） /// </summary> public string SaveFileName {
get;
set;
}
/// <summary> /// 文件自增ID /// </summary> public int[] FileIdArray {
get;
set;
}
}

public class FileUtil : System.Web.UI.Page {
/// <summary> /// 图片上传 /// </summary> /// <param name="fileMessage">文件生成方式</param> /// <returns></returns> public UpFileResultMessage UpLoadFile(UpFileMessage fileMessage) {
try {
string now = DateTime.Today.ToString("yyyyMMdd");
string guid = Guid.NewGuid().ToString();
//获取文件扩展名 var fileSuffix = Path.GetExtension(fileMessage.OriginalFileName);
var uploadFolder = Path.Combine(System.Web.HttpContext.Current.Server.MapPath(ParmsConfig.UpFilePathUrl), now);
if (!Directory.Exists(uploadFolder)) {
Directory.CreateDirectory(uploadFolder);
}
//保存文件名 string saveFileName = guid + fileSuffix;
string filePath = Path.Combine(uploadFolder, saveFileName);
UpFileResultMessage upFileResult = new UpFileResultMessage() {
IsSuccess = true, FileName = Path.GetFileNameWithoutExtension(fileMessage.OriginalFileName), FileSuffix = fileSuffix, FilePath = string.Format(@"{
0}
/{
1}
", ParmsConfig.UpFileIPAddressUrl, now), SaveFileName = guid }
;
using (Stream sourceStream = fileMessage.FileStream) {
using (FileStream targetStream = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None)) {
const int bufferLen = 1024 * 4;
//4KB byte[] buffer = new byte[bufferLen];
int count = 0;
while ((count = sourceStream.Read(buffer, 0, bufferLen)) > 0) {
targetStream.Write(buffer, 0, count);
}
}
//上传文件为图片时,需创建缩略图 if (fileMessage.IsImage) {
var uploadThumbFolder = Path.Combine(uploadFolder, "Thumb");
if (!Directory.Exists(uploadThumbFolder)) {
Directory.CreateDirectory(uploadThumbFolder);
}
using (FileStream targetStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.None)) {
System.Drawing.Image image = System.Drawing.Image.FromStream(targetStream);
int width = image.Width;
int height = image.Height;
int thumbWidth = 0;
int thumbHeight = 0;
switch (fileMessage.Mode) {
case "WH": //指定高宽缩放（可能变形） thumbWidth = fileMessage.ThumbWidth.HasValue ? fileMessage.ThumbWidth.Value : 200;
thumbHeight = fileMessage.ThumbHeight.HasValue ? fileMessage.ThumbHeight.Value : 200;
break;
case "W": //指定宽，高按比例 thumbWidth = fileMessage.ThumbWidth.HasValue ? fileMessage.ThumbWidth.Value : 200;
thumbHeight = height * thumbWidth / width;
break;
case "H": //指定高，宽按比例 thumbHeight = fileMessage.ThumbHeight.HasValue ? fileMessage.ThumbHeight.Value : 200;
thumbWidth = width * thumbHeight / height;
break;
default: thumbWidth = fileMessage.ThumbWidth.HasValue ? fileMessage.ThumbWidth.Value : 200;
thumbHeight = height * thumbWidth / width;
break;
}
string thumbFilePath = Path.Combine(uploadThumbFolder, saveFileName);
CreateThumbnail(thumbFilePath, targetStream, thumbWidth, thumbHeight);
upFileResult.ThumbPath = string.Format(@"{
0}
/{
1}
/Thumb", ParmsConfig.UpFileIPAddressUrl, now);
}
}
}
return upFileResult;
}
catch (Exception ex) {
return new UpFileResultMessage() {
IsSuccess = false, Message = ex.Message }
;
}
}
/// <summary> /// 创建指定图片文件流的缩略图 /// </summary> /// <param name="thumbFilePath">缩略图文件保存路径</param> /// <param name="fileStream">原始文件流</param> /// <param name="width">缩略图宽</param> /// <param name="height">缩略图高</param> private void CreateThumbnail(string thumbFilePath, Stream fileStream, int width, int height) {
using (Image image = Image.FromStream(fileStream)) {
using (Image thumbnail = image.GetThumbnailImage(width, height, null, IntPtr.Zero)) {
thumbnail.Save(thumbFilePath);
}
}
}
}

var upFileMsg = new UpFileMessage() {
IsImage = true, OriginalFileName = platformImg[i].FileName, FileStream = platformImg[i].InputStream, ThumbWidth = ThumbWidth, Mode = "W" }
;
var upFileResultMsg = new FileUtil().UpLoadFile(upFileMsg);