public ActionResult PLUpload(FileUploadModel model)
{
FileUploadResultModel result = new FileUploadResultModel();
result.result = true;
HttpPostedFileBase file = model.postedFile;
if (null != file && file.ContentLength > 0)
{
try
{
if (model.chunks.HasValue && model.chunk.HasValue)
{
result = ChunkSaveFile(model, result);
}
else
{
result = SaveFile(model, result);
}
}
catch (Exception ex)
{
result.result = false;
result.result_text = ex.Message;
}
}
else
{
result.result = false;
result.result_text = "无文件";
}
return(Json(result));
}
private FileUploadResultModel SaveFile(FileUploadModel model, FileUploadResultModel result)
{
Stream uploadStream = null;
FileStream fs = null;
HttpPostedFileBase postFileBase = model.postedFile;
uploadStream = postFileBase.InputStream;
result = CreateNewFileName(model, result);
string newFileFullPath = Server.MapPath(result.newFilePath) + result.newFileName;
result.oldFileName = model.name;
//文件上传，一次上传1M的数据，防止出现大文件无法上传
int bufferLen = 1024 * 1024;
byte[] buffer = new byte[bufferLen];
int contentLen = 0;
// 保存到服务器文件夹
fs = new FileStream(newFileFullPath, FileMode.Create, FileAccess.ReadWrite);
while ((contentLen = uploadStream.Read(buffer, 0, bufferLen)) != 0)
{
fs.Write(buffer, 0, contentLen);
fs.Flush();
}
fs.Close();
fs.Dispose();
//// 另外简单方式
//file.SaveAs(newFileFullPath);
return(result);
}
private FileUploadResultModel CreateNewFileName(FileUploadModel model, FileUploadResultModel result)
{
// 文件夹
var fileFolder = "/Upload/Common/";
if (!string.IsNullOrEmpty(model.folder))
{
fileFolder = model.folder;
}
// 文件路径
string fileName = Path.GetFileName(model.postedFile.FileName);
string imageBasePath = fileFolder + (string.IsNullOrWhiteSpace(ConfigurationManager.AppSettings["filePath"]) ? DateTime.Now.ToString("yyyy/MM/dd/") : DateTime.Now.ToString(ConfigurationManager.AppSettings["filePath"]));
result.newFilePath = imageBasePath;
string imagePath = Server.MapPath(imageBasePath);
if (!Directory.Exists(imagePath))
{
Directory.CreateDirectory(imagePath);
}
// 新文件名
string newFileNameBase = string.IsNullOrWhiteSpace(ConfigurationManager.AppSettings["newFileName"]) ? "yyyyMMddHHmmssfff" : ConfigurationManager.AppSettings["newFileName"];
string newFileName = DateTime.Now.ToString(newFileNameBase) + "_o_" + Path.GetExtension(fileName);
result.newFileName = newFileName;
return(result);
}
private FileUploadResultModel ChunkSaveFile(FileUploadModel model, FileUploadResultModel result)
{
Stream uploadStream = null;
FileStream fs = null;
HttpPostedFileBase postFileBase = model.postedFile;
uploadStream = postFileBase.InputStream;
FileUploadResultModel currentFileUploadInfo = result;
if (0 == model.chunk)
{// 第一次创建文件名
result = CreateNewFileName(model, result);
Session[model.fileFlag] = result;
}
else
{
currentFileUploadInfo = Session[model.fileFlag] as FileUploadResultModel;
}
currentFileUploadInfo.oldFileName = model.name;
string newFileFullPath = Server.MapPath(currentFileUploadInfo.newFilePath) + currentFileUploadInfo.newFileName;
int bufferLen = postFileBase.ContentLength;
byte[] buffer = new byte[bufferLen];
int contentLen = 0;
// 保存到服务器文件夹
fs = new FileStream(newFileFullPath, FileMode.Append, FileAccess.Write);
while ((contentLen = uploadStream.Read(buffer, 0, bufferLen)) != 0)
{
fs.Write(buffer, 0, contentLen);
fs.Flush();
}
fs.Close();
fs.Dispose();
// 最后一次重命名
if ((model.chunk.Value + 1) == model.chunks.Value)
{
FileInfo fi = new FileInfo(newFileFullPath);
var ext = Path.GetExtension(model.name);
var newName = newFileFullPath + ext;
currentFileUploadInfo.newFileName += ext;
fi.MoveTo(Path.Combine(newName));
}
return(currentFileUploadInfo);
}
