WebApi FormData+文件长传 异步+同步实现

// POST api/values
public async Task Post()
{
try
{
// 检查该请求是否含有multipart/form-data
if (!Request.Content.IsMimeMultipartContent())
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
// 方法一
System.Web.HttpFileCollection file = System.Web.HttpContext.Current.Request.Files;
if (file.Count > 0)
{
//文件名
string name = file[0].FileName;
//保存文件
string path = HttpContext.Current.Server.MapPath("~/") + name;
file[0].SaveAs(path);
}

Dictionary<string, string> dicFormData = new Dictionary<string, string>();
foreach (var key in System.Web.HttpContext.Current.Request.Form.AllKeys)
{
//接收FormData
dicFormData.Add(key, System.Web.HttpContext.Current.Request.Form[key]);
}

// 方法二
Dictionary<string, string> dic = new Dictionary<string, string>();
string root = HttpContext.Current.Server.MapPath("~/App_Data");//指定要将文件存入的服务器物理位置
var provider = new MultipartFormDataStreamProvider(root);
// Read the form data.
await Request.Content.ReadAsMultipartAsync(provider);

// This illustrates how to get the file names.
foreach (MultipartFileData file1 in provider.FileData)
{//接收文件
Trace.WriteLine(file1.Headers.ContentDisposition.FileName);//获取上传文件实际的文件名
Trace.WriteLine("Server file path: " + file1.LocalFileName);//获取上传文件在服务上默认的文件名
}
foreach (var key in provider.FormData.AllKeys)
{//接收FormData
dic.Add(key, provider.FormData[key]);
}
}
catch (Exception ex)
{
throw ex;
}
}