Multipartentity upload pictures through, asp.net server how to receive it?

Need to upload pictures, so just use multipartentity, from the Internet to look at the source of the multipartentity not know the code below

 / / upload images to the server 
public String UploadImage (String url, Map  param, File file) throws Exception {
String result = ""; 
HttpPost post = new HttpPost (url); 

MultipartEntity entity = new MultipartEntity (); 
if (param! = null &&! param.isEmpty ()) {
for (Map.Entry  entry: param.entrySet ()) {
if (entry.getValue ()! = null 
&& Entry.getValue (). Trim (). Length ()> 0) {
entity.addPart (entry.getKey (), new StringBody (entry.getValue ())); 

} 
} 
} 
/ / Add the file parameters 
if (file! = null && file.exists ()) {
entity.addPart ("file", new FileBody (file)); / / This file documents how to receive it 
} 
post.setEntity (entity); 

HttpClient httpClient = new DefaultHttpClient (); 
/ / Uploading 
HttpResponse response = httpClient.execute (post); 
/ / StringBuffer sb = new StringBuffer (); 

if (response.getStatusLine (). getStatusCode () == HttpStatus.SC_OK) {
result = retrieveInputStream (response.getEntity ()); 
Log.e ("ykp", "picture upload:" + result); 
} 

post.abort (); 
return result; 
} 

How Will the asp.net server receives the file documents? Which heroes to a code?

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