Web Api upload image, resolve upload picture unformatted

When making this function, found a lot of information, but forget the address, so do not put together a connection,

Go directly to the code!

1. First create a new controller to upload

　　　　

<summary>

Upload

</summary>

[Routeprefix ("Api/upload")]

public class Uploadcontroller:apicontroller

2. There is a controller, must have a place to accept

<summary>
Upload image
</summary>
<returns></returns>
<exception cref= "System.Web.Http.HttpResponseException" ></exception>
[HttpPost, Route ("Image")]
Public async task

3. Important code, expand (rewrite) the Multipartformdatastreamprovider class yourself

We implement Multipartformdatastreamprovider to override the filename of File which

would be stored on server, or else the default name would be is of the the format like body-

Part_{guid}. In the following implementation we simply get the FileName from

Contentdisposition Header of the Request Body.

public class Custommultipartformdatastreamprovider:multipartformdatastreamprovider

{

<summary>

User number is prefixed by production user picture

<para> If the user is 01,01-12345467878</para>

</summary>

public string UserId {get; set;}

<summary>

Picture name

</summary>

public string ImageName {get; set;}

<summary>

Initializes a new instance of the <see cref= "Custommultipartformdatastreamprovider"/> class.

</summary>

<param name= "userId" >the user identifier.</param>

<param name= "ImageName" ></param>

<param name= "path" >the path.</param>

Public Custommultipartformdatastreamprovider (String userId, String imageName, String path)

: Base (Path)

{

This. UserID = userid;

This. ImageName = ImageName;

}

<summary>

Gets the local file name, which is combined with the root path used to create the absolute file name that stores the contents of the current MIME body part.

</summary>

<param name= "Headers" > the header of the current MIME body part. </param>

<returns>

The relative file name of the path part is not included.

</returns>

public override string Getlocalfilename (Httpcontentheaders headers)

{

Name of the saved picture

var serverimagename = "";

if (!string. IsNullOrEmpty (Serverimagename))

{

Serverimagename = this. ImageName;

}

Else

{

Get file name when new

Serverimagename = headers. ContentDisposition.FileName.Replace ("\" ", String.) Empty);

Use. Split

Take the last picture type

var Splitarr = Serverimagename.split ('. ');

var nowtime = DateTime.Now.ToString ("YyyyMMdd");

Serverimagename = this. UserId + "-" + Nowtime + "." + Splitarr.lastordefault ();

}

return serverimagename;

}

}

4. All the source code in the class is below:

Using system;using system.collections.generic;using system.io;using system.linq;using System.Net;using System.net.http;using system.net.http.headers;using system.threading.tasks;using System.Web;using System.Web.Http; namespace payu_file.controllers{///<summary>///upload//</summary>[routeprefix ("Api/upload")]public Class uploadcontroller:apicontroller{///<summary>///upload images///</summary>///<returns></returns >///<exception cref= "System.Web.Http.HttpResponseException" ></exception>[httppost, Route ("Image") ]public Async task
　　
Web Api upload image, resolve upload picture unformatted