前言： 這幾天在做一個圖片上傳的API，在網上找了很多資料，也學到了很多東西，最近剛接觸WebAPI，好多東西都看不懂。 還停留在webfrom的概念， 哈哈 其實webfrom也沒學好，廢話不多說了，先看程式碼。

public async Task<HttpResponseMessage> PostUpload(string Token, int Part)
        {
            if (Global.checkToken(Token))  //驗證口令通過
            {
                // Check whether the POST operation is MultiPart?  
                if (!Request.Content.IsMimeMultipartContent())
                {
                    throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
                }

                // Prepare CustomMultipartFormDataStreamProvider in which our multipart form  
                // data will be loaded.  
                string partFolder = string.Empty;
                switch (Part)
                {
                    case 1:
                        partFolder = "MobileUploadImages_BaoGao";
                        break;
                    case 2:
                        partFolder = "MobileUploadImages_ShenQing";
                        break;
                    case 3:
                        partFolder = "MobileUploadImages_RenWu";
                        break;
                    default:
                        partFolder = "MobileUploadImages_QiTa";
                        break;
                }
                string fileSaveLocation = HttpContext.Current.Server.MapPath("~/"+ImageUploadPublic.FoldersAddress+"/"+partFolder);
                if (!Directory.Exists(fileSaveLocation))
                    Directory.CreateDirectory(fileSaveLocation);

                CustomMultipartFormDataStreamProvider provider = new CustomMultipartFormDataStreamProvider(fileSaveLocation);
                List<string> files = new List<string>();
                try
                {
                    // Read all contents of multipart message into CustomMultipartFormDataStreamProvider.                  
                    await Request.Content.ReadAsMultipartAsync(provider);
                    string newFileName = string.Empty;
                    foreach (MultipartFileData file in provider.FileData)
                    {
                        newFileName = Path.GetFileName(file.LocalFileName);
                        files.Add(newFileName);
                    }

                    return Request.CreateResponse(HttpStatusCode.OK, files);
                }
                catch (System.Exception e)
                {
                    return Request.CreateErrorResponse(HttpStatusCode.InternalServerError, e);
                }
            }
            else
            {
                string ResCode = "0002", Msg = "口令錯誤";
                Dictionary<string, object> obj = new Dictionary<string, object>();
                obj.Add("ResCode", ResCode);
                obj.Add("Msg", Msg);
                return Request.CreateResponse(HttpStatusCode.OK, obj);
            }
        }
 

public class CustomMultipartFormDataStreamProvider : MultipartFormDataStreamProvider
    {
        public CustomMultipartFormDataStreamProvider(string path) : base(path) { }

        public override string GetLocalFileName(HttpContentHeaders headers)
        {
            //修改圖片名稱並返回
            string newFileName = string.Empty;
            newFileName = Path.GetExtension(headers.ContentDisposition.FileName.Replace("\"", string.Empty));//獲取字尾名
            newFileName = DateTime.Now.ToString("yyyyMMddHHmmss") + new Random().Next(0, 99999) + newFileName;
            return newFileName;
        }
    }
 

static void Main(string[] args)
        {
            using (var client = new HttpClient())
            using (var content = new MultipartFormDataContent())
            {
                // Make sure to change API address  
                client.BaseAddress = new Uri("http://localhost:18110/");

                // Add first file content   
                var fileContent1 = new ByteArrayContent(File.ReadAllBytes(@"C:\Users\y\Desktop\testImgUpload\wokechakandehuibao.jpg"));
                fileContent1.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
                {
                    FileName = "wokechakandehuibao.jpg"
                };

                // Add Second file content  
                var fileContent2 = new ByteArrayContent(File.ReadAllBytes(@"C:\Users\y\Desktop\testImgUpload\xiezhoubaoFasongrenyuan.jpg"));
                fileContent2.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
                {
                    FileName = "xiezhoubaoFasongrenyuan.jpg"
                };

                content.Add(fileContent1);
                content.Add(fileContent2);

                // Make a call to Web API  
                var result = client.PostAsync("/WebAppErpUser/PostUpload?Token=000000&Part=1", content).Result;
                //HttpContent hc = result.Content;
                result.Content.ReadAsStringAsync().ContinueWith((str) => { Console.WriteLine(str.Result); });//輸出上傳的圖片名稱（修改後的）

                Console.WriteLine(result.StatusCode);
                Console.ReadLine();
            }
        }
 

這一段程式碼是我在網上找的，具體在哪個網站找的我也忘了，其中添加了修改圖片名稱的功能，其他沒啥，只為複製程式碼的同學提供方便。

注：如果原創者看到了這個博文，請原諒我沒有記住你的名字，請原諒我沒有收藏你的部落格。