fix: 图片加入"data:image/" 用来判断。扩展一下。

11.图片转储API/ImgSave/.vs/config/applicationhost.config

-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="UTF-8"?>
@@ -162,7 +162,7 @@
             </site>
             <site name="ImgSave" id="2">
                 <application path="/" applicationPool="Clr4IntegratedAppPool">
-                    <virtualDirectory path="/" physicalPath="c:\users\admin\documents\visual studio 2015\Projects\ImgSave\ImgSave" />
+                    <virtualDirectory path="/" physicalPath="D:\smallproject\11.图片转储API\ImgSave\ImgSave" />
                 </application>
                 <bindings>
                     <binding protocol="http" bindingInformation="*:6146:localhost" />

11.图片转储API/ImgSave/ImgSave/Controllers/ImgSaveController.cs

-using ImgSave.Models;
+using ImgSave.Models;
@@ -24,20 +24,28 @@ namespace ImgSave.Controllers
 
                 if (null != data.i && null != data.f)
                 {
-                    byte[] base64 = Convert.FromBase64String(data.i);//获取图片base64 
+                    
+                    var imageBase64 = data.i;
+
+                    //加1个判断，扩展
+                    if (imageBase64.StartsWith("data:image/"))
+                    {
+                        imageBase64 = imageBase64.Split(',')[1];
+                    } 
+
+                    byte[] base64 = Convert.FromBase64String(imageBase64);//获取图片base64 
                     string Config = ConfigurationManager.AppSettings["DefaultDirectory"].ToString();
 
-                    //如果不存在就创建文件夹 
-                    int lastindex = data.f.LastIndexOf('\\');
-                    string Dir = Config + "\\" + data.f.Substring(0, lastindex);
-                    if (!Directory.Exists(Dir))
+                    //这个可以用工具类简化通用问题
+                    string filePath = Path.Combine(Config, data.f); 
+                    FileInfo file = new FileInfo(filePath);
+                     
+                    if (!Directory.Exists(file.DirectoryName))
                     {
-                        Directory.CreateDirectory(Dir);
+                        Directory.CreateDirectory(file.DirectoryName);
                     }
-
-                    //根据路径判断文件是否存在 
-                    string path = Config + "\\" + data.f;
-                    if (File.Exists(path) && !data.c)
+                     
+                    if (File.Exists(file.FullName) && !data.c)
                     {
 
                         //存在，且不覆盖 
@@ -49,7 +57,7 @@ namespace ImgSave.Controllers
                     }
                     else
                     {
-                        File.WriteAllBytes(path, base64); //保存图片到服务器  
+                        File.WriteAllBytes(file.FullName, base64); //保存图片到服务器  
 
                         rmodel.s = true;
                         rmodel.c = 200;