C#保存上传来的图片示例代码

保存上传图片的方法有很多,在接下来的文章中为大家详细介绍下使用C#是如何做到的,感兴趣的朋友不要错过
复制代码代码如下:
[HttpPost] 
public string UploadImage() 

//string ss = Request.Form["uploadFile"]; 
//return ss; 
HttpPostedFileBase uploadFile = Request.Files[0]; 
string fileName = uploadFile.FileName; 
int fileSize = uploadFile.ContentLength; 
string fileExt = Path.GetExtension(fileName).ToLower(); 
string message = ""; 
if (!(fileExt == ".png" || fileExt == ".gif" || fileExt == ".jpg" || fileExt == ".jpeg")) 

message = "图片类型只能为gif,png,jpg,jpeg"; 
return message; 

else 
{ // www.jbxue.com
if (fileSize > (int)(500 * 1024)) 

message = "图片大小不能超过500KB"; 
return message; 

else 

Random r = new Random(); 
string uploadFileName = DateTime.Now.ToString("yyyyMMddhhmmss") + r.Next(100000, 999999) + fileExt; 
try 

string directoryPath = Server.MapPath("~/UploadImages/"); 
if (!Directory.Exists(directoryPath))//不存在这个文件夹就创建这个文件夹 

Directory.CreateDirectory(Server.MapPath("~/UploadImages/")); 

uploadFile.SaveAs(Server.MapPath("~/UploadImages/") + uploadFileName); 
message = uploadFileName; 
return message; 

catch (Exception ex) 

message = ex.Message; 
return message; 



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