简单上传图片代码

using System.IO;

  public string UpdatePic(HttpPostedFileBase pic)

        {

            string filePath = null;

            string filename = null;

            try

            {

                string path = Server.MapPath("~/Upload/");

if (!Directory.Exists(path))

                {

                    Directory.CreateDirectory(path);

                }

                filename = pic.FileName;//获得文件上传全目录

                //filename = DateTime.Now.ToString("yyyyMMddHHmmssfff");

                int place = filename.LastIndexOf(".") + 1;//获得文件扩展名的位置

                string extname = filename.Substring(place).ToLower();//得到文件扩展名

                string allowedType = "jpg|bmp|jpeg|psd|png";//允许上传文件类型

                long allowedSize = 512000 * 1024;//允许上传最大文件大小

                if (allowedType.Contains(extname) && pic.ContentLength < allowedSize)

                {

                    filePath = path + filename;

                    pic.SaveAs(filePath);

                }

                else

                {

                    return null;

                }

            }

            catch (Exception err)

            {

                throw new Exception(err.Message);

            }

            return filename;

        }

    HttpPostedFileBase file = Request.Files["pic"];

if (file.ContentLength != 0)

                    {

                        string filename = UpdatePic(file);

                        model.Url = @"..\..\Upload\" + filename;

                    }

 <tr>

                <th>@Html.LabelFor(model=>model.Url)</th>

                <td>

                   <input type="file" name="pic" id="pic" />

                </td>

              </tr>

    @using (Html.BeginForm("AddActivity", "Activity", FormMethod.Post, new { enctype = "multipart/form-data"}))

简单上传图片代码