asp.net mvc上传图片案例

 1.放在ajax.BeginForm里，不好使,同asp.net 表单中 fileupload控件不支持ajax差不多吧，如果异步的话可以借助jquery.form.js，很方便

2.

  //上传文件
            object fielLogoImg = Request.Files["fielLogoImg"];
            if (fielLogoImg != null)
            {
                string fileExtension = string.Empty;
                string filename = string.Empty; ;
                string filePathName = string.Empty;
                if (Request.Files["fielLogoImg"].ContentLength > 0 && Request.Files["fielLogoImg"].ContentLength <= 51200)
                {
                    bool fileJudge = false;
                    string path = Server.MapPath(Framework.Configuration.UserFilePath + CurrentUser.UName);
                    string uploadFileName = Path.GetFileName(Request.Files["fielLogoImg"].FileName);
                    fileExtension = System.IO.Path.GetExtension(Request.Files["fielLogoImg"].FileName).ToLower();
                    filename = "Logo" + fileExtension;
                    string[] ae = { ".gif", ".bmp", ".jpg", ".jpeg", ".png", ".tif" };
                    for (int i = 0; i < ae.Length; i++)
                    {
                        if (fileExtension == ae[i])
                        {
                            fileJudge = true;
                        }
                    }
                    if (fileJudge)
                    {
                        filePathName = Path.Combine(path, filename);
                        Request.Files["fielLogoImg"].SaveAs(filePathName);
                        cvModel.LogUrl = "/../Files/Web/" + CurrentUser.UName + "/" + filename;
                    }
                    else
                    {
                        return Content("提示1：上传图片类型限制：" + ".gif|.bmp|.jpg|.jpeg|.png|.tif");
                    }
                }
                else
                {
                    return Content("提示4:图片大小不超过100kb");
                }
            }
            else
            {
                cvModel.LogUrl = "/../Files/Common/Web/Web1/Logo.png";//默认的图片；
            }