MVC4.0异步加载文件

来源：互联网发布：glpi windows 编辑：程序博客网时间：2024/06/06 18:00

异步上传头像

前台：

js:
function previewImage() {
        $("#oldimghead").hide();
        $("#imghead").show();
        $("#FileForm").ajaxSubmit({
            success: function (url) {
                ImageUrl = "/FileServer/UserPhoto" + url;
                if (url != "" && url != null) {
                    $("#imghead").attr("src", ImageUrl);
                }
                else
                    $("#imghead").attr("src", "~/Content/images/HeadPortraitMan.jpg");
            },
            error: function (error) { alert(error); },
            url: '/Member/UploadPhoto', /*设置post提交到的页面*/
            type: "post", /*设置表单以post方法提交*/
            dataType: "json" /*设置返回值类型为文本*/
        });
    }

后台：
//上传头像
        public ActionResult UploadPhoto()
        {
            // var LoginModel = Session["UserLogin"] != null ? Session["UserLogin"] as LoginModel : null;
            // int CusACCPInfoID = LoginModel.CusACCPInfo_ID;//客户联系人ID
            int CusACCPInfoID = 20;
            HttpPostedFileBase hp = Request.Files["file"];
            string uploadPath = Server.MapPath("/FileServer/UserPhoto");
            var msg = UploadHelper.UploadImage(CusACCPInfoID, 1, hp, uploadPath);
            return Json(msg, JsonRequestBehavior.AllowGet);
        }
服务器存储：
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;

namespace WMJQ.Common
{
   public static class UploadHelper
    {
       /// <summary>
       /// 图片上传
       /// </summary>
       /// <param name="CustomID">客户个性ID</param>
       /// <param name="CConactID">客户联系人个性ID</param>
       /// <param name="hp">图片资源</param>
       /// <param name="uploadPath">Base路径</param>
       /// <returns></returns>
       public static string UploadImage(int CustomID, int CConactID, HttpPostedFileBase hp, string uploadPath)
       {
           //定义错误消息
           string msg = "";

           if (hp == null)
           {
               msg = "请选择文件.";
           }
           //获取文件名
           string fileName = DateTime.Now.ToString("yyyyMMddHHmmssms") + System.IO.Path.GetExtension(hp.FileName); ;
           //获取文件大小
           long contentLength = hp.ContentLength;
           //文件不能大于1M
           if (contentLength > 1024 * 1024 * 2)
           {
               msg = "文件大小超过限制要求.";
           }
           if (!checkFileExtension(hp.FileName))
           {
               msg = "文件为不可上传的类型.";
           }
           //保存文件的物理路径
           string saveFilePath = "/" + CustomID + "/" + CConactID ;
           string saveFile = uploadPath + saveFilePath + "/" + fileName;
           Directory.CreateDirectory(uploadPath + saveFilePath);
           try
           {
               //保存文件
               hp.SaveAs(saveFile);
               msg = saveFilePath + "/" + fileName;
           }
           catch
           {
               msg = "上传失败.";
           }
           return msg;

}

       /// <summary>
       /// 检查文件后缀名是否符合要求
       /// </summary>
       /// <param name="fileName"></param>
       /// <returns></returns>
       private static bool checkFileExtension(string fileName)
       {
           //获取文件后缀
           string fileExtension = System.IO.Path.GetExtension(fileName);
           if (fileExtension != null)
               fileExtension = fileExtension.ToLower();
           else
               return false;

if (fileExtension != ".jpeg" && fileExtension != ".gif" && fileExtension != ".png" && fileExtension != ".jpg")
return false;

           return true;
       }
    }
}

0 0