实现Asp.net mvc上传头像加剪裁功能


            在我们使用QQ上传头像，注册用户账号时是不是都会遇到上传图像，并根据自己的要求对图像进行裁剪，这是怎么实现的呐？

本文主要介绍了Asp.net mvc实现上传头像加剪裁功能，分享给大家供大家参考。具体如下： 



运行效果截图如下：



具体代码如下：

前台代码







<link href="~/Content/fineuploader.css" rel="stylesheet" />

<link href="~/Content/jquery.Jcrop.min.css" rel="stylesheet" />

<link href="~/Content/crop.min.css" rel="stylesheet" />

<script src="~/Scripts/jquery-1.8.2.min.js"></script>

<script src="~/Scripts/jquery.fineuploader-3.1.min.js"></script>

<script src="~/Scripts/jquery.Jcrop.min.js"></script>

<script src="~/Scripts/crop.js"></script>



<div id="jquery-wrapped-fine-uploader"></div>

 <div id="message"></div>

 <div id="crop_wrap">

  <div id="crop_holder">

   <div id="crop_area" class="border">

    <img id="crop_image" alt="" src="" class="preview-image" style="display: none" />

   </div>

   <div id="preview_area">

    <div id="preview_title">当前头像</div>

    <div id="preview_large_text" class="preview-text">180px × 180px</div>

    <div id="preview_large_wrap" class="border">

     <img id="preview_large" alt="" src="@ViewBag.Path" class="preview-image" style=""/></div>

   </div>

  </div>

  <div id="crop_operation" style="display: none;">

   <form id="form_crop" action="/home/index" method="post">

    <input type="hidden" name="x" id="x">

    <input type="hidden" name="y" id="y">

    <input type="hidden" name="w" id="w">

    <input type="hidden" name="h" id="h">

    <input type="hidden" name="imgsrc" id="imgsrc">

    <input id="crop_operation_submit" type="submit" value="裁切并保存" /><span id="crop_operation_msg" style="display: none" class="green"></span>

   </form>

  </div>

  <div id="croped_message" class="green"></div>

 </div>





后台代码







public ActionResult Index()

  {

   return View();

  }



  /// <summary>

  /// 保存缩略图

  /// </summary>

  /// <param name="form"></param>

  /// <returns></returns>

  [HttpPost]

  public ActionResult Index(FormCollection form)

  {

   int x = Convert.ToInt32(form["x"]);

   int y = Convert.ToInt32(form["y"]);

   int w = Convert.ToInt32(form["w"]);

   int h = Convert.ToInt32(form["h"]);

   string imgsrc = form["imgsrc"].Substring(0, form["imgsrc"].LastIndexOf("?"));

   string path = ImgHandler.CutAvatar(imgsrc, x, y, w, h);



   //保存Path

   

   ViewBag.Path = path;

   return View();

  }



  /// <summary>

  /// 上传头像

  /// </summary>

  /// <param name="qqfile"></param>

  /// <returns></returns>

  [HttpPost]

  public ActionResult ProcessUpload(string qqfile)

  {

   try

   {

    string uploadFolder = "/Upload/original/" + DateTime.Now.ToString("yyyyMM") + "/";

    string imgName = DateTime.Now.ToString("ddHHmmssff");

    string imgType = qqfile.Substring(qqfile.LastIndexOf("."));

    string uploadPath = "";

    uploadPath = Server.MapPath(uploadFolder);

    if (!Directory.Exists(uploadPath))

    {

     Directory.CreateDirectory(uploadPath);

    }

    using (var inputStream = Request.InputStream)

    {

     using (var flieStream = new FileStream(uploadPath + imgName + imgType, FileMode.Create))

     {

      inputStream.CopyTo(flieStream);

     }

    }



    return Json(new { success = true, message = uploadFolder + imgName + imgType });

   }

   catch (Exception e)

   {

    return Json(new { fail = true, message = e.Message });

   }

  }







以上就是实现Asp.net mvc上传头像加剪裁功能的部分代码，小编分享给大家参考，希望对大家的学习有所帮助。