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。