js插件Jcrop自定义截取图片功能

//剪裁头像对象和宽高比例var jcrop_api, boundx, boundy;//上传图片 //Id：上传控件Id//IsShowProgress:是否需要展示进度条//SuccessFunc: 上传成功执行的方法function UploadImg(Id, IsShowProgress, SuccessFunc,IsJcrop) { var uploadObj = $("#" + Id); var htmlstr = "<div class='upload_ShowFileProgress' id='" + Id + "-queue' " + (IsShowProgress ? "" : "style='display:none;'") + "></div>"; uploadObj.parent().append(htmlstr); var img_UploadUrl = IsJcrop ? "/Upload/UploadifyHeader" : "/Upload/UploadifyImg"; //Upload控制器中方法 uploadObj.uploadify({  //指定swf文件  'swf': '/Scripts/uploadify/uploadify.swf',//下载uploadify插件中的uploadify.swf  //后台处理的页面  'uploader': img_UploadUrl,  //进度条id  'queueID': Id + "-queue",  //进度条显示完成后是否自动消失  'removeCompleted': false,  //按钮相关  'buttonClass': 'btn_Upload',  'buttonText': '请选择图片',  'height': '31',  'width': '108',  //在浏览窗口底部的文件类型下拉菜单中显示的文本  'fileTypeDesc': 'Image Files',  //允许上传的文件后缀  'fileTypeExts': '*.gif; *.jpg; *.png; *.bmp; *.jpeg; *.svg',  //选择文件后自动上传  'auto': true,  //设置为true将允许多文件上传  'multi': false,  'onUploadSuccess': function (file, data, response) {   if (SuccessFunc != undefined && SuccessFunc != null && SuccessFunc.length > 0) {    eval(SuccessFunc + "(file,data,response)");   }  } });}//上传文件//Id：上传控件Id//IsShowProgress:是否需要展示进度条//SuccessFunc: 上传成功执行的方法function UploadFile(Id, IsShowProgress, SuccessFunc) { var uploadObj = $("#" + Id); var htmlstr = "<div class='upload_ShowFileProgress' id='" + Id + "-queue' " + (IsShowProgress ? "" : "style='display:none;'") + "></div>"; uploadObj.parent().append(htmlstr); uploadObj.uploadify({  //指定swf文件  'swf': '/Scripts/uploadify/uploadify.swf',  //后台处理的页面  'uploader': '/Upload/Uploadify',  //进度条id  'queueID': Id + "-queue",  //进度条显示完成后是否自动消失  'removeCompleted': false,  //按钮相关  'buttonClass': 'btn_Upload',  'buttonText': '请选择文件',  'height': '31',  'width': '108',  //上传文件的类型 默认为所有文件  'All Files': '*.*',  //在浏览窗口底部的文件类型下拉菜单中显示的文本  //'fileTypeDesc': 'Image Files',  //允许上传的文件后缀  'fileTypeExts': '*.*',  //选择文件后自动上传  'auto': false,  //设置为true将允许多文件上传  'multi': true,  'onUploadSuccess': function (file, data, response) {   if (SuccessFunc != undefined && SuccessFunc != null && SuccessFunc.length > 0) {    eval(SuccessFunc + "(file,data,response)");   }  } });}//设定图片function SetJcropImage(url) { $(".div_NoFileTip").hide(); $(".UploadImgContainer").show(); $("#preview_large").attr("src", url); $("#preview_large2").attr("src", url); $("#preview_large3").attr("src", url); $("#imgsrc").val(url); ErealizeJcrop(url);}//剪切图片function ErealizeJcrop(url) { var $pcnt = $('#preview_large2').parent(),  xsize = $pcnt.width(),  ysize = $pcnt.height(); $('#preview_large').Jcrop({  onChange: updatePreview,  onSelect: updatePreview,  onSelect: updateCoords,  aspectRatio: xsize / ysize }, function () {  var bounds = this.getBounds();  boundx = bounds[0];  boundy = bounds[1];  jcrop_api = this;  // $preview.appendTo(jcrop_api.ui.holder); }); //更换图片时重新加载图片 if (jcrop_api != undefined)  jcrop_api.setImage(url); function updateCoords(c) {  $('#x').val(c.x);  $('#y').val(c.y);  $('#w').val(c.w);  $('#h').val(c.h); }; function updatePreview(c) {  if (parseInt(c.w) > 0) {   var rx = xsize / c.w;   var ry = ysize / c.h;   $("#preview_large2").css({    width: Math.round(rx * boundx) + 'px',    height: Math.round(ry * boundy) + 'px',    marginLeft: '-' + Math.round(rx * c.x) + 'px',    marginTop: '-' + Math.round(ry * c.y) + 'px'   });   $pcnt = $('#preview_large3').parent(),   xsize2 = $pcnt.height();   ysize2 = $pcnt.height();   var rx2 = xsize2 / c.w;   var ry2 = ysize2 / c.h;   $("#preview_large3").css({    width: Math.round(rx2 * boundx) + 'px',    height: Math.round(ry2 * boundy) + 'px',    marginLeft: '-' + Math.round(rx2 * c.x) + 'px',    marginTop: '-' + Math.round(ry2 * c.y) + 'px'   });  } };

  #region 判断文件夹是否存在，不存在则创建，返回文件夹路径  private void CheckFileExistsCreateNew(string filepath)  {   if (!Directory.Exists(Server.MapPath(filepath)))   {    Directory.CreateDirectory(Server.MapPath(filepath));//创建文件夹   }  }  #endregion  #region 上传图片  //上传头像  [HttpPost]  public JsonResult UploadifyHeader(HttpPostedFileBase fileData)  {   if (fileData != null)   {    try    {     // 文件上传后的保存路径     string fileName = Path.GetFileName(fileData.FileName);// 原始文件名称     string fileExtension = Path.GetExtension(fileName); // 文件扩展名     string saveName =DateTime.Now.ToString("yyyyMMddHHmmssffff")+"_Y" + fileExtension; // 保存文件名称      string Url = "/Upload/" + CurrentUserInfo.Sys_RentCompany.CompanyKey + "/" + CurrentUserInfo.Comm_User.Id + "/UploadImg"; //在项目中创建一个Upload文件夹存放上传和截取的图片 CurrentUserInfo.Sys_RentCompany.CompanyKey 为session 保存的值 这里对应的文件夹的路径 自己可以定义     string ShowUrl = Url + "/" + saveName;     string filePhysicalPath = Server.MapPath(ShowUrl);     //当前登陆人文件夹     CheckFileExistsCreateNew(Url);     fileData.SaveAs(filePhysicalPath);     //压缩图片     string YsFileImg = ImgHandler.YsImg(ShowUrl, filePhysicalPath);     return Json(YsFileImg);    }    catch (Exception ex)    {     return Json(new { Success = false, Message = ex.Message }, JsonRequestBehavior.AllowGet);    }   }   else   {    return Json(new { Success = false, Message = "请选择要上传的文件！" }, JsonRequestBehavior.AllowGet);   }  }  //上传头像  [HttpPost]  public JsonResult UploadifyImg(HttpPostedFileBase fileData)  {   if (fileData != null)   {    try    {     // 文件上传后的保存路径     string fileName = Path.GetFileName(fileData.FileName);// 原始文件名称     string fileExtension = Path.GetExtension(fileName); // 文件扩展名     string saveName = DateTime.Now.ToString("yyyyMMddHHmmssffff") + "_Y" + fileExtension; // 保存文件名称      //string filed = "/Upload/" + saveName;//路经     string Url = "/Upload/" + CurrentUserInfo.Sys_RentCompany.CompanyKey + "/" + CurrentUserInfo.Comm_User.Id + "/UploadImg";     string ShowUrl = Url + "/" + saveName;     string filePhysicalPath = Server.MapPath(ShowUrl);     //当前登陆人文件夹     CheckFileExistsCreateNew(Url);     fileData.SaveAs(filePhysicalPath);     return Json(ShowUrl);    }    catch (Exception ex)    {     return Json(new { Success = false, Message = ex.Message }, JsonRequestBehavior.AllowGet);    }   }   else   {    return Json(new { Success = false, Message = "请选择要上传的文件！" }, JsonRequestBehavior.AllowGet);   }  }  //保存剪切的图片  [HttpPost]  public JsonResult JcropImg(FormCollection colls)  {   JsonFormatResult result = new JsonFormatResult { IsSuccess = true, Message = "保存成功！" };   try   {    int x = int.Parse(colls["x"]);    int y = int.Parse(colls["y"]);    int w = int.Parse(colls["w"]);    int h = int.Parse(colls["h"]);    string imgsrc = colls["imgsrc"];    string Path = ImgHandler.CutAvatar(imgsrc, x, y, w, h);    result.Data = Path;   }   catch (Exception e)   {    result.IsSuccess = false;    result.Message = e.Message;   }   return Json(result);  }   #endregion