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
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<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>
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后台代码
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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 });
}
}
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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。