asp.net mvc 图片裁剪上传

项目中使用上传图片的地方非常多，有时间需要客户端先裁剪好图片在上传，这里实现这个功能

图片裁剪插件：cropper.js

前端：layui

后台：asp.net mvc webapi

主要是前端代码，后台就是提供一个上传的api接口

html:

@{
    ViewBag.Title = "MKAdmin管理系统";
    Layout = "/Views/Shared/_Layout.cshtml";
}

@section Styles {
    @Styles.Render(PageCssFilesConfig.FileCropIndex)
}
    <div class="layui-input-inline layui-btn-container file-crop-btn">
        <button class="layui-btn layui-btn-primary" id="el_fileCropUpload">上传图片</button>
    </div>
    <div>
        <img id="imgFileCropPreview" class="file-crop-img-prerview" src="~/Images/cropDefault.jpg" alt="" />
    </div>
@section Scripts {
    @Scripts.Render(PageJsFilesConfig.FileCropIndex)
}

js:

//图片裁剪上传
layui.use(['jquery', 'croppers'], function () {
    var $ = layui.jquery,
        croppers = layui.croppers;

    //裁剪上传
    croppers.render({
        elem: '#el_fileCropUpload'
        , mark: 1 / 1    //裁剪比例(宽高比例)
        , url: "/home/UploadFile"  //
        , data: {
            uploadfile_ant: 'Crop'
        }
        , done: function (json) { //上传完毕回调
            //alert(JSON.stringify(json));
            var data = JSON.parse(json);
            console.log(data);
            $("#imgFileCropPreview").attr('src', data.data.url);
        }
    });
});

上传接口：

/// <summary>
/// 上传文件处理
/// </summary>
/// <param name="file"></param>
/// <returns></returns>
[HttpPost]
public ContentResult UploadFile()
{
    HttpFileCollectionBase files = HttpContext.Request.Files;
    Result<UploadFileModel> model = new Result<UploadFileModel>();
    if (files != null && files.Count > 0)
    {
        HttpPostedFileBase uploadFileData = files[0];

        model.status = false;
        if (Request.Form["uploadfile_ant"] == null)
        {
            model.msg = "请设置参数：ant, 参照web.config中 FileKit->Catalog->Key的值！";
            return Content(Newtonsoft.Json.JsonConvert.SerializeObject(model));
        }
        string key = Request.Form["uploadfile_ant"].ToString();
        var catalogConfig = FileCatalogHelper.Catalog[key];

        model.data = new UploadFileModel();
        model.data.originalName = uploadFileData.FileName;
        string extenName = Path.GetExtension(model.data.originalName);
        if (catalogConfig.FileTypeLimit.ToUpper().IndexOf(extenName.ToUpper()) < 0)
        {
            model.msg = string.Format("请上传文件格式：{0} ！", catalogConfig.FileTypeLimit);
            return Content(Newtonsoft.Json.JsonConvert.SerializeObject(model));
        }

        int fileSizeMax = int.Parse(catalogConfig.FileSize) * 1024 * 1024;
        model.data.fileSize = uploadFileData.ContentLength;
        if (model.data.fileSize > fileSizeMax)
        {
            model.msg = string.Format("上传文件必须小于等于 {0}MB", catalogConfig.FileSize);
            return Content(Newtonsoft.Json.JsonConvert.SerializeObject(model));
        }

        model.data.catalog = [email protected]"/{DateTime.Now.ToString("yyyyMM")}/{DateTime.Now.ToString("yyyyMMdd")}";
        string filePath = [email protected]"{catalogConfig.TempFile.AbsolutePath}{model.data.catalog.Replace("/", "\\")}";
        if (!Directory.Exists(filePath))
            Directory.CreateDirectory(filePath);

        string guid = Guid.NewGuid().ToString("N");
        model.data.fileName = string.Format("{0}{1}", guid, extenName);
        filePath = Path.Combine(filePath, model.data.fileName);
        uploadFileData.SaveAs(filePath);
        model.data.url = string.Format("{0}/{1}/{2}", catalogConfig.TempFile.RelativePath
            , model.data.catalog, model.data.fileName);

        model.status = true;
        model.msg = "成功！";
    }
    else
    {
        model.msg = "请选择文件";
    }
       return Content(Newtonsoft.Json.JsonConvert.SerializeObject(model));
}

前端裁剪图片代码基本都封装好了，所有这里直接调用

效果图

在线预览：http://www.mkadmin.cn/