CKEditor与dotnetcore实现图片上传

CKEditor的使用

1.引入js库

<script src="https://cdn.ckeditor.com/4.6.1/standard-all/ckeditor.js"></script>

2.定义一个textarea标签

<textarea id="editor">
 </textarea>

3.用CkEditor替换textarea即可使用基本功能

CKEDITOR.replace('editor');

4.配置CkEditor

添加图片上传，代码插入工具

CKEDITOR.replace('editor-box', {
      //GitHub地址：https://github.com/ckeditor     
      toolbar: [
        { name: 'document', items: ['Source'] },
        { name: 'basicstyles', items: ['Bold', 'Italic'] },
        { name: 'paragraph', items: ['NumberedList', 'BulletedList', '-', 'Outdent', 'Indent', '-', 'Blockquote'] },
        { name: 'links', items: ['Link', 'Unlink'] },
        { name: 'insert', items: ['Image','CodeSnippet'] },
        { name: 'styles', items: ['Format', 'Styles'] }
      ],
      filebrowserImageUploadUrl: '/Blogs/UploadImageUrl', //配置图片上传后台Url     
      customConfig: '',     
      extraPlugins: 'codesnippet,image2,uploadimage',      
      removePlugins: 'image',      
      //mathJaxLib: 'https://cdn.mathjax.org/mathjax/2.6-latest/MathJax.js?config=TeX-AMS_HTML',    
      codeSnippet_theme: 'ir_black',
      height: 450,     
      contentsCss: ['https://cdn.ckeditor.com/4.6.1/standard-all/contents.css'],     
      format_tags: 'p;h1;h2;h3;pre',     
      removeDialogTabs: 'image:advanced;link:advanced;link:target',    
      stylesSet: [
        /* Inline Styles */
        { name: 'Marker', element: 'span', attributes: { 'class': 'marker' } },
        { name: 'Cited Work', element: 'cite' },
        { name: 'Inline Quotation', element: 'q' },
        /* Object Styles */
        {
          name: 'Special Container',
          element: 'div',
          styles: {
            padding: '5px 10px',
            background: '#eee',
            border: '1px solid #ccc'
          }
        },
        {
          name: 'Compact table',
          element: 'table',
          attributes: {
            cellpadding: '5',
            cellspacing: '0',
            border: '1',
            bordercolor: '#ccc'
          },
          styles: {
            'border-collapse': 'collapse'
          }
        },
        { name: 'Borderless Table', element: 'table', styles: { 'border-style': 'hidden', 'background-color': '#E6E6FA' } },
        { name: 'Square Bulleted List', element: 'ul', styles: { 'list-style-type': 'square' } },
        /* Widget Styles */
        { name: 'Illustration', type: 'widget', widget: 'image', attributes: { 'class': 'image-illustration' } },
        { name: 'Featured snippet', type: 'widget', widget: 'codeSnippet', attributes: { 'class': 'code-featured' } },
        { name: 'Featured formula', type: 'widget', widget: 'mathjax', attributes: { 'class': 'math-featured' } }
      ]
    });

5.后台接收图片

/// <summary>
    /// 图片上传
    /// </summary>
    /// <param name="env"></param>
    /// <returns></returns>
    public async Task<IActionResult> UploadImageUrl([FromServices]IHostingEnvironment env)
    {
      // CKEditor提交的很重要的一个参数  
      string callback = Request.Query["CKEditorFuncNum"];
      var form = Request.Form;
      var img = form.Files[0]; //获取图片
      string fileName = img.FileName;
      var openReadStream = img.OpenReadStream();
      byte[] buff = new byte[openReadStream.Length];
      await openReadStream.ReadAsync(buff, 0, buff.Length);
      string filenameGuid = Guid.NewGuid().ToString();
      var bowerPath = PathUtils.GetSavePath(filenameGuid, true) + ".jpg";//获取到图片保存的路径，这边根据自己的实现
      var savePath = Path.Combine(env.WebRootPath, bowerPath);
      using (FileStream fs = new FileStream(savePath, FileMode.Create))
      {
        await fs.WriteAsync(buff, 0, buff.Length);
        //服务器返回JavaScript脚本
        string result = $"<script type=\"text/javascript\">window.parent.CKEDITOR.tools.callFunction(\"{callback}\", \"{"/"+bowerPath}\", \"\");</script>";
        Response.ContentType = "text/html;charset=UTF-8";
        return Content(result);
      }
    }

6.注意

服务器返回需要加上这个，否则会遇到前端页面不执行返回的JavaScript脚本的问题

Response.ContentType = "text/html;charset=UTF-8";

配置完成即可使用图片上传功能