CKEditor5 上传Base64图片（非插件）- C# ASP.NET Core

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虽然官网自带 Base64 插件，但是需要使用Npm方式引用。

可使用以下方式代替：

页面代码

<!--基础引用-->
<script src="~/plugins/ckeditor5-build-decoupled-document/ckeditor.js"></script>
<script src="~/plugins/ckeditor5-build-decoupled-document/zh-cn.js"></script>
 
<!--需要额外引用ckfinder.js-->
<script src="https://ckeditor.com/apps/ckfinder/3.5.0/ckfinder.js"></script>
  
<script>
        var ckeditor;
        ckeditor = DecoupledEditor.create(document.querySelector('#editor'), {
            language: "zh-cn",
            ckfinder: { uploadUrl: '/Controller/ActionMethod' }
        }).then(editor => {
            const toolbarContainer = document.querySelector('.toolbar-container');
            toolbarContainer.prepend(editor.ui.view.toolbar.element);
            window.editor = editor;
            //editor.setData('<p>Some text.</p>');
            //const data = editor.getData();
        });
</script>

C# 后台 Controller 方法

/// <summary>
/// 将上传的图片转为Base64
/// </summary>
/// <param name="files"></param>
/// <returns></returns>
public JsonResult ArticleEmbedImg()
{
    string body = Request.Body.ToString();
    if (Request.Form.Files.Count > 0)
    {
        using (MemoryStream ms = new MemoryStream())
        {
            Request.Form.Files[0].OpenReadStream().CopyTo(ms);
            return Json(new { uploaded = "true", url = "data:image/png;base64," + Convert.ToBase64String(ms.ToArray()) });
        }
    }
    else
    {
        return Json(null);
    }
}