c# - 使用 Telerik RadEditor 将图像转换为流并将其显示到浏览器

Question

我在我的 aspx 页面中放置了一个 radeditor 控件，并将一些内容从 microsoft word 复制到其中，其中包含图像和一些文本数据。然后我保存了数据。我标记它正在将图像转换为流。我注意到图像的字符串是这样的：

<img alt="" 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" /><br />

我复制了这个源并将其粘贴到另一个 html 文件中并在浏览器中运行它，它显示了我复制的图像。

现在，我从其他网站（浏览器）复制了一些其他文本和图像并将其粘贴到编辑器，它显示图像标签和路径。

我想要的是从浏览器复制并粘贴图像到编辑器应该像上面那样转换它，而不是它具有 src="domain/path/filename.extesion"。

可能吗？另一种解决方案是从 content() 方法中获取所有图像标签并替换其 src 属性值。但为此，我必须从 URL 获取图像，将其转换为字节或流（我不知道你们是怎么做的），使用 base 64 进行编码，然后用实际源替换它。

有人可以帮忙吗？？

谢谢...

Answer 1

我自己解决了：

为此，我HTMLAgilityPack.dll在 bin 文件夹中添加并在项目中添加了它的引用。在页面中添加了一个telerik RadEditor控件。然后创建了一个方法，该方法parseHtmlToImageSource(string html)接受 html 作为字符串并以流格式返回带有图像的修改后的字符串。单击提交按钮后，将执行以下代码，并为您提供整个 HTML 页面的内容，您可以将其存储到服务器varbinary数据类型中。

protected void submitBtn_Click(object sender, EventArgs e)
{
            try
            {
                string html = parseHtmlToImageSource(editor.Content);
                byte[] array = new GetBytes(html);
        }
            catch (Exception ex)
            {
                throw ex
            }
}

private string parseHtmlToImageSource(string html)
{
            try
            {
                string modifiedHTML = html;
                HtmlDocument doc = new HtmlDocument();
                doc.LoadHtml(html);

                var srcTags = doc.DocumentNode.SelectNodes("//img");
                if (srcTags != null)
                {
                    foreach (var item in doc.DocumentNode.SelectNodes("//img[@src]"))//select only those img that have a src attribute..ahh not required to do [@src] i guess
                    {
                        string value = item.Attributes["src"].Value.ToString();

                        if (!(value.Contains("data:image/") && value.IndexOf("base64") > 0))
                        {
                            string extension = Path.GetExtension(item.Attributes["src"].Value.ToString().ToLower());

                            if (extension.Contains("."))
                            {
                                extension = extension.Remove(extension.IndexOf("."), extension.IndexOf(".") + 1);
                            }

                            item.Attributes["src"].Value = makeImageSrcData(item.Attributes["src"].Value.ToString(), extension);

                            modifiedHTML = modifiedHTML.Replace(value, item.Attributes["src"].Value.ToString());
                        }
                    }
                }

                //doc.ToString();

                //doc.Save("yourFile");//dont forget to save

                return modifiedHTML;
            }
            catch (Exception ex)
            {
                throw ex;
            }
}


private string makeImageSrcData(string url, string extension)
{
            try
            {
                WebResponse result = null;
                WebRequest request = WebRequest.Create(url);

                // Get the content
                result = request.GetResponse();

                Stream rStream = result.GetResponseStream();
                byte[] rBytes = ReadFully(rStream);

                return "data:image/" + extension + ";base64," + Convert.ToBase64String(rBytes, Base64FormattingOptions.None);
            }
            catch (Exception ex)
            {
                throw ex;
            }
}

public static byte[] GetBytes(string str)
{
    try
        {
            byte[] bytes = new byte[str.Length * sizeof(char)];
            System.Buffer.BlockCopy(str.ToCharArray(), 0, bytes, 0, bytes.Length);
            return bytes;
    }
        catch (Exception ex)
        {
                throw ex;
        }
}

public static byte[] ReadFully(Stream input)
{
            try
            {
                byte[] buffer = new byte[16 * 1024];
                using (MemoryStream ms = new MemoryStream())
                {
                    int read;
                    while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
                    {
                        ms.Write(buffer, 0, read);
                    }
                    return ms.ToArray();
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
}

您还可以在读取数据或将其放置到编辑器时使用以下方法将字节转换为字符串：

例如 ：

protected void getData()
{
    try
        {   // Make a code to get the data from data base here and then for varbinary fild I have used "fieldName"
        string contents = (byte[])ds.Tables[0].Rows[0]["fieldName"];
        editor.Content = new GetString(excelContents);
    }
    catch (Exception ex)
        {
                throw ex;
        }
}

public static string GetString(byte[] bytes)
{
    try
        {
            char[] chars = new char[bytes.Length / sizeof(char)];
            System.Buffer.BlockCopy(bytes, 0, chars, 0, bytes.Length);
            return new string(chars);
    }
    catch (Exception ex)
        {
                throw ex;
        }
}

Answer 2

我认为这提出了同样的问题：http ://www.telerik.com/community/forums/aspnet-ajax/editor/conver-image-to-stream-how.aspx

Answer 3

开发人员的回答解决了我的问题，但作为一个临时（快速和简单）的解决方案，您可以使用 OnClientPasteHtml 来防止粘贴 base64 编码图像：

<telerik:RadEditor ID="RadEditor1" runat="server" OnClientPasteHtml="OnClientPasteHtml">
</telerik:RadEditor> 
    <script type="text/javascript">
        function OnClientPasteHtml(sender, args) {
            if (args.get_value().indexOf(";base64,") > -1) {
                args.set_cancel(true);
            }
        }
    </script>