Question

我尝试将一个base64字符串输出到一个图像，然后使用一个实际的解决方法 - 让我们说 - 不是很优雅。

我从服务器接收TCP流并将其编码为UTF-8。数据包含base64 / png字符串。收到后，我将通过删除服务器回复标题和换行来清理收到的邮件。现在我要将字符串转换为字节，以便将其发送到临时的MemoryStream，用于在最后一步生成图像。

它的代码如下所示：

    private void button1_Click(object sender, EventArgs e)
    {
        //Request the image from server
        Networker.send("THUMBNAIL RETRIEVE AMB\r\n");

        //Receive the reply from server in UTF-8 and store in string
        string received = Networker.receive();

        //clean the string by removing not needed information
        string cleanreceived = received.Replace("201 THUMBNAIL RETRIEVE OK\r\n", "");
        cleanreceived = cleanreceived.Replace("\n", "");
        cleanreceived = cleanreceived.Replace("\r", "");

        //convert string to byte[]
        byte[] imageBytes = Convert.FromBase64String(cleanreceived);

        // Convert byte[] to image and display in a pictureBox
        using (var ms = new MemoryStream(imageBytes, 0, imageBytes.Length))
        {
            Image image = Image.FromStream(ms, true);
            pictureBox1.Image = image;
        }

    }

然而，这让我失败了，Convert.FromBase64String的输入是无效的Base64字符串序列。我只是想，问题是，我将流编码为UTF-8，但后来我尝试了以下内容：

    private void button1_Click(object sender, EventArgs e)
    {
        //Request the image from server
        Networker.send("THUMBNAIL RETRIEVE AMB\r\n");

        //Receive the reply from server in UTF-8 and store in string
        string received = Networker.receive();

        //clean the string by removing not needed information
        string cleanreceived = received.Replace("201 THUMBNAIL RETRIEVE OK\r\n", "");
        cleanreceived = cleanreceived.Replace("\n", "");
        cleanreceived = cleanreceived.Replace("\r", "");

        //store the clean text in a richTextBox
        richTextBox1.Text = cleanreceived;

        //store the text of the richTextBox in a new string
        string base64 = richTextBox1.Text;

        //convert string to byte[]
        byte[] imageBytes = Convert.FromBase64String(base64);

        // Convert byte[] to image and display in a pictureBox
        using (var ms = new MemoryStream(imageBytes, 0, imageBytes.Length))
        {
            Image image = Image.FromStream(ms, false);
            pictureBox1.Image = image;
        }

    }

而且..它有效。所以我所做的是将字符串发送到文本框，然后将其调用回新字符串。使用该字符串，我可以从Base64转换为字节，依此类推。

但是，有没有办法让这项工作更轻松，更优雅，而不需要那个文本框？

在此先感谢并亲切问候，托比亚斯

.NET C＃将UTF-8 / base64字符串转换为图像

0 个答案: