C# 在C中编码图片到字节[]

我正在运行一个xml请求以获取Quickbooks POS中的商品图片，它返回以下响应：

string response = <?xml version="1.0" encoding="windows-1252"?>
<QBPOSXML>
    <QBPOSXMLMsgsRs>
        <ItemInventoryPicturesQueryRs requestID="912873739" statusCode="0" statusMessage="Status OK" statusSeverity="Info">
            <ItemInventoryPicturesRet>
                <ListID>5523943659390533889</ListID>
                <ItemInventoryPicture>
                    <EncodedPicture>/9j/4AAQSkZJRgABAgEAAAAAAAD...</EncodedPicture>
                    <PictureName></PictureName>
                </ItemInventoryPicture>
            </ItemInventoryPicturesRet>
        </ItemInventoryPicturesQueryRs>
    </QBPOSXMLMsgsRs>
</QBPOSXML>

这是上图的base64

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我怀疑很少有JPEG文件也是可打印的ASCII文本

EncodedPicture的内容更可能是数据的base64表示形式，这一点在问题底部的文本中得到了证实

因此，假设您已经将EncodedPicture元素的值提取为字符串，您只需要Convert.FromBase64String：

---

我怀疑很少有JPEG文件也是可打印的ASCII文本

EncodedPicture的内容更可能是数据的base64表示形式，这一点在问题底部的文本中得到了证实

因此，假设您已经将EncodedPicture元素的值提取为字符串，您只需要Convert.FromBase64String：

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Define根本不起作用，您是否收到任何错误？问题中的代码不起作用，因为没有base64解码，您必须将此base64图像转换为所需的jpg格式问题中是否确实需要完整的base64字符串？Define根本不起作用，您是否有任何错误？问题中的代码无法工作，因为没有base64解码，您必须将此base64图像转换为所需的jpg格式问题中是否真的需要完整的base64字符串？作为一名前ANSI艺术家，我反对：-@Trey:仅限您，我把第一句话说得更具体了：作为一名前ANSI艺术家，我反对这样做：-@Trey：为了你，我把第一句话说得更具体了：

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File.WriteAllBytes(@"C:\Temp\image.jpg", Convert.FromBase64String(imagecodes));