c# - 使用来自 IClientMessageInspector 的 BeforeSendRequest 注入新的 xml

Question

我想使用from 的BeforeSendRequest方法“注入”自定义 XML 文本IClientMessageInspector。这是我尝试过的代码：

public object BeforeSendRequest(ref Message request, IClientChannel channel)
{       
    String myXML = "somexmlcontent";
    XmlDocument doc = new XmlDocument();
    doc.LoadXml(myXML);
    var ms = new MemoryStream();
    XmlDictionaryWriter writer = XmlDictionaryWriter.CreateTextWriter(ms);
    doc.WriteTo(writer);
    writer.Flush();
    ms.Position = 0;
    XmlDictionaryReader reader = XmlDictionaryReader.CreateTextReader(ms, XmlDictionaryReaderQuotas.Max);
    Message newReply = Message.CreateMessage(reader, int.MaxValue, request.Version);
    request = newReply;

    return null;
}

但它确实返回了错误“无法识别的消息版本”。

Answer 1

在操作之前制作消息副本：

MessageBuffer buffer = request.CreateBufferedCopy(Int32.MaxValue);
request = buffer.CreateMessage();
Message message = buffer.CreateMessage();

然后根据您的 xml 创建新消息：

request = Message.CreateMessage(reader, int.MaxValue, message.Version);

您还可以从原始请求对象创建新的按摩设置版本：

Message newReply = Message.CreateMessage(reader, int.MaxValue, request.Version);
request = newReply;

希望能帮助到你