这是 IBM amqmdnet.dll 中的一个全球化错误。在客户端strmqtrc.exe
(
00001F21 11:48:00.351013 7104.1 : Exception received
System.FormatException
Message: Input string was not in a correct format.
StackTrace:
at System.Number.ParseSingle(String value, NumberStyles options, NumberFormatInfo numfmt)
at System.Convert.ToSingle(String value)
at IBM.WMQ.MQMarshalMessageForGet.GetValueAsObject(String dt, String propValue)
at IBM.WMQ.MQMarshalMessageForGet.ProcessAllAvailableRFHs()
00001F22 11:48:00.351115 7104.1 : We are not sucessful in parsing one of theRFH2Header.Raise the RFH_FORMAT exception and breakfurther processing in loop
00001F23 11:48:00.351825 7104.1 : MQException CompCode: 2 Reason: 2421
MQMarshalMessageForGet
使用.NET Reflector进行反编译显示:
private object GetValueAsObject(string dt, string propValue)
{
...
switch (dt)
{
...
case "r4":
return Convert.ToSingle(propValue);
case "r8":
return Convert.ToDouble(propValue);
...
}
...
}
消息是在当前系统的文化中读取的,而不是在传输预期的文化中(在所有平台上都应该相同)!重现问题的简单测试:
[Test]
public void PutAndGetMessageWithFloatProperty() {
using (MQQueue queue = _queueManager.AccessQueue(TestQueue, MQC.MQOO_OUTPUT | MQC.MQOO_INPUT_AS_Q_DEF))
{
Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US");
MQMessage message = new MQMessage();
message.SetFloatProperty("TEST_SINGLE", 14.879f);
message.WriteString("some string");
message.Format = MQC.MQFMT_STRING;
queue.Put(message); // Writes property value as 14.879
Thread.CurrentThread.CurrentCulture = new CultureInfo("cs-CZ");
MQMessage readMessage = new MQMessage();
queue.Get(readMessage); // Throws MQException because 14,879 is correct format
queue.Close();
}
}
解决方法
我正在使用这个简单的范围类:
public class CultureForThreadScope : IDisposable {
private readonly CultureInfo oldCulture;
public CultureForThreadScope(CultureInfo culture) {
oldCulture = Thread.CurrentThread.CurrentCulture;
Thread.CurrentThread.CurrentCulture = culture;
}
public void Dispose() {
Thread.CurrentThread.CurrentCulture = oldCulture;
}
}
我正在包装Get
对范围的每个调用。
using (new CultureForThreadScope(CultureInfo.InvariantCulture)) {
destination.Get(message, getOptions);
}