我使用了Trx ISO 8583库。该库以HEX格式发送消息长度。但我需要发送4个字节的Ascii字符作为消息头。怎么做?
答案 0 :(得分:1)
要更改邮件标题,您应该更改NboFrameLengthSink class在Trx => Communication => Sinks => NboFrameLengthSink.cs
在代码
下更改public void Send(PipelineContext context)函数buffer.Write(true, _bytesInHeader == 2
? new[] {(byte) (length >> 8), (byte) length}
: new[] {(byte) (length >> 24), (byte) (length >> 16), (byte) (length >> 8), (byte) (length)});
到
string ls_length;
ls_length = length.ToString("####").PadLeft(4,'0');
byte[] ascii = System.Text.Encoding.ASCII.GetBytes(ls_length);
buffer.Write(true, _bytesInHeader == 2
? new[] { (byte)(length >> 8), (byte)length }
: ascii);
和
在函数public bool Receive(PipelineContext context)
代码
context.ExpectedBytes = ( header[0] << 24 ) | ( header[1] << 16 ) | ( header[2] << 8 ) | header[3];
chage to
context.ExpectedBytes = header[0] | header[1] | header[2] | header[3];
如果您需要在Ascii中发送消息,但需要将位图发送为HEX 请执行以下操作:
在 Iso8583Ascii1987.xml congif文件更改
<!-- Add first bitmap -->
<Invoke Name="Add">
<Parameter Type="BitMapFieldFormatterFactory">
<Property Name="FieldNumber" Value="0" />
<Property Name="Description" Value="Primary bitmap" />
<Property Name="Encoder" Reference="DataEncoderFactory" />
<Property Name="LowerFieldNumber" Value="1" />
<Property Name="UpperFieldNumber" Value="64" />
</Parameter>
</Invoke>
<!-- Add secondary bitmap (field number 1) -->
<Invoke Name="Add">
<Parameter Type="BitMapFieldFormatterFactory">
<Property Name="FieldNumber" Value="1" />
<Property Name="Description" Value="Secondary bitmap" />
<Property Name="Encoder" Reference="DataEncoderFactory" />
<Property Name="LowerFieldNumber" Value="65" />
<Property Name="UpperFieldNumber" Value="128" />
</Parameter>
</Invoke>