我使用了Trx ISO 8583库。此库以十六进制发送消息长度。但我需要发送4个字节的Ascii字符作为消息头。如何做到这一点?
若要更改消息头,应更改NboFrameLengthSink类位于Trx=>通信=>接收器=>NboFrameLengthSink.cs
代码下公共无效发送(PipelineContext上下文)函数的更改
buffer.Write(true, _bytesInHeader == 2
? new[] {(byte) (length >> 8), (byte) length}
: new[] {(byte) (length >> 24), (byte) (length >> 16), (byte) (length >> 8), (byte) (length)});
至
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
函数中的public bool Receive(PipelineContext上下文)
代码
context.ExpectedBytes = ( header[0] << 24 ) | ( header[1] << 16 ) | ( header[2] << 8 ) | header[3];
更改为
context.ExpectedBytes = header[0] | header[1] | header[2] | header[3];
如果您需要以Ascii发送消息,但位图为HEX执行以下操作:
在Iso8583Asii1987.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>