串口读取正常,但分配的字符串有垃圾,C#
我正在尝试从串行端口分割传入数据,并用后续数据更新文本框。我首先看看是否可以对“$”进行拆分,以及拆分后的下一个单词是否是“GPGGA”。如果是,我想从这句话中提取数据,其中“,”用作分隔符。 现在,如您所见,我首先更新串行端口读取的所有数据,这很好。显示包含“GPGGA”行的完整句子。但在我拆分它之后,包含“GPGGA”的句子部分看起来像“GPGGA,1\0\0\0\0…”,而之前刚刚更新到文本框的句子是“GPGGA,160333,,,,,,…”。我绝对肯定在这个句子中GPGGA后面有一个值,但是当我试图在调试模式下查看它时,字符串“ser_data”以及随后的子字符串都显示相同的垃圾。因此,我想要更新的最后一个文本框最终必然只显示1 谁能告诉我为什么会发生这种情况,以及我如何纠正它。我的论文工作急需它 谢谢, 布雷特 附言:我在下面附上了代码串口读取正常,但分配的字符串有垃圾,C#,c#,textbox,gps,serial-port,C#,Textbox,Gps,Serial Port,我正在尝试从串行端口分割传入数据,并用后续数据更新文本框。我首先看看是否可以对“$”进行拆分,以及拆分后的下一个单词是否是“GPGGA”。如果是,我想从这句话中提取数据,其中“,”用作分隔符。 现在,如您所见,我首先更新串行端口读取的所有数据,这很好。显示包含“GPGGA”行的完整句子。但在我拆分它之后,包含“GPGGA”的句子部分看起来像“GPGGA,1\0\0\0\0…”,而之前刚刚更新到文本框的句子是“GPGGA,160333,,,,,,…”。我绝对肯定在这个句子中GPGGA后面有一个值,
private void serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
byte[] bData = null;
bData = new byte[40];
serialPort.Read(bData, 0, 40);
string ser_data = System.Text.Encoding.GetEncoding("utf-8").GetString(bData);
txtAck.Invoke(new UpdateTextCallback(this.UpdateTextAck), new object[] { ser_data });
string[] str = null;
str = new string[40];
string[] str_ack = null;
str = ser_data.Split('$');
if (str.Length > 1)
{
for (int i = 1; i < str.Length; i++)
{
string temp1 = null;
temp1 = str[i];
if (temp1.StartsWith("GPGGA"))
{
string[] temp2 = null;
temp2 = temp1.Split(',');
StreamWriter objWriter = new System.IO.StreamWriter(@"D:\Server.txt", true);
if (temp2.Length > 1)
{
string Time_GPS = temp2[1];
txtEasting.Invoke(new UpdateTextCallback(this.UpdateTextEast), new object[] { Time_GPS });
string text = "Time : " + Time_GPS;
// StreamWriter objWriter = new System.IO.StreamWriter(@"D:\Server.txt", true);
objWriter.WriteLine(text);
}
if (temp2.Length > 2)
{
string Lat = temp2[2];
txtLatitude.Invoke(new UpdateTextCallback(this.UpdateTextLat), new object[] { Lat });
string text = " Latitude : " + Lat;
// StreamWriter objWriter = new System.IO.StreamWriter(@"D:\Server.txt", true);
objWriter.WriteLine(text);
}
if (temp2.Length > 4)
{
string Long = temp2[4];
txtLongitude.Invoke(new UpdateTextCallback(this.UpdateTextLong), new object[] { Long });
string text = " Longitude : " + Long;
// StreamWriter objWriter = new System.IO.StreamWriter(@"D:\Server.txt", true);
objWriter.WriteLine(text);
}
if (temp2.Length > 9)
{
string Alt = temp2[9];
txtNorthing.Invoke(new UpdateTextCallback(this.UpdateTextNorth), new object[] { Alt });
string text = " Altitude : " + Alt;
// StreamWriter objWriter = new System.IO.StreamWriter(@"D:\Server.txt", true);
objWriter.WriteLine(text);
}
string Text = "." + '\n';
objWriter.WriteLine(Text);
objWriter.Close();
temp2 = null;
flag_status = 0;
}
temp1 = null;
}
}
str = null;
private void serialPort\u DataReceived(对象发送方,SerialDataReceivedEventArgs e)
{
字节[]bData=null;
bData=新字节[40];
serialPort.Read(bData,0,40);
string ser_data=System.Text.Encoding.GetEncoding(“utf-8”).GetString(bData);
Invoke(newupdatetextcallback(this.UpdateTextAck),新对象[]{ser_data});
字符串[]str=null;
str=新字符串[40];
字符串[]str_ack=null;
str=seru data.Split(“$”);
如果(str.Length>1)
{
对于(int i=1;i1)
{
字符串时间_GPS=temp2[1];
Invoke(newupdatetextcallback(this.updatetextast),新对象[]{Time\u GPS});
string text=“时间:”+Time\u GPS;
//StreamWriter objWriter=new System.IO.StreamWriter(@“D:\Server.txt”,true);
objWriter.WriteLine(文本);
}
如果(temp2.Length>2)
{
字符串Lat=temp2[2];
Invoke(newupdatetextcallback(this.UpdateTextLat),新对象[]{Lat});
string text=“纬度:”+Lat;
//StreamWriter objWriter=new System.IO.StreamWriter(@“D:\Server.txt”,true);
objWriter.WriteLine(文本);
}
如果(temp2.Length>4)
{
字符串长度=temp2[4];
Invoke(newupdatetextcallback(this.UpdateTextLong),新对象[]{Long});
string text=“经度:”+长;
//StreamWriter objWriter=new System.IO.StreamWriter(@“D:\Server.txt”,true);
objWriter.WriteLine(文本);
}
如果(temp2.Length>9)
{
字符串Alt=temp2[9];
Invoke(新的UpdateTextCallback(this.UpdateTextNorth),新对象[]{Alt});
string text=“高度:”+Alt;
//StreamWriter objWriter=new System.IO.StreamWriter(@“D:\Server.txt”,true);
objWriter.WriteLine(文本);
}
字符串Text=“.”“+”\n';
objWriter.WriteLine(文本);
objWriter.Close();
temp2=null;
flag_status=0;
}
temp1=null;
}
}
str=null;
SerialPort.Read不一定能读取您要求的字符数
您需要保存返回值,即读取的字符数
// nBytesRead will be between 0 and 40, depending on how many bytes were waiting.
int nBytesRead = serialPort.Read(bData, 0, 40);
// Only decode the number of bytes actually retrieved.
string ser_data = System.Text.Encoding.GetEncoding("utf-8").GetString(bData, 0, nBytesRead);
SerialPort.Read不一定读取您要求的字符数 您需要保存返回值,即读取的字符数
// nBytesRead will be between 0 and 40, depending on how many bytes were waiting.
int nBytesRead = serialPort.Read(bData, 0, 40);
// Only decode the number of bytes actually retrieved.
string ser_data = System.Text.Encoding.GetEncoding("utf-8").GetString(bData, 0, nBytesRead);
修复并主要清理。这假设两件事:您的编码实际上是UTF-8,并且您的行以换行符结尾
private void serialPort_DataReceived(object sender, SerialDataReceivedEventArgs e)
{
serialPort.Encoding = ASCIIEncoding.UTF8;
string ser_data = serialPort.ReadLine();
txtAck.Invoke(new UpdateTextCallback(this.UpdateTextAck), new object[] { ser_data });
string[] str = ser_data.Split(new char[] { '$' }, 2);
if (str.Length > 1)
{
for (int i = 1; i < str.Length; i++)
{
string temp1 = str[i];
if (temp1.StartsWith("GPGGA"))
{
StreamWriter objWriter = new StreamWriter(@"D:\Server.txt", true);
try
{
string[] temp2 = temp1.Split(',');
if (temp2.Length > 1)
{
string Time_GPS = temp2[1];
txtEasting.Invoke(new UpdateTextCallback(this.UpdateTextEast), new object[] { Time_GPS });
string text = "Time : " + Time_GPS;
// StreamWriter objWriter = new System.IO.StreamWriter(@"D:\Server.txt", true);
objWriter.WriteLine(text);
}
if (temp2.Length > 2)
{
string Lat = temp2[2];
txtLatitude.Invoke(new UpdateTextCallback(this.UpdateTextLat), new object[] { Lat });
string text = " Latitude : " + Lat;
// StreamWriter objWriter = new System.IO.StreamWriter(@"D:\Server.txt", true);
objWriter.WriteLine(text);
}
if (temp2.Length > 4)
{
string Long = temp2[4];
txtLongitude.Invoke(new UpdateTextCallback(this.UpdateTextLong), new object[] { Long });
string text = " Longitude : " + Long;
// StreamWriter objWriter = new System.IO.StreamWriter(@"D:\Server.txt", true);
objWriter.WriteLine(text);
}
if (temp2.Length > 9)
{
string Alt = temp2[9];
txtNorthing.Invoke(new UpdateTextCallback(this.UpdateTextNorth), new object[] { Alt });
string text = " Altitude : " + Alt;
// StreamWriter objWriter = new System.IO.StreamWriter(@"D:\Server.txt", true);
objWriter.WriteLine(text);
}
objWriter.WriteLine(".\n");
}
finally
{
objWriter.Close();
}
flag_status = 0;
}
}
}
}
private void serialPort\u DataReceived(对象发送方,SerialDataReceivedEventArgs e)
{
serialPort.Encoding=ascienceoding.UTF8;
字符串ser_data=serialPort.ReadLine();
Invoke(newupdatetextcallback(this.UpdateTextAck),新对象[]{ser_data});
string[]str=ser_data.Split(新字符[]{'$'},2);
如果(str.Length>1)
{
对于(int i=1;i1)
{
字符串时间_GPS=temp2[1];
Invoke(newupdatetextcallback(this.updatetextast),新对象[]{Time\u GPS});
string text=“时间:”+Time\u GPS;
//StreamWriter objWriter=new System.IO.StreamWriter(@“D:\Server.txt”,true);
objWriter.WriteLine(文本);
}
如果(temp2.Length>2)
{
弦板条