C#使用UDP传输浮点型数据

港控/mmm° 2022-11-21 15:29 166阅读 0赞

之前一直使用UDP协议传输整形数据,直接使用byte数组传递就可以了。今天想传递double型的数据，在网上查了好久，发现需要解决的根本问题并不是如何通过UDP传输什么类型的数据，而是如何将double型无精度损失的存入byte数组中。

流程：

1、使用函数“BitConverter.GetBytes”将double型数据转为byte数组，BitConvert:将基础数据类型与字节数组相互转换。相关资料可查看：[c\# 使用BitConverter][c_ _BitConverter]

2、将最终组成的待下发数组(byte类型)直接使用UDP传输。

网上关于如何通过UDP传输的代码示例很多，这里就不再描述。以下源码仅实现了double类型数据组帧和解析的过程：

private void button1_Click(object sender, EventArgs e)
            {
                byte[] dataByte = new byte[120];
                int count = 0;
                //将double型数据存入databyte中。
                double data1 = 123.125;
                byte[] buf = BitConverter.GetBytes((double)data1);
                transport(ref dataByte, buf,ref count, 8);
    
                data1 = 432.563;
                buf = BitConverter.GetBytes((double)data1);
                transport(ref dataByte, buf, ref count, 8);
    
                data1 = 0xffffffff;
                buf = BitConverter.GetBytes((uint)data1);
                transport(ref dataByte, buf, ref count, 4);
    
                //解析dataByte数据并显示
                double b = tansitionToDouble(dataByte, 0, 8);
                listBox1.Items.Add("b:" + b);
                b = tansitionToDouble(dataByte, 8, 8);
                listBox1.Items.Add("b1:" + b);
                b = tansitionToUInt32(dataByte, 16, 4);
                listBox1.Items.Add("b2:" + Convert.ToUInt32(b));
                
            }
    
       /// <summary>
            /// 组帧
            /// </summary>
            /// <param name="dataByte"></param>
            /// 目标数组
            /// <param name="buf"></param>
            /// 源数组
            /// <param name="count"></param>
            /// 起始下标
            /// <param name="num"></param>
            /// 传入字节总数
            private void transport(ref byte[] dataByte, byte[] buf,ref int count,int num)
            {
                if(buf.Length < num)
                    return;
                if (count + num > dataByte.Length)
                    return;
                for (int i = 0; i < num; i++)
                {
                    dataByte[count++] = buf[i];
                }
            }
            /// <summary>
            /// 将数组转为double
            /// </summary>
            /// <param name="databyte"></param>
            /// 源数组
            /// <param name="startIndex"></param>
            /// 起始下标
            /// <param name="num"></param>
            /// 转换总字节数
            /// <returns></returns>
            private double tansitionToDouble(byte[] databyte,int startIndex,int num)
            {
                double data = -1;
                if (databyte.Length < startIndex + num)
                    return data;
                byte[] buf = new byte[num];
                for (int i = 0; i < num; i++)
                {
                    buf[i] = databyte[startIndex + i];
                }
                data = BitConverter.ToDouble(buf, 0);
    
                return data;
            }
    
            /// <summary>
            /// 将数组转为uint32
            /// </summary>
            /// <param name="databyte"></param>
            /// 源数组
            /// <param name="startIndex"></param>
            /// 起始下标
            /// <param name="num"></param>
            /// 转换总字节数
            /// <returns></returns>
            private double tansitionToUInt32(byte[] databyte, int startIndex, int num)
            {
                UInt32 data = 0;
                if (databyte.Length < startIndex + num)
                    return data;
                byte[] buf = new byte[num];
                for (int i = 0; i < num; i++)
                {
                    buf[i] = databyte[startIndex + i];
                }
                data = BitConverter.ToUInt32(buf, 0);
    
                return data;
            }

运行结果如下图：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvdWFyZW5vdG1l_size_16_color_FFFFFF_t_70][]

[c_ _BitConverter]: https://blog.csdn.net/Qin066/article/details/88953822
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lvdWFyZW5vdG1l_size_16_color_FFFFFF_t_70]: /images/20221120/c10f99ff549c4c8b8f58e33daa59498c.png