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Aucma.Scada/HighWayIot.Common/StringChange.cs

213 lines
6.9 KiB
C#

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using System;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
namespace HighWayIot.Common
{
public class StringChange
{
private static readonly Lazy<StringChange> lazy = new Lazy<StringChange>(() => new StringChange());
public static StringChange Instance
{
get
{
return lazy.Value;
}
}
private StringChange() { }
/// <summary>
/// 将字符串强制转换成int转换失败则返回0
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public int ParseToInt(string str)
{
int returnInt = 0;
if (str == null || str.Trim().Length < 1)
{
return returnInt;
}
if (int.TryParse(str, out returnInt))
{
return returnInt;
}
else
{
return 0;
}
}
/// <summary>
/// char数组转Array
/// </summary>
/// <param name="cha"></param>
/// <param name="len"></param>
/// <returns></returns>
public string CharArrayToString(char[] cha, int len)
{
string str = "";
for (int i = 0; i < len; i++)
{
str += string.Format("{0}", cha[i]);
}
return str;
}
public string bytesToHexStr(byte[] bytes, int iLen)//e.g. { 0x01, 0x01} ---> " 01 01"
{
string returnStr = "";
if (bytes != null)
{
for (int i = 0; i < iLen; i++)
{
returnStr += bytes[i].ToString("X2");
}
}
return returnStr;
}
public byte[] HexStrTorbytes(string strHex)//e.g. " 01 01" ---> { 0x01, 0x01}
{
strHex = strHex.Replace(" ", "");
if ((strHex.Length % 2) != 0)
strHex += " ";
byte[] returnBytes = new byte[strHex.Length / 2];
for (int i = 0; i < returnBytes.Length; i++)
returnBytes[i] = Convert.ToByte(strHex.Substring(i * 2, 2), 16);
return returnBytes;
}
public string StringToHexString(string s, Encoding encode)
{
byte[] b = encode.GetBytes(s); //按照指定编码将string编程字节数组
string result = string.Empty;
for (int i = 0; i < b.Length; i++) //逐字节变为16进制字符以%隔开
{
result += "%" + Convert.ToString(b[i], 16);
}
return result;
}
public string HexStringToString(string hs, Encoding encode)
{
//以%分割字符串,并去掉空字符
string[] chars = hs.Split(new char[] { '%' }, StringSplitOptions.RemoveEmptyEntries);
byte[] b = new byte[chars.Length];
//逐个字符变为16进制字节数据
for (int i = 0; i < chars.Length; i++)
{
b[i] = Convert.ToByte(chars[i], 16);
}
//按照指定编码将字节数组变为字符串
return encode.GetString(b);
}
public byte[] Swap16Bytes(byte[] OldU16)
{
byte[] ReturnBytes = new byte[2];
ReturnBytes[1] = OldU16[0];
ReturnBytes[0] = OldU16[1];
return ReturnBytes;
}
/// <param name="strbase64">64Base码</param>
/// <param name="path">保存路径</param>
/// <param name="filename">文件名称</param>
/// <returns></returns>
public bool Base64ToImage(string strbase64, string path, string filename)
{
bool Flag = false;
try
{
//base64编码的文本 转为 图片
//图片名称
byte[] arr = Convert.FromBase64String(strbase64);//将指定的字符串(它将二进制数据编码为 Base64 数字)转换为等效的 8 位无符号整数数组。
using (MemoryStream ms = new MemoryStream(arr))
{
Bitmap bmp = new Bitmap(ms);//加载图像
if (!Directory.Exists(path))//判断保存目录是否存在
{
Directory.CreateDirectory(path);
}
bmp.Save((path + "\\" + filename + ".png"), System.Drawing.Imaging.ImageFormat.Png);//将图片以JPEG格式保存在指定目录(可以选择其他图片格式)
ms.Close();//关闭流并释放
if (File.Exists(path + "\\" + filename + ".png"))//判断是否存在
{
Flag = true;
}
}
}
catch (Exception ex)
{
Console.WriteLine("图片保存失败:" + ex.Message);
}
return Flag;
}
/// <summary>
/// 获取时间戳
/// </summary>
/// <returns></returns>
public long GetTimeStamp()
{
TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
return Convert.ToInt64(ts.TotalSeconds);
}
public byte[] ConvertFloatToINt(byte[] floatBytes)
{
byte[] intBytes = new byte[floatBytes.Length / 2];
for (int i = 0; i < intBytes.Length; i++)
{
intBytes[i] = floatBytes[i * 2];
}
return intBytes;
}
//CRC异或校验
public byte CalculateVerify(byte[] pMessage, int iLength)
{
UInt16 i;
byte iVerify = 0;
iVerify = pMessage[0];
for (i = 1; i < iLength; i++)
{
iVerify = (byte)(iVerify ^ pMessage[i]);
}
return iVerify;
}
public int HexStringToNegative(string strNumber)
{
int iNegate = 0;
int iNumber = Convert.ToInt32(strNumber, 16);
if (iNumber > 127)
{
int iComplement = iNumber - 1;
string strNegate = string.Empty;
char[] binchar = Convert.ToString(iComplement, 2).PadLeft(8, '0').ToArray();
foreach (char ch in binchar)
{
if (Convert.ToInt32(ch) == 48)
{
strNegate += "1";
}
else
{
strNegate += "0";
}
}
iNegate = -Convert.ToInt32(strNegate, 2);
}
return iNegate;
}
}
}