public static string ConvertDynamicAyDateExpression(string expression)
{
StringBuilder result = new StringBuilder();
DateTime dtnow = DateTime.Now;
int uIndex = 0;
int axlength = expression.Length;
List <string> extString = new List <string>();
string resultString = null;
for (int i = 0; i < axlength; i++)
{
if (expression[i] == '-' || expression[i] == '.' || expression[i] == ' ' || expression[i] == ':')
{
result.Append(expression[i]);
}
else if (expression[i] == '%')
{
string _d = expression.Substring(i, 2);
switch (_d)
{
case "%y":
result.Append(dtnow.Year.ToString().PadLeft(2, '0'));
i++;
break;
case "%M":
result.Append(dtnow.Month.ToString().PadLeft(2, '0'));
i++;
break;
case "%d":
result.Append(dtnow.Day.ToString().PadLeft(2, '0'));
i++;
break;
case "%H":
result.Append(dtnow.Hour.ToString().PadLeft(2, '0'));
i++;
break;
case "%m":
result.Append(dtnow.Minute.ToString().PadLeft(2, '0'));
i++;
break;
case "%s":
result.Append(dtnow.Second.ToString().PadLeft(2, '0'));
i++;
break;
}
}
else if (expression[i] == '{')
{
MatchCollection matches = Regex.Matches(expression, @"{(?<c>.*?)}");
string xy = null;
foreach (Match match in matches)
{
GroupCollection groups = match.Groups;
xy = groups["c"].Value;
break;
}
if (!xy.IsNullAndTrimAndEmpty())
{
extString.Add(xy);
i = i + xy.Length + 1;
result.Append(zhanwei[uIndex]);
uIndex++;
}
}
else
{
result.Append(expression[i]);
}
}
resultString = result.ToString();
//分析运算式
if (extString.Count > 0)
{
int extStringIndex = 0;
int? _yyyy = null;
int? _MM = null;
DateTime?dtReturn = null; //临时使用计算add的
foreach (var item in extString)
{
if (item.IndexOf("%y") == 0)
{
//如果处理年
int operNo = item.Substring(2).ToInt();
int _ = dtnow.Year + operNo;
if (_ > YearStrick.MAXYEAR)
{
_ = YearStrick.MAXYEAR;
}
else if (_ < YearStrick.MINYEAR)
{
_ = YearStrick.MINYEAR;
}
_yyyy = _;
resultString = resultString.Replace(zhanwei[extStringIndex], _yyyy.ToString());
extStringIndex++;
}
else if (item.IndexOf("%M") == 0)
{
//如果处理月
int operNo = item.Substring(2).ToInt();
int _ = dtnow.Month + operNo;
if (_ > 12)
{
int _yeI = 0;
string _ye = null;
if (_yyyy == null)
{
//从result读取前
_ye = resultString.Substring(0, 4);
_yeI = _ye.ToInt();
}
else
{
_ye = _yyyy.Value.ToString();
_yeI = _yyyy.Value;
}
_yeI++;
if (_yeI > YearStrick.MAXYEAR)
{
_yeI = YearStrick.MAXYEAR;
}
resultString = resultString.Replace(_ye, _yeI.ToString());
int month = _ - 12;
_MM = month;
resultString = resultString.Replace(zhanwei[extStringIndex], _MM.ToString());
extStringIndex++;
}
else if (_ < 1)
{
int _yeI = 0;
string _ye = null;
if (_yyyy == null)
{
//从result读取前
_ye = resultString.Substring(0, 4);
_yeI = _ye.ToInt();
}
else
{
_ye = _yyyy.Value.ToString();
_yeI = _yyyy.Value;
}
_yeI--;
if (_yeI < YearStrick.MINYEAR)
{
_yeI = YearStrick.MINYEAR;
}
resultString = resultString.Replace(_ye, _yeI.ToString());
int month = _ + 12;
_MM = month;
resultString = resultString.Replace(zhanwei[extStringIndex], _MM.ToString());
extStringIndex++;
}
}
else if (item.IndexOf("%d") == 0)
{
//获得年月
int _yeI = 0;
string _ye = null;
if (_yyyy == null)
{
//从result读取前
_ye = resultString.Substring(0, 4);
_yeI = _ye.ToInt();
}
else
{
_ye = _yyyy.Value.ToString();
_yeI = _yyyy.Value;
}
int _MeI = 0;
string _Me = null;
if (_MM == null)
{
//从result读取前
_Me = resultString.Substring(5, 2);
_MeI = _Me.ToInt();
}
else
{
_Me = _MM.Value.ToString();
_MeI = _MM.Value;
}
int operNo = item.Substring(2).ToInt();
try
{
dtReturn = new DateTime(_yeI, _MeI, dtnow.Day);
dtReturn = dtReturn.Value.AddDays(operNo);
}
catch
{
//有时候因为此时 2月没有30,31,4月没有31日一样，这里时间要额外处理
var _2 = AyDatePickerHelper.NumOfDays(_yeI, _MeI);
if (dtnow.Day > _2)
{
int _21 = dtnow.Day - _2;
operNo = operNo + _21;
dtReturn = new DateTime(_yeI, _MeI, _2);
dtReturn = dtReturn.Value.AddDays(operNo);
}
}
var _343 = dtReturn.Value.Day.ToString().PadLeft(2, '0');
resultString = resultString.Replace(zhanwei[extStringIndex], _343);
extStringIndex++;
}
else if (item.IndexOf("%H") == 0)
{
dtReturn = InitReturnDate(resultString, _yyyy, _MM, dtReturn);
dtReturn = dtReturn.Value.AddHours(dtnow.Hour);
//dtReturn = new DateTime(dtReturn.Value.Year, dtReturn.Value.Month, dtReturn.Value.Day, dtnow.Hour, 0, 0);
int operNo = item.Substring(2).ToInt();
dtReturn = dtReturn.Value.AddHours(operNo);
var _343 = dtReturn.Value.Hour.ToString().PadLeft(2, '0');
resultString = resultString.Replace(zhanwei[extStringIndex], _343);
extStringIndex++;
}
else if (item.IndexOf("%m") == 0)
{
dtReturn = InitReturnDate(resultString, _yyyy, _MM, dtReturn);
string _he = resultString.Substring(11, 2);
int _heI = _he.ToInt();
dtReturn = new DateTime(dtReturn.Value.Year, dtReturn.Value.Month, dtReturn.Value.Day, _heI, dtnow.Minute, 0);
int operNo = item.Substring(2).ToInt();
dtReturn = dtReturn.Value.AddMinutes(operNo);
var _343 = dtReturn.Value.Minute.ToString().PadLeft(2, '0');
resultString = resultString.Replace(zhanwei[extStringIndex], _343);
extStringIndex++;
}
else if (item.IndexOf("%s") == 0)
{
dtReturn = InitReturnDate(resultString, _yyyy, _MM, dtReturn);
string _he = resultString.Substring(11, 2);
int _heI = _he.ToInt();
string _me = resultString.Substring(14, 2); //17,2代表获得秒
int _meI = _me.ToInt();
dtReturn = new DateTime(dtReturn.Value.Year, dtReturn.Value.Month, dtReturn.Value.Day, _heI, _meI, dtnow.Second);
int operNo = item.Substring(2).ToInt();
dtReturn = dtReturn.Value.AddSeconds(operNo);
var _343 = dtReturn.Value.Second.ToString().PadLeft(2, '0');
resultString = resultString.Replace(zhanwei[extStringIndex], _343);
extStringIndex++;
}
}
}
return(resultString);
}
private static void ReturnDateDateTime(string teSepc, List <string> strs, DateTime dtnow, ref int curSpecIndex, ref DateTime dtReturn, string _text)
{
var _p2 = _text.Split('-');
int _p2Length = _p2.Length;
for (int i = 0; i < _p2Length; i++)
{
var _p2_0 = _p2[i];
//当是特殊标记的时候处理
if (_p2_0 == teSepc)
{
if (strs.Count > curSpecIndex)
{
string _guize = strs[curSpecIndex];
string _yanma = null;
char oper = '+';
int operIndex = 2;
if (_guize.IndexOf(yuemo) > -1)
{
operIndex = 3;
oper = _guize[operIndex];
_yanma = _guize.Substring(0, 3);
}
else
{
oper = _guize[operIndex];
_yanma = _guize.Substring(0, 2);
}
int operNo = _guize.Substring(operIndex).ToInt();
//if (oper == '-')
//{
// operNo = operNo * (-1);
//}
if (_yanma == "%y")
{
int y = dtnow.Year + operNo;
dtReturn = new DateTime(y, 1, 1);
}
else if (_yanma == "%M")
{
dtReturn = new DateTime(dtReturn.Year, dtnow.Month, 1);
dtReturn = dtReturn.AddMonths(operNo);
}
else if (_yanma == yuemo)
{
dtReturn = new DateTime(dtReturn.Year, dtReturn.Month, AyDatePickerHelper.NumOfDays(dtReturn.Year, dtReturn.Month));
}
else if (_yanma == "%d")
{
try
{
dtReturn = new DateTime(dtReturn.Year, dtReturn.Month, dtnow.Day);
dtReturn = dtReturn.AddDays(operNo);
}
catch
{
//有时候因为此时 2月没有30,31,4月没有31日一样，这里时间要额外处理
var _2 = AyDatePickerHelper.NumOfDays(dtReturn.Year, dtReturn.Month);
if (dtnow.Day > _2)
{
int _21 = dtnow.Day - _2;
operNo = operNo + _21;
dtReturn = new DateTime(dtReturn.Year, dtReturn.Month, _2);
dtReturn = dtReturn.AddDays(operNo);
}
}
}
curSpecIndex++;
}
}
else if (_p2_0 == "%y")
{
dtReturn = new DateTime(dtnow.Year, 1, 1);
}
else if (_p2_0 == "%M")
{
dtReturn = new DateTime(dtReturn.Year, dtnow.Month, 1);
}
else if (_p2_0 == yuemo)
{
dtReturn = new DateTime(dtReturn.Year, dtReturn.Month, AyDatePickerHelper.NumOfDays(dtReturn.Year, dtReturn.Month));
}
else if (_p2_0 == "%d")
{
try
{
dtReturn = new DateTime(dtReturn.Year, dtReturn.Month, dtnow.Day);
}
catch
{
//有时候因为此时 2月没有30,31,4月没有31日一样，这里时间要额外处理
var _2 = AyDatePickerHelper.NumOfDays(dtReturn.Year, dtReturn.Month);
if (dtnow.Day > _2)
{
int _21 = dtnow.Day - _2;
dtReturn = new DateTime(dtReturn.Year, dtReturn.Month, _2);
dtReturn = dtReturn.AddDays(_21);
}
}
}
else
{
if (i == 0)
{
dtReturn = new DateTime(_p2_0.ToInt(), 1, 1);
}
else if (i == 1)
{
dtReturn = new DateTime(dtReturn.Year, _p2_0.ToInt(), 1);
}
else if (i == 2)
{
try
{
dtReturn = new DateTime(dtReturn.Year, dtReturn.Month, _p2_0.ToInt());
}
catch
{
//有时候因为此时 2月没有30,31,4月没有31日一样，这里时间要额外处理
int _12 = _p2_0.ToInt();
var _2 = AyDatePickerHelper.NumOfDays(dtReturn.Year, dtReturn.Month);
if (_12 > _2)
{
int _21 = _p2_0.ToInt() - _2;
dtReturn = new DateTime(dtReturn.Year, dtReturn.Month, _2);
dtReturn = dtReturn.AddDays(_21);
}
}
}
}
}
}
