// 将日期字符串解析为起止范围日期
// throw:
// Exception
public static void ParseDateRange(string strText,
out string strStartDate,
out string strEndDate)
{
strStartDate = "";
strEndDate = "";
int nRet = strText.IndexOf("-");
if (nRet == -1)
{
// 没有'-'
if (strText.Length == 4)
{
strStartDate = strText + "0101";
strEndDate = strText + "1231";
return;
}
if (strText.Length == 6)
{
strStartDate = strText + "01";
DateTime start = DateTimeUtil.Long8ToDateTime(strStartDate);
DateTime end = start.AddMonths(1);
end = new DateTime(end.Year, end.Month, 1); // 下月1号
end = end.AddDays(-1); // 上月最后一号
strEndDate = strText + end.Day;
return;
}
if (strText.Length == 8)
{
// 单日
strStartDate = strText;
strEndDate = "";
return;
}
// text-level: 用户提示
throw new Exception(
string.Format("日期字符串 '{0}' 格式不正确。应当为4/6/8字符",
strText)
);
}
else
{
string strLeft = "";
string strRight = "";
strLeft = strText.Substring(0, nRet).Trim();
strRight = strText.Substring(nRet + 1).Trim();
if (strLeft.Length != strRight.Length)
{
// text-level: 用户提示
throw new Exception(
string.Format("日期字符串 '{0}' 格式不正确。横杠左边的部分 '{1}' 和右边的部分 '{2}' 字符数应相等。",
strText,
strLeft,
strRight)
);
}
if (strLeft.Length == 4)
{
strStartDate = strLeft + "0101";
strEndDate = strRight + "1231";
return;
}
if (strLeft.Length == 6)
{
strStartDate = strLeft + "01";
DateTime start = DateTimeUtil.Long8ToDateTime(strRight + "01");
DateTime end = start.AddMonths(1);
end = new DateTime(end.Year, end.Month, 1); // 下月1号
end = end.AddDays(-1); // 上月最后一号
strEndDate = strRight + end.Day;
return;
}
if (strLeft.Length == 8)
{
// 单日
strStartDate = strLeft;
strEndDate = strRight;
return;
}
// text-level: 用户提示
throw new Exception(
string.Format("日期字符串 '{0}' 格式不正确。横杠左边或者右边的部分，应当为4/6/8字符",
strText)
);
}
}
