Temporary code segment

# Region difference days

Public static string DateDiff (DateTime DateTime1, DateTime DateTime2)
{
String dateDiff = null;
TimeSpan ts1 = new TimeSpan (DateTime1.Ticks );
TimeSpan ts2 = new TimeSpan (DateTime2.Ticks );
TimeSpan ts = ts1.Subtract (ts2). Duration ();
DateDiff = ts. Days. ToString ();
Return dateDiff;
}

# Endregion

# Region differs by 222 days

Public static string DateDiff (string DateTime1, string DateTime2)
{
String dateDiff = null;
TimeSpan ts1 = new TimeSpan (DateTime. Parse (DateTime1). Ticks );
TimeSpan ts2 = new TimeSpan (DateTime. Parse (DateTime2). Ticks );
TimeSpan ts = ts1.Subtract (ts2). Duration ();
DateDiff = ts. Days. ToString ();
Return dateDiff;
}

# Endregion

# Region date comparison

Public static bool CompareDate (string FirstDay, string NextDate)
{
DateTime One = Convert. ToDateTime (FirstDay );
DateTime Two = Convert. ToDateTime (NextDate );

Return One. CompareTo (Two)> 0? True: false;
}

# Endregion

# Compare the region date and output information

Public static void CompareDateAndOutStr (string str, string FirstDay, string NextDate)
{
If (FirstDay. Length! = 10 | NextDate. Length! = 10) OutputAndEnd (str + "stage. The date length is incorrect! ");
// HttpContext. Current. Response. Write (FirstDay + "dd" + NextDate );
If (! IsValidDate (FirstDay) |! IsValidDate (NextDate ))
{OutputAndEnd (str + "stage, Date Format incorrect! ");}
DateTime One = Convert. ToDateTime (FirstDay );
DateTime Two = Convert. ToDateTime (NextDate );

If (One. CompareTo (Two)> 0)
{
OutputAndEnd (str + "stage, the end date is earlier than the start date! ");
}
}

# Endregion

# Region verify the email format

Public static bool IsValidEmail (string strIn)
{

Return System. text. regularExpressions. regex. isMatch (strIn, @ "\ w + ([-+.] \ w +) * @ \ w + ([-.] \ w + )*\. \ w + ([-.] \ w + )*");
}

# Endregion

# Region verification Date Format

Public static bool IsValidDate (string strIn)
{

Return System. Text. RegularExpressions. Regex. IsMatch (strIn, @ "^ (19 | 20) \ d {2}-(0? \ D | 1 [012])-(0? \ D | [12] \ d | 3 [01]) $ ");
}

# Endregion