Can I check if a string contains a date? Like any date

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My table in database contains dates.
i want to remove the dates from the record if they are from before today i.e yesterday or day before yesterday and so on...

i know i can find a date in a string by splitting the word.
now how can i remove THAT date(date which i found in the string by splitting) if it is from before today??

What I have tried:

 while (READ.Read())
                {
                string date = READ.GetString(h);
                DateTime dt;
                string[] words = date.Split(' ');
                bool found = false;
                foreach (string word in words)
                {
                    if (DateTime.TryParse(word,out dt))
                    {
                        l = word;
                        found = true;
                        break;
                    }
                    
                if(found)
                {
                        result = DateTime.Compare(l, DateTime.Today);//error cannot compare string with datetime..


                    }
}

Posted 16-Jul-17 4:04am

chinu1d

Updated 16-Jul-17 6:34am

v2

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BillWoodruff 17-Jul-17 0:56am

Why not use a dedicated DateTimePicker Control and prevent errors by not allowing them to happen: like JQuery's:

https://www.youtube.com/watch?v=DORmHaYU27c

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Ravi Bhavnani · Answer 1 · 2017-07-16T04:28:00

Solution 1

You'll need to use Regex (regular expressions) to determine this. See the results of this[^] Google search to get started.

Also see this[^] CP answer for a quick solution.

/ravi

Posted 16-Jul-17 4:28am

Ravi Bhavnani

Updated 16-Jul-17 4:30am

v2

OriginalGriff · Answer 2 · 2017-07-16T04:33:00

Not easily, or even reliably.
The problem is that if you don;t know where the date is, or even ho0w long it it, then you presumably don't know what format it is in either - and that causes big problems.
The example you give is easy to spot: split the string on a space and check each "word" to see if it Parses as a Date value:

C#

DateTime dt;
string[] words = input.Split(' ');
bool found = false;
foreach (string word in words)
   {
   if (DateTime.tryParse(word, out dt))
      {
      found = true;
      break;
   }

But ... if the date is free form, then what stops the user entering "Hello today's date is 16th of July, 2017!"? And that's hard to find as a date, even with sophisticated checking.
If I was you, I'd redesign the input mechanism to make dates come from pickers, rather than parsing free form text.

Atlapure Ambrish · Answer 3 · 2017-07-16T06:34:00

If you can find the date part from the string and you know the format of date stored in database table then I think you can simply use parsedate method to convert the string to date and then compare it with current date using below code.

if(dateFoundInDB.Date ==DateTime.Now.Date)

if this condition is true use string.remove(dateFoundInDB) to remove the date from the string.

Can I check if a string contains a date? Like any date

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