convert the string format date to date format using c#

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how to convert string format date into date format using c sharp.

Code as follows;

C#

string[] datecheck;
string dates = "";
datecheck = dates.Split(',');

from the above date in the string format, i am converting string format date into date format for that code as follows;

C#

string[] datecheck;
    string dates = "";
    string[] Coursecheck;
    datecheck = dates.Split(',');
    string dt = Convert.ToDateTime(dates).ToString("ddMMyyyy");
    Coursecheck = PKGMinorCode.Split(',');
    int len = datecheck.Length;
    for (int z = 0; z < len-1; z++)
    {
        for (int j = z + 1; j < len-1 ; j++)
        {
            if (Coursecheck[z] == "ARPA" && Coursecheck[j] == "ROC")
            {

                if (datecheck[z] < datecheck[j])
                {
                   ScriptManager.RegisterStartupScript(this, GetType(), "Invalid date", "alert('ROC Date is greater than the ARPA Date')", true);
                   return;
                }
            }
          }
         }

when i run the above code shows errors as follows;
operator '<' cannot be applied to operands of type string
the above error shows in the below line as follows;

C#

if (datecheck[z] < datecheck[j]).

please help me. what is the problem in my above code.
Regards,
Narasiman P

Posted 2-Apr-13 21:24pm

Member 8054539

Updated 2-Apr-13 21:31pm

Aarti Meswania

v2

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3 solutions

Solution 2

datecheck[] array type is string. Values stored in it are: '2013-03-29', '2013-03-30' and so on. You can't use ">" operand to compare dates stored in string variable. You need to convert string to date to enable comparison.

Please, read these articles:
DateTime.Parse() method[^]
DateTime.TryParse() method[^]
Convert.ToDateTime() method[^]

C#

if (Convert.ToDateTime(datecheck[z])<convert.todatetime(datecheck[z]))
{
//do something
}

Posted 2-Apr-13 21:41pm

Maciej Los

Updated 2-Apr-13 21:43pm

v2

Comments

Ian A Davidson 3-Apr-13 4:28am

+5 for Parse, TryParse. I don't know what the "convert" code is supposed to be here - it won't work. Parse, TryParse, ParseExact or TryParseExact are the way to go; the one you use will depend on what you need to do and what the likely inputs will be. You should, if you like, "compare and contrast" those methods of the DateTime class. Regards, Ian.

Maciej Los 3-Apr-13 5:24am

Thank you, Ian ;)
BTW: I don't see your 5...

Solution 3

There is a static function Compare in class string ,such as :

C#

if (string.Compare(datecheck[z] , datecheck[j])) 
{
   //your code
}

Posted 2-Apr-13 21:47pm

ningshunze

Updated 2-Apr-13 22:09pm

v3

Comments

[no name] 3-Apr-13 4:12am

if(Convert.ToDateTime(datecheck[z]) < Convert.ToDateTime(datecheck[j]))
{

}

when i run the above code shows the error message as follows;

Unable to cast object of type 'System.String[]' to type 'System.IConvertible'.
please help me.

what is the problem in my code.

regards,
Narasiman P.

Add a Solution

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Aarti Meswania · Accepted Answer · 2013-04-02T21:35:00

Solution 1

try this

C#

if (Convert.ToDatetime(datecheck[z]) < Convert.ToDatetime(datecheck[j]))

Note this will work if you have proper date value in datecheck[z] and datecheck[j]

HappyCoding!
:)

Posted 2-Apr-13 21:35pm

Aarti Meswania

convert the string format date to date format using c#

3 solutions

Solution 1

Solution 2

Solution 3

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convert the string format date to date format using c#

3 solutions

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Solution 3

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