String was not recognized as a valid DateTime.

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Why the error giving -> String was not recognized as a valid DateTime.

My cs code is given below

C#

private void button1_Click(object sender, EventArgs e)
        {
            string d = textBox1.Text;
            DateTime dob = Convert.ToDateTime(d.ToString());
            int age = CalculateYorAge(dob);
            MessageBox.Show(dob.ToString());
            label1.Text = age.ToString();
         }    

public static int CalculateYorAge(DateTime birthDaydate)
        {
            int yearsAge = DateTime.Now.Year - birthDaydate.Year;
            if (DateTime.Now.Month < birthDaydate.Month || (DateTime.Now.Month == birthDaydate.Month && DateTime.Now.Day < birthDaydate.Day))                yearsAge--; return yearsAge;
        }

Posted 15-Mar-12 21:14pm

Janardan Pandey

Updated 15-Mar-12 21:18pm

member60

v2

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2 solutions

Solution 2

i am not getting any error trying your code the thing is that, what are you giving input in texbox ? if i given as: 5/8/1987 it displays as 24. fine !

try:

C#

DateTime dob = DateTime.ParseExact(d, "dd/MM/yyyy", null);

Posted 15-Mar-12 21:32pm

member60

Updated 15-Mar-12 21:44pm

v3

Comments

Janardan Pandey 16-Mar-12 3:36am

but please input 17/12/1984 and check it.

member60 16-Mar-12 3:45am

see my updated solution.or just:
DateTime dob = DateTime.ParseExact(d, "dd/MM/yyyy", null);

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KIDYA · Accepted Answer · 2012-03-15T21:21:00

Solution 1

Add below line instead of

C#

DateTime dob = Convert.ToDateTime(d.ToString());

If you are entering string in dd/MM/yyyy then use below code else change accordingly.

C#

DateTime dob = DateTime.ParseExact(d, "dd/MM/yyyy HH:mm:ss", CultureInfo.InvariantCulture);

Posted 15-Mar-12 21:21pm

KIDYA

Updated 14-Nov-12 3:30am

v2