How to check whether the maskedTextBox has a valid date format

Nel

Hello,

Can anybody help me please how to check whether the entered date in the maskedTextBox is a valid date/has correct date format?

Thanks in advance.

6 Replies

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Vulpes14y ago
Accepted answer
I thought I'd just try the nullable type idea myself but it didn't work.

However, as long as 'datp' and 'com' are fields, this should work:

private void maskedTextBox1_TypeValidationCompleted(object sender, TypeValidationEventArgs e)
{
if (e.IsValidInput)
{
datp = (DateTime)e.ReturnValue;
com.Parameters.Add("@Data_otstran_rekl", OleDbType.Date).Value = datp;
}
else if (maskedTextBox1.Text == " . .")
{
com.Parameters.AddWithValue("@Data_otstran_rekl", DBNull.Value);
}
else
{
MessageBox.Show("Not a valid date");
maskedTextBox1.Focus();
}
}
Nel14y ago
Thank you Vulpes
Vulpes14y ago
Just a wild guess but does it permit an empty mask if you set the ValidatingType property to a nullable DateTime rather than an ordinary DateTime i.e: typeof(DateTime?)
Nel14y ago
Thank you to both of you. Vulpes now the validation is OK, but I also want to allo the maskedTextBox to be left empty.I have this code for click even in insert button:
if (maskedTextBox1.Text != " . .")
            {
                datp = DateTime.Parse(maskedTextBox1.Text);
                com.Parameters.Add("@Data_otstran_rekl", OleDbType.Date).Value = datp;
            }
            else
            {
               com.Parameters.AddWithValue("@Data_otstran_rekl", DBNull.Value);
            }
but because of the validation, this code can not be executed.
Can you help me please how to achieve this?
Thank you.
Vulpes14y ago
You can use the ValidatingType property in combination with the TypeValidationCompleted event to do this.

Check out this MSDN link:

http://msdn.microsoft.com/en-us/library/system.windows.forms.maskedtextbox.validatingtype.aspx

Prime b14y ago

Yes you can, you can do anything, this is programming. Also what time format do you need?

   Year:       YYYY (eg 1997)    Year and month:       YYYY-MM (eg 1997-07)    Complete date:       YYYY-MM-DD (eg 1997-07-16)    Complete date plus hours and minutes:       YYYY-MM-DDThh:mmTZD (eg 1997-07-16T19:20+01:00)    Complete date plus hours, minutes and seconds:       YYYY-MM-DDThh:mm:ssTZD (eg 1997-07-16T19:20:30+01:00)    Complete date plus hours, minutes, seconds and a decimal fraction of a second       YYYY-MM-DDThh:mm:ss.sTZD (eg 1997-07-16T19:20:30.45+01:00)