Number of days between 2 dates

Question

Hi friends.

I have your help. Again.

I want to make little program to calculate number of days between 2 dates. Something like this - with two DateTimePicker, one TextBox and one Button:

What code to put in button to calculate number of days between dates and show it in textbox ?

If you have another idea without DateTimePicker ... with two Month Calendars, pleas tell me.

With best regards.

vesodimov

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From Bulgaria

Answer 1

(Date1- Date2).TotalDays

more explicit

DateTime d1 = this.dateTimePicker1.Value;
            DateTime d2 = this.dateTimePicker2.Value;
            MessageBox.Show(((int)(d1 -d2).TotalDays).ToString());

            TimeSpan t = d1-d2;
            MessageBox.Show(t.ToString());

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Hope it helps. Spiri

Answer 2

Thank you, Spiri.

First I got more than 20 errors. When I edit your code I have just one. In line

MessageBox.Show(((Int())(d1() - d2()).TotalDays).ToString())

I got this message :

Argument not specified for parameter 'p1' of 'Private Function Int(p1 As Object) As Object'.

Where is my mistake ?

Now all my code is like this:

DateTime(d1() = this.DateTimePicker1.Value)
        DateTime(d2() = this.DateTimePicker2.Value)
        MessageBox.Show(((Int())(d1() - d2()).TotalDays).ToString())

        TimeSpan(t() = d1() - d2())
        MessageBox.Show(t.ToString())

Q2: where to put the code ? In TextBox or in Button ?

Regards

vesodimov

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From Bulgaria

Answer 3

hello ...first. when do you want this to be fired?

if in the button click then write it in the button click event

first you have to declare the variables :

            DateTime d1 = this.dateTimePicker1.Value;
            DateTime d2 = this.dateTimePicker2.Value;

make sure you type the wright names for the Datetimepicker

this is one method ...

 MessageBox.Show(((Int())(d1() - d2()).TotalDays).ToString())

this is another method..

        TimeSpan(t() = d1() - d2())
        MessageBox.Show(t.ToString())

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Hope it helps. Spiri

Answer 4

Hi.

Two methods not work for me. Please send me screenshot on your working Form. My result is:

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From Bulgaria

Answer 5

hello ,

this looks like a homework i will not paste a working form.

since you are using visual basic here you have a link to datediff function in VB:

DateDiff Function (Visual Basic)

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Hope it helps. Spiri

Answer 6

I find the correct code :

TextBox1.Text = (DateTimePicker2.Value - DateTimePicker1.Value).Days

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From Bulgaria