I have worked out the difference between two dates...BUT

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I would like to set a message box against the output text box (which is in days)

that is if I am "0 or > " you have time left etc and if you are " 0 or <" you have no time left"

the code i have used is as follows (but I am unable to use the if statement) against any of the text boxes(i get an error or overload message)

any advice appreciated

C#

private void dateTimePicker4_ValueChanged(object sender, EventArgs e)
        {
            try
            {
                DateTime startDate =
                    (DateTime)dateTimePicker4.Value;

                DateTime endDate =
                    (DateTime)dateTimePicker1.Value;

                DateTime endDate1 =
                    (DateTime)dateTimePicker2.Value;
                DateTime endDate2 =
                    (DateTime)dateTimePicker3.Value;
                TimeSpan ts = endDate.Subtract(startDate);
                TimeSpan ts1 = endDate1.Subtract(startDate);
                TimeSpan ts2 = endDate2.Subtract(startDate);



                textBox1.Text = ts.Days.ToString();
                textBox2.Text = ts1.Days.ToString();
                textBox3.Text = ts2.Days.ToString();
            }
            catch
            {

[edit] Added from Answer 1 :

k sorry (and thanks for the prompt response)

I used the following to try and post a value relating to the textbox1.text

C#

int datet;

datet = int.Parse(textBox1.Text);

if (datet <17)
{

MessageBox.Show("time is short);

}

[/edit]

Posted 16-Jul-15 8:50am

notsocsharp

Updated 16-Jul-15 9:09am

phil.o

v3

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Comments

[no name] 16-Jul-15 14:57pm

"I am unable to use the if statement)"... considering that there is no if statement in your code, I am not surprised. And, please do not think that we are going to guess which error you are getting.

[no name] 16-Jul-15 15:26pm

You should be using TryParse instead of Parse. If the textbox has a string "ABC" in it, your code will throw an exception.
And we still don't know what error you are seeing.

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Sergey Alexandrovich Kryukov · Accepted Answer · 2015-07-16T09:24:00

Try to use '-' subtraction operator defined for System.DateTime type, instead of System.DateTime.Subtract, it will make your code more readable and help to avoid confusions. As you already know, it produced the return of the type System.TimeSpan. Work with this type to see how many units of time are there.

Also, don't compare integers if you work with time. And, better don't use input from the TextBox to operate with time. If you need, for example, integer value representing days (minutes, hours, etc.) to add to time or subtract from time, better use NumericUpDown control or something similar.

—SA