Question

I am creating a reminder to match the date and time from user input. I can get the current date and time by using a Timer and ScriptManager. But I have no idea on how I should compare the date and time with the user input and make the label below visible after they are matched. Any ideas?

Here is my code:

public partial class Reminder : System.Web.UI.Page
{

private void UpdateTimer()
{
    LabelCurrentTime.Text = System.DateTime.Now.ToLongTimeString();
}

protected void Timer1_Tick(object sender, EventArgs e)
{
    UpdateTimer();
}
protected void Button1_Click(object sender, EventArgs e)
{
    string currentdate = LabelCurrentDate.Text;
    string currenttime = LabelCurrentTime.Text;

    string reminderdate = TextBoxReminderDate.Text;
    string remindertime = TextBoxReminderTime.Text;

    Timer1.Enabled = true;

    LabelCurrentTime.Text = System.DateTime.Now.ToLongTimeString();
    LabelCurrentDate.Text = System.DateTime.Now.Date.ToShortDateString();

    if (currentdate == reminderdate)
    {
        if (currenttime == remindertime)
        {
            Label1.Visible = true;
        }
    }
}
protected void Button2_Click(object sender, EventArgs e)
{
    Timer1.Enabled = false;
}
}

Here is the screenshot :
screenshot

Answer 1

You’re trying to deal with dates as strings. You shouldn’t do that.

First off, you shouldn’t accept the date as user input from a Textbox. There’s a specific DateTimePicker control specifically for having a user select a date. You should use that.

If you use the date picker for the user to provide a date then you can get the current date using DateTime.Now. Now that you have two real dates you can compare them using the > operator.