How to check if the date is before today

1

Hello,

I would like to check if the date is before today. If not, a warning appears.

Thanks in advance

Capture

2

You can try to do this in code behind (.NET)


     protected void Page_Load(object sender, EventArgs e)
	 {
	     base.Page_Load(sender, e);
	     
         //-- attach an event to the date picker so that whenever a date is selected it will trigger a validation
	     REQUEST_DATETIME_CAL.AutoPostBack = true;
		 REQUEST_DATETIME_CAL.DateChanged += ValidateDate;
	     
	 }

    protected void ValidateDate(object sender, EventArgs e)
    {
        DateTime UserDate;

            if (DateTime.TryParse(REQUEST_DATETIME.Text, out UserDate))
            {
                //--- check if selected date is before or on today's date
                if ((UserDate - System.DateTime.Today).TotalDays <= 0)
                {
                    //---- display the error message and reset the input if necessary
                    REQUEST_VALIDATE_MSG.Text = REQUEST_DATETIME.Text + " is invalid";
                    REQUEST_DATETIME.Text = "";    //--- reset input
                }
                else
                {   
                    //--- if the date is right, clear the message
                    REQUEST_VALIDATE_MSG.Text = "";   
                }
                
            }
        
    }
3

Thank you Kevin! I found a solution one day before your answer and it’s quite similar :slight_smile: