This is just a function written in ASP.NET (C#) that validates an input date (with format dd-MM-yyyy) to see if it’s valid. An message will be displayed for each case to indicate the result.
Actually, you can change a bit in the format and separator to validate the given date in other formats such as: dd/MM/yyy, MM-dd-yyyy, MM/dd/yyyy, etc.
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class csharp_check_valid_date : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } public static bool isValidDate(string datePart, string monthPart, string yearPart) { DateTime date; string strDate = string.Format("{0}-{1}-{2}", datePart, monthPart, yearPart); if (DateTime.TryParseExact(strDate, "dd-MM-yyyy", System.Globalization.DateTimeFormatInfo.InvariantInfo, System.Globalization.DateTimeStyles.None, out date)) { return true; } else { return false; } } protected void btnValidate_Click(object sender, EventArgs e) { string date = txtDate.Text.Trim(); try { string[] date_arr = date.Split('-'); if (isValidDate(date_arr[0], date_arr[1], date_arr[2])) { lblMessage.Text = "The given date is VALID!"; } else { lblMessage.Text = "The given date is NOT VALID!"; } } catch(Exception ex) { lblMessage.Text = ex.Message.ToString(); } } } |
