EBM Microsoft Technology Tutorial: Custom Validation for Date of Birth using three dropdownlist

This article is used to validate the date of birth having 3 dropdownlist control.first dropdownlist control populates data for Days second for Months and third for Years.this article is exactly usefull for the users those want to validate DOB containing three dropdownlist.Datasources for Days and Months populates from two XML Files(DD.xml and MM.xml) in this project.

Creatinng two xml files for Days and Months where thease will be used as a datasource to bind the dropdownlist controls for days and months only

<?xml version="1.0" encoding="UTF-8" ?>

- <DD>

</DD>
..save it as a DD.xml....
second xml file is following....
<?xml version="1.0" encoding="UTF-8" ?>

- <MM>

</MM>
save it as a MM.xml........
now take three dropdownlist controls on the page
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<html>
<head runat="server">
<title>Custom validation for Date of Birth</title>

         var sysDD = ArrSysDate[0];
         var sysMM = ArrSysDate[1];
         var sysYYYY = ArrSysDate[2];
         var SysDate = parseInt(sysDD);
         var SysMonth = parseInt(sysMM);
         var SysYear = parseInt(sysYYYY);

         var returndays = isleap(DobYear);

         if(DobDate > returndays && DobMonth=="2")
         {
         args.IsValid = false;
         return;
         }
        if(DobMonth % 2==0 && DobDate=="31")
        {
         args.IsValid = false;
         return;
        }

         if(DobYear > SysYear)
         {
         args.IsValid = false;
         return;
         }
         else if((DobYear == SysYear) && (DobMonth > SysMonth))
         {
         args.IsValid = false;
         return;
         }
         else if((DobYear == SysYear) && (DobMonth == SysMonth) && (DobDate > SysDate))
         {
          args.IsValid = false;
          return;
          }
          args.IsValid = true;
    }
        /////////////////////////////////////////////////////////////////////////////////////
        //.... function to check the leap year....
        // February has 29 days in any year evenly divisible by four,
        // Except for centurial years which are not also divisible by 400.
        function isleap(yr)
        {
         if ((parseInt(yr)%4) == 0)
         {
          if (parseInt(yr)%100 == 0)
          {
            if (parseInt(yr)%400 != 0)
            {
              return 28;
            }
            if (parseInt(yr)%400 == 0)
            {
              return 29;
            }
          }
          if (parseInt(yr)%100 != 0)
          {
            return 29;
          }
         }
         if ((parseInt(yr)%4) != 0)
         {
           return 28;
         }
        }
    </script>

</head>
<body>
    <form id="form1" runat="server">
        <div>
            <table border="0" cellpadding="0" cellspacing="0" width="837px">
                <tr>
                    <td width="10%">
                    </td>
                    <td width="5%">
                    </td>
                    <td width="75%">
                    </td>
                    <td width="5%">
                    </td>
                    <td width="5%">
                    </td>
                </tr>
                <tr>
                    <td>
                    </td>
                    <td>
                    </td>
                    <td colspan="2">
                    </td>
                    <td colspan="1">
                    </td>
                </tr>
                <tr>
                    <td>
                    </td>
                    <td>
                        DOB:</td>
                    <td colspan="2">
                        <asp:DropDownList ID="ddlDay" runat="server">
                        </asp:DropDownList>
                        <asp:DropDownList ID="ddlMonth" runat="server">
                        </asp:DropDownList>
                        <asp:DropDownList ID="ddlYear" runat="server">
                            <asp:ListItem Value="YYYY">YYYY</asp:ListItem>
                        </asp:DropDownList>
                        <asp:CustomValidator ID="custDateOfBirth" runat="server" ValidationGroup="vgValidation"
                            Display="Dynamic" ControlToValidate="txtBirthDate" ClientValidationFunction="CheckDate"
                            ErrorMessage="Invalid Date of Birth">
                        </asp:CustomValidator>
                        <asp:RequiredFieldValidator ID="rfvDay" runat="server" ControlToValidate="ddlDay"
                            Display="Dynamic" ErrorMessage="Day Required" InitialValue="DD" SetFocusOnError="True"
                            ValidationGroup="vgValidation"></asp:RequiredFieldValidator>
                         <asp:RequiredFieldValidator ID="rfvMonth" runat="server" ControlToValidate="ddlMonth"
                            Display="Dynamic" ErrorMessage="Month Required" InitialValue="MM" SetFocusOnError="True"
                            ValidationGroup="vgValidation"></asp:RequiredFieldValidator> <asp:RequiredFieldValidator
                                ID="rfvYear" runat="server" ControlToValidate="ddlYear" Display="Dynamic" ErrorMessage="Year Required"
                                InitialValue="YYYY" SetFocusOnError="True" ValidationGroup="vgValidation"></asp:RequiredFieldValidator>
                        <div id="divdateofbirth" style="display: none;">
                            <asp:TextBox ID="txtBirthDate" runat="server" Width="10px"></asp:TextBox>
                        </div>
                    </td>
                    <td colspan="1">
                    </td>
                </tr>
                <tr height="10px">
                    <td>
                    </td>
                    <td>
                    </td>
                    <td align="center">
                    </td>
                    <td>
                        <asp:HiddenField ID="hdnCurrentDate" runat="server" />
                    </td>
                    <td>
                    </td>
                </tr>
                <tr>
                    <td>
                    </td>
                    <td>
                    </td>
                    <td align="left">
                        <asp:Button ID="btnValidate" OnClientClick="SetBirthDate();" runat="server" Text="Validate"
                            ValidationGroup="vgValidation" /></td>
                    <td>
                    </td>
                    <td>
                    </td>
                </tr>
            </table>
        </div>
    </form>
</body>
</html>
...............................
Make a folder named "BusinessLogic" within App_Code Folder...... now create a class file name it as a "DataBL.cs"
...next come to write code within this class file.....using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// <summary>
/// Summary description for DataBL
/// </summary>
public class DataBL
{
    public DataBL()
    {
        //
        // TODO: Add constructor logic here
        //
    }

    public static void Bind(ref DropDownList ddl, string type)
    {
        DataSet ds = new DataSet();
        if (type == "Day")
            ds.ReadXml(HttpContext.Current.Server.MapPath("./DD.xml"));
        else
            ds.ReadXml(HttpContext.Current.Server.MapPath("./MM.xml"));

        ddl.DataSource = ds;
        ddl.DataTextField = "name";
        ddl.DataValueField = "value";
        ddl.DataBind();
    }
    public static void BindYr(ref DropDownList ddl)
    {
        for (int i = 1950; i <= DateTime.Now.Year; i++)
        {
            ddl.Items.Add(new ListItem(i.ToString(), i.ToString()));
        }
    }
}
------------------------------------------------------------------------
..now write following code into the code behind file.........using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            hdnCurrentDate.Value = DateTime.Now.ToString("dd-MM-yyyy");
            DataBL.Bind(ref ddlDay,"Day");
            DataBL.Bind(ref ddlMonth,"Month");
            DataBL.BindYr(ref ddlYear);
        }
    }
}

EBM Microsoft Technology Tutorial

Custom Validation for Date of Birth using three dropdownlist

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