Validation contol - Asp.Net

Default2.aspx.cs 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

Epublic partial class Default2: System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

btnsubmit_Click(object sende

protected void btnsubmit_Click(object sender, EventArgs e)

if (Page.IsValid)

{

else

{

lblmsg.Text "Thank You";

1blmsg.Text = "Fill Up All The Fields";

<form id="form1" runat="server">

<table style="width: 66%><tr><td class="style" colspan="3" align="center">

<asp:Label ID="Ibimsg" Text="President Election Form Choose your president" runat="server" / </td> </tr>

<<tr><td class="style3'> Candidate: </td> <td class="style2">

<asp:DropDownList ID="ddicandidate" runat="server" style="width:239px">

<asp:ListItem>Please Choose a Candidate</asp:ListItem>

<asp:ListItem>MH Kabir</asp:ListItem>

<asp:ListItem>Steve Taylor</asp:ListItem>

<asp:ListItem>John Abraham</asp:ListItem>

<asp:ListItem>Venus Williams</asp:ListItem>

</asp:DropDownList></td>

<td> <asp:RequiredFieldValidator ID="rfvcandidate runat="server" ControlToValidate="ddicandidate

ErrorMessage="Please choose a candidate InitialValue="Please choose a candidate"></asp:RequiredFieldValidator> </td> </tr>

<tr><td class="style3> House: </td> <td class="style2">

<asp:RadioButtonList ID="rbihouse" runat="server" RepeatLayout Flow"

<asp:ListItem>Red</asp:ListItem> <asp:ListItem>Blue</asp:ListItem> <asp:ListItem>Yellow</asp:ListItem> <asp:ListItem>Green</asp:ListItem> </asp:RadioButtonList></td>

<td><asp:RequiredFieldValidator ID="rvhouse" runat="server" ControlToValidate="rblhouse"

ErrorMessage "Enter your house name> </asp RequiredFieldValidator> <br /></td></tr>

<tr><td class="style3 Class: </td> <td class 'style2'> <asp:TextBox ID="txtclass" runat="server"></asp:TextBox></td>

<td> <asp:RangeValidator ID='rvclass" runat "server" ControlToValidate="txtclass"

ErrorMessage="Enter your class (6-12) Maximum Value="12" Minimum Value="6" Type="Integer"></asp RangeValidator> </td> </tr>

<tr><td class="style3'> Email: </td> <td class="style2'> <asp:TextBox ID="txtemail" runat="server" style= 'width:250px'></asp:TextBox></td> <td> <asp:RegularExpressionValidator ID="remail" runat="server" ControlToValidate= txtemail"

ErrorMessage="Enter your email ValidationExpression "\w+{[+]\w+)^@\w+{[-]\w+)^\_\w+{{-}\w+)"></asp:RegularExpression Validator>

</td> </tr> <tr> <td class="style3" align="center" colspan="3"> <asp:Button ID="btnsubmit" runat="server onclick="btnsubmit_Click" style="text-align: center" Text="Submit" style="width: 140px" /></td></tr></table>

<asp:ValidationSummary ID="ValidationSummary1" runat="server" DisplayMode = "BulletList ShowSummary="true" HeaderText="Errors:" /></form>