How to make validations.....in asp.net c#

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Dear Frnds,

I have created a web page in asp.net using c# Sqlserver 2005.

In this i have textboxes and a submit button to save the data in database.
But here, i need to set validations here
I have 3 fields as Telephone Home, Telephone Office, MobileNo
Here User can enter in enter in 3 textboxes
user can enter in 2 textboxes,
but 3 textboxes should not be empty, at least one should filled

Please can you help me, how to do this.
Thanks in advance

Posted 11-Mar-14 0:43am

Software Engineer 892

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Kornfeld Eliyahu Peter 11-Mar-14 7:23am

Do some reading here - http://msdn.microsoft.com/en-us/library/debza5t0(v=vs.100).aspx

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manvendra patel · Answer 1 · 2014-03-11T01:01:00

hello i have created simple code ,u can try this -

XML

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default4.aspx.cs" Inherits="Default4" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>


        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
         <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
          <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>

        <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
    </div>
    </form>
</body>
</html>

c# code -

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class Default4 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (TextBox1.Text == "" && TextBox2.Text == "" && TextBox3.Text == "")
        {
            Label1.Text = "mobile number does not save";

        }
        else
        {

            Label1.Text = "save ur mobile number ";


        }
    }
}

if all text box null than it show mobile number does not save otherwise if any textbox have some value than mobile number will be successfully saved.

SanSkun · Answer 2 · 2014-03-11T01:26:00

Hi,
Here i did with java script working fine.Check this add the bellow script in head section

JavaScript

<script type="text/javascript">
    <!--
    function validation()
    {
            if (document.getElementById("txtPhoneHome").value == "" && document.getElementById("txtPhoneOffice").value == ""&&document.getElementById("txtMobile").value == "")
            {
                alert('Please enter atleast one contact no.');
                document.getElementById("txtMobile").focus();
                return false;
            }

        }
    -->
    </script>

and here html form

ASP.NET

<asp:textbox id="txtPhoneHome" runat="server" onkeypress="return clickButton(event,'btnSubmit')"></asp:textbox>
        <asp:textbox id="txtPhoneOffice" runat="server" onkeypress="return clickButton(event,'btnSubmit')"></asp:textbox>
        <asp:textbox id="txtMobile" runat="server" onkeypress="return clickButton(event,'btnSubmit')"></asp:textbox>

        <asp:button id="btnSubmit" runat="server" text="Submit" onclientclick="return validation();" />

ravikhoda · Answer 3 · 2014-03-11T01:04:00

use custom validation funuction and use this property

ClientValidationFunction="Validate"

JavaScript

function Validate(sender, args) {
       var txt1 = document.getElementById("txtphoneh");
       var txt2 = document.getElementById("txtphonew");
       var txt3 = document.getElementById("txtphonec");
       args.IsValid = ((txt1.value != "") || (txt2.value != "") || (txt3.value != ""));

           }

Kan07 · Answer 4 · 2014-03-11T01:16:00

Client side Validation is better.....

XML

function ValidateData(){

      var TextVal= document.getElementById('<%=txtbox1.ClientID %>').value;
          if (TextVal== "") {
              alert("text box Can't be empty ");
              document.getElementById('<%=txtbox1.ClientID%>').focus();
              return false;
          }

          var textpart = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
          var validtext = textpart .test(TextVal);

          if (!validtext ) {
              alert("Your textbox contain invalid ..... again.");
              document.getElementById('<%=txtEmailID.ClientID%>').focus();
              return false;}
}
else
return true



call ValidateData() in clientclik event ......

How to make validations.....in asp.net c#

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