Ans:-
Here i have taken two TextBox and one DropDownList to check TextBoxes and DDL is Empty or not.If Empty....it will show message to Enter the Required field......See the below Codes..
validationusingJS.aspx:-
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="validationusingJS.aspx.cs" Inherits="validationusingJS" %>
<!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>Validation using JS</title>
<script type="text/javascript" language="javascript">
function validate() {
var id = document.getElementById("txtId");
var name = document.getElementById("txtName");
var items=document.getElementById('<%=DropDownList1.ClientID%>')
if (id.value == "") {
id.focus();
alert("Plz Enter Id..");
return false;
}
else if (name.value == "") {
name.focus();
alert("Plz Enter Name..");
return false;
}
else if (items.selectedIndex == 0) {
items.focus();
alert("Plz Enter Items..");
return false;
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
ID : <asp:TextBox ID="txtId" runat="server"></asp:TextBox>
<br />
Name : <asp:TextBox ID="txtName" runat="server"></asp:TextBox>
<br />
Select Items : <asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem Text="Item1" Value="Item1"></asp:ListItem>
<asp:ListItem Text="Item2" Value="Item2"></asp:ListItem>
</asp:DropDownList>
<br />
<asp:Button ID="btnSubmit" OnClientClick="return validate()" runat="server" Text="Submit" />
</div>
</form>
</body>
</html>
Here i have taken two TextBox and one DropDownList to check TextBoxes and DDL is Empty or not.If Empty....it will show message to Enter the Required field......See the below Codes..
validationusingJS.aspx:-
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="validationusingJS.aspx.cs" Inherits="validationusingJS" %>
<!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>Validation using JS</title>
<script type="text/javascript" language="javascript">
function validate() {
var id = document.getElementById("txtId");
var name = document.getElementById("txtName");
var items=document.getElementById('<%=DropDownList1.ClientID%>')
if (id.value == "") {
id.focus();
alert("Plz Enter Id..");
return false;
}
else if (name.value == "") {
name.focus();
alert("Plz Enter Name..");
return false;
}
else if (items.selectedIndex == 0) {
items.focus();
alert("Plz Enter Items..");
return false;
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
ID : <asp:TextBox ID="txtId" runat="server"></asp:TextBox>
<br />
Name : <asp:TextBox ID="txtName" runat="server"></asp:TextBox>
<br />
Select Items : <asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem Text="Item1" Value="Item1"></asp:ListItem>
<asp:ListItem Text="Item2" Value="Item2"></asp:ListItem>
</asp:DropDownList>
<br />
<asp:Button ID="btnSubmit" OnClientClick="return validate()" runat="server" Text="Submit" />
</div>
</form>
</body>
</html>
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