24 January 2014

updatepanel with dropdownlist example in asp.net

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="HA.Web.WebForm1" %>

<!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:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
                Select School:
                <asp:DropDownList ID="ddlSchool" runat="server" class="form-control input-sm" AutoPostBack="True"
                    OnSelectedIndexChanged="ddlSchool_SelectedIndexChanged">
                </asp:DropDownList>
                <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ForeColor="Red"
                    ControlToValidate="ddlSchool" Font-Size="X-Small" ErrorMessage="***" InitialValue="0"
                    ValidationGroup="valid"></asp:RequiredFieldValidator>
                    <br />
                Select Class:
                <asp:DropDownList ID="ddl_Class" runat="server" class="form-control input-sm" AutoPostBack="true"
                    OnSelectedIndexChanged="ddl_Class_SelectedIndexChanged">
                </asp:DropDownList>
                <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ForeColor="Red"
                    ControlToValidate="ddl_Class" Font-Size="X-Small" ErrorMessage="***" InitialValue="0"
                    ValidationGroup="valid"></asp:RequiredFieldValidator>
                    <br />
                Select Section:
                <asp:DropDownList ID="ddl_Section" runat="server" class="form-control input-sm">
                </asp:DropDownList>
                <asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ForeColor="Red"
                    ControlToValidate="ddl_Section" Font-Size="X-Small" ErrorMessage="***" InitialValue="0"
                    ValidationGroup="valid"></asp:RequiredFieldValidator>
            </ContentTemplate>
        </asp:UpdatePanel>
    </div>
    </form>
</body>
</html>

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