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ASP.Net » Page » Postback 
Page IsPostBack Demo (C#)

<%@ Page Language="C#" Debug="true" %>
<script runat="server">

void Page_Load(){
   if (Page.IsPostBack){
       string[] choice = new string[3];
       choice[0"1";
       choice[1"2";
       choice[2"3";

       lblShipper.Text = "Shipper ID for " + txtShipNum.Text + " is " + Array.IndexOf(choice, txtShipNum.Text);
       lblShipper.Visible = true;
   }
}

</script>
<html>
<head>
    <title>Array Example</title>
</head>
<body>
    <form runat="server">
        Please enter your shipper name. 
        (should be "1"  or  "2"  or  "3"
        <br><asp:TextBox id="txtShipNum" runat="server" width="300px"></asp:TextBox>
        <br />
        Press button to find the Shipper ID number
        <asp:Button id="Button1" runat="server" Text="Submit"></asp:Button>
        <br />
        <asp:Label id="lblShipper" runat="server"></asp:Label>
    </form>
</body>
</html>

           
       
Related examples in the same category
1. Page.IsPostBack Property (VB.net)
2. Demonstration of IsPostBack property (VB.net)
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