Linq OfType Operator - How to filter elements in a sequence of a given type
LinqOfTypeOperator.aspx
<%@ Page Language="C#" AutoEventWireup="true" %>
<%@ Import Namespace="System.Linq" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Button1_Click(object sender, System.EventArgs e)
{
ArrayList items = new ArrayList();
items.Add(1);
items.Add("Crataeva marmelos");
items.Add(2);
items.Add("Durian Belanda");
items.Add(3);
items.Add("Figuier commun");
Label1.Text = "ArrayList (items):....... <br />";
foreach (var item in items)
{
Label1.Text += item.ToString() + "<br />";
}
IEnumerable<int> query = items.OfType<int>().Select(i => i);
Label2.Text = "Query Result After Call OfType Operator:....... <br />";
foreach (int item in query)
{
Label2.Text += item.ToString() + "<br />";
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Linq OfType Operator - How to filter elements in a sequence of a given type</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:DarkBlue; font-style:italic;">
Linq Standard Query Operator: Conversion Operator - OfType
<br />How to filter elements in a sequence of a given type
</h2>
<hr width="600" align="left" color="CornFlowerBlue" />
<asp:Label
ID="Label1"
runat="server"
Font-Size="X-Large"
ForeColor="DarkGreen"
Font-Italic="true"
>
</asp:Label>
<br />
<asp:Label
ID="Label2"
runat="server"
Font-Size="X-Large"
ForeColor="Purple"
Font-Italic="true"
>
</asp:Label>
<br />
<asp:Button
ID="Button1"
runat="server"
OnClick="Button1_Click"
Text="Test Linq Query Operator - OfType"
Height="45"
Font-Bold="true"
ForeColor="DodgerBlue"
/>
</div>
</form>
</body>
</html>
