Lambda expressions provide you with a terse way of defining methods. : Lambda « LINQ « ASP.NET Tutorial






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File: NormalMethod.aspx

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    void Page_Init()
    {
        btn.Click += new EventHandler(btn_Click);
    }

    void btn_Click(object sender, EventArgs e)
    {
        lblResult.Text = DateTime.Now.ToString();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Normal Method</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <asp:Button
        id="btn"
        Text="Go!"
        Runat="server" />

    <asp:Label
        id="lblResult"
        Runat="server" />

    </div>
    </form>
</body>
</html>

File: AnonymousMethod.aspx

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

    void Page_Init()
    {
        btn.Click += delegate(object sender, EventArgs e){
            lblResult.Text = DateTime.Now.ToString();
        };
    }

</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Anonymous Method</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <asp:Button
        id="btn"
        Text="Go!"
        Runat="server" />

    <asp:Label
        id="lblResult"
        Runat="server" />

    </div>
    </form>
</body>
</html>

File: LambdaExpression.aspx

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
 "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    void Page_Init()
    {
        btn.Click += (sender, e) => lblResult.Text = DateTime.Now.ToString();
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Lambda Expressions</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <asp:Button
        id="btn"
        Text="Go!"
        Runat="server" />

    <asp:Label
        id="lblResult"
        Runat="server" />

    </div>
    </form>
</body>
</html>








17.5.Lambda
17.5.1.Lambda expressions provide you with a terse way of defining methods.