Email Binding in Asp.Net GridView

<asp:TemplateField HeaderText="Email">

                        <ItemTemplate>

                            <asp:HyperLink runat="server" ID="HyperLink1" NavigateUrl='<%# string.Format("mailto:{0}", Eval("Email")) %>'

                                Text='<%# Eval("Email") %>' />

                        </ItemTemplate>

                        

                    </asp:TemplateField>

Maxlength of Multilne Textbox in ASP.Net

<script language="javascript" type="text/javascript">

function textboxMultilineMaxNumber(txt, maxLen)

{

    try {

        if ((txt.value.length) > (maxLen-1 ))

        return false;

        }

 catch (e)

    {

    }

}

    </script>

<asp:TextBox ID="TextBox1" runat="server" Width="200px" TextMode="MultiLine" Height="100px"  onkeypress="return textboxMultilineMaxNumber(this,5)"></asp:TextBox>

Disable Cut, Copy & Paste in ASP.Net textbox

  <asp:TextBox ID="TextBox1" runat="server" oncopy="return false" onpaste="return false"

            oncut="return false"></asp:TextBox>