Button.Click Event

 

Occurs when the Button control is clicked.

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

Public Event Click As EventHandler

The Click event is raised when the Button control is clicked. This event is commonly used when no command name is associated with the Button control (for instance, with a Submit button).

For more information about handling events, see Handling and Raising Events.

The following code example demonstrates how to specify and code an event handler for the Click event in order to display a message on the Web page when the Button control is clicked.

<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    Sub GreetingBtn_Click(ByVal sender As Object, _
                          ByVal e As EventArgs)

        ' When the button is clicked,
        ' change the button text, and disable it.

        Dim clickedButton As Button = sender
        clickedButton.Text = "...button clicked..."
        clickedButton.Enabled = False

        ' Display the greeting label text.
        GreetingLabel.Visible = True
    End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Button Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <h3>Simple Button Example</h3>

      <asp:Button id="Button1"
           Text="Click here for greeting..."
           OnClick="GreetingBtn_Click" 
           runat="server"/>
      <br />
      <br />
      <asp:Label ID="GreetingLabel" runat="server" 
                 Visible="false" Text="Hello World!" />
    </div>
    </form>
</body>
</html>

.NET Framework
Available since 1.1
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