Introduction :
CheckBoxList Control is used for selecting one or more predefined (Available in CheckBoxList) value. That means user can able to select only one or more values at a time. For eg., it is useful for selecting the User Interest , Things user is holding etc.,
ASP.NET CheckBoxList itself is a class like other controls which are present under System.Web.UI.WebControls namespace.Button Control is used to submit Page back to the Server. It's a Push Button which can be a Submit button or command Button. By Default, Button control is a Submit button until you set CommandName Property to the button Control.
So what's the difference between a Submit button and a Command button
Any submit button can be a command button if it has the commandName Property associated with it just by setting CommandName Property to any String. This will allow us to create multiple buttons in a web page and you can determine on the server side, which buton is clicked. The best example inside the GridView is we can have buttons to delete or to edit.
ASP.NET Button itself a class which is present under System.Web.UI.WebControls namespace.
Important Properties of ASP.NET Webserver Button control. You can Set /Get these property at Design time or at Runtime.
CausesValidation - Accept Boolean Value - Used to Validate the page when Button click event fires.
Enabled - Accept Boolean Value- Used to Get/Set button Enabled
Height - Accept IntergerValue - Used to Set/Get height of the textbox
OnClientClick - Accept String value - Used specify the client side function name (eg. Javascript function name.This property is available in .NET Framework 2.0 onwards which will execute the client side function by just setting the function name.)
Text - Accept String - Commenly Used property to Get/Set the the text inside the Name of the textbox which user can see.
Width - Accept IntergerValue - Used to set the width of the Button
Events Available in Asp.Net Webserver Button Controls are:
Click
Init
Load
PreRender
UnLoad
Lets See an example:
Your .aspx code will look like this for a WebServer Control Button <asp:Button ID="Button1" runat="server" onclientclick="MyJavaScriptFunction()" Text="Button" onclick="Button1_Click" />
Full Html Code with Javascript function <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>Button Example - DotNetSpark.com</title> <script language="javascript" type="text/javascript"> function MyJavaScriptFunction() { alert("Hello"); } </script> </head> <body> <form id="form1" runat="server"> <div> <asp:Button ID="Button1" runat="server" onclientclick="MyJavaScriptFunction()" Text="Button" onclick="Button1_Click" /> </div> </form> </body> </html>
And to assign value to the textbox programmatically in Button1_Click Event form the .cs file
protected void Button1_Click(object sender, EventArgs e) { Response.Write("You have clicked the button"); }
|