The action and method (the methods of Post and get) in the form are used

First, the form inside the action and method of post use

<%@ Page language="C #"autoeventwireup="true"codefile="Formsubmitpost.aspx.cs"inherits="Formsubmitpost"%><! DOCTYPE html>"http://www.w3.org/1999/xhtml">"Server"><meta http-equiv="Content-type"Content="text/html; Charset=utf-8"/> <title></title>"Form1"runat="Server" action=" formsubmitget.aspx "Method="Post"> <div> <input id="b"Name="b"Value="123"/> <input id="W"Type="Submit"/> </div> </form></body>
When you click the button to submit the browser address is http://localhost:1621/formsubmitpost.aspx, the page will refresh but the address is not changed
The Get use method of action and method in form
<%@ Page language="C #"autoeventwireup="true"codefile="Formsubmitget.aspx.cs"inherits="Formsubmitget"%><! DOCTYPE html>"http://www.w3.org/1999/xhtml">"Server"><meta http-equiv="Content-type"Content="text/html; Charset=utf-8"/> <title></title>"Form1"runat="Server"action= "Formsubmitget.aspx" method="Get"> <div> <input id="a"Name="a"Value="123"/> <input id="W"Type="Submit"/> </div> </form></body>
But when you click on the button to submit, the browser address is http://localhost:1621/formsubmitget.aspx?__VIEWSTATE=% 2fwepdwukltezndm3nzkxowrkebfil8xbs6u8bvkloo5sf6fsak0otj6zuc4n2an9oe4%3d&a=123&__viewstategenerator= 4b2c1984
And this address contains the values you passed.
In summary, the post will not show the value of the pass, then it is more secure
The action and method (the methods of Post and get) in the form are used