ASP. NET Programming Model: registerstartupscript registers a script with the page

<% @ Page Language = " C # " Autoeventwireup = " True " Codefile = " Default3.aspx. CS " Inherits = " Webparts_default3 "   %>

<% @ Register SRC = " Selectpro. ascx " Tagname = " Selectpro " Tagprefix = " Uc1 "   %>
<! 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 > No title page </ Title >
</ Head >
< Body >
< Form ID = "Form1" Runat = "Server" >
< Div Onclick = 'Test ()' >
< ASP: textbox ID = "Textbox1" Runat = "Server" > </ ASP: textbox >
< ASP: textbox ID = "Textbox2" Runat = "Server" > </ ASP: textbox >
< ASP: textbox ID = "Textbox3" Runat = "Server" > </ ASP: textbox >
< ASP: textbox ID = "Textbox4" Runat = "Server" > </ ASP: textbox >
< ASP: textbox ID = "Textbox5" Runat = "Server" > </ ASP: textbox >
</ Div >

< Script Type = "Text/JavaScript" >
Function Test ()
{
Alert ( ' <% = Textbox1.clientid %> ' );

}


</ Script >

</Form>
</Body>
</Html>

 

Using System;
Using System. collections;
Using System. configuration;
Using System. Data;
Using System. Web;
Using System. Web. Security;
Using System. Web. UI;
Using System. Web. UI. htmlcontrols;
Using System. Web. UI. webcontrols;
Using System. Web. UI. webcontrols. webparts;

Public Partial ClassWebparts_default3: system. Web. UI. Page
{
Protected VoidPage_load (ObjectSender, eventargs E)
{
Set1 ();//Or set2 ();
}

Public   Void Set1 ()
{
String Script =   "" ;
For ( Int I =   0 ; I < Page. Form. Controls. Count; I ++ )
{
If (Page. Form. controls [I] Is Textbox)
{
Textbox txt = Page. Form. controls [I] As Textbox;
TXT. Attributes. Add ( " Onclick " , TXT. clientid +   " _ Show () " );
TXT. style. Add (htmltextwriterstyle. backgroundcolor, " Yellow " );
Script + =   " Function "   + TXT. clientid +   " _ Show () {alert (' "   + TXT. clientid +   " ');}; " ;
}
}
Page. clientscript. registerstartupscript ( This . GetType (), " Script " , " <SCRIPT> "   + Script +   " </SCRIPT> " );
}

Public   Void Set2 ()
{
String Script =   "" ;
For ( Int I =   0 ; I < Page. Form. Controls. Count; I ++ )
{
If (Page. Form. controls [I] Is Textbox)
{
Textbox txt = Page. Form. controls [I] As Textbox;
TXT. Attributes. Add ( " Onclick " , " Show (' "   + TXT. clientid +   " ') " );
TXT. style. Add (htmltextwriterstyle. backgroundcolor, " Red " );

Script =   " Function show (ID) {alert (ID );}; " ;
}
}
Page. clientscript. registerstartupscript ( This . GetType (), " Script " , " <SCRIPT> "   + Script +   " </SCRIPT> " );
}
}