<% @ Master language = "C #" autoeventwireup = "true" codefile = "Main. master. cs" inherits = "Main" masterpagefile = "" %>
<! 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> master page </title>
<Asp: contentplaceholder id = "head" runat = "server">
</ASP: contentplaceholder>
</Head>
<Body>
<Form ID = "form1" runat = "server">
<Div>
<Div style = "border-style: dashed; font-family:, Arial, Helvetica, sans-serif; font-size: XX-large; font-weight: 100; font-style: normal; font-variant: normal; text-transform: Capitalize; color: # ff0000 "> main master page! </Div>
<Br/>
<Div align = "center"
Style = "font-family:, Arial, Helvetica, sans-serif; font-size: Large; font-weight: 400; font-style: italic"> Hi! Welcome to ASP. net3.5! <Br/>
<Asp: button id = "button1" runat = "server" onclick = "button#click" text = "button"/>
</Div>
<Asp: contentplaceholder id = "contentplaceholder1" runat = "server">
</ASP: contentplaceholder>
<Div align = "center" style = "border-style: Ridge"> All Rights Reserved. Violators are required! Zhejiang New Energy Technology Co., Ltd. 2008 </div>
</Div>
</Form>
</Body>
</Html>
Using system;
Using system. collections;
Using system. configuration;
Using system. Data;
Using system. LINQ;
Using system. Web;
Using system. Web. Security;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. Web. UI. webcontrols. webparts;
Using system. Web. UI. htmlcontrols;
Using system. xml. LINQ;
Public partial class main: system. Web. UI. masterpage, imasterdata
{
Public int btncount
{
Get
{
Return this. viewstate ["btncount"] = NULL? 0: Convert. toint32 (this. viewstate ["btncount"]);
}
Set
{
This. viewstate ["btncount"] = value;
}
}
Protected void page_load (Object sender, eventargs E)
{
}
Protected void button#click (Object sender, eventargs E)
{
This. btncount ++;
}
}
Imasterdata
The interface code is as follows:
/// <Summary>
/// Master page data
/// </Summary>
Public interface imasterdata
{
Int btncount {Get; set ;}
}
Method 1:
On the content page, use:
(Main) This. Page. Master). btncount;
This method is not recommended, and the flexibility is very low. This line of code is dangerous if btncount or main is changed or selected on multiple master pages.
Method 2:
On the content page, use:
(Imasterdata) This. Page. Master). btncount;
It is recommended that you define an interface and call the Members to be called through the interface. For interface programming, I don't need to talk about the advantages.
Method 3:
On the content page, use:
This. Page. master. GetType (). getproperty ("btncount"). getvalue (this. Page. Master, null)
This is a relatively flexible method that cannot be used to determine errors during compilation. You can use this method in special cases.
Method 4:
Override object saveviewstate () and override void loadviewstate (Object savedstate)
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