Re-uploads values between ASP. NET pages

1. Use query string

Note: I used to ignoreServer. urlencode ()AndServer. urldecode ()Remember, remember!

(1) Source Page

1 Protected VoidQuerystringbutton_click (ObjectSender, eventargs E)
2{
3Response. Redirect ("Querystringpage. aspx? Data ="+ Server. urlencode (datatosendtextbox. Text ));
4}
 

(2) Target page

 1    <  Form  ID  = "Form1" Runat  = "Server"  > 
 2       <  Div  > 
 3           <  H1  > Target page-query string </  H1  > 
 4 The data already ed from the source page is:<%  =  Server. urldecode (request. querystring [  "  Data  "  ])  %>  <  BR  /> <  BR  /> 
5       </  Div  > 
 7       </  Form  > 

2. Use session

(1) Source Page

 

1Protected VoidSessionstatebutton_click (ObjectSender, eventargs E)
2{
3Session ["Data"] = Datatosendtextbox. text;
4Response. Redirect ("Sessionstatepage. aspx");
5}
 

(2) Target page

 

<Div>
<H1> Target page-session state The data already edFromThe Source PageIs: <% = Session ["Data"] %> <Br/>
</Div>
</Form>
 

3.Use httppost

Note: This is the first time you have seen this usage. Remember this time.

(1) Source Page

 <ASP: buttonID= "Httppostbutton"Runat= "Server"Text= "Use httppost" 
Postbackurl= "~ /Httppostpage. aspx"/> <BR/> <BR/>
 

(2) Target page

 <  H1  > Target page-httppost </  H1  > 
The data already ed from the source page is: <%  =  Request. Form [  "  Datatosendtextbox  "  ]  %> <  BR  /> <  BR  /> 
 <  Fieldset  > 
 <  Legend  > All form data from the sending page </  Legend  > 
 < ASP: Label  ID  = "Receiveddatalabel"  Runat  = "Server"  Text  = "Label"  > </  ASP: Label  > 
 </  Fieldset  > 
 <  BR  /> 

 

  Protected   Void Page_load ( Object Sender, eventargs E)
{
System. Text. stringbuilder displayvalues =
 New System. Text. stringbuilder ();
System. Collections. Specialized. namevaluecollection
Postedvalues = request. form;
String nextkey;
 For ( Int I = 0 ; I <postedvalues. allkeys. length; I ++)
{
Nextkey = postedvalues. allkeys [I];
 If (Nextkey. substring ( 0 , 2 )! = "  __  " )
{
Displayvalues. append ( "  <Br>  " );
Displayvalues. append (nextkey );
Displayvalues. append ("  =  " );
Displayvalues. append (postedvalues [I]);
}
}
Receiveddatalabel. Text = displayvalues. tostring ();

}

4. Use public properties

(1) Source Page

 Note: This method is rarely used, but it is still used in some cases.

 Public StringDatatosend
{
Get
{
ReturnDatatosendtextbox. text;
}
}

Protected VoidPublicpropertiesbutton_click (ObjectSender, eventargs E)
{
Server. Transfer ("Publicpropertiespage. aspx");
}
 

(2) Target page

 

 <  Div  > 
<  H1  > Target page-public properties </  H1  > 
The data already ed from the source page is: <%  =  Previouspage. datatosend  %>  <  BR  /> < BR  /> 
 <  ASP: hyperlink  ID  = "Hyperlink1"  Runat  = "Server"  Navigateurl  = "~ /Default. aspx"  > Return to Source Page </  ASP: hyperlink  > 
 </ Div  > 

5. Use Control Infomation

(1) Source Page

 Note: In the past, I used to go to findcontrol () only when I applied the master page.

<ASP: textboxID= "Datatosendtextbox"Runat= "Server"Text= "Hello world! "> </ASP: textbox> <BR/> <BR/>
 

 Protected VoidControlinfobutton_click (ObjectSender, eventargs E)
{
Server. Transfer ("Controlinfopage. aspx");
}
 

(2) Target page

 

 <  H1  > Target page-control info </  H1  > 
The data already ed from the source page is:
<  ASP: Label  ID  = "Datareceivedlabel"  Runat  = "Server"  Text  = "Label"  > </  ASP: Label  > <  BR  /> <  BR  /> 

 

Protected VoidPage_load (ObjectSender, eventargs E)
{
VaRTextbox = previouspage. findcontrol ("Datatosendtextbox")AsTextbox;
If(Textbox! =Null)
{
Datareceivedlabel. Text = textbox. text;
}

}
 

Reflection: It seems that the author has not put cookies in this category, why?