Development of composite controls

Composite Control
Using system;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. componentmodel;
Using system. Collections. Specialized;
Namespace custom
{
[Defaultproperty ("text "),
Toolboxdata ("<{0}: rendered runat = Server> </{0}: rendered>")]
Public class rendered: control, ipostbackdatahandler, ipostbackeventhandler
{
Private string text1;
Private string text2;
Private string text = "click the submit button to check whether the request matches .";
Private int number = 100;
Private int sum
{
Get
{
Return int32.parse (text1) +
Int32.parse (text2 );
}
}
Public int number
{
Get
{
Return number;
}
Set
{
Number = value;
}
}
Public String text
{
Get
{
Return text;
}
Set
{
TEXT = value;
}
}
Public event checkeventhandler check;

Protected virtual void oncheck (checkeventargs CE)
{
If (check! = NULL)
{
Check (this, CE );
}
}
Public Virtual bool loadpostdata (string postdatakey,
Namevaluecollection values)
{
Text1 = values [uniqueid + "T1"];
Text2 = values [uniqueid + "T2"];
Page. registerrequiresraiseevent (this );
Return false;
}
Public Virtual void raisepostdatachangedevent ()
{
}
Public void raisepostbackevent (string eventargument)
{
Oncheck (New checkeventargs (Sum-number ));
}
Protected override void render (htmltextwriter output)
{
Output. Write ("Output. Write ("<input type = text name =" + this. uniqueid + "T1" +
"Value = '0'> ");
Output. Write ("Output. Write ("<br> Output. Write ("<input type = text name =" + this. uniqueid + "T2" +
"Value = '0'> ");
Output. Write ("Output. Write ("<br> <input type = submit name =" +
This. uniqueid + "value = 'Submit'> ");
Output. Write ("<br> <span style = 'height: 50px; width: 500px; '>"
+ TEXT + "</span> ");
}
}
Public class checkeventargs: eventargs
{
Private bool match = false;

Public checkeventargs (INT difference)
{
If (difference = 0)
{
Match = true;
}
}
Public bool match
{
Get
{
Return match;
}
}
}
Public Delegate void checkeventhandler (Object sender, checkeventargs CE );
}
Public void sum_checked (Object sender, customcontrols. checkeventargs E)
{
If (E. Match = true)
Composite1.text = "<H2> your input matches! </H2> ";
Else
Composite1.text = "sorry, the sum of the numbers you entered is not equal to the built-in number! ";
}
User Controls and composite controls
Myusercontrol. ascx
Using system;
Using system. Data;
Using system. drawing;
Using system. Web;
Using system. Web. UI. webcontrols;
Using system. Web. UI. htmlcontrols;
Namespace compositecontrol
{
Public abstract class myusercontrol: system. Web. UI. usercontrol
{
Protected system. Web. UI. webcontrols. textbox box1;
Protected system. Web. UI. webcontrols. textbox box2;
Protected system. Web. UI. webcontrols. Button button;
Protected system. Web. UI. webcontrols. Label label;
Private int sum
{
Get
{
Ensurechildcontrols ();
Return int32.parse (box1.text) +
Int32.parse (box2.text );
}
}
Public int number = 100;
Public String text
{
Get
{
Ensurechildcontrols ();
Return label. text;
}
Set
{
Ensurechildcontrols ();
Label. Text = value;
}
}
Public event checkeventhandler check;
Public Virtual void oncheck (checkeventargs E)
{
If (check! = NULL)
{
Check (this, e );
}
}
Public void button_clicked (Object sender, eventargs E)
{
Oncheck (New checkeventargs (Sum-number ));
}
Private void page_load (Object sender, system. eventargs E)
{
// Place user code here to initialize the page
}
}
Public class checkeventargs: eventargs
{
Private bool match = false;

Public checkeventargs (INT difference)
{
If (difference = 0)
{
Match = true;
}
}
Public bool match
{
Get
{
Return match;
}
}
}
Public Delegate void checkeventhandler (Object sender, checkeventargs CE );
}

Public void sum_checked (Object sender, checkeventargs E)
{
If (E. Match = true)
Myusercontrol1.text = "<H2> your input matches! </H2> ";
Else
Myusercontrol1.text = "sorry, the sum of the numbers you entered is not equal to the built-in number! ";
}

Use Custom Controls
Mycomposite. CS
Using system;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. componentmodel;
Namespace customcontrols
{
/// <Summary>
/// Summary of webcustomcontrol1.
/// </Summary>
[Defaultproperty ("text "),
Toolboxdata ("<{0}: Composite runat = Server> </{0}: Composite>")]
Public class composite: control, inamingcontainer
// Identifies the container control that creates the new ID namespace in the control hierarchy of the page object. This is only a tag interface.
{
Private int number = 100;
Private Label label;

Public int number
{
Get
{
Return number;
}
Set
{
Number = value;
}
}
Private int sum
{
Get
{
Ensurechildcontrols ();
Return int32.parse (textbox) controls [1]). Text) +
Int32.parse (textbox) controls [4]). Text );
}
}
Public String text
{
Get
{
Ensurechildcontrols ();
Return label. text;
}
Set
{
Ensurechildcontrols ();
Label. Text = value;
}
}
Public event checkeventhandler check;
Protected virtual void oncheck (checkeventargs CE)
{
If (check! = NULL)
{
Check (this, CE );
}
}
Protected override void createchildcontrols ()
{
Controls. Add (New literalcontrol ("Textbox box1 = new Textbox ();
Box1.text = "0 ";
Controls. Add (box1 );
Controls. Add (New literalcontrol ("Controls. Add (New literalcontrol ("Textbox box2 = new Textbox ();
Box2.text = "0 ";
Controls. Add (box2 );
Controls. Add (New literalcontrol ("Button button1 = new button ();
Button1.text = "Submit ";
Controls. Add (New literalcontrol ("<br> "));
Controls. Add (button1 );
Button1.click + = new eventhandler (this. buttonclicked );
Controls. Add (New literalcontrol ("<br> "));
Label = new label ();
Label. Height = 50;
Label. width = 500;
Label. Text = "click the submit button to see if the button matches ";
Controls. Add (Label );
}
Protected override void onprerender (eventargs E)
{
(Textbox) controls [1]). Text = "0 ";
(Textbox) controls [4]). Text = "0 ";
}
Private void buttonclicked (Object sender, eventargs E)
{
Oncheck (New checkeventargs (Sum-number ));
}
}
Public class checkeventargs: eventargs
{
Private bool match = false;

Public checkeventargs (INT difference)
{
If (difference = 0)
{
Match = true;
}
}
Public bool match
{
Get
{
Return match;
}
}
}
Public Delegate void checkeventhandler (Object sender, checkeventargs CE );
}

Public void sum_checked (Object sender, custom. checkeventargs E)
{
If (E. Match = true)
Rendered. Text = "<H2> match you entered! </H2> ";
Else
Rendered. Text = "sorry, the sum of the numbers you entered is not equal to the built-in number! ";
}

Event Processing for composite controls
Eventbubbler. CS
Using system;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. componentmodel;
Namespace compositeevent
{
[Defaultproperty ("text "),
Toolboxdata ("<{0}: eventbubbler runat = Server> </{0}: eventbubbler>")]
Public class eventbubbler: control, inamingcontainer
{
Private int number = 100;
Private Label label;
Private textbox box1;
Private textbox box2;
Public event eventhandler click;
Public event eventhandler reset;
Public event eventhandler submit;
Public String label
{
Get
{
Ensurechildcontrols ();
Return label. text;
}
Set
{
Ensurechildcontrols ();
Label. Text = value;
}
}
Public int number
{
Get
{
Return number;
}
Set
{
Number = value;
}
}
Public String text1
{
Get
{
Ensurechildcontrols ();
Return box1.text;
}
Set
{
Ensurechildcontrols ();
Box1.text = value;
}
}
Public String text2
{
Get
{
Ensurechildcontrols ();
Return box2.text;
}
Set
{
Ensurechildcontrols ();
Box2.text = value;
}
}
Protected override void createchildcontrols ()
{
Controls. Add (New literalcontrol ("Box1 = new Textbox ();
Box1.text = "0 ";
Controls. Add (box1 );
Controls. Add (New literalcontrol ("Controls. Add (New literalcontrol ("Box2 = new Textbox ();
Box2.text = "0 ";
Controls. Add (box2 );
Controls. Add (New literalcontrol ("Button button1 = new button ();
Button1.text = "click ";
Button1.commandname = "click ";
Controls. Add (button1 );
Button button2 = new button ();
Button2.text = "reset ";
Button2.commandname = "reset ";
Controls. Add (button2 );
Button button3 = new button ();
Button3.text = "Submit ";
Button3.commandname = "Submit ";
Controls. Add (button3 );
Controls. Add (New literalcontrol ("<br> "));
Label = new label ();
Label. Height = 50;
Label. width = 500;
Label. Text = "click a button ";
Controls. Add (Label );
}
Protected override bool onbubbleevent (Object source, eventargs E)
{
Bool handled = false;
If (E is commandeventargs)
{
Commandeventargs Ce = (commandeventargs) E;
If (Ce. commandname = "click ")
{
Onclick (CE );
Handled = true;
}
Else if (Ce. commandname = "reset ")
{
Onreset (CE );
Handled = true;
}
Else if (Ce. commandname = "Submit ")
{
Onsubmit (CE );
Handled = true;
}
}
Return handled;
}
Protected virtual void onclick (eventargs E)
{
If (Click! = NULL)
{
Click (this, e );
}
}
Protected virtual void onreset (eventargs E)
{
If (reset! = NULL)
{
Reset (this, e );
}
}
Protected virtual void onsubmit (eventargs E)
{
If (submit! = NULL)
{
Submit (this, e );
}
}
}
}

Public void clickhandler (Object sender, eventargs E)
{
Mycontrol. Label = "you have clicked <B> click </B> ";
}
Public void resethandler (Object sender, eventargs E)
{
Mycontrol. text1 = "0 ";
Mycontrol. text2 = "0 ";
}
Public void submithandler (Object sender, eventargs E)
{
If (int32.parse (mycontrol. text1) + int32.parse (mycontrol. text2) = mycontrol. Number)
Mycontrol. Label = "<H2> matched! </H2> ";
Else
Mycontrol. Label = "sorry, the sum of the numbers you entered is not equal to the built-in number! ";
}

Compound Control that limits input content
Using system;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. componentmodel;
Using system. xml;
Using system. collections;
Namespace compositeinput
{
[Defaultproperty ("text "),
Toolboxdata ("<{0}: cominput runat = Server> </{0}: cominput>")]
Public class cominput: control, inamingcontainer
// Identifies the container control that creates the new ID namespace in the control hierarchy of the page object. This is only a tag interface.
{
Private string strfilename = "bad_words.xml ";
Private Label label;
Public String filename
{
Get
{
Return strfilename;
}
Set
{
Strfilename = value;
}
}
// Use the text content submitted by the user as the input parameter. If the content submitted by the user contains offensive words,
// The modified version is returned,
// Otherwise, the original text is directly returned.
Public String checkstring (string inputstring)
{
Arraylist alwordlist = new arraylist ();
String xmldocpath = This. Page. server. mappath ("bad_words.xml ");
Xmltextreader xmlreader = new xmltextreader (xmldocpath );
String asterisks = "*************************";
// Read the XML file that defines offensive words into an arraylist
While (xmlreader. Read ())
{
If (xmlreader. nodetype = xmlnodetype. Text)
Alwordlist. Add (xmlreader. value );
}
Xmlreader. Close ();
// Check the text content submitted by the user and replace the offensive words with an appropriate number of asterisks
Foreach (string element in alwordlist)
Inputstring = inputstring. Replace (element, asterisks. substring (1, (element. Length )));
Return inputstring;
}
Public String text
{
Get
{
Ensurechildcontrols ();
Return label. text;
}
Set
{
Ensurechildcontrols ();
Label. Text = value;
}
}
Public event checkeventhandler check;
Protected virtual void oncheck (checkeventargs CE)
{
If (check! = NULL)
{
Check (this, CE );
}
}
Protected override void createchildcontrols ()
{
Controls. Add (New literalcontrol ("Textbox box1 = new Textbox ();
Box1.text = "";
Controls. Add (box1 );
Controls. Add (New literalcontrol ("Button button1 = new button ();
Button1.text = "Submit ";
Controls. Add (New literalcontrol ("<br> "));
Controls. Add (button1 );
Button1.click + = new eventhandler (this. buttonclicked );
Controls. Add (New literalcontrol ("<br> "));
Label = new label ();
Label. Height = 50;
Label. width = 500;
Label. Text = "";
Controls. Add (Label );
}
Protected override void onprerender (eventargs E)
{
(Textbox) controls [1]). Text = "";
}
Private void buttonclicked (Object sender, eventargs E)
{
Oncheck (New checkeventargs (textbox) controls [1]). Text, checkstring (textbox) controls [1]). Text )));
}
}
Public class checkeventargs: eventargs
{
Private bool match = false;

Public checkeventargs (string str1, string str2)
{
If (str1 = str2)
{
Match = true;
}
}
Public bool match
{
Get
{
Return match;
}
}
}
Public Delegate void checkeventhandler (Object sender, checkeventargs CE );
}

Public void checktext (Object sender, compositeinput. checkeventargs E)
{
If (E. Match)
Cominput1.text = "Your submitted content has passed the check! ";
Else
Cominput1.text = "<H2> the content must comply with the site rules! Do not publish offensive words! </H2> ";
}