asp.net 2.0 making a Composite Control sample (ii) [sample code DOWNLOAD]

Asp.net| Control | sample | download

(i). overview
Demonstrate the production of a composite control by making a < calculator > function Custom Composite Control
(ii). Code
1. Core control implementation code file ComputeControl.cs
1using System;
2using System.Collections.Generic;
3using System.Text;
4using system.web;
5using System.Web.UI;
6using System.Web.UI.WebControls;
7
8namespace Kingcontrols
9{
Ten public class ComputeControl:System.Web.UI.WebControls.CompositeControl
11 {
12//operand
Private TextBox tb1;
Private TextBox TB2;
15
16//Display Results
Private Label lb;
18
19//Operation (+-*/)
Private Button bt1;
Private Button BT2;
Private Button BT3;
The private Button bt4;
24
protected override void CreateChildControls ()
26 {
TB1 = new TextBox ();
Tb1.id = "TextBox1";
this. Controls.Add (TB1);
30
TB2 = new TextBox ();
Tb2.id = "TextBox2";
this. Controls.Add (TB2);
34
LB = new Label ();
Lb.id = "Label1";
Notoginseng lb. BackColor = System.Drawing.Color.YellowGreen;
Lb. Text = "Result:";
this. Controls.Add (LB);
40
BT1 = new Button ();
Bt1.id = "Button1";
Bt1. Text = "+";
Bt1.commandargument = "+";
Bt1. Click + + new EventHandler (Bt_click);
this. Controls.Add (BT1);
BT2 = new Button ();
Bt2.id = "Button2";
Bt2. Text = "-";
Bt2.commandargument = "-";
Wuyi BT2. Click + + new EventHandler (Bt_click);
this. Controls.Add (BT2);
BT3 = new Button ();
Bt3.id = "Button3";
BT3. Text = "*";
bt3.commandargument = "*";
BT3. Click + + new EventHandler (Bt_click);
this. Controls.Add (BT3);
BT4 = new Button ();
Bt4.id = "Button4";
Bt4. Text = "/";
Bt4.commandargument = "/";
Bt4. Click + + new EventHandler (Bt_click);
The This. Controls.Add (BT4);
65}
66
Bt_click void (object sender, EventArgs e)
68 {
The Try
70 {
The IF ("Result:"!= lb. Text)
72 {
Lb. Text = lb. Text + ",";
74}
Switch ((Button) sender). CommandArgument)
76 {
Case "+": lb. Text = lb. Text + convert.tostring (Convert.ToInt32 (this.tb1.Text) + Convert.ToInt32 (this.tb2.Text)); Break
The case "-": lb. Text = lb. Text + convert.tostring (Convert.ToInt32 (This.tb1.Text)-Convert.ToInt32 (This.tb2.Text)); Break
The case "*": lb. Text = lb. Text + convert.tostring (Convert.ToInt32 (this.tb1.Text) * Convert.ToInt32 (This.tb2.Text)); Break
Case "/": lb. Text = lb. Text + convert.tostring (Convert.ToInt32 (this.tb1.Text)/Convert.ToInt32 (This.tb2.Text)); Break
81}
82}
The catch
84 {
The LB. Text = "It ' s" isn't right format, please input again. "
86}
87}
88
protected override void RenderContents (HtmlTextWriter output)
90 {
Output. Write ("a");
92
93}
94
protected override void Render (HtmlTextWriter writer)
96 {
The writer. RenderBeginTag (htmltextwritertag.table);
98
//operating Item 1
Writer. RenderBeginTag (htmltextwritertag.tr);
Writer. RenderBeginTag (HTMLTEXTWRITERTAG.TD);
102 TB1. RenderControl (writer);
The writer. RenderEndTag ();
Writer. RenderEndTag ();
105
//<br>
Writer. Writebreak ();
108
109//operating Symbol
The writer. RenderBeginTag (htmltextwritertag.tr);
Writer. RenderBeginTag (HTMLTEXTWRITERTAG.TD);
112 writer. Writeencodedtext ("+-*/");
113 writer. RenderEndTag ();
114 writer. RenderEndTag ();
115
116//operating item2
117 writer. RenderBeginTag (htmltextwritertag.tr);
118 writer. RenderBeginTag (HTMLTEXTWRITERTAG.TD);
119 TB2. RenderControl (writer);
Writer. RenderEndTag ();
121 writer. RenderEndTag ();
122
123//operating Symbol
124 writer. RenderBeginTag (htmltextwritertag.tr);
The writer. RenderBeginTag (HTMLTEXTWRITERTAG.TD);
126 writer. Writeencodedtext ("EQUAL");
127 writer. RenderEndTag ();
128 writer. RenderEndTag ();
129
130//the relust Label
131 writer. RenderBeginTag (htmltextwritertag.tr);
132 writer. RenderBeginTag (HTMLTEXTWRITERTAG.TD);
to the LB. RenderControl (writer);
134 writer. RenderEndTag ();
135 writer. RenderEndTag ();
136
137//button1
138 writer. RenderBeginTag (htmltextwritertag.tr);
139 writer. RenderBeginTag (HTMLTEXTWRITERTAG.NOBR);
140 writer. RenderBeginTag (HTMLTEXTWRITERTAG.TD);
The BT1. RenderControl (writer);
Bt2. RenderControl (writer);
143 BT3. RenderControl (writer);
144 BT4. RenderControl (writer);
145 writer. RenderEndTag ();
146 writer. RenderEndTag ();
147
148 writer. RenderEndTag ();
149}
150}
151}
152

2. Front page code usingcompositecontrol.aspx (use method)

1<%@ Page language= "C #" autoeventwireup= true "codefile=" UsingCompositeControl.aspx.cs "inherits=" Usingcompositecontrol "%>
2<%@ Register assembly= "Kingcontrols" namespace= "Kingcontrols" tagprefix= "KSP"%>
3. ...
4<ksp:computecontrol id= "compute1" runat= "Server"/>
5. ...
6

(iii). Sample code Download
Http://www.cnblogs.com/Files/ChengKing/KingControls.rar