PlaceHolder ,他个Panel用法上差 不多,但是他不会产生DIV 这样的HTML代码,你加进去的控件是什么就什么,不会产生额外的HTML 代码.
前台:
1<%
@ Page Language="C#" AutoEventWireup="true" CodeFile="panel_PlaceHolder.aspx.cs" Inherits="panel_PlaceHolder" %>
2
3<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
4
5<html xmlns="http://www.w3.org/1999/xhtml" >
6<head runat="server">
7 <title>无标题页</title>
8</head>
9<body>
10 <form id="form1" runat="server">
11 <div>
12 ================== Panel ==========<br />
13 <asp:Panel ID="Panel1" runat="server" BackColor="#FFE0C0" Height="50px" Width="125px">
14 </asp:Panel>
15
16 <br />
17 添加<asp:DropDownList ID="DropDownList1" runat="server" Width="96px">
18 </asp:DropDownList>个到文本标签<br />
19 添加<asp:DropDownList ID="DropDownList2" runat="server" Width="95px">
20 </asp:DropDownList>个到文本框<br />
21 添加<asp:TextBox ID="txt" runat="server" Width="88px"></asp:TextBox>进去(文字)<br />
22 <asp:Button ID="AddToPanel" runat="server" OnClick="AddToPanel_Click" Text="添加进去" />
23
24 <asp:CheckBox ID="YcPanel" runat="server" AutoPostBack="True" OnCheckedChanged="YcPanel_CheckedChanged"
25 Text="隐藏 Panel" /><br />
26 =================================<br />
27 <br />
28 =================== PlaceHolder =====<br />
29 <asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
30 <br />
31 <br />
32 <asp:Button ID="Button1" runat="server" Text="AddToPlaceHolder" OnClick="Button1_Click" /><br />
33 <br />
34 =================================<br />
35
36 </div>
37 </form>
38</body>
39</html>
40
后台:
1using System;
2using System.Data;
3using System.Configuration;
4using System.Collections;
5using System.Web;
6using System.Web.Security;
7using System.Web.UI;
8using System.Web.UI.WebControls;
9using System.Web.UI.WebControls.WebParts;
10using System.Web.UI.HtmlControls;
11
12public partial class panel_PlaceHolder : System.Web.UI.Page
13{
14
protected void Page_Load(object sender, EventArgs e)
15
{
16 if (!Page.IsPostBack)
17 {
18 for (int i = 1; i <= 3;i++ )
19 {
20 this.DropDownList1.Items.Add(i.ToString());
21 this.DropDownList2.Items.Add(i.ToString());
22
}
23 }
24 }
25 protected void AddToPanel_Click(object sender, EventArgs e)
26 {
27 //注意 a 的取值方法.
28 int a = int.Parse(this.DropDownList1.SelectedItem.Value);
29 for (int i = 1; i <= a; i++)
30 {
31 Label lb = new Label();
32 lb.ID = "lb" + i.ToString();
33 lb.Text = "高峰" + i.ToString()+"<br>";
34 Panel1.Controls.Add(lb);
35 }
36
37 //注意 b 的取值.
38 int b = int.Parse(this.DropDownList2.SelectedItem.Value);
39 for (int i = 1; i <= b;i++ )
40 {
41 TextBox tb = new TextBox();
42 tb.ID = "tb" + i.ToString();
43 tb.Text = "高峰" + i.ToString();
44 Literal lt = new Literal();
45 lt.Text = "<br>";
46 //添加到 Panel 中
47 Panel1.Controls.Add(tb);
48 Panel1.Controls.Add(lt);
49 }
50 Literal ltr = new Literal();
51 ltr.Text = this.txt.Text;
52 Panel1.Controls.Add(ltr);
53 }
54 protected void YcPanel_CheckedChanged(object sender, EventArgs e)
55 {
56 if (this.YcPanel.Checked)
57 {
58 this.Panel1.Visible = false;
59 this.YcPanel.Text = "显示 Panel";
60 }
61 else
62 {
63 this.Panel1.Visible = true;
64 this.YcPanel.Text = "隐藏 Panel";
65 }
66 }
67 protected void Button1_Click(object sender, EventArgs e)
68 {
69 HtmlButton hbt = new HtmlButton();
70 hbt.InnerText = "我是一个 Html 按钮!";
71
72 Literal lt = new Literal();
73 lt.Text = "<br>";
74
75 Button bt = new Button();
76 bt.Text = "我是一个 服务器 按钮";
77
78 //然后将这三个控件添加到 PlaceHolder 中
79 this.PlaceHolder1.Controls.Add(hbt);
80 this.PlaceHolder1.Controls.Add(lt);
81 this.PlaceHolder1.Controls.Add(bt);
82
83
84 }
85
}
86
前台:
1
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="panel_PlaceHolder.aspx.cs" Inherits="panel_PlaceHolder" %>2
3
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">4
5
<html xmlns="http://www.w3.org/1999/xhtml" >6
<head runat="server">7
<title>无标题页</title>8
</head>9
<body>10
<form id="form1" runat="server">11
<div>12
================== Panel ==========<br />13
<asp:Panel ID="Panel1" runat="server" BackColor="#FFE0C0" Height="50px" Width="125px">14
</asp:Panel>15
16
<br />17
添加<asp:DropDownList ID="DropDownList1" runat="server" Width="96px">18
</asp:DropDownList>个到文本标签<br />19
添加<asp:DropDownList ID="DropDownList2" runat="server" Width="95px">20
</asp:DropDownList>个到文本框<br />21
添加<asp:TextBox ID="txt" runat="server" Width="88px"></asp:TextBox>进去(文字)<br />22
<asp:Button ID="AddToPanel" runat="server" OnClick="AddToPanel_Click" Text="添加进去" />23
24
<asp:CheckBox ID="YcPanel" runat="server" AutoPostBack="True" OnCheckedChanged="YcPanel_CheckedChanged"25
Text="隐藏 Panel" /><br />26
=================================<br />27
<br />28
=================== PlaceHolder =====<br />29
<asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>30
<br />31
<br />32
<asp:Button ID="Button1" runat="server" Text="AddToPlaceHolder" OnClick="Button1_Click" /><br />33
<br />34
=================================<br />35
36
</div>37
</form>38
</body>39
</html>40
后台:
1
using System;2
using System.Data;3
using System.Configuration;4
using System.Collections;5
using System.Web;6
using System.Web.Security;7
using System.Web.UI;8
using System.Web.UI.WebControls;9
using System.Web.UI.WebControls.WebParts;10
using System.Web.UI.HtmlControls;11
12
public partial class panel_PlaceHolder : System.Web.UI.Page13
{14
protected void Page_Load(object sender, EventArgs e)15
{16
if (!Page.IsPostBack)17
{18
for (int i = 1; i <= 3;i++ )19
{20
this.DropDownList1.Items.Add(i.ToString());21
this.DropDownList2.Items.Add(i.ToString());22
}23
}24
}25
protected void AddToPanel_Click(object sender, EventArgs e)26
{27
//注意 a 的取值方法.28
int a = int.Parse(this.DropDownList1.SelectedItem.Value);29
for (int i = 1; i <= a; i++)30
{31
Label lb = new Label();32
lb.ID = "lb" + i.ToString();33
lb.Text = "高峰" + i.ToString()+"<br>";34
Panel1.Controls.Add(lb);35
}36
37
//注意 b 的取值.38
int b = int.Parse(this.DropDownList2.SelectedItem.Value);39
for (int i = 1; i <= b;i++ )40
{41
TextBox tb = new TextBox();42
tb.ID = "tb" + i.ToString();43
tb.Text = "高峰" + i.ToString();44
Literal lt = new Literal();45
lt.Text = "<br>";46
//添加到 Panel 中47
Panel1.Controls.Add(tb);48
Panel1.Controls.Add(lt);49
}50
Literal ltr = new Literal();51
ltr.Text = this.txt.Text;52
Panel1.Controls.Add(ltr);53
}54
protected void YcPanel_CheckedChanged(object sender, EventArgs e)55
{56
if (this.YcPanel.Checked)57
{58
this.Panel1.Visible = false;59
this.YcPanel.Text = "显示 Panel";60
}61
else62
{63
this.Panel1.Visible = true;64
this.YcPanel.Text = "隐藏 Panel";65
}66
}67
protected void Button1_Click(object sender, EventArgs e)68
{69
HtmlButton hbt = new HtmlButton();70
hbt.InnerText = "我是一个 Html 按钮!";71
72
Literal lt = new Literal();73
lt.Text = "<br>";74
75
Button bt = new Button();76
bt.Text = "我是一个 服务器 按钮";77
78
//然后将这三个控件添加到 PlaceHolder 中79
this.PlaceHolder1.Controls.Add(hbt);80
this.PlaceHolder1.Controls.Add(lt);81
this.PlaceHolder1.Controls.Add(bt);82
83
84
}85
}86
