经常用到的Banner服务器控件的开发
无论是论坛,还是博客就连普通的个人网页就离不开Banner,Banner主要就是图片或Flash。以前经常用到都没有把他封装成一个服务器控件,今天有点空闲所以就把它封装了。
封装一个控件,首先当然要知道呈现的HTML代码了,其中Banner要判断是否为Flash或是图片,如果是Flash时我们还应该加入他所特有的一些属性,这个控件继承自System.Web.UI.WebControls.WebControl类,重写RenderContent方法实现,其他的一些说明在代码中有说明,这里就不多说了。下面我们来看看代码:
也许有些属性还没封装好,希望批评指教!
封装一个控件,首先当然要知道呈现的HTML代码了,其中Banner要判断是否为Flash或是图片,如果是Flash时我们还应该加入他所特有的一些属性,这个控件继承自System.Web.UI.WebControls.WebControl类,重写RenderContent方法实现,其他的一些说明在代码中有说明,这里就不多说了。下面我们来看看代码:
1
using System;
2
using System.IO;
3
using System.Text;
4
using System.Web.UI;
5
using System.ComponentModel;
6
using System.Web.UI.WebControls;
7![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
8
namespace NExplus.Controls
9
{
10
/// <summary>
11
/// 横幅广告控件。
12
/// </summary>
13
public class Banner:WebControl
14
{
15
/// <summary>
16
/// 初始化<see cref="Banner"/>类。
17
/// </summary>
18
public Banner() { }
19
/// <summary>
20
/// 获取或设置图片或Flash的路径。
21
/// </summary>
22
[DefaultValue(""),
23
MergableProperty(false),
24
Description("The path of the banner!")]
25
public string Path {
26
get {
27
object obj = this.ViewState["BannerPath"];
28
if (obj != null)
29
return (String)obj;
30
return null;
31
}
32
set {
33
this.ViewState["BannerPath"] = value;
34
}
35
}
36
/// <summary>
37
/// 获取或设置Flash的品质,如果是图片这将失效。
38
/// </summary>
39
[DefaultValue("high"), MergableProperty(false)]
40
public string FlashQuality
41
{
42
get
43
{
44
object obj = this.ViewState["FlashQuality"];
45
if (obj != null)
46
return Helper.IsNullOrEmpty((String)obj) ? "high" : (String)obj;
47
return "high";
48
}
49
set
50
{
51
this.ViewState["FlashQuality"] = value;
52
}
53
}
54
/// <summary>
55
/// 获取或设置是否为Flash,默认为<c>false</c>。
56
/// </summary>
57
[DefaultValue(false),
58
MergableProperty(false)]
59
public bool IsFlash {
60
get {
61
object obj = this.ViewState["IsFlash"];
62
if (obj != null)
63
return (bool)obj;
64
return false;
65
}
66
set {
67
this.ViewState["IsFlash"] = value;
68
}
69
}
70
/// <summary>
71
/// 获取或设置是否为透明广告。
72
/// </summary>
73
[DefaultValue(false),
74
MergableProperty(false)]
75
public bool IsFlashTransparent
76
{
77
get
78
{
79
object obj = this.ViewState["IsFlashTransparent"];
80
if (obj != null)
81
return (bool)obj;
82
return false;
83
}
84
set
85
{
86
this.ViewState["IsFlashTransparent"] = value;
87
}
88
}
89
/// <summary>
90
/// 重写并呈现控件。
91
/// </summary>
92
/// <param name="writer"><see cref="HtmlTextWriter"/>对象。</param>
93
protected override void RenderContents(HtmlTextWriter writer)
94
{
95
if (this.IsFlash && !Helper.IsNullOrEmpty(this.Path))
96
{
97
writer.Write("<object classid=\"clsid:D27CDB6E-AE6D-11cf-96B8-444553540000\" codebase=\"http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0\" width=\"{0}\" height=\"{1}\" id=\"movie\" align=\"\">{2}", this.Width == Unit.Empty ? 480 : this.Width, this.Height==Unit.Empty?60:this.Height, Environment.NewLine);
98
writer.Write("<param name=\"movie\" value=\"{0}\">{1}", this.Path, Environment.NewLine);
99
if (!Helper.IsNullOrEmpty(this.FlashQuality))
100
writer.Write("<param name=\"quality\" value=\"{0}\">{1}", this.FlashQuality, Environment.NewLine);
101
if (this.IsFlashTransparent)
102
writer.Write("<param name=\"wmode\" value=\"transparent\">{0}", Environment.NewLine);
103
writer.Write("<embed src=\"{0}\" quality=\"{1}\" width=\"{2}\" height=\"{3}\" name=\"movie\" align=\"\" type=\"application/x-shockwave-flash\" pluginspage=\"http://www.macromedia.com/go/getflashplayer\">{4}", this.Path,this.FlashQuality, this.Width == Unit.Empty ? 480 : this.Width, this.Height == Unit.Empty ? 60 : this.Height, Environment.NewLine);
104
writer.Write("</object>");
105
}
106
else if (!Helper.IsNullOrEmpty(this.Path))
107
{
108
writer.Write("<img src=\"{0}\" width=\"{1}\" height=\"{2}\" alt=\"{3}\" border=\"0\"/>", this.Path, this.Width == Unit.Empty ? 480 : this.Width, this.Height == Unit.Empty ? 60 : this.Height, this.ToolTip);
109
}
110
base.RenderContents(writer);
111
}
112
}
113
}
114![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
2
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
3
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
4
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
5
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
6
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
7
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
8
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
9
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
10
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
11
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
12
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
13
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
14
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
15
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
16
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
17
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
18
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
19
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
20
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
21
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
22
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
23
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
24
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
25
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
26
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
27
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
28
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
29
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
30
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
31
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
32
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
33
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
34
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
35
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
36
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
37
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
38
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
39
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
40
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
41
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
42
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
43
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
44
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
45
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
46
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
47
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
48
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
49
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
50
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
51
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
52
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
53
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
54
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
55
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
56
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
57
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
58
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
59
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
60
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
61
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
62
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
63
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
64
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
65
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
66
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
67
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
68
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
69
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
70
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
71
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
72
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
73
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
74
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
75
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
76
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
77
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
78
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
79
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
80
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
81
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
82
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
83
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
84
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
85
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
86
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
87
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
88
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
89
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
90
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
91
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
92
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
93
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
94
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
95
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
96
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
97
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
98
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
99
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
100
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
101
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
102
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
103
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
104
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
105
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
106
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
107
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
108
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
109
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
110
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
111
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
112
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
113
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
114
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
也许有些属性还没封装好,希望批评指教!