using System;
using System.Web.UI;
using System.Web;
using System.Web.UI.WebControls;
using System.Diagnostics;
using System.ComponentModel;
using System.Drawing.Design;
using System.Drawing;
using System.Text;
using System.Reflection;
using System.Collections;
namespace WebControls
{
//LIST-STYLE-TYPE: disc
/// <summary>
/// 公告的列表样式
/// </summary>
public enum ListStyle
{
/// <summary>
/// 方块
/// </summary>
Square,//square
/// <summary>
/// 数字
/// </summary>
Decimal,//decimal
/// <summary>
/// 实心圆
/// </summary>
Disc,//disc
/// <summary>
/// 空心圆
/// </summary>
Circle,//circle
/// <summary>
/// 没有任何模式
/// </summary>
None,//none
}
/// <summary>
/// 列表浮动样式
/// </summary>
public enum FloatStyle
{
/// <summary>
/// 无
/// </summary>
None,
/// <summary>
/// 右
/// </summary>
Right,
/// <summary>
/// 左
/// </summary>
Left,
}
//direction="down";
/// <summary>
/// 公告的滚动方向
/// </summary>
public enum MarqueeDirection
{
/// <summary>
/// 向下
/// </summary>
Down,
/// <summary>
/// 向上
/// </summary>
Up,
/// <summary>
/// 向右
/// </summary>
Right,
/// <summary>
/// 向左
/// </summary>
Left,
}
/// <summary>
/// 超链接目标
/// </summary>
public enum LinkTarget
{
Blank,
Parent,
Self,
Top,
Search,
}
/// <summary>
/// 滚动的行为
/// </summary>
public enum ScrollBehavior
{
/// <summary>
/// 交替滚动
/// </summary>
Alternate,
/// <summary>
/// 滚动到底部停止
/// </summary>
Slide,
/// <summary>
/// 不停滚动
/// </summary>
Scroll,
}
/// <summary>
/// MarqueeControls 的摘要说明。
/// </summary>
[ToolboxBitmapAttribute(typeof(MarqueeControls), "MarqueeControls.bmp")]
[DefaultProperty("Text"),
ToolboxData("<{0}:MarqueeControls runat=server></{0}:MarqueeControls>")]
public class MarqueeControls:System.Web.UI.WebControls.WebControl
{
private String _defaultContent;
private MarqueeDirection _dir;
private ListStyle _listStyle;
private bool _enableLink;
private string _prehref;
private LinkTarget _target;
private int _loop;
private int _delay;
private ScrollBehavior _havior;
private FloatStyle _float;
[Browsable(true)]
[Description("列表浮动样式!")]
[DefaultValue(FloatStyle.None)]
public FloatStyle Float
{
get
{
return this._float;
}
set
{
this._float=value;
}
}
[Browsable(true)]
[Description("滚动的行为!")]
[DefaultValue(ScrollBehavior.Scroll)]
public ScrollBehavior MyHavior
{
get
{
return this._havior;
}
set
{
this._havior=value;
}
}
[Browsable(true)]
[Description("滚动延迟的时间!")]
[DefaultValue(50)]
public int Delay
{
get
{
return this._delay;
}
set
{
this._delay=value;
}
}
[Browsable(true)]
[Description("滚动的次数,-1无限循环")]
[DefaultValue(-1)]
public int Loop
{
get
{
return this._loop;
}
set
{
if(value<-1)
{
throw new ArgumentException("loop参数不得小于-1");
}
this._loop=value;
}
}
[Browsable(true)]
[Description("链接目标")]
[DefaultValue(LinkTarget.Blank)]
public LinkTarget Target
{
get
{
return this._target;
}
set
{
if(this.EnableLink)
{
this._target=value;
}
else
{
throw new ArgumentException("请先设置EnableLink属性为true");
}
}
}
[Browsable(true)]
[Description("默认链接前缀")]
public string PreHref
{
get
{
return this._prehref;
}
set
{
this._prehref=value;
}
}
public MarqueeControls()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
[Browsable(true)]
[Description("是否打开链接")]
[DefaultValue(false)]
public bool EnableLink
{
get
{
return this._enableLink;
}
set
{
this._enableLink=value;
}
}
/// <summary>
/// 公告列表的样式
/// </summary>
[Browsable(true)]
[Description("公告列表的样式!")]
[DefaultValue(ListStyle.Circle)]
public ListStyle MyStyle
{
get
{
return this._listStyle;
}
set
{
this._listStyle=value;
}
}
/// <summary>
/// 公告滚动的方向
/// </summary>
[Browsable(true)]
[Description("公告滚动的方向!")]
[DefaultValue(MarqueeDirection.Down)]
public MarqueeDirection Direction
{
get
{
return this._dir;
}
set
{
this._dir=value;
}
}
/// <summary>
/// 默认没有公告时候显示的内
/// </summary>
[Browsable(true)]
[Description("默认没有公告时候显示的内容!")]
[DefaultValue("当前没有公告!")]
public String DefaultContent
{
get
{
if(this._defaultContent==string.Empty)
{
throw new ArgumentException("必须设置默认公告的内容!");
}
return this._defaultContent;
}
set
{
this._defaultContent=value;
}
}
/// <summary>
/// 需要显示的公告数组
/// </summary>
[Browsable(false)]
[Description("需要显示的公告数组")]
public Hashtable Content
{
get
{
if(ViewState["content"]==null)
{
//ViewState["content"]=this.DefaultContent;
//ViewState["content"]=new string[]{this.DefaultContent};
return null;
}
//string[] array=ViewState["content"].ToString().Split('-');
Hashtable array=ViewState["content"] as Hashtable;
return array;
}
set
{
ViewState["content"]=value;
// StringBuilder sb=new StringBuilder();
// foreach(string str in value)
// {
// sb.Append(str+"-");
// }
// ViewState["content"]=sb.ToString().TrimEnd('-');
}
}
protected override void OnPreRender(EventArgs e)
{
foreach(string key in this.Style.Keys)
{
this.Attributes.Add(key,this.Style[key]);
}
base.OnPreRender (e);
}
protected override void Render(HtmlTextWriter writer)
{
//writer.RenderBeginTag(HtmlTextWriterTag.Div);
// foreach(string key in this.Style.Keys)
// {
// writer.AddAttribute(key,this.Style[key]);
// }
//writer.Write(string.Format("<div style='width:{0};height:{1}'>",new object[]{this.Width,this.Height}));
//writer.
writer.Write(this.FormatContent());
//writer.RenderEndTag();
//base.Render (writer);
//writer.Write("</div>");
}
private const string ConstString="<marquee direction=\"{0}\" behavior=\"{5}\" scrollDelay=\"{3}\" loop=\"{4}\" onmouseover=\"this.stop();\" onmouseout=\"this.start();\"><ul style=\"LIST-STYLE-TYPE: {1}\">{2}</ul></marquee>";
private const string LiString="<li style=\"float:{1}\">{0}</li>";
private const string LiAndLinkStr="<li style=\"float:{3}\"><a href='{0}' target='_{1}'>{2}</a></li>";
private string FormatContent()
{
StringBuilder sb=new StringBuilder();
if(this.Content!=null)
{
// for(int i=0;i<this.Content.Count;i++)
// {
// sb.AppendFormat(LiString,this.Content[i]);
// }
if(this.EnableLink)
{
foreach( DictionaryEntry de in this.Content )
{
sb.AppendFormat(LiAndLinkStr,new object[]{this.PreHref+de.Key.ToString(),this.Target,de.Value,this.Float});
//Console.WriteLine("Key = {0}, Value = {1}", de.Key, de.Value);
}
}
else
{
foreach( DictionaryEntry de in this.Content )
{
sb.AppendFormat(LiString,new object[]{de.Value,this.Float});
}
}
return string.Format(ConstString,new object[] {this.Direction,this.MyStyle,sb.ToString(),this.Delay,this.Loop,this.MyHavior});
}
else
{
return this.DefaultContent;
}
}
}
}
使用方式:
string [] test=new string[]{"one","two"};
Hashtable hs=new Hashtable();
foreach(string str in test)
{
hs.Add(str,str);
}
this.MarqueeControls1.Content=hs;
或者数据库中取数据出来放到Hashtable中,当然可以扩展数据源为object对象
