[SharePoint v2]新闻列表Webpart

在ascx中写的，通过smartpart挂载。

  1namespace Genersoft.OA.Protal.EipWeb
  2{
  3    using System;
  4    using System.Data;
  5    using System.Drawing;
  6    using System.Web;
  7    using System.Web.UI;
  8    using System.Web.UI.WebControls;
  9    using System.Web.UI.HtmlControls;
 10    using System.Text;
 11    using System.Collections;
 12
 13    using Microsoft.SharePoint;
 14    using Microsoft.SharePoint.Portal;
 15    using Microsoft.SharePoint.WebControls;
 16    using Microsoft.SharePoint.Portal.SiteData;
 17    using Microsoft.SharePoint.Portal.WebControls;
 18    using Microsoft.SharePoint.Portal.Security;
 19    using Microsoft.SharePoint.Portal.Topology;
 20
 21    using tag = System.Web.UI.HtmlTextWriterTag;
 22    using attr = System.Web.UI.HtmlTextWriterAttribute; 
 23
 24    
 25    [System.ComponentModel.Description("新闻列表部件")]
 26    public class EipListNews : System.Web.UI.UserControl
 27    {
 28        "variable definiens"#region "variable definiens"
 29        private string _areaGuids = "";
 30        private string strLog = "";
 31        #endregion
 32
 33        "public properties"#region "public properties"
 34
 35        [System.ComponentModel.Browsable(true),
 36        System.ComponentModel.DefaultValue("guid以逗号分割"),
 37        System.ComponentModel.Description("Area's Guid for display")]
 38        public string AreaGuids 
 39        {
 40            get { return _areaGuids; }
 41            set { _areaGuids = value; } 
 42        }
 43
 44        #endregion
 45
 46        "PageLoad"#region "PageLoad"
 47        private void Page_Load(object sender, System.EventArgs e)
 48        {
 49            // 在此处放置用户代码以初始化页面
 50        }
 51        #endregion
 52
 53        "生成新闻列表html"#region "生成新闻列表html"
 54        protected override void Render(HtmlTextWriter writer)
 55        {  
 56             
 57            try
 58            {
 59                if( _areaGuids.IndexOf(",")!= -1)
 60                {
 61                    string [] tempAreaGuids = _areaGuids.Split(',');
 62            
 63                    for (int i=0;i<tempAreaGuids.Length;i++)
 64                    {
 65                        if(tempAreaGuids[i] != "" )
 66                        {
 67                            Area tempArea = GetAreaFromGuidOrPath(tempAreaGuids[i]);
 68                            if(tempArea != null)
 69                            {
 70                                ArrayList al = new ArrayList();
 71                                GetAllAreasListings(ref al,tempArea,1);
 72                                writer.Write(RenderHtml(tempArea,al));
 73                                //writer.RenderBeginTag(tag.Br);
 74                                //writer.RenderEndTag();
 75                            }
 76                        } 
 77                    } 
 78                }
 79                else
 80                {
 81                    writer.Write("您还没有设置要显示的新闻区域，点此设置！");//让用户点击直接打开ToolPart
 82                }
 83            }
 84            catch(Exception ex)
 85            {
 86                writer.Write(strLog+=ex.Message);
 87            }
 88        }
 89        #endregion
 90
 91        "递归动态获取新闻列表ArrayList"#region "递归动态获取新闻列表ArrayList"
 92        private void GetAllAreasListings(ref ArrayList al,Area currentArea,int runone)
 93        {  
 94            if(runone == 1)//新闻父区域
 95            {
 96                AreaListingCollection list = currentArea.Listings;
 97                for(uint i=0;i<list.Count;i++)
 98                {
 99                    al.Add(list[i]);
100                } 
101                runone++;
102                GetAllAreasListings(ref al,currentArea,runone);
103            }
104            else//新闻子区域
105            {
106                foreach(Area onearea in currentArea.Areas)
107                {
108                    AreaListingCollection list = onearea.Listings; 
109                    for(uint i=0;i<list.Count;i++)
110                    {
111                        al.Add(list[i]);
112                    } 
113                    GetAllAreasListings(ref al,onearea,runone);
114                }
115            }
116            al.Sort(new AreaListingComparer());  
117        } 
118        #endregion 
119
120        "根据Guid获取新闻区域"#region "根据Guid获取新闻区域"
121        /**//// <summary>
122        /// Get current Area by Guid or areaNavigationPath
123        /// </summary>
124        /// <param name="GuidOrPath">GuidOrPath</param>
125        /// <returns>Area</returns>
126        public Area GetAreaFromGuidOrPath(string GuidOrPath)
127        {    
128            Area homeArea = null;
129            string curAreaName="";
130            try
131            {
132                if(GuidOrPath.StartsWith("http://"))
133                {
134                    string startUrl=GetPortalURL(GuidOrPath);    
135
136                    Uri siteUri = new Uri(startUrl);
137                    TopologyManager tm = new TopologyManager();
138                    PortalSite site = tm.PortalSites[siteUri];
139                    PortalContext portalContext = PortalApplication.GetContext(site);
140                    Guid homeGuid = AreaManager.GetSystemAreaGuid(portalContext, SystemArea.Home);
141                    homeArea = AreaManager.GetArea(portalContext, homeGuid);
142                
143                    string areaName=getNextSectionInUrl(GuidOrPath,startUrl).Trim(); 
144                    while (areaName!="")
145                    {
146                        homeArea=homeArea.Areas[areaName];
147                        startUrl+="/"+areaName;
148                        curAreaName=areaName;
149                        areaName=getNextSectionInUrl(GuidOrPath,startUrl).Trim();
150                    }
151                }
152                else 
153                {
154                    homeArea = AreaManager.GetArea(PortalContext.Current,new Guid(GuidOrPath));
155                }
156                if (homeArea==null)
157                {
158                    strLog+="Can't find the area ("+curAreaName+") in the URL "+GuidOrPath+";\n";
159                    strLog+="GetAreaFromURL leave:\n";
160                    return null;
161                }
162                strLog+="GetAreaFromURL leave:\n";
163                return homeArea;
164            }
165            catch (Exception ex)
166            {
167                strLog+=ex.Source+"====="+ex.Message+"\n";
168                strLog+="GetAreaFromURL leave:\n";
169                return null;
170            }
171
172        }  
173
174        /**//// <summary>
175        /// Get the portal's URL from the siteURL. Because it includes "http://" and the content between this and the next "/"
176        /// </summary>
177        /// <param name="siteUrl">sitUrl</param>
178        /// <returns>String</returns>
179        private string GetPortalURL(string siteUrl)
180        {
181            strLog+="GetPortalURL enter:\n";
182            strLog+="siteUrl="+siteUrl+"\n";
183            string tempStr=siteUrl;
184            int tempPos;    
185            tempPos=tempStr.IndexOf("/",7);
186            if (tempPos<0)
187            {
188                tempPos=tempStr.Length;
189            }
190            tempStr=tempStr.Substring(0,tempPos);
191            strLog+="GetPortalURL leave:\n";
192            return tempStr;
193        }
194
195        /**//// <summary>
196        /// from the sourceUrl, get the section between startUrl and the next "/", for example, sourceUrl=http://sean/url1/url2,startUrl=http://sean, return result=url1
197        /// </summary>
198        /// <param name="sourceUrl">sourceUrl</param>
199        /// <param name="startUrl">startUrl</param>
200        /// <returns>String</returns>
201        private string getNextSectionInUrl(string sourceUrl,string startUrl)
202        {
203            strLog+="getNextSectionInUrl enter:\n";
204            strLog+="sourceUrl="+sourceUrl+"\nstartUrl="+startUrl+"\n";
205            string resultStr="";
206            if ((sourceUrl==null)||(startUrl==null)||(sourceUrl.Trim()=="")||(startUrl.Trim()==""))
207            {
208                strLog+="sourceUrl or startUrl is null or empty";
209                strLog+="getNextSectionInUrl leave:\n";
210                return resultStr;
211            }
212            if (sourceUrl.Length<=startUrl.Length)
213            {
214                strLog+="sourceUrl must be longer than startUrl.\n";
215                strLog+="getNextSectionInUrl leave:\n";
216                return resultStr;
217            }
218            int tempIndex=sourceUrl.IndexOf("/",startUrl.Length+1);
219            if (tempIndex<=0)
220            { 
221                resultStr=sourceUrl.Substring(startUrl.Length+1);
222            }
223            else
224            {
225                resultStr=sourceUrl.Substring(startUrl.Length+1,tempIndex-startUrl.Length-1);
226            }
227            strLog+="resultStr="+resultStr+"\n";
228            strLog+="getNextSectionInUrl leave:\n";
229            return resultStr;
230        }
231 
232        #endregion
233
234        "构造展现新闻的HTML串"#region "构造展现新闻的HTML串" 
235        /**//// <summary>
236        /// 构造展现每个新闻模块的Html字符串 需要时可以放到属性里，让用户自行设置
237        /// </summary>
238        /// <param name="area"></param>
239        /// <param name="al"></param>
240        /// <returns></returns>
241        private string RenderHtml(Area area ,ArrayList al)
242        {
243            StringBuilder sb = new StringBuilder();
244            try
245            { 
246                sb.Append("<table width='490'border='0' cellspacing='0' cellpadding='0'> ");
247                sb.Append("        <tr>                                                                                                                                   ");
248                sb.Append("                <td width='4' height='4'><img src='/_layouts/images/lceip/01.jpg' width='4' height='4'></td>                                   ");
249                sb.Append("                <td width='4' background='/_layouts/images/lceip/02.jpg'></td>                                                                 ");
250                sb.Append("                <td width='4' height='4'><img src='/_layouts/images/lceip/03.jpg' width='4' height='4'></td>                                   ");
251                sb.Append("        </tr>                                                                                                                                  ");
252                sb.Append("        <tr>                                                                                                                                   ");
253                sb.Append("                <td width='4' background='/_layouts/images/lceip/04.jpg'></td>                                                                 ");
254                sb.Append("                <td height='50'valign='top'>                                                                                                   ");
255                sb.Append("                        <table cellspacing='0' cellpadding='0' border='0' width='470'>                                                         ");
256                sb.Append("                                <tr>                                                                                                           ");
257                sb.Append("                                   <td colspan='2' background='/_layouts/images/lceip/xwdh.jpg' height='40' align='right'>                    ");
258                sb.Append("                                                <font size='2'><a href='/News/default.aspx'>&gt;&gt;&gt;更多</a>&nbsp;&nbsp;&nbsp;</font></td> ");
259                sb.Append("                                </tr>                                                                                                          ");  
260                
261                for(int i=0;i<al.Count;i++)
262                { 
263                    string tempListTitle =((AreaListing)al[i]).Title.Length<23?((AreaListing)al[i]).Title:((AreaListing)al[i]).Title.Substring(0,23) + "…";
264                    sb.Append("                         <tr>                                                                                                           ");
265                    sb.Append("                                    <td  width='370' height='25' background='/_layouts/images/lceip/news_bg.jpg'>&nbsp;<img src='/_layouts/images/lceip/newshead.gif'>&nbsp;<a href='"+ ((AreaListing)al[i]).URL + "'>" + tempListTitle+"</a>");
266                    sb.Append("                                            <font color=DarkGray>["+((AreaListing)al[i]).CreationDate.ToShortDateString().Substring(2)+"]</font>");
267                    if(((AreaListing)al[i]).CreationDate >DateTime.Today)
268                    {
269                        sb.Append("&nbsp;&nbsp;<img border='0' src='/_layouts/images/lceip/new.gif'>                                                                   ");
270                    } 
271                    sb.Append("                                  </td>                                                                                                 ");
272                    sb.Append("                                  <td width='50' background='/_layouts/images/lceip/news_bg.jpg' align='right'>" +"<font color=DarkGray>"+ ((AreaListing)al[i]).CreatedBy.Substring(((AreaListing)al[i]).CreatedBy.LastIndexOf("\\")+1,((AreaListing)al[i]).CreatedBy.Length-((AreaListing)al[i]).CreatedBy.LastIndexOf("\\")-1)+"</font>");
273                    sb.Append("                                  </td>                                                                                                 ");
274                    sb.Append("                            </tr>                                                                                                          ");
275                } 
276
277                sb.Append("                     </table>                                                                                                               ");
278                sb.Append("             </td>                                                                                                                          ");
279                sb.Append("                <td background='/_layouts/images/lceip/06.jpg'></td>                                                                           ");
280                sb.Append("        </tr>                                                                                                                                  ");
281                sb.Append("     <tr>                                                                                                                                   ");
282                sb.Append("                <td width='4' height='4'><img src='/_layouts/images/lceip/07.jpg' width='4' height='4'></td>                                   ");
283                sb.Append("                <td background='/_layouts/images/lceip/08.jpg'></td>                                                                           ");
284                sb.Append("                <td width='4' height='4'><img src='/_layouts/images/lceip/09.jpg' width='4' height='4'></td>                                   ");
285                sb.Append("        </tr>                                                                                                                                  ");
286                sb.Append("</table>                                                                                                                                    "); 
287            }
288            catch(Exception ex)
289            {
290                strLog+= "error occur:" + ex.Message + "\n" ;
291            }
292            return sb.ToString(); 
293        } 
294
295        #endregion
296
297        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
298        override protected void OnInit(EventArgs e)
299        {
300            //
301            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
302            //
303            InitializeComponent();
304            base.OnInit(e);
305        }
306        
307        /**//// <summary>
308        ///        设计器支持所需的方法 - 不要使用代码编辑器
309        ///        修改此方法的内容。
310        /// </summary>
311        private void InitializeComponent()
312        {
313            this.Load += new System.EventHandler(this.Page_Load);
314        }
315        #endregion
316    }
317
318    "根据CreationDate进行倒叙排序"#region "根据CreationDate进行倒叙排序"
319    public class AreaListingComparer : IComparer 
320    { 
321        /**//// <summary>
322        /// First off, AreaListingCollection returns a collections of listings, not lists. They are different.
323        ///The collection is based on the IEnumerable interface so you can create an IComparable class to have it sort whatever way you want and call the    
324        /// </summary>
325        /// <param name="x"></param>
326        /// <param name="y"></param>
327        /// <returns></returns>
328        public int Compare(Object x, Object y) 
329        { 
330            if(((AreaListing)x).CreationDate > ((AreaListing)y).CreationDate) 
331            { 
332                return -1; 
333            } 
334            return 1; 
335        }  
336    } 
337    #endregion
338}
339