SharePoint 列表多表联合查询

 1 string SiteUrl = Microsoft.SharePoint.SPContext.Current.Site.Url ;
 2         using (SPSite site = new SPSite(SiteUrl))
 3         {
 4             using (SPWeb web = site.OpenWeb("/Test"))
 5             {
 6                 SPQuery query = new SPQuery();
 7                 //Joins属性，这里有INNER和LEFT两种方式连接，均可查询，而且支持多表连接；
 8                 query.Joins = "<Join Type=‘INNER‘ ListAlias=‘City‘>" +
 9                               "<Eq>" +
10                               "<FieldRef Name=‘CityLook‘ RefType=‘ID‘/>" +
11                               "<FieldRef List=‘City‘ Name=‘ID‘/>" +
12                               "</Eq>" +
13                               "</Join>";
14 
15                  
16                 //设置关联的查阅项字段
17                 query.ProjectedFields = "<Field Name=‘CityDescription‘ Type=‘Lookup‘ List=‘City‘ ShowField=‘Description‘/>" +
18                                         "<Field Name=‘CityCode1‘ Type=‘Lookup‘ List=‘City‘ ShowField=‘Code‘/>";
19                 //设置需要显示的字段
20                 query.ViewFields = "<FieldRef Name=‘ID‘/>" +
21                                    "<FieldRef Name=‘Title‘/>" +
22                                    "<FieldRef Name=‘CityCode‘/>" +
23                                    "<FieldRef Name=‘CityLook‘/>" +
24                                    "<FieldRef Name=‘CityCode1‘/>" +
25                                    "<FieldRef Name=‘CityDescription‘/>";
26 
27                 //query.Query = "<Where><Eq><FieldRef Name=‘CityCode‘/><Value Type=‘Text‘>XM</Value></Eq></Where>";
28                 //查阅项查询，采用ID值进行查询
29                 query.Query = "<Where><Eq><FieldRef Name=‘CityLook‘ LookupId=‘TRUE‘/><Value Type=‘Lookup‘>4</Value></Eq></Where>";
30  
31                 SPList list = web.Lists["Address"];
32      
33                 SPListItemCollection items = list.GetItems(query);
34 
35                 foreach (SPListItem item in items)
36                 {
37                     SPFieldLookupValue CityLook = new SPFieldLookupValue(item["CityLook"].ToString());
38                     SPFieldLookupValue CityCode1 = new SPFieldLookupValue(item["CityCode1"].ToString());
39 
40                     string info = "ID：" + item.ID.ToString() +"；"+
41                                   "Title：" + item["Title"].ToString() + "；" +
42                                   "CityCode：" + item["CityCode"].ToString() + "；" +
43                                   "CityDescription：" + item["CityDescription"].ToString() + "；" +
44                                   "CityCode1：" + CityCode1.LookupValue + "[" + CityCode1.LookupId + "]" + "；" +
45                                   "CityLook：" + CityLook.LookupValue + "[" + CityLook.LookupId + "]";
46                     Response.Write(info + "<br />");
47                 }
48 
49                 //DataTable dtData = items.GetDataTable();
50                 //GridView1.DataSource = dtData;
51                 //GridView1.DataBind();
52             }
53         }