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 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Data;
 6 
 7 namespace DataSetConr
 8 {
 9     class Program
10     {
11 
12         public static void AddDataSetData(DataSet ds)
13         {
14             ds.Reset();
15             DataTable dt = new DataTable();
16             DataColumn dc = new DataColumn("guid", typeof(Guid));
17             DataColumn dc2 = new DataColumn("show", typeof(Boolean));
18             DataColumn dc3 = new DataColumn("isnull", typeof(Boolean));
19             dt.Columns.Add(dc); dt.Columns.Add(dc2); dt.Columns.Add(dc3);
20             DataRow dr = dt.NewRow();
21             dr.BeginEdit();
22             dr["guid"] = Guid.NewGuid();
23             dr["show"] = true;
24             dr["isnull"] = false;
25             dr.EndEdit();
26             dt.Rows.Add(dr);
27             ds.Tables.Add(dt);
28         }
29 
30         static void Main(string[] args)
31         {
32 
33             DataSet ds = new DataSet();
34             DataSet ds2 = new DataSet();
35             AddDataSetData(ds);
36             AddDataSetData(ds2);
37             foreach (DataRow item in ds.Tables[0].Rows)
38             {
39                 //查看A在B中是否存在
40                 DataRow[] rows = ds2.Tables[0].Select(string.Format("show={0} and isnull={1}",item["show"].ToString(),item["isnull"].ToString()));
41                 if (rows.Length==0)
42                 {
43                    
44                 }
45             }
46         }
47     }
48 }