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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 }