如果被允许使用LINQ，请看以下示例。它创建两个带有整数列的DataTable，用一些记录填充它们，使用LINQ查询将它们联接，并将它们输出到Console。
DataTable dt1 = new DataTable(); dt1.Columns.Add("CustID", typeof(int)); dt1.Columns.Add("ColX", typeof(int)); dt1.Columns.Add("ColY", typeof(int)); DataTable dt2 = new DataTable(); dt2.Columns.Add("CustID", typeof(int)); dt2.Columns.Add("ColZ", typeof(int)); for (int i = 1; i <= 5; i++) { DataRow row = dt1.NewRow(); row["CustID"] = i; row["ColX"] = 10 + i; row["ColY"] = 20 + i; dt1.Rows.Add(row); row = dt2.NewRow(); row["CustID"] = i; row["ColZ"] = 30 + i; dt2.Rows.Add(row); } var results = from table1 in dt1.AsEnumerable() join table2 in dt2.AsEnumerable() on (int)table1["CustID"] equals (int)table2["CustID"] select new { CustID = (int)table1["CustID"], ColX = (int)table1["ColX"], ColY = (int)table1["ColY"], ColZ = (int)table2["ColZ"] }; foreach (var item in results) { Console.WriteLine(String.Format("ID = {0}, ColX = {1}, ColY = {2}, ColZ = {3}", item.CustID, item.ColX, item.ColY, item.ColZ)); } Console.ReadLine();// Output:// ID = 1, ColX = 11, ColY = 21, ColZ = 31// ID = 2, ColX = 12, ColY = 22, ColZ = 32// ID = 3, ColX = 13, ColY = 23, ColZ = 33// ID = 4, ColX = 14, ColY = 24, ColZ = 34// ID = 5, ColX = 15, ColY = 25, ColZ = 35
