【标题】：演示DataRowCollection类的使用
【关键字】：DataRowCollection
【来源】：http://blog.csdn.net/luchuanbo/archive/2006/12/19/1449662.aspx

演示DataRowCollection类的使用

（摘录自《C#函数实用手册》冶金工业出版社）
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            DataTable testDT = new DataTable("student");
            DataColumn testDC;
            DataColumn[] keys = new DataColumn[1];
            testDC = new DataColumn();
            testDC.DataType = Type.GetType("System.Int32");
            testDC.ColumnName = "ID";
            keys[0] = testDC;
            testDT.Columns.Add(testDC);
            testDC = new DataColumn();
            testDC.DataType = Type.GetType("System.String");
            testDC.ColumnName = "Name";
            testDT.Columns.Add(testDC);
            testDC = new DataColumn();
            testDC.DataType = Type.GetType("System.String");

testDC.ColumnName = "School";
testDT.Columns.Add(testDC);

            DataRow testDR = testDT.NewRow();
            testDR["ID"] = 1;
            testDR["Name"] = "Rose";
            testDR["School"] = "SCUT";
            testDT.Rows.Add(testDR);

            testDR = testDT.NewRow();
            testDR["ID"] = 2;
            testDR["Name"] = "Coke";
            testDR["School"] = "SCNU";
            testDT.Rows.Add(testDR);

            DataRowCollection testDRC;
            testDRC = testDT.Rows;

            testDR = testDT.NewRow();
            testDR["ID"] = 3;
            testDR["Name"] = "Mike";
            testDR["School"] = "SCUT";
            testDT.Rows.Add(testDR);

DoPrint(testDT);

            testDT.PrimaryKey = keys;
            Console.WriteLine("是否有ID为1的记录?" + testDRC.Contains("1"));
            Console.WriteLine("是否有ID为5的记录?" + testDRC.Contains("5"));
            testDR = testDRC.Find("2");
            Console.WriteLine("ID为2的记录:");
            foreach (DataColumn dc in testDT.Columns)
            {
                Console.Write(testDR[dc] + " ");
            }
            Console.WriteLine();
            Console.WriteLine("插入前表的数据:");
            DoPrint(testDT);
            Console.WriteLine("插入后表的数据:");
            testDR = testDT.NewRow();
            testDR[0] = 8;
            testDR[1] = "Nick";
            testDR[2] = "ZSU";
            testDRC.InsertAt(testDR, 1);
            DoPrint(testDT);

            Console.WriteLine("删除第一行记录:");
            testDRC.RemoveAt(0);
            DoPrint(testDT);
            Console.WriteLine("删除所有记录:");
            testDRC.Clear();
            DoPrint(testDT);
        }

        private static void DoPrint(DataTable tempDT)
        {
            Console.WriteLine("    " + tempDT.TableName + "表数据:");
            foreach (DataColumn dc in tempDT.Columns)
            {
                Console.Write(dc.ColumnName + "   ");
            }
            Console.WriteLine();
            foreach (DataRow dr in tempDT.Rows)
            {
                foreach (DataColumn dc in tempDT.Columns)
                {
                    Console.Write(dr[dc] + "    ");
                }
                Console.WriteLine();
            }
            Console.WriteLine("------------------------------\n");
        }
    }
}