sample12.cs

C#函数手册

namespace apiBook
{
	using System;
	using System.Data;
	using System.IO;
	public class TestClass 
	{ 
		public static void Main()
		{
			TestClass test=new TestClass();
			DataTable testDT = new DataTable("student");
			DataColumn testDC = new DataColumn("Id",Type.GetType("System.Int32"));
			testDT.Columns.Add(testDC);
			testDC = new DataColumn("Name",Type.GetType("System.String"));
			testDT.Columns.Add(testDC);
			DataRow testDR;
			testDR=testDT.NewRow();
			testDR["Id"]=1;
			testDR["Name"]="Rose";
			testDT.Rows.Add(testDR);
			testDR=testDT.NewRow();
			testDR["Id"]=2;
			testDR["Name"]="Jock";
			testDT.Rows.Add(testDR);		
			testDT.AcceptChanges();
			DataView testDVA = new DataView(testDT);
			DataView testDVB = new DataView(testDT);
 
			testDVA.RowStateFilter=
				DataViewRowState.ModifiedOriginal ;
			test.DoPrint(testDVA,"第一个DataView对象（原始数据）");
			DataRowView testDRV;
			testDRV=testDVB.AddNew();
			//使用AddNew方法将新行添加到 DataView 中
			testDRV["Id"] = 8;
			testDRV["Name"] = "Bill";
			testDVB.RowStateFilter=
				DataViewRowState.ModifiedCurrent | 
				DataViewRowState.Added;
			test.DoPrint(testDVB, "第二个DataView对象（修改后数据）");
			Console.ReadLine();
		}
		private void DoPrint(DataView dv, string str)
		{
			Console.WriteLine(str);
			for(int i = 0; i<dv.Count;i++)
			{
				Console.WriteLine("  " + dv[i]["Id"]+"   "+dv[i]["Name"]);
			}
			Console.WriteLine();
		}
	}
}