sample5.cs

C#函数手册

namespace apiBook
{
	using System;
	using System.Data;
	public class TestClass 
	{ 
		public static void Main()
		{
			TestClass test=new TestClass();			
			DataTable testDT=new DataTable("student");
			DataTable testDT1=new DataTable("class");			  
			DataColumn testDC;			
			testDC = new DataColumn();
			testDC.DataType = Type.GetType("System.Int32");		  
			testDC.ColumnName="Id";
			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.Int32");		 
			testDC.ColumnName="sId";
			testDT1.Columns.Add(testDC);
			testDC = new DataColumn();
			testDC.DataType = Type.GetType("System.String");
			testDC.ColumnName = "Grade";	
			testDT1.Columns.Add(testDC);		
			DataColumn pDC;
			DataColumn cDC;
			pDC = testDT.Columns["Id"];
			cDC = testDT1.Columns["sId"];
			DataRelation testDR;
			testDR = new DataRelation("StudentOrder", pDC, cDC);
			//使用构造函数创建对象
			Console.WriteLine("DataRelation(\"StudentOrder\",\"Id\",\"sId\")="+testDR.ToString());
			//使用ToString方法获取RelationName属性值
			testDR=new DataRelation(
				"GradeOrder",testDT.Columns["Name"],
				testDT1.Columns["Grade"]);
			Console.WriteLine("DataRelation(\"GradeOrder\",\"Name\",\"Grade\")="+testDR.ToString());
			Console.ReadLine();
		}		
	}
}