sample1.cs

C#函数手册

namespace apibook
{
	using System;
	using System.IO;
	using System.Data;
	public class TestConstraintClass 
	{ 
		public static void Main()
		{
			DataTable testDT=new DataTable("student");
			DataColumn testDC;			
			testDC = new DataColumn();
			testDC.DataType = Type.GetType("System.Int32");
			testDC.Unique=true;
			testDC.ColumnName="Id";
			testDT.Columns.Add(testDC);
			testDC = new DataColumn();
			testDC.DataType = Type.GetType("System.String");
			testDC.ColumnName = "Name";
			testDC.Unique=true;
			testDT.Columns.Add(testDC);					   Console.WriteLine("表名：" + testDT.TableName);
			foreach(Constraint testC in testDT.Constraints ) 
			{				
				Console.WriteLine("约束信息： " + testC.ToString());
				//使用ToString方法获取 ConstraintName作为字符串
				Console.WriteLine("约束类型："+
					testC.GetType().ToString());				   }
			Console.ReadLine();
		}
	}
}