简单工厂设计模式-设计模式(1)

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using System;

namespace iuhxq
{
 public abstract class DataProvider
 {
  public abstract string GetDataProvider();
 }

 public class OleDbDataProvider : DataProvider
 {
  public override string GetDataProvider()
  {
   return "OleDbDataProvider";
  }
 }

 public class SqlDataProvider : DataProvider
 {
  public override string GetDataProvider()
  {
   return "SqlDataProvider";
  }
 }

 public class DataProviderFactory
 {
  public static DataProvider GetDataProvider(string ProviderType)
  {
   if (ProviderType.ToLower() == "oledbdataprovider")
   {
    return new OleDbDataProvider();
   }
   else
   {
    return new SqlDataProvider();
   }
  }
 }

 public class Factory
 {
  public static void Main()
  {
   Console.WriteLine(DataProviderFactory.GetDataProvider("OleDbDataProvider").GetDataProvider());
  }
 }
}