代码段：实现 SpecificFinder

上次修改时间： 2010年4月19日

适用范围： SharePoint Server 2010

本文内容
.NET 连接程序集的示例
ASP.NET Web 服务的示例
WCF 服务的示例
其他代码示例

以下代码示例演示如何在 .NET 连接程序集和 Web 服务中实现 SpecificFinder 方法实例。

.NET 连接程序集的示例

public Customer GetCustomerByID(String id)
{
    foreach (Customer customer in customers)
    {
        if (customer.CustomerID.Equals(id) && !customer.IsDeleted)
        {
            return customer;
        }
    }

    throw new ArgumentOutOfRangeException("id", "Customer not found");
}   

ASP.NET Web 服务的示例

[WebMethod]
public Customer GetCustomerByID(String id)
{
    foreach (Customer customer in customers)
    {
        if (customer.CustomerID.Equals(id) && !customer.IsDeleted)
        {
            return customer;
        }
    }

    throw new ArgumentOutOfRangeException("id", "Customer not found");
}

WCF 服务的示例

下面的代码演示服务约定接口中的操作定义。

[OperationContract]
Customer GetCustomerByID(string id);

下面的示例演示方法实例的实现。

public Customer GetCustomerByID(String id)
{
    foreach (Customer customer in customers)
    {
        if (customer.CustomerID.Equals(id) && !customer.IsDeleted)
        {
            return customer;
        }
    }

    throw new ArgumentOutOfRangeException("id", "Customer not found");
}

其他代码示例

1. 外部系统 - 数据库/SQL Server

   例如，对于 Microsoft SQL Server 数据库中的 Contact 实体，SpecificFinder 方法的外观可能与以下内容类似。

   public static Contact ReadItem(int contactID)
   {
       const string ServerName = "MySQLServerName";
       AdventureWorksDataContext dataContext = new AdventureWorksDataContext
             ("Data Source=" + ServerName + ";" +
              "Initial Catalog=AdventureWorks;Integrated Security=True");
   
       Contact Contact =
           (from contacts in dataContext.Contacts.AsEnumerable()
            where contacts.ContactID == contactID
            select contacts).Single();
       return Contact;
   }
   

2. 外部系统 - 平面文件

   public static IEnumerable<FlatFileEntity> ReadList()
   {
       List<FlatFileEntity> flatFileEntityList = new List<FlatFileEntity>();
       TextReader textReader = 
           new StreamReader(@"c:\data\flat-file-data-source.txt");
       string row;
   
       while ((row = textReader.ReadLine()) != null)
       {
           FlatFileEntity flatFileEntity = new FlatFileEntity();
   
           string[] entityData = row.Split(',');
   
           flatFileEntity.ID = entityData[0];
           flatFileEntity.Company = entityData[1];
           flatFileEntity.FirstName = entityData[2];
           flatFileEntity.LastName = entityData[3];
           flatFileEntity.Address = entityData[4];
           flatFileEntity.City = entityData[5];
           flatFileEntity.State = entityData[6];
           flatFileEntity.ZipCode = entityData[7];
           flatFileEntity.Phone = entityData[8];
           flatFileEntity.LastUpdated = DateTime.Parse(entityData[9]);
           flatFileEntityList.Add(flatFileEntity);
       }
   
       textReader.Close();
   
       foreach (FlatFileEntity entity in flatFileEntityList)
       {
           if (entity.ID == id)
               return entity;
       }
       return null;
   }
   

请参阅

概念

实现 SpecificFinder