我无法访问对象 [英] Im not able to access an object

问题描述

这是我的Configuration.cs代码

 命名空间 DataAccess
{
    公共 类连接
    {
        公共 静态 Social_NetwokingEntities GetContext()
        {
            Social_NetwokingEntities fdc = 新 Social_NetwokingEntities(ConfigurationManager.ConnectionStrings [" ].ToString());
            返回 fdc；
        }
    }
} 

使用该文件的另一个文件的代码是:

 私有连接conn；

        公共 AccountRepository()
        {
            conn = 新 Connection();
        }

         
        公共帐户GetAccountByID( int  AccountID)
        {
            帐户account = 空；
            使用(Social_NetwokingEntities dc = conn.GetContext())
            {
                account =(来自 dc中的>帐户选择 a).First();
            }
            返回帐户；
        } 

当我使用(Social_NetworkingEntities dc = conn.GetContext())键入

 实例，请使用一种类型对其进行限定.

我不明白是什么问题..

请帮帮我.



谢谢.
解决方案
 
我知道这不是您问题的答案，但希望您知道您的Linq语句可以大大改善:



account = dc.Account.FirstOrDefault(i => i.AccountID == AccountID); 



不确定您真正的问题是什么.
 
 
原因是在Class  
中
 公共  class 连接
    {
        公共 静态 Social_NetwokingEntities GetContext()
        {
            Social_NetwokingEntities fdc = 新 Social_NetwokingEntities(ConfigurationManager.ConnectionStrings [" ].ToString());
            返回 fdc；
        }
    } 
 

GetContext 被声明为static 方法，因此可以通过Type Connection  而不是通过类Connection的instance进行访问.因此，将显示以上错误消息.

此外，我认为下面的代码可能足以代替问题中提到的第二个代码块

 公共帐户GetAccountByID( int  AccountID)
{
    使用(Social_NetwokingEntities dc = Connection.GetContext())
    {
        返回 dc.Accounts.FirstOrDefault(a = >  a.AccountID == AccountID);
    }
} 
 
 
 
Hi,



This is my code for Configuration.cs



namespace DataAccess
{
    public class Connection
    {
        public static Social_NetwokingEntities GetContext()
        {
            Social_NetwokingEntities fdc = new Social_NetwokingEntities(ConfigurationManager.ConnectionStrings["FisharooConnectionString"].ToString());
            return fdc;
        }
    }
}




and the code for another file using this file is :

private Connection conn;

        public AccountRepository()
        {
            conn=new Connection();
        }

         
        public Accounts GetAccountByID(int AccountID)
        {
            Accounts account = null;
            using (Social_NetwokingEntities dc = conn.GetContext())
            {
                account = (from a in dc.Accounts where a.AccountID == AccountID select a).First();
            }
            return account;
        }




when i type
using(Social_NetworkingEntities dc = conn.GetContext()) 
i get an error "cannot be accessed by an instance, qualify it with a type.

i dont understand what is the problem..

please help me.



Thank you.
解决方案
I know this is not the answer to your question, but wanted you to know that your Linq statement could be much improved:



account = dc.Account.FirstOrDefault(i => i.AccountID == AccountID);



Not sure what your real problem is though.

The reason is that in the Class 

public class Connection
    {
        public static Social_NetwokingEntities GetContext()
        {
            Social_NetwokingEntities fdc = new Social_NetwokingEntities(ConfigurationManager.ConnectionStrings["FisharooConnectionString"].ToString());
            return fdc;
        }
    }


the GetContext is declared as a static method, so it can be accessed through the Type Connection  and not through the instance of the class Connection.  Hence, the above error message is displayed.

Further, I think the following code may suffice instead of the second code block mentioned in the question

public Accounts GetAccountByID(int AccountID)
{
    using (Social_NetwokingEntities dc = Connection.GetContext())
    {
        return dc.Accounts.FirstOrDefault(a => a.AccountID == AccountID);
    }
}


                        
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