ASP.NET C＃数据访问层功能问题

Question

我在.NET站点中使用3层体系结构。 目前，在我的DAL（数据访问层）中，我具有“加载”，“更新”，“插入”和“删除”功能，一切正常。 但是，我现在想创建一个函数来通过电子邮件地址获取数据。

以下是我的数据访问层中的load ， insert和getByEmailAddress

 public DataTable Load()
    {
        SqlConnection conn = new SqlConnection(MyGlobals.conString);
        SqlDataAdapter dAd = new SqlDataAdapter("administratorGetAll", conn);
        dAd.SelectCommand.CommandType = CommandType.StoredProcedure;
        DataSet dSet = new DataSet();
        try
        {
            dAd.Fill(dSet, "AdministratorsTable");
            return dSet.Tables["AdministratorsTable"];
        }
        catch
        {
            throw;
        }
        finally
        {
            dSet.Dispose();
            dAd.Dispose();
            conn.Close();
            conn.Dispose();
        }
    }

    /// <summary>
    /// Used to load records from database by email address
    /// </summary>
    public int GetByEmailAddress(AdministratorsBO administrator)
    {
        SqlConnection conn = new SqlConnection(MyGlobals.conString);
        SqlCommand dCmd = new SqlCommand("administratorGetByEmailAddress", conn);
        dCmd.CommandType = CommandType.StoredProcedure;
        DataSet dSet = new DataSet();
        try
        {
            dCmd.Parameters.AddWithValue("@emailAddress", administrator.EmailAddress);

            SqlDataAdapter dAd = new SqlDataAdapter(dCmd);

            dAd.Fill(dSet, "AdministratorsTable");
            return Convert.ToInt32(dSet.Tables["AdministratorsTable"]);
        }
        catch
        {
            throw;
        }
        finally
        {
            dSet.Dispose();
            conn.Close();
            conn.Dispose();
        }
    }

    /// <summary>
    /// Used to insert records into database
    /// </summary>
    public int Insert(AdministratorsBO administrator)
    {
        SqlConnection conn = new SqlConnection(MyGlobals.conString);
        conn.Open();
        SqlCommand dCmd = new SqlCommand("administratorInsert", conn);
        dCmd.CommandType = CommandType.StoredProcedure;
        try
        {
            dCmd.Parameters.AddWithValue("@userName", administrator.UserName);
            dCmd.Parameters.AddWithValue("@emailAddress", administrator.EmailAddress);
            dCmd.Parameters.AddWithValue("@password", administrator.Password);
            dCmd.Parameters.AddWithValue("@firstName", administrator.FirstName);
            dCmd.Parameters.AddWithValue("@lastName", administrator.LastName);
            dCmd.Parameters.AddWithValue("@isActive", administrator.IsActive);
            return dCmd.ExecuteNonQuery();
        }
        catch
        {
            throw;
        }
        finally
        {
            dCmd.Dispose();
            conn.Close();
            conn.Dispose();
        }
    }

接下来是我的业务访问层：

public DataTable Load()
    {
        AdministratorsDAL aDAL = new AdministratorsDAL();
        try
        {
            return aDAL.Load();
        }
        catch
        {
            throw;
        }
        finally
        {
            aDAL = null;
        }
    }

    /// <summary>
    /// Load records from database
    /// </summary>
    /// <returns></returns>
    public DataTable GetByEmailAddress(AdministratorsBO administrator)
    {
        AdministratorsDAL aDAL = new AdministratorsDAL();
        try
        {
            return aDAL.GetByEmailAddress(administrator);
        }
        catch
        {
            throw;
        }
        finally
        {
            aDAL = null;
        }
    }

    /// <summary>
    /// Insert records into database
    /// </summary>
    /// <param name="person"></param>
    public int Insert(AdministratorsBO administrator)
    {
        AdministratorsDAL aDAL = new AdministratorsDAL();
        try
        {
            return aDAL.Insert(administrator);
        }
        catch
        {
            throw;
        }
        finally
        {
            aDAL = null;
        }
    }

加载和插入是非常标准的工作。 但是， getByEmailAddress配置不正确。 我尝试从加载和插入中混合代码，但未成功。 谁能给我一个提示，想法或解决此问题的方法，以便我可以使用getByEmailAddress

顺便说一句，该功能应该命中一个存储过程，该存储过程通过发送任何emailAddress输入来收集所有信息。

提前致谢！

Answer 1

您的业​​务层正在为GetByEmailAddress返回一个数据表，但是您的数据访问层正在为GetByEmailAddress返回一个int。 您是否不想在DAL中使用：

public DataTable GetByEmailAddress(AdministratorsBO administrator)

并且返回值更改为：

return dSet.Tables["AdministratorsTable"];

Answer 2

从业务层引用，您应该返回一个数据表，而不是整数

public DataTable GetByEmailAddress(AdministratorsBO administrator)
{
    Using (SqlConnection conn = new SqlConnection(MyGlobals.conString))
    {
        SqlCommand dCmd = new SqlCommand("administratorGetByEmailAddress", conn);
        dCmd.CommandType = CommandType.StoredProcedure;
        DataSet dSet = new DataSet();

        dCmd.Parameters.AddWithValue("@emailAddress", administrator.EmailAddress);

        SqlDataAdapter dAd = new SqlDataAdapter(dCmd);

        dAd.Fill(dSet);
        return dSet.Tables[0];
    }
}