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我在我的 .NET 站点中使用 3 层架构。目前在我的 DAL（数据访问层）中，我有 Load、Update、Insert 和 Delete，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。

下面是我的load，位于我的数据访问层中insertgetByEmailAddress

 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;
        }
    }

加载和插入非常标准并且可以正常工作。但是getByEmailAddress没有正确配置。我尝试混合加载和插入中的代码，但没有成功。谁能给我一个提示，想法或可以解决此问题的东西，以便我可以使用getByEmailAddress

顺便说一句，该函数应该命中一个存储过程，该过程通过发送任何 emailAddress 输入来收集所有信息。

提前致谢！

4

2 回答 2

4

您的业​​务层正在为 GetByEmailAddress 返回一个 DataTable，但您的数据访问层正在为 GetByEmailAddress 返回一个 int。你不想在你的 DAL 中：

public DataTable GetByEmailAddress(AdministratorsBO administrator)

并且返回更改为：

return dSet.Tables["AdministratorsTable"];
于 2011-03-23T01:37:17.577 回答
1

从您的业务层引用您应该返回数据表而不是整数

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];
    }
}
于 2011-03-23T01:38:24.597 回答