Question

我的DAL文件是

public class dalEmployeeInformation
{
    public string MyProperty_EmployeeID { get; set; }
    public string MyProperty_EmpFirstName { get; set; }
    public string MyProperty_EmpLastName { get; set; }

    public string MyProperty_Exception { get; set; }

    private DataSet dsEmployee =  new DataSet();
    public DataSet MyProperty_dsEmployee 
    {
        get { return dsEmployee; }
        set { dsEmployee = value; }
    }

    private DataTable dtEmployee = new DataTable();
    public DataTable MyProperty_dtEmployee
    {
        get { return dtEmployee;}
        set { dtEmployee = value; } 
    }

}

这就是我用它来保存

的方法

    public void AddEmployee(dalEmployeeInformation obj)
    {
        try
        {
            cmd.CommandText = "addEmployee";

            cmd.Parameters.AddWithValue("@EmpID", obj.MyProperty_EmployeeID);
            cmd.Parameters.AddWithValue("@FirstName", obj.MyProperty_EmpFirstName);
            cmd.Parameters.AddWithValue("@LastName", obj.MyProperty_EmpLastName);

            cmd.ExecuteNonQuery();
            cmd.Parameters.Clear();                               
        }
        catch (Exception ex)
        {
            obj.MyProperty_Exception = ex.Message;
        }
    }

这就是我用它来检索数据的方式。

    public dalEmployeeInformation ViewSelectedEmployee(dalEmployeeInformation obj)
    {
        try
        {
            cmd.CommandText = "getSelectedEmployeeInfo";

            cmd.Parameters.AddWithValue("@EmpID", obj.MyProperty_EmployeeID);
            ada.Fill(obj.MyProperty_dsEmployee , "SelectedEmployee");
            ada.Fill(obj.MyProperty_dtEmployee );
            return obj;

        }
        catch (Exception ex)
        {
            obj.MyProperty_Exception = ex.Message;
            return obj;
        }
    }

在form.cs

中

    private void AddEmployee()
    {
        blEmployeeInformation bl = new blEmployeeInformation();
        dalEmployeeInformation dal = new dalEmployeeInformation();
        dal.MyProperty_Exception = "";

        dal.MyProperty_EmployeeID = txtEmployeeID.Text;
        dal.MyProperty_EmpFirstName = txtEmpFirstName.Text;
        dal.MyProperty_EmpLastName = txtEmpLastName.Text;

        bl.AddEmployee(dal);

        if (dal.MyProperty_Exception == "")
        {
            MessageBox.Show("Employee Added Successfully");
        }
        else

        {
            MessageBox.Show("Employee not Added");
        }

    }

但是当我尝试调试它时会出现此错误信息

错误3类型或命名空间名称＆＃39; dalEmployeeInformation＆＃39;不能   找到（你错过了使用指令或汇编引用吗？）

错误2类型或命名空间名称＆＃39; blEmployeeInformation＆＃39;不能   找到（你错过了使用指令或汇编引用吗？）

Answer 1

右键单击解决方案资源管理器中的“参考”文件夹，然后单击“添加参考”，然后参考BL和DAL文件夹（项目）。

然后在form.cs文件中添加两行

using BL;
using DAL;

未找到BL类和DAL类

1 个答案: