Question

这里我试图通过Id获取数据请帮助我为什么我的代码写不出来

public IQueryable<Employee> GetEmployee(int id)
{
    Employee emp = new Employee();        
    using (SqlConnection con = db.Getconnection())
    {
        con.Open();
        SqlCommand cmd = new SqlCommand("Sp_GetEmployeeById", con);
        cmd.Parameters.AddWithValue("", id);
        cmd.CommandType = CommandType.StoredProcedure;
        SqlDataReader rdr = cmd.ExecuteReader();
        if (rdr.HasRows == true)
        {
            while (rdr.Read())
            {
                emp.Emp_Id = Convert.ToInt32(rdr["Emp_Id"]);
            }
            return emp;
        }

Answer 1

包括while和return的返回方面。这将解决您的问题。我也没有看到你在方法签名中返回IQueryable的原因。

public Employee GetEmployee(int id)
        {

            Employee emp = new Employee();

            using (SqlConnection con = db.Getconnection())
            {
                con.Open();
                SqlCommand cmd = new SqlCommand("Sp_GetEmployeeById", con);
                cmd.Parameters.AddWithValue("", id);
                cmd.CommandType = CommandType.StoredProcedure;
                SqlDataReader rdr = cmd.ExecuteReader();
                if (rdr.HasRows == true)
                {
                    while (rdr.Read())
                    {
                        emp.Emp_Id = Convert.ToInt32(rdr["Emp_Id"]);
                        emp.EmpName = rdr["EmpName"].ToString();
                        emp.Email = rdr["Email"].ToString();
                        emp.Cnt_Id = Convert.ToInt32(rdr["Cnt_Id"]);
                        }
                }    
        }
           return emp;
    }

缺少C＃IQueryable返回类型

1 个答案: