DAL.DS_Dept.DS_departmentRow()为何提示不包含“0”参数的构造函数？

我在业务逻辑层加入以下代码：
[System.ComponentModel.DataObjectMethodAttribute(System.ComponentModel.DataObjectMethodType.Insert, true)]
        public bool AddDept(string Department_id, string Department_name, string Department_director, string Department_superiorleading, int Department_depth, string Department_hypotaxis, string Department_juniordept)
        {
            FnWebOA.DAL.DS_Dept.DS_departmentDataTable Departments = new FnWebOA.DAL.DS_Dept.DS_departmentDataTable();
            FnWebOA.DAL.DS_Dept.DS_departmentRow Department = new FnWebOA.DAL.DS_Dept.DS_departmentRow();
            Department.department_id = Department_id;
            Department.department_name = Department_name;
                      Departments.AddDS_departmentRow(Department);
            int rowsAffected = departmentTableAdapter.Update(Departments);
            return rowsAffected == 1;
        }
系统提示FnWebOA.DAL.DS_Dept.DS_departmentDataTable()不包含“0”参数的构造函数
大家帮帮忙啊我用的是vs2008