学步园

    BaseEditForm 提供数据添加与修改的窗体
   

    属性
    Info:修改时，从BaseListForm传来的信息对象
    TypeID:类别Id
    ParentID:信息的父对象

    保护的方法
    ShowErrorMessage:显示信息提示

    重载方法
    CreateListInstance:创建IList对象
    AddInfo:数据添加时处理
    ModifyInfo:数据修改时处理
    ValidateData:验证数据
    FillForm:将数据填充到窗体控件上
    ClearForm:清理窗体控件的值
    RegisterActiveControl:注册要激活的控件,Control数组是TabControl每一个TabPage中默认获得焦点的控件

    以下给出一个示例代码:

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
            try
            {
                ATProductType da = (ATProductType)DAFactory.CreateDA(typeof(ATProductType));
                //填充分类列表
                tcbType.TableName = TProductType._TableName;
                tcbType.TextField = TProductType._Name;
                tcbType.IdField = TProductType._Id;
                tcbType.ParentIdField = TProductType._ParentId;
                tcbType.ChildCountField = TProductType._ChildCount;
                tcbType.FillTypes(da.DataHelper, null);
                tcbType.Value = TypeID;

                //单位
                ATUnit uda = (ATUnit)DAFactory.CreateDA(typeof(ATUnit));
                TUnits units = uda.Select(TUnit._CompanyId + " = " + ContextArgs.Instance.CompanyId);
                units.Insert(0, new TUnit());
                cboUnit.DisplayMember = "Name";
                cboUnit.DataSource = units;
                cboUnit.Text = UnitName;
                da.Dispose();
            }
            catch (System.Exception e1)
            {
                Utility.ShowErrorMessage(e1.Message);
            }
        }

        /// <summary>
        /// 创建一个实体集合
        /// </summary>
        /// <param name="type"></param>
        protected override void CreateListInstance(Type type)
        {
            base.CreateListInstance(typeof(TProducts));
        }

        /// <summary>
        /// 将实体信息填充到窗体控件
        /// </summary>
        /// <param name="source"></param>
        protected override void FillForm(BaseModel source)
        {
            TProduct info = source as TProduct;
            txtCode.Text = info.Code;
            txtName.Text = info.Name;
            ctbPrice.Decimal = info.Price;
            txtSpec.Text = info.Spec;
            UnitName = info.Unit;
            TypeID = info.ProductTypeId;
        }

        /// <summary>
        /// 清理窗体控件的值
        /// </summary>
        protected override void ClearForm()
        {
            txtCode.Text = "";
            txtName.Text = "";
            txtSpec.Text = "";
            cboUnit.Text = "";
            txtCode.Focus();
        }

        /// <summary>
        /// 添加新的实体信息
        /// </summary>
        /// <returns></returns>
        protected override BaseModel AddInfo()
        {
            try
            {
                ATProduct da = (ATProduct)DAFactory.CreateDA(typeof(ATProduct));

                #region 检查以前删除的
                QueryBuilder qb = new QueryBuilder();
                qb.Append(QueryRelation.And, QueryCompare.Equal, TProduct._IsDelete, true);
                qb.Append(QueryRelation.And, QueryCompare.Equal, TProduct._CompanyId, ContextArgs.Instance.CompanyId);
                qb.Append(QueryRelation.And, QueryCompare.Equal, TProduct._Code, txtCode.Text);

                TProduct oldInfo = da.Get(qb, null);
                if (oldInfo != null)
                {
                    DialogResult dresult = Utility.ShowQuestionMessageEx("历史记录中存在相同编码的产品\"" + oldInfo.Name + "\",\n点击\"是\"恢复原来的资料,点击\"否\"删除原来的资料并创建新的。");
                    if (dresult == DialogResult.Yes)
                    {
                        //恢复
                        oldInfo.IsDelete = false;
                        da.DataHelper.ExecuteNonQuery("UPDATE TProduct SET IsDelete = 0 WHERE " + qb.ToString());
                        return oldInfo;
                    }
                    else if (dresult == DialogResult.No)
                    {
                        //删除
                        da.DataHelper.ExecuteNonQuery("DELETE FROM TProduct WHERE " + qb.ToString());
                    }
                    else
                    {
                        return null;
                    }
                }
                #endregion

                TProduct info = da.NewEntity;
                SetInfo(info);
                if (da.Create(info))
                {
                    CreateUnit();
                    return info;
                }
            }
            catch (System.Exception e)
            {
                Utility.ShowErrorMessage(e.Message);
            }
            return null;
        }

        /// <summary>
        /// 修改实体信息
        /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        protected override bool ModifyInfo(BaseModel source)
        {
            try
            {
                TProduct info = source as TProduct;
                SetInfo(info);
                ATProduct da = (ATProduct)DAFactory.CreateDA(typeof(ATProduct));
                if (da.Update(info))
                {
                    CreateUnit();
                    return true;
                }
            }
            catch (System.Exception e)
            {
                Utility.ShowErrorMessage(e.Message);
            }
            return false;
        }

        /// <summary>
        /// 验证数据
        /// </summary>
        /// <returns></returns>
        protected override bool ValidateData()
        {
            bool ret = true;
            if (txtCode.Text.Length == 0)
            {
                ShowErrorMessage(txtCode, "请输入编码");
                ret = false;
            }
            if (txtName.Text.Length == 0)
            {
                ShowErrorMessage(txtName, "请输入名称");
                ret = false;
            }
            if (tcbType.Value == null)
            {
                ShowErrorMessage(tcbType, "请选择类别");
                ret = false;
            }
            try
            {
                //检查编码
                ATProduct da = (ATProduct)DAFactory.CreateDA(typeof(ATProduct));
                TProduct refer = Info == null ? null : (TProduct)Info;
                if (da.IsExist(refer, TProduct._Code, txtCode.Text, 
                    TProduct._CompanyId + " = " + ContextArgs.Instance.CompanyId + " AND " +
                    TProduct._IsDelete + " = 0"))
                {
                    ShowErrorMessage(txtCode, "编码重复");
                    ret = false;
                }
            }
            catch (System.Exception e)
            {
                Utility.ShowErrorMessage(e.Message);
            }
            return ret;
        }

        /// <summary>
        /// 将窗体控件的值赋给实体
        /// </summary>
        /// <param name="info"></param>
        private void SetInfo(TProduct info)
        {
            info.Code = txtCode.Text;
            info.Name = txtName.Text;
            info.Price = ctbPrice.Decimal;
            info.ProductTypeId = int.Parse(tcbType.Value.ToString());
            info.Unit = cboUnit.Text;
            info.Spec = txtSpec.Text;
            info.CompanyId = ContextArgs.Instance.CompanyId;
        }

        //添加单位
        private void CreateUnit()
        {
            string name = cboUnit.Text;
            ATUnit uda = (ATUnit)DAFactory.CreateDA(typeof(ATUnit));
            if (!uda.IsExist(TUnit._Name, name, TUnit._CompanyId + " = " + ContextArgs.Instance.CompanyId))
            {
                TUnit unit = new TUnit();
                unit.CompanyId = ContextArgs.Instance.CompanyId;
                unit.Name = name;
                uda.Create(unit);
            }
        }

    下一节介绍 BaseQueryForm 及相关的一些配置 
    http://www.cnblogs.com/faib/archive/2009/05/02/1447969.html