表单提交时,更新的操作

Posted 2021-03-20 jiangyunfeng

 //原程序的写法,意思就是,先查出数据库里面的记录,然后用提交过来的数据进行覆盖数据库里面的值,调用的方法是SetAttribute

public IActionResult UpdateSaleAfterDTID(int id, string proname, string isupdate, IFormCollection values, int orderid)
        {
            if (!string.IsNullOrEmpty(isupdate))
            {
                //表单提交时触发事件
                var fchelpAdd = new FormConfigHelp(db, Url);
                var AllConfigs = fchelpAdd.GetBodies(RouteData, "MainForm1");
                var cvalue = values.Where(p => AllConfigs.Where(q => q.ClassName == "Model.SFSaleAfterDT").Select(q => q.ControlID).Contains(p.Key)).ToList();

                var SFSaleAfterDTID = Convert.ToInt32(values["SaleAfterDTID"]);
                var sfdt = db.SFSaleAfterDT.Where(p => p.SaleAfterDTID == SFSaleAfterDTID).FirstOrDefault();
                fchelpAdd.SetAttribute(sfdt, cvalue);

                db.SaveChanges();
                PageContext.RegisterStartupScript(ActiveWindow.GetHideRefreshReference());
                return UIHelper.Result();

            }
}

public void SetAttribute(object model, List<KeyValuePair<string, Microsoft.Extensions.Primitives.StringValues>> values)
        {
            var entityEntry = db.Entry(model);
            foreach (var item in values)
            {
                var DateValue = entityEntry.Property(item.Key);
                if (item.Value.ToString() == "")
                {
                    DateValue.CurrentValue = null;
                }
                else if (DateValue.Metadata.ClrType.ToString().Contains("String"))
                {
                    DateValue.CurrentValue = item.Value.ToString();
                }
                else if (DateValue.Metadata.ClrType.ToString().Contains("Decimal"))
                {
                    DateValue.CurrentValue = Convert.ToDecimal(item.Value);
                }
                else if (DateValue.Metadata.ClrType.ToString().Contains("Int32"))
                {
                    int value;
                    if (item.Value.ToString().ToLower() == "false")
                    {
                        value = 0;
                    }
                    else if (item.Value.ToString().ToLower() == "true")
                    { value = 1; }
                    else { value = Convert.ToInt32(item.Value); }
                    DateValue.CurrentValue = value;
                }
                else if (DateValue.Metadata.ClrType.ToString().Contains("Int64"))
                {
                    long value;
                    if (item.Value.ToString().ToLower() == "false")
                    {
                        value = 0;
                    }
                    else if (item.Value.ToString().ToLower() == "true")
                    { value = 1; }
                    else { value = Convert.ToInt64(item.Value); }
                    DateValue.CurrentValue = value;
                }
                else if (DateValue.Metadata.ClrType.ToString().Contains("DateTime"))
                {
                    DateValue.CurrentValue = Convert.ToDateTime(item.Value);
                }
                else if (DateValue.Metadata.ClrType.ToString().Contains("Boolean"))
                {
                    DateValue.CurrentValue = Convert.ToBoolean(item.Value);
                }
                else if (DateValue.Metadata.ClrType.ToString().Contains("Double"))
                {
                    DateValue.CurrentValue = Convert.ToDouble(item.Value);
                }
                else
                {
                    string a = DateValue.Metadata.ClrType.ToString();
                }
            }
        }

下面是我的写法,直接把提交过来的数据创建成一个类,然后查数据库里面的数据,进行对比,如果数据库里的字段有值,创建的类的字段没有值,那么就把数据库里的值覆盖到创建的类的字段里,然后用创建的类去更新数据库,用的方法是JyfUpdateModel.updateModel

public IActionResult btnUpdateSFAccessoryGrid_Click(IFormCollection values, SFAccessory sfacc, string orderid, string isupdate, string rowIndex, string U9ID,int fnrid)
{

     var dbAcModel = db.SFAccessory.Find(sfacc.AccessoryID);
     db.Entry(dbAcModel).State = EntityState.Detached;//不跟踪数据库里查出来的类
    JyfUpdateModel.updateModel(dbAcModel,sfacc);
     db.Update(sfacc);
     db.SaveChanges();
}


/// <summary>　　　　　　　　　　　　　　　　　　　　　　　　　
    ///创建人：咖啡无眠
    ///日 期：2019/12/23
    ///描 述：更新实体,与数据库实体进行对比
    /// </summary>
    public class JyfUpdateModel
    {
        public static void updateModel(object dataBaseObj, object newObj)
        {
            Type t = dataBaseObj.GetType();
            //3.2.3?获取实体类所有的公共属性??
            List<PropertyInfo> propertyInfos = t.GetProperties(BindingFlags.Instance | BindingFlags.Public).ToList();
            //3.2.4?创建实体属性字典集合??
            Dictionary<string, PropertyInfo> dicPropertys = new Dictionary<string, PropertyInfo>();
            //3.2.5?将实体属性中要修改的属性名?添加到字典集合中??键：属性名??值：属性对象??
            propertyInfos.ForEach(p =>
            {
                dicPropertys.Add(p.Name, p);
            });

            Type t2 = newObj.GetType();
            foreach (var item in t2.GetProperties(BindingFlags.Instance | BindingFlags.Public).ToList())
            {
                if (dicPropertys.Keys.Contains(item.Name))
                {
                    try
                    {
                        if (item.GetValue(newObj) == null && dicPropertys[item.Name].GetValue(dataBaseObj) != null)
                        {
                            item.SetValue(newObj, dicPropertys[item.Name].GetValue(dataBaseObj));
                        }

                    }
                    catch (Exception ex)
                    {
                        throw;
                    }
                }
            }
        }

    }