107 lines
3.4 KiB
C#
107 lines
3.4 KiB
C#
using System.Collections;
|
||
using System.ComponentModel;
|
||
using System.Reflection;
|
||
using NewLife.Reflection;
|
||
using NewLife.Serialization;
|
||
using XCode;
|
||
|
||
namespace NewLife.Cube.ViewModels;
|
||
|
||
/// <summary>扩展字段。在表单页中，把一个Json/Xml字段扩展为多个字段进行展示和编辑</summary>
|
||
public class ExpandField
|
||
{
|
||
#region 属性
|
||
/// <summary>名称</summary>
|
||
public String Name { get; set; }
|
||
|
||
/// <summary>获取扩展字段委托。当前字段所表示的对象，各属性作为表单字段展开</summary>
|
||
public Func<Object, Object> Decode { get; set; }
|
||
|
||
/// <summary>编码扩展字段。一般是ToJson/ToXml</summary>
|
||
public Func<Object, Object> Encode { get; set; }
|
||
|
||
/// <summary>保留扩展字段。默认false，字段被扩展以后，表单上就不再出现原字段</summary>
|
||
public Boolean Retain { get; set; }
|
||
|
||
/// <summary>前缀</summary>
|
||
public String Prefix { get; set; }
|
||
|
||
/// <summary>分类</summary>
|
||
public String Category { get; set; }
|
||
#endregion
|
||
|
||
#region 扩展参数
|
||
/// <summary>当前字段集合加入目标对象作为扩展字段，用于动态表单</summary>
|
||
/// <param name="entity"></param>
|
||
/// <param name="parameter"></param>
|
||
public FieldCollection Expand(IEntity entity, Object parameter)
|
||
{
|
||
var fields = new FieldCollection(ViewKinds.EditForm);
|
||
|
||
foreach (var pi in parameter.GetType().GetProperties(true))
|
||
{
|
||
// 添加字段，加个前缀，避免与实体字段冲突
|
||
var ff = fields.Add(pi);
|
||
ff.Name = Prefix + ff.Name;
|
||
ff.Category = Category;
|
||
if (ff.Category.IsNullOrEmpty()) ff.Category = pi.GetCustomAttribute<CategoryAttribute>()?.Category;
|
||
if (ff.Category.IsNullOrEmpty()) ff.Category = "参数";
|
||
|
||
// 数组转为字符串
|
||
var v = pi.GetValue(parameter);
|
||
if (v is IList list)
|
||
{
|
||
v = list.Join(",");
|
||
ff.Type = v.GetType();
|
||
}
|
||
|
||
// 把参数值设置到实体对象的扩展属性里面
|
||
entity.SetItem(ff.Name, v);
|
||
}
|
||
|
||
return fields;
|
||
}
|
||
|
||
/// <summary>从表单读取数据到扩展字段的目标对象，稍候序列化并写入扩展字段</summary>
|
||
/// <param name="parameter"></param>
|
||
/// <param name="form"></param>
|
||
/// <returns></returns>
|
||
public Boolean ReadForm(Object parameter, IFormCollection form)
|
||
{
|
||
var flag = false;
|
||
foreach (var pi in parameter.GetType().GetProperties(true))
|
||
{
|
||
// 从Request里面获取参数值
|
||
var name = Prefix + pi.Name;
|
||
if (!form.ContainsKey(name)) continue;
|
||
|
||
var value = form[name].FirstOrDefault();
|
||
flag = true;
|
||
|
||
Object v = null;
|
||
if (pi.PropertyType.As<IList>())
|
||
{
|
||
var elmType = pi.PropertyType.GetElementTypeEx();
|
||
var ss = value.Split(",");
|
||
var arr = Array.CreateInstance(elmType, ss.Length);
|
||
for (var i = 0; i < arr.Length; i++)
|
||
{
|
||
arr.SetValue(ss[i].ChangeType(elmType), i);
|
||
}
|
||
|
||
v = arr;
|
||
}
|
||
else
|
||
{
|
||
v = value.ChangeType(pi.PropertyType);
|
||
}
|
||
|
||
// 设置到参数对象里面
|
||
parameter.SetValue(pi, v);
|
||
}
|
||
|
||
return flag;
|
||
}
|
||
#endregion
|
||
}
|