/// <summary>
/// 将 datatable 转换为 list
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="table"></param>
/// <returns></returns>
public static List <T> ToList <T>(this DataTable table) where T : class, new()
{
var list = new List <T>();
var _Entity = ReflexHelper.CreateInstance <T>();
var propertyInfo = _Entity.GetType().GetProperties(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public);
foreach (DataRow dr in table.Rows)
{
_Entity = ReflexHelper.CreateInstance <T>();
foreach (var item in propertyInfo)
{
string AttrName = item.Name;
foreach (DataColumn dc in dr.Table.Columns)
{
if (AttrName != dc.ColumnName)
{
continue;
}
if (dr[dc.ColumnName] != DBNull.Value)
{
item.SetValue(_Entity, dr[dc.ColumnName], null);
}
else
{
item.SetValue(_Entity, null, null);
}
}
}
list.Add(_Entity);
}
return(list);
}
/// <summary>
/// DataRow 转换 实体
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="dr"></param>
/// <returns></returns>
public static T ToEntity <T>(this DataRow dr) where T : class, new()
{
var _Entity = ReflexHelper.CreateInstance <T>();
var list = _Entity.GetType().GetProperties(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public);
if (list.Length == 0)
{
throw new Exception("找不到任何 公共属性！");
}
foreach (var item in list)
{
string AttrName = item.Name;
foreach (DataColumn dc in dr.Table.Columns)
{
if (AttrName != dc.ColumnName)
{
continue;
}
if (dr[dc.ColumnName] != DBNull.Value)
{
item.SetValue(_Entity, dr[dc.ColumnName], null);
}
}
}
return(_Entity);
}
/// <summary>
/// 对象 转换为 MemberInitExpression
/// </summary>
/// <param name="_type"></param>
/// <returns></returns>
public static MemberInitExpression MemberInit <T>(T _entity)
{
var proInfo = ReflexHelper.GetPropertyInfos(typeof(T));
var list = new List <MemberBinding>();
foreach (var item in proInfo)
{
list.Add(Expression.Bind(item, Expression.Constant(item.GetValue(_entity), item.PropertyType)));
}
var newExpr = Expression.New(typeof(T));
return(Expression.MemberInit(newExpr, list));
}
/// <summary>
/// 将多个实体组合成为一个 字典类型
/// </summary>
/// <param name="di"></param>
/// <returns></returns>
public static Dictionary <string, object> EntityToDictionary(Dictionary <string, object> di)
{
Dictionary <string, object> r = new Dictionary <string, object>();
foreach (var item in di)
{
Console.WriteLine(item.Value.GetType());
Console.WriteLine(item.Value.GetType().Namespace);
if (item.Value.GetType().Namespace == "ADT.Models")
{
ReflexHelper.GetPropertyInfos(item.Value.GetType()).ToList().ForEach(pi =>
{
if (pi.GetValue(item.Value, null) == null)
{
r.Add(pi.Name, null);
}
else
{
if (pi.PropertyType == typeof(DateTime))
{
r.Add(pi.Name, pi.GetValue(item.Value, null).ToDateTimeFormat("yyyy-MM-dd HH:mm:ss"));
}
else
{
r.Add(pi.Name, pi.GetValue(item.Value, null));
}
}
});
}
else
{
r.Add(item.Key, item.Value);
}
}
return(r);
}
/// <summary>
/// 获取 对象 中 某个属性得 标记
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="_type"></param>
/// <param name="_name"></param>
/// <returns></returns>
public static T GetAttribute <T>(Type _type, string _name) where T : Attribute
{
return(ReflexHelper.GetPropertyInfo(_type, _name).GetCustomAttribute(typeof(T)) as T);
}
/// <summary>
/// 获取 对象 属性上 标记 集合
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="_type"></param>
/// <param name="_name"></param>
/// <returns></returns>
public static List <T> GetAttributes <T>(Type _type, string _name) where T : Attribute
{
return(ReflexHelper.GetPropertyInfo(_type, _name).GetCustomAttributes <T>(false).ToList());
}
/// <summary>
/// 设置 值
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="_entity"></param>
/// <param name="_name"></param>
/// <param name="_val"></param>
public static void SetValue <T>(T _entity, string _name, object _val)
{
ReflexHelper.GetPropertyInfo(typeof(T), _name).SetValue(_entity, _val);
}
/// <summary>
/// 获取 值
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="_entity"></param>
/// <param name="_name"></param>
/// <returns></returns>
public static object GetValue <T>(T _entity, string _name)
{
return(ReflexHelper.GetPropertyInfo(typeof(T), _name).GetValue(_entity));
}