/// <summary>
/// 直接属性转换
/// </summary>
/// <typeparam name="T">实体类</typeparam>
/// <param name="lst">数据</param>
/// <returns></returns>
public static DataTable FromEntityToTable <T>(this IList <T> lst)
{
DataTable dt = new DataTable();
if (!cacheDataTable.ContainsKey(typeof(T).FullName))
{
var properties = typeof(T).GetProperties();
foreach (var p in properties)
{
var cur = Nullable.GetUnderlyingType(p.PropertyType);
dt.Columns.Add(p.Name, cur == null ? p.PropertyType : cur);
}
}
else
{
dt = cacheDataTable[typeof(T).FullName].Clone();
}
//1.如果调用table转换
//LoadDataTable<T> load = (LoadDataTable<T>)PersonToDataTable<T>().CreateDelegate(typeof(LoadDataTable<T>));
EntityDataTable <T> load = Find <T>();
foreach (var item in lst)
{
load(dt, item);
}
////2.如果调用行转换(控制度大些)
//LoadDataRow<T> loadrow = (LoadDataRow<T>)PersonToDataRow<T>().CreateDelegate(typeof(LoadDataRow<T>));
//foreach (var item in lst)
//{
// var row = dt.NewRow();
// loadrow(row, item);
// dt.Rows.Add(row);
//}
return(dt);
}
/// <summary>
/// 忽略特性的查找
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
private static EntityDataTable <T> Find <T>()
{
EntityDataTable <T> load = null;
object v = null;
string name = typeof(T).FullName;
if (cache.TryGetValue(name, out v))
{
load = v as EntityDataTable <T>;
}
else
{
load = (EntityDataTable <T>)EntityToDataTableEmit <T>().CreateDelegate(typeof(EntityDataTable <T>));
cache[name] = load;
}
return(load);
}
