/// <summary>
/// 执行命令，将结果集的第一行转换为实体
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public async Task <T> ToSingleAsync <T>() where T : class, new()
{
return(await ExecuteAsync <T>(
async cmd => {
using (DbDataReader reader = await cmd.ExecuteReaderAsync()) {
IDataLoader <T> loader = DataLoaderFactory.GetLoader <T>();
return loader.ToSingle(reader);
}
}));
}
/// <summary>
/// 执行命令，将结果集的第一行转换为实体
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <returns>实体</returns>
public T ToSingle <T>() where T : class, new()
{
return(Execute <T>(
cmd => {
using (DbDataReader reader = cmd.ExecuteReader()) {
IDataLoader <T> loader = DataLoaderFactory.GetLoader <T>();
return loader.ToSingle(reader);
}
}));
}
/// <summary>
/// 从DataRow加载一个实体对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="row"></param>
/// <returns></returns>
public static T ToSingle <T>(this DataRow row) where T : class, new()
{
if (row == null)
{
throw new ArgumentNullException("row");
}
IDataLoader <T> loader = DataLoaderFactory.GetLoader <T>();
return(loader.ToSingle(row));
}
/// <summary>
/// 从DataTable中加载一个实体列表
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="table"></param>
/// <returns></returns>
public static List <T> ToList <T>(this DataTable table) where T : class, new()
{
if (table == null)
{
throw new ArgumentNullException("table");
}
IDataLoader <T> loader = DataLoaderFactory.GetLoader <T>();
return(loader.ToList(table));
}
