/// <summary>
/// 异步查询数据库并将结果首行填充实体
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="query">要执行的查询</param>
/// <param name="token">取消指示</param>
/// <param name="converter">异步实体转换方法</param>
/// <returns>实体</returns>
public async static Task <T> ExecuteEntityAsync <T>(this IAsyncDbExecutableQuery query, CancellationToken token, Func <DataRow, CancellationToken, Task <T> > converter)
{
var dataItem = await query.ExecuteFirstRowAsync(token);
return(await converter(dataItem, token));
}
/// <summary>
/// 查询数据库并将结果首行填充实体
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="query">要执行的查询</param>
/// <param name="token">取消指示</param>
/// <returns>实体</returns>
public async static Task <T> ExecuteEntityAsync <T>(this IAsyncDbExecutableQuery query, CancellationToken token = default(CancellationToken)) where T : new()
{
var dataItem = await query.ExecuteFirstRowAsync(token);
return(dataItem.ToEntity <T>());
}
/// <summary>
/// 查询数据库并将结果首行填充实体
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="query">要执行的查询</param>
/// <param name="token">取消指示</param>
/// <param name="converter">实体转换方法</param>
/// <returns>实体</returns>
public async static Task <T> ExecuteEntityAsync <T>(this IAsyncDbExecutableQuery query, CancellationToken token, IEntityConverter <T> converter) where T : new()
{
var dataItem = await query.ExecuteFirstRowAsync(token);
return(dataItem.ToEntity <T>(converter));
}
/// <summary>
/// 异步执行查询并将第一个结果集的第一条记录填充动态对象
/// </summary>
/// <param name="query">要执行的查询</param>
/// <returns>查询结果</returns>
public static async Task <dynamic> ExecuteDynamicObjectAsync(this IAsyncDbExecutableQuery query)
{
var dataItem = await query.ExecuteFirstRowAsync();
return(ToDynamic(dataItem));
}