/// <summary>
/// 异步加载数据到 DataTable
/// </summary>
/// <param name="startRecord">要填充的起始记录位置</param>
/// <param name="maxRecords">最多填充的记录条数</param>
/// <param name="token">取消指示</param>
/// <returns>填充好的 DataTable</returns>
public async Task <DataTable> LoadDataTableAsync(int startRecord, int maxRecords, CancellationToken token = default)
{
try
{
return(await DataTableAdapter.FillDataTableAsync(DataReader, startRecord, maxRecords));
}
catch (Exception exception)
{
OnException(exception);
throw;
}
}
/// <summary>
/// 创建数据库查询执行上下文
/// </summary>
/// <param name="dataReader">用于读取数据的 IDataReader 对象</param>
/// <param name="tracing">用于追踪此次查询过程的追踪器</param>
/// <param name="sync">用于同步的对象，如果有的话</param>
///
protected DbExecuteContextBase(IDataReader dataReader, IDbTracing tracing = null, object sync = null)
{
DataReader = dataReader ?? throw new ArgumentNullException(nameof(dataReader));
SyncRoot = sync;
Tracing = tracing;
DataTableAdapter = new DataTableAdapter();
if (SyncRoot != null)
{
Monitor.Enter(SyncRoot);
}
}
/// <summary>
/// 创建数据库查询执行上下文
/// </summary>
/// <param name="dataReader">用于读取数据的 IDataReader 对象</param>
/// <param name="tracing">用于追踪此次查询过程的追踪器</param>
/// <param name="connectionResource">销毁该上下文时，需要同时销毁的连接资源</param>
/// <param name="sync">用于同步的对象，如果有的话</param>
protected DbExecuteContextBase( IDataReader dataReader, IDbTracing tracing = null, IDisposable connectionResource = null, object sync = null )
{
if ( dataReader == null )
throw new ArgumentNullException( "dataReader" );
SyncRoot = sync;
DataReader = dataReader;
ConnectionResource = connectionResource;
Tracing = tracing;
DataTableAdapter = new DataTableAdapter();
if ( SyncRoot != null )
Monitor.Enter( SyncRoot );
}
/// <summary>
/// 创建数据库查询执行上下文
/// </summary>
/// <param name="dataReader">用于读取数据的 IDataReader 对象</param>
/// <param name="tracing">用于追踪此次查询过程的追踪器</param>
/// <param name="connectionResource">销毁该上下文时，需要同时销毁的连接资源</param>
/// <param name="sync">用于同步的对象，如果有的话</param>
protected DbExecuteContextBase(IDataReader dataReader, IDbTracing tracing = null, IDisposable connectionResource = null, object sync = null)
{
if (dataReader == null)
{
throw new ArgumentNullException("dataReader");
}
SyncRoot = sync;
DataReader = dataReader;
ConnectionResource = connectionResource;
Tracing = tracing;
DataTableAdapter = new DataTableAdapter();
if (SyncRoot != null)
{
Monitor.Enter(SyncRoot);
}
}
/// <summary>
/// 创建数据库查询执行上下文
/// </summary>
/// <param name="dataReader">用于读取数据的 IDataReader 对象</param>
/// <param name="tracing">用于追踪此次查询过程的追踪器</param>
/// <param name="disposeMethod">销毁上下文时要执行的方法</param>
/// <param name="sync">用于同步的对象，如果有的话</param>
protected DbExecuteContextBase(IDataReader dataReader, IDbTracing tracing = null, Action disposeMethod = null, object sync = null)
{
if (dataReader == null)
{
throw new ArgumentNullException("dataReader");
}
SyncRoot = sync;
this.disposeMethod = disposeMethod;
DataReader = dataReader;
Tracing = tracing;
DataTableAdapter = new DataTableAdapter();
if (SyncRoot != null)
{
Monitor.Enter(SyncRoot);
}
}
