/// <summary>
/// Advances the reader to the next result when reading the results of a batch of statements.
/// </summary>
/// <returns>
/// true if there are more result sets; otherwise false.
/// </returns>
public override bool NextResult()
{
if (this.wrappedReader.NextResult())
{
this.queryResults = null;
return(true);
}
return(false);
}
/// <summary>
/// Initializes a new instance of the EFCachingDataReaderCacheWriter class.
/// </summary>
/// <param name="wrappedReader">The wrapped reader.</param>
/// <param name="addToCache">The delegate used to add the result to the cache when the reader finishes.</param>
/// <param name="behavior">An instance of System.Data.CommandBehavior.</param>
public EFCachingDataReaderCacheWriter(DbDataReader wrappedReader, Action <DbQueryResults> addToCache, CommandBehavior behavior)
{
this.wrappedReader = wrappedReader;
this.addToCache = addToCache;
base.behavior = behavior;
this.queryResult = new DbQueryResults(this.wrappedReader)
{
FieldCount = this.wrappedReader.FieldCount,
VisibleFieldCount = this.wrappedReader.VisibleFieldCount
};
}
/// <summary>
/// Advances the reader to the next record in a result set.
/// </summary>
/// <returns>
/// true if there are more rows; otherwise false.
/// </returns>
public override bool Read()
{
if (this.wrappedReader.Read())
{
var values = new object[this.wrappedReader.FieldCount];
this.wrappedReader.GetValues(values);
SetValues(values);
if (this.queryResults != null)
{
this.queryResults.Rows.Add(values);
if (this.queryResults.Rows.Count > this.maxRows)
{
this.queryResults = null;
}
}
return(true);
}
return(false);
}
/// <summary>
/// Closes the <see cref="T:System.Data.Common.DbDataReader"/> object.
/// </summary>
public override void Close()
{
if (this.queryResult != null && this.queryResult.RowsCount > 0)
{
///Reader not yet closed
if (!this.wrappedReader.IsClosed)
{
///Complete result has been fetched from database.
if (!this.wrappedReader.Read())
{
this.addToCache(this.queryResult);
this.queryResult.Dispose();
this.queryResult = null;
}
else ///There was still some data to be read when the reader is closed
///We shall not cache incomplete result
{
this.queryResult.Dispose();
this.queryResult = null;
}
}
}
this.wrappedReader.Close();
}
/// <summary>
/// Initializes a new instance of the CachingDataReaderCacheReader class.
/// </summary>
/// <param name="item">The cached item.</param>
/// <param name="behavior">An instance of System.Data.CommandBehavior.</param>
public CachingDataReaderCacheReader(DbQueryResults queryResults, CommandBehavior behavior)
{
this.queryResults = queryResults;
base.behavior = behavior;
}
/// <summary>
/// Initializes a new instance of the CachingDataReaderCacheReader class.
/// </summary>
/// <param name="queryResults">The query results.</param>
public CachingDataReaderCacheReader(DbQueryResults queryResults)
{
this.queryResults = queryResults;
}