/// <summary>
/// Deletes from matching row in DataSet.
/// </summary>
/// <typeparam name="TSource">Entity type of the source DataSet.</typeparam>
/// <param name="source">The source matching DataSet.</param>
/// <param name="rowIndex">The row index in the DataSet.</param>
/// <param name="keyMapper">Provides key mapping between source DataSet and this table.</param>
/// <param name="ct">The async cancellation token.</param>
/// <returns>Number of records deleted.</returns>
public Task <int> DeleteAsync <TSource>(DataSet <TSource> source, int rowIndex, Func <TSource, T, KeyMapping> keyMapper, CancellationToken ct = default(CancellationToken))
where TSource : class, IEntity, new()
{
VerifyDeletable();
Verify(source, nameof(source), rowIndex, nameof(rowIndex));
var columnMappings = Verify(keyMapper, nameof(keyMapper), source._).GetColumnMappings();
return(DbTableDelete <T> .ExecuteAsync(this, source, rowIndex, columnMappings, ct));
}
/// <summary>
/// Deletes records in this database table from matching database recordset.
/// </summary>
/// <typeparam name="TSource">Entity type of the source database recordset.</typeparam>
/// <param name="source">The matching database recordset.</param>
/// <param name="keyMapper">Provides key mapping between source database recordset and this table.</param>
/// <param name="ct">The async cancellation token.</param>
/// <returns>Number of records deleted.</returns>
public Task <int> DeleteAsync <TSource>(DbSet <TSource> source, Func <TSource, T, KeyMapping> keyMapper, CancellationToken ct = default(CancellationToken))
where TSource : Model, new()
{
VerifyDeletable();
Verify(source, nameof(source));
var columnMappings = Verify(keyMapper, nameof(keyMapper), source._).GetColumnMappings();
return(DbTableDelete <T> .ExecuteAsync(this, source, columnMappings, ct));
}
/// <summary>
/// Deletes records in this database table from matching DataSet.
/// </summary>
/// <typeparam name="TSource">Entity type of the source DataSet.</typeparam>
/// <param name="source">The source matching DataSet.</param>
/// <param name="keyMapper">Provides key mapping between source DataSet and this table.</param>
/// <param name="ct">The async cancellation token.</param>
/// <returns>Number of records deleted.</returns>
public Task <int> DeleteAsync <TSource>(DataSet <TSource> source, Func <TSource, T, KeyMapping> keyMapper, CancellationToken ct = default(CancellationToken))
where TSource : class, IEntity, new()
{
Verify(source, nameof(source));
if (source.Count == 1)
{
return(DeleteAsync(source, 0, keyMapper, ct));
}
VerifyDeletable();
var targetKey = Verify(keyMapper, nameof(keyMapper), source._).TargetKey;
return(DbTableDelete <T> .ExecuteAsync(this, source, targetKey, ct));
}
/// <summary>
/// Deletes records in this database table by condition.
/// </summary>
/// <param name="where">The condition.</param>
/// <param name="ct">The async cancellation token.</param>
/// <returns>Number of records deleted.</returns>
public Task <int> DeleteAsync(Func <T, _Boolean> where, CancellationToken ct = default(CancellationToken))
{
VerifyDeletable();
return(DbTableDelete <T> .ExecuteAsync(this, where, ct));
}