/// <summary>
/// Merges the specified <paramref name="table" /> into the <see cref="TargetTable" /> capturing the changes in the result.
/// </summary>
/// <param name="table">The table data to be merged.</param>
/// <returns>A collection of the merge output in a dictionary.</returns>
/// <exception cref="System.InvalidOperationException">Bulk-Copy only supported by SQL Server. Make sure DataSession was create with a valid SqlConnection.</exception>
/// <exception cref="System.ComponentModel.DataAnnotations.ValidationException">TargetTable is require for the merge definition.
/// or
/// At least one column is required for the merge definition.
/// or
/// At least one column is required to be marked as a key for the merge definition.
/// or
/// SourceColumn is require for column merge definition
/// or
/// NativeType is require for column merge definition</exception>
public IEnumerable <DataMergeOutputRow> MergeOutput(DataTable table)
{
// update definition to include output
_mergeDefinition.IncludeOutput = true;
// validate definition
if (!Validate(_mergeDefinition))
{
return(null);
}
var results = new List <DataMergeOutputRow>();
var columns = _mergeDefinition.Columns
.Where(c => c.IsIgnored == false)
.ToList();
// run merge capturing output
Merge(table, command =>
{
using (IDataReader reader = command.ExecuteReader())
{
var originalReader = new DataReaderWrapper(reader, DataMergeGenerator.OriginalPrefix);
var currentReader = new DataReaderWrapper(reader, DataMergeGenerator.CurrentPrefix);
while (reader.Read())
{
var output = new DataMergeOutputRow();
string action = reader.GetString("Action");
output.Action = action;
// copy to dictionary
foreach (var column in columns)
{
string name = column.SourceColumn;
var outputColumn = new DataMergeOutputColumn();
outputColumn.Name = name;
outputColumn.Original = originalReader.GetValue(name);
outputColumn.Current = currentReader.GetValue(name);
outputColumn.Type = currentReader.GetFieldType(name);
output.Columns.Add(outputColumn);
}
results.Add(output);
}
}
});
return(results);
}
/// <summary>
/// Merges the specified <paramref name="table" /> into the <see cref="TargetTable" /> capturing the changes in the result asynchronously.
/// </summary>
/// <param name="table">The table data to be merged.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>
/// A collection of the merge output in a dictionary.
/// </returns>
/// <exception cref="System.InvalidOperationException">Bulk-Copy only supported by SQL Server. Make sure DataSession was create with a valid SqlConnection.</exception>
/// <exception cref="System.ComponentModel.DataAnnotations.ValidationException">TargetTable is require for the merge definition.
/// or
/// At least one column is required for the merge definition.
/// or
/// At least one column is required to be marked as a key for the merge definition.
/// or
/// SourceColumn is require for column merge definition
/// or
/// NativeType is require for column merge definition</exception>
public async Task <IEnumerable <DataMergeOutputRow> > ExecuteOutputAsync(DataTable table, CancellationToken cancellationToken = default)
{
// update definition to include output
_mergeDefinition.IncludeOutput = true;
var results = new List <DataMergeOutputRow>();
var columns = _mergeDefinition.Columns
.Where(c => c.IsIgnored == false)
.ToList();
// run merge capturing output
await MergeAsync(table, cancellationToken, async (command, token) =>
{
using (var reader = await command.ExecuteReaderAsync(token).ConfigureAwait(false))
{
var originalReader = new DataReaderWrapper(reader, DataMergeGenerator.OriginalPrefix);
var currentReader = new DataReaderWrapper(reader, DataMergeGenerator.CurrentPrefix);
while (await reader.ReadAsync(token).ConfigureAwait(false))
{
var output = new DataMergeOutputRow();
string action = reader.GetString("Action");
output.Action = action;
// copy to dictionary
foreach (var column in columns)
{
string name = column.SourceColumn;
var outputColumn = new DataMergeOutputColumn();
outputColumn.Name = name;
outputColumn.Original = originalReader.GetValue(name);
outputColumn.Current = currentReader.GetValue(name);
outputColumn.Type = currentReader.GetFieldType(name);
output.Columns.Add(outputColumn);
}
results.Add(output);
}
}
});
return(results);
}
