/// <summary>
/// Thread safe group by function, should be called from Pre-validate only. Returns max(count()) group by column names
/// </summary>
/// <param name="commaSeparatedColumnNames">Comma separated column names</param>
/// <returns>count</returns>
public int PreValidateGroupByMaxCount(string commaSeparatedColumnNames)
{
List <string> columns = new List <string>(commaSeparatedColumnNames.Split(",".ToCharArray()));
lock (_lock)
{
var result = from row in InputData.AsEnumerable()
group row by columns into grp
select new
{
Id = grp.Key,
Count = grp.Count()
};
int max = 0;
foreach (var r in result)
{
if (r.Count > max)
{
max = r.Count;
}
}
return(max);
}
}
/// <summary>
/// Thread safe group by function, should be called from Pre-validate only. Returns max(count()) group by column names
/// </summary>
/// <param name="commaSeparatedColumnNames">Comma separated column names</param>
/// <param name="isSytemColumn">True if the system columns to be searched</param>
/// <returns>count</returns>
public int PostValidateGroupByMaxCount(string commaSeparatedColumnNames, bool isSytemColumn = false)
{
List <string> columns = new List <string>(commaSeparatedColumnNames.Split(",".ToCharArray()));
DataTable table = new DataTable();
foreach (string column in columns)
{
table.Columns.Add(column);
}
lock (_lock)
{
foreach (Row row in Rows)
{
DataRow dtRow = table.NewRow();
foreach (string column in columns)
{
if (isSytemColumn)
{
dtRow[column] = row.ColumnsSystem[column];
}
else
{
dtRow[column] = row.Columns[column];
}
}
table.Rows.Add(dtRow);
}
var result = from row in InputData.AsEnumerable()
group row by columns into grp
select new
{
Id = grp.Key,
Count = grp.Count()
};
int max = 0;
foreach (var r in result)
{
if (r.Count > max)
{
max = r.Count;
}
}
return(max);
}
}
