public IList <ProtoDataColumn> GetColumns(
IDataReader reader,
ProtoDataWriterOptions options)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
if (options == null)
{
throw new ArgumentNullException("options");
}
using (DataTable schema = reader.GetSchemaTable())
{
bool schemaSupportsExpressions = schema.Columns.Contains("Expression");
var columns = new List <ProtoDataColumn>(schema.Rows.Count);
for (int i = 0; i < schema.Rows.Count; i++)
{
// Assumption: rows in the schema table are always ordered by
// Ordinal position, ascending
DataRow row = schema.Rows[i];
// Skip computed columns unless requested.
if (schemaSupportsExpressions)
{
bool isComputedColumn;
if (IsRunningOnMono)
{
isComputedColumn = Equals(row["Expression"], string.Empty);
}
else
{
isComputedColumn = !(row["Expression"] is DBNull);
}
if (isComputedColumn && !options.IncludeComputedColumns)
{
continue;
}
}
var col = new ProtoDataColumn
{
ColumnIndex = i,
ProtoDataType = ConvertProtoDataType.FromClrType((Type)row["DataType"]),
ColumnName = (string)row["ColumnName"]
};
columns.Add(col);
}
return(columns);
}
}
public IEnumerable<ProtoDataColumn> GetColumns(
IDataReader reader,
ProtoDataWriterOptions options)
{
if (reader == null) throw new ArgumentNullException("reader");
if (options == null) throw new ArgumentNullException("options");
using (var schema = reader.GetSchemaTable())
{
var schemaSupportsExpressions = schema.Columns.Contains("Expression");
var columns = new List<ProtoDataColumn>(schema.Rows.Count);
for (var i = 0; i < schema.Rows.Count; i++)
{
// Assumption: rows in the schema table are always ordered by
// Ordinal position, ascending
var row = schema.Rows[i];
// Skip computed columns unless requested.
var isComputedColumn = schemaSupportsExpressions && !(row["Expression"] is DBNull);
if (isComputedColumn && !options.IncludeComputedColumns)
continue;
var col = new ProtoDataColumn
{
ColumnIndex = i,
ProtoDataType = ConvertProtoDataType.FromClrType((Type)row["DataType"]),
ColumnName = (string)row["ColumnName"]
};
columns.Add(col);
}
return columns;
}
}
public IList<ProtoDataColumn> GetColumns(
IDataReader reader,
ProtoDataWriterOptions options)
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
if (options == null)
{
throw new ArgumentNullException("options");
}
using (DataTable schema = reader.GetSchemaTable())
{
bool schemaSupportsExpressions = schema.Columns.Contains("Expression");
var columns = new List<ProtoDataColumn>(schema.Rows.Count);
for (int i = 0; i < schema.Rows.Count; i++)
{
// Assumption: rows in the schema table are always ordered by
// Ordinal position, ascending
DataRow row = schema.Rows[i];
// Skip computed columns unless requested.
if (schemaSupportsExpressions)
{
bool isComputedColumn;
if (IsRunningOnMono)
{
isComputedColumn = Equals(row["Expression"], string.Empty);
}
else
{
isComputedColumn = !(row["Expression"] is DBNull);
}
if (isComputedColumn && !options.IncludeComputedColumns)
{
continue;
}
}
var col = new ProtoDataColumn
{
ColumnIndex = i,
ProtoDataType = ConvertProtoDataType.FromClrType((Type)row["DataType"]),
ColumnName = (string)row["ColumnName"]
};
columns.Add(col);
}
return columns;
}
}
