/// <summary>
/// DataSet包装
/// </summary>
/// <param name="set"></param>
private void FromPackage(DataSet set)
{
if (set.Tables.Count != 0)
{
using (var TmphBuilder = new TmphDataWriter())
{
_tables = set.Tables.toGeneric<DataTable>().getArray(table => TmphDataTable.From(table, TmphBuilder));
_data = TmphBuilder.Get();
}
}
_name = set.DataSetName;
}
/// <summary>
/// DataTable包装
/// </summary>
/// <param name="table"></param>
/// <returns></returns>
public static TmphDataTable From(DataTable table)
{
if (table == null) return null;
var value = new TmphDataTable();
if ((value._rowCount = table.Rows.Count) != 0)
{
using (var TmphBuilder = new TmphDataWriter())
{
value.FromPackage(table, TmphBuilder);
value._data = TmphBuilder.Get();
}
}
return value;
}
/// <summary>
/// DataTable包装
/// </summary>
/// <param name="table"></param>
/// <param name="TmphBuilder">数据流包装器</param>
/// <returns></returns>
public static TmphDataTable From(DataTable table, TmphDataWriter TmphBuilder)
{
var value = new TmphDataTable();
if ((value._rowCount = table.Rows.Count) != 0) value.FromPackage(table, TmphBuilder);
value._name = table.TableName;
return value;
}
/// <summary>
/// DataTable包装
/// </summary>
/// <param name="table"></param>
/// <param name="TmphBuilder">数据流包装器</param>
private unsafe void FromPackage(DataTable table, TmphDataWriter TmphBuilder)
{
var index = 0;
_columnNames = new string[table.Columns.Count];
fixed (byte* columnFixed = _columnTypes = new byte[_columnNames.Length])
{
var columnIndex = columnFixed;
foreach (DataColumn column in table.Columns)
{
if (!TypeIndexs.TryGetValue(column.DataType, out *columnIndex)) *columnIndex = 255;
++columnIndex;
_columnNames[index++] = column.ColumnName;
}
fixed (byte* nullFixed = _dbNull = new byte[(_columnNames.Length * _rowCount + 7) >> 3])
{
var nullMap = new TmphFixedMap(nullFixed);
index = 0;
foreach (DataRow row in table.Rows)
{
columnIndex = columnFixed;
foreach (var value in row.ItemArray)
{
if (value == DBNull.Value) nullMap.Set(index);
else TmphBuilder.Append(value, *columnIndex);
++index;
++columnIndex;
}
}
}
}
}
