/// <summary>
/// DataTable包装
/// </summary>
/// <param name="table"></param>
/// <param name="builder">数据流包装器</param>
/// <returns></returns>
internal static dataTable From(DataTable table, dataWriter builder)
{
dataTable value = new dataTable();
if ((value.rowCount = table.Rows.Count) != 0)
{
value.from(table, builder);
}
value.name = table.TableName;
return(value);
}
/// <summary>
/// DataSet包装
/// </summary>
/// <param name="set"></param>
private void from(DataSet set)
{
if (set.Tables.Count != 0)
{
using (dataWriter builder = new dataWriter())
{
tables = set.Tables.toGeneric <DataTable>().getArray(table => dataTable.From(table, builder));
data = builder.Get();
}
}
name = set.DataSetName;
}
/// <summary>
/// DataTable包装
/// </summary>
/// <param name="table"></param>
/// <returns></returns>
public static dataTable From(DataTable table)
{
if (table == null)
{
return(null);
}
dataTable value = new dataTable();
if ((value.rowCount = table.Rows.Count) != 0)
{
using (dataWriter builder = new dataWriter())
{
value.from(table, builder);
value.data = builder.Get();
}
}
return(value);
}
/// <summary>
/// DataTable包装
/// </summary>
/// <param name="table"></param>
/// <param name="builder">数据流包装器</param>
private unsafe void from(DataTable table, dataWriter builder)
{
int index = 0;
columnNames = new string[table.Columns.Count];
fixed(byte *columnFixed = columnTypes = new byte[columnNames.Length])
{
byte *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])
{
fixedMap nullMap = new fixedMap(nullFixed);
index = 0;
foreach (DataRow row in table.Rows)
{
columnIndex = columnFixed;
foreach (object value in row.ItemArray)
{
if (value == DBNull.Value)
{
nullMap.Set(index);
}
else
{
builder.Append(value, *columnIndex);
}
++index;
++columnIndex;
}
}
}
}
}
