/// <summary>
/// 写入数据表信息
/// </summary>
/// <param name="dt"></param>
/// <param name="bw"></param>
private static void WriteDataTable(DataTable dt, BinaryWriter bw)
{
MemTypeManager.WriteString(bw, dt.TableName);
//写入列数
MemTypeManager.WriteInt(bw, dt.Columns.Count);
List <MemTypeItem> lstItem = new List <MemTypeItem>(dt.Columns.Count);//列的信息
MemTypeItem item = null;
//写入列信息
foreach (DataColumn col in dt.Columns)
{
MemTypeManager.WriteString(bw, col.ColumnName);//列名
//列类型ID
item = MemTypeManager.GetTypeInfo(col.DataType);
if (item != null)
{
MemTypeManager.WriteInt(bw, item.TypeID);
lstItem.Add(item);
}
else
{
lstItem.Add(item);
}
}
//行数
MemTypeManager.WriteInt(bw, dt.Rows.Count);
//写入数据
foreach (DataRow row in dt.Rows)
{
for (int i = 0; i < lstItem.Count; i++)
{
if (row.IsNull(i))
{
lstItem[i].WriterHandle(bw, null);
continue;
}
object value = row[i];
if (lstItem[i] == null)
{
continue;
}
lstItem[i].WriterHandle(bw, value);
}
}
}
private static DataTable ReadDataTable(BinaryReader br)
{
DataTable dt = new DataTable();
dt.TableName = MemTypeManager.ReadString(br) as string;
int columnCount = (int)MemTypeManager.ReadInt(br);//列数
string name = null;
int typeCode = 0;
List <MemTypeItem> lstItem = new List <MemTypeItem>(columnCount);//列的信息
for (int i = 0; i < columnCount; i++)
{
name = MemTypeManager.ReadString(br) as string;
typeCode = (int)MemTypeManager.ReadInt(br);
MemTypeItem item = MemTypeManager.GetTypeByID(typeCode);
if (item != null)
{
dt.Columns.Add(name, item.ItemType);
lstItem.Add(item);
}
}
int rows = (int)MemTypeManager.ReadInt(br);
dt.BeginLoadData();
for (int i = 0; i < rows; i++)
{
DataRow dr = dt.NewRow();
for (int k = 0; k < lstItem.Count; k++)
{
MemTypeItem colItem = lstItem[k];
object value = colItem.ReadHandle(br);
if (value != null)
{
dr[k] = value;
}
}
dt.Rows.Add(dr);
}
dt.EndLoadData();
return(dt);
}
