public static void SerializeDataRow(object obj, BinaryWriter binaryWriter, MemoryStream ms, ISurrogateContext context)
{
var dataRow = obj as DataRow;
var dataTable = dataRow.Table;
var rowIndex = dataRow.Table.Rows.IndexOf(dataRow);
var rowError = dataRow.RowError == null ? "null" : dataRow.RowError;
var rowID = SurrogateUtils.GetRowID(dataRow);
binaryWriter.Write(rowIndex);
binaryWriter.Write(rowID);
binaryWriter.Write(rowError);
}
public static object DeserializeDataRow(BinaryReader binaryReader, ISurrogateContext context)
{
DataRow res = null;
var rowIndex = binaryReader.ReadInt32();
var rowID = binaryReader.ReadInt32();
var rowError = binaryReader.ReadString();
rowError = rowError == "null" ? null : rowError;
var dataTable = (DataTable)context.Dependencies[0];
try
{
//If the data table has been cleared a dummy row is return instead
//To-do: Implement a DataTable Surrogate in order to ensure rows consistency
if (dataTable.Rows.Count > 0 && rowIndex != -1)
{
//Lets try to find the Row in the table, if it's still there...
res = SurrogateUtils.GetRowInDataTable(dataTable, rowIndex, rowID);
if (res == null)
{
//If the table has no rows then current surrogate is not valid and must be removed as reference for the Table
res = dataTable.NewRow();
context.RemoveDependency(dataTable);
}
}
else
{
//If the table has no rows then current surrogate is not valid and must be removed as reference for the Table
res = dataTable.NewRow();
context.RemoveDependency(dataTable);
}
}
catch
{
//Temporary change: ensure that there is always a row to be returned
res = dataTable.NewRow();
context.RemoveDependency(dataTable);
}
return(res);
}
