/// <summary>
/// Inflate the token
/// </summary>
/// <param name="source">Stream to inflate the token from</param>
/// <returns>TRUE if inflation is complete</returns>
public bool Inflate(Stream source)
{
// Read user type
UserType = TDSUtilities.ReadUInt(source);
// Read flags
Flags = new TDSColumnDataFlags(TDSUtilities.ReadUShort(source));
// Read server type
DataType = (TDSDataType)source.ReadByte();
// Dispatch further reading based on the type
switch (DataType)
{
case TDSDataType.Binary:
case TDSDataType.VarBinary:
case TDSDataType.Char:
case TDSDataType.VarChar:
// The above types are deprecated after TDS 7205.
case TDSDataType.BitN:
case TDSDataType.Guid:
case TDSDataType.IntN:
case TDSDataType.MoneyN:
case TDSDataType.FloatN:
case TDSDataType.DateTimeN:
{
// Byte length
DataTypeSpecific = source.ReadByte();
break;
}
case TDSDataType.DateN:
{
// No details
DataTypeSpecific = null;
break;
}
case TDSDataType.TimeN:
case TDSDataType.DateTime2N:
case TDSDataType.DateTimeOffsetN:
{
// Scale
DataTypeSpecific = source.ReadByte();
break;
}
case TDSDataType.DecimalN:
case TDSDataType.NumericN:
{
// Read values
byte length = (byte)source.ReadByte();
byte precision = (byte)source.ReadByte();
byte scale = (byte)source.ReadByte();
// Decimal data type specific
DataTypeSpecific = new TDSDecimalColumnSpecific(length, precision, scale);
break;
}
case TDSDataType.BigBinary:
case TDSDataType.BigVarBinary:
{
// Short length
DataTypeSpecific = TDSUtilities.ReadUShort(source);
break;
}
case TDSDataType.BigChar:
case TDSDataType.BigVarChar:
case TDSDataType.NChar:
case TDSDataType.NVarChar:
{
// SHILOH CHAR types have collation associated with it.
TDSShilohVarCharColumnSpecific typedSpecific = new TDSShilohVarCharColumnSpecific();
// Read length
typedSpecific.Length = TDSUtilities.ReadUShort(source);
// Create collation
typedSpecific.Collation = new TDSColumnDataCollation();
// Read collation
typedSpecific.Collation.WCID = TDSUtilities.ReadUInt(source);
typedSpecific.Collation.SortID = (byte)source.ReadByte();
DataTypeSpecific = typedSpecific;
break;
}
case TDSDataType.Text:
case TDSDataType.NText:
{
// YukonTextType.Len + YukonTextType.tdsCollationInfo + YukonTextType.cParts
// cb = sizeof(LONG) + sizeof(TDSCOLLATION) + sizeof(BYTE);
break;
}
case TDSDataType.Image:
{
// Data length
DataTypeSpecific = TDSUtilities.ReadUInt(source);
break;
}
case TDSDataType.SSVariant:
{
// Data length
DataTypeSpecific = TDSUtilities.ReadUInt(source);
break;
}
case TDSDataType.Udt:
{
// hr = GetUDTColFmt(pvOwner, dwTimeout);
break;
}
case TDSDataType.Xml:
{
// cb = sizeof(lpColFmt->YukonXmlType.bSchemaPresent);
break;
}
}
// Check if table name is available
if (DataType == TDSDataType.Text || DataType == TDSDataType.NText || DataType == TDSDataType.Image)
{
// Allocate table name container
TableName = new List <string>();
// Read part count
byte partCount = (byte)source.ReadByte();
// Write each part
for (byte bPart = 0; bPart < partCount; bPart++)
{
// Read table part length and value
TableName.Add(TDSUtilities.ReadString(source, (ushort)(TDSUtilities.ReadUShort(source) * 2)));
}
}
// Read column name
Name = TDSUtilities.ReadString(source, (ushort)(source.ReadByte() * 2));
return(true);
}
/// <summary>
/// Inflate the token
/// </summary>
/// <param name="source">Stream to inflate the token from</param>
/// <returns>TRUE if inflation is complete</returns>
public bool Inflate(Stream source)
{
// Read user type
UserType = TDSUtilities.ReadUInt(source);
// Read flags
Flags = new TDSColumnDataFlags(TDSUtilities.ReadUShort(source));
// Read server type
DataType = (TDSDataType)source.ReadByte();
// Dispatch further reading based on the type
switch (DataType)
{
case TDSDataType.Binary:
case TDSDataType.VarBinary:
case TDSDataType.Char:
case TDSDataType.VarChar:
// The above types are deprecated after TDS 7205.
case TDSDataType.BitN:
case TDSDataType.Guid:
case TDSDataType.IntN:
case TDSDataType.MoneyN:
case TDSDataType.FloatN:
case TDSDataType.DateTimeN:
{
// Byte length
DataTypeSpecific = source.ReadByte();
break;
}
case TDSDataType.DateN:
{
// No details
DataTypeSpecific = null;
break;
}
case TDSDataType.TimeN:
case TDSDataType.DateTime2N:
case TDSDataType.DateTimeOffsetN:
{
// Scale
DataTypeSpecific = source.ReadByte();
break;
}
case TDSDataType.DecimalN:
case TDSDataType.NumericN:
{
// Read values
byte length = (byte)source.ReadByte();
byte precision = (byte)source.ReadByte();
byte scale = (byte)source.ReadByte();
// Decimal data type specific
DataTypeSpecific = new TDSDecimalColumnSpecific(length, precision, scale);
break;
}
case TDSDataType.BigBinary:
case TDSDataType.BigVarBinary:
{
// Short length
DataTypeSpecific = TDSUtilities.ReadUShort(source);
break;
}
case TDSDataType.BigChar:
case TDSDataType.BigVarChar:
case TDSDataType.NChar:
case TDSDataType.NVarChar:
{
// SHILOH CHAR types have collation associated with it.
TDSShilohVarCharColumnSpecific typedSpecific = new TDSShilohVarCharColumnSpecific();
// Read length
typedSpecific.Length = TDSUtilities.ReadUShort(source);
// Create collation
typedSpecific.Collation = new TDSColumnDataCollation();
// Read collation
typedSpecific.Collation.WCID = TDSUtilities.ReadUInt(source);
typedSpecific.Collation.SortID = (byte)source.ReadByte();
DataTypeSpecific = typedSpecific;
break;
}
case TDSDataType.Text:
case TDSDataType.NText:
{
// YukonTextType.Len + YukonTextType.tdsCollationInfo + YukonTextType.cParts
// cb = sizeof(LONG) + sizeof(TDSCOLLATION) + sizeof(BYTE);
break;
}
case TDSDataType.Image:
{
// Data length
DataTypeSpecific = TDSUtilities.ReadUInt(source);
break;
}
case TDSDataType.SSVariant:
{
// Data length
DataTypeSpecific = TDSUtilities.ReadUInt(source);
break;
}
case TDSDataType.Udt:
{
// hr = GetUDTColFmt(pvOwner, dwTimeout);
break;
}
case TDSDataType.Xml:
{
// cb = sizeof(lpColFmt->YukonXmlType.bSchemaPresent);
break;
}
}
// Check if table name is available
if (DataType == TDSDataType.Text || DataType == TDSDataType.NText || DataType == TDSDataType.Image)
{
// Allocate table name container
TableName = new List<string>();
// Read part count
byte partCount = (byte)source.ReadByte();
// Write each part
for (byte bPart = 0; bPart < partCount; bPart++)
{
// Read table part length and value
TableName.Add(TDSUtilities.ReadString(source, (ushort)(TDSUtilities.ReadUShort(source) * 2)));
}
}
// Read column name
Name = TDSUtilities.ReadString(source, (ushort)(source.ReadByte() * 2));
return true;
}
/// <summary>
/// Default constructor
/// </summary>
public TDSColumnData()
{
// Create flags
Flags = new TDSColumnDataFlags();
}
/// <summary>
/// Default constructor
/// </summary>
public TDSColumnData()
{
// Create flags
Flags = new TDSColumnDataFlags();
}