public static void WriteParameterLen(this TdsPackageWriter writer, TdsMetaType.MetaDataWrite metaType, int size, bool isNull)
{
if (isNull)
{
return;
}
//write length of the parameter
if (metaType.IsPlp)
{
writer.WriteInt64(size);
}
else if (metaType.IsLong)
{
// text/image/SQLVariant have a 4 byte length, plp datatypes have 8 byte lengths
writer.WriteInt32(size);
}
else if (metaType.NullableType == TdsEnums.SQLDATETIME2 || metaType.NullableType == TdsEnums.SQLTIME || metaType.NullableType == TdsEnums.SQLDATETIMEOFFSET)
{
writer.WriteByte((byte)size);
}
else if (metaType.NullableType == TdsEnums.SQLBIGVARBINARY || metaType.NullableType == TdsEnums.SQLBIGCHAR || metaType.NullableType == TdsEnums.SQLNCHAR || metaType.NullableType == TdsEnums.SQLNVARCHAR) //skip varchar
{
writer.WriteInt16(size);
}
else
{
writer.WriteByte((byte)size); // 1 byte for everything else
}
}
public TdsParameter(string name, double value)
{
Name = name;
Value = value;
Size = 8;
MetaData = TdsMetaType.SqlFlt8;
SqlName = "float";
}
public TdsParameter(string name, float value)
{
Name = name;
Value = value;
Size = 4;
MetaData = TdsMetaType.SqlFlt4;
SqlName = "real";
}
public TdsParameter(string name, long value)
{
Name = name;
Value = value;
Size = 8;
MetaData = TdsMetaType.SqlInt4;
SqlName = "bigint";
}
public TdsParameter(string name, int value)
{
Name = name;
Value = value;
Size = 4;
MetaData = TdsMetaType.SqlInt3;
SqlName = "int";
}
public TdsParameter(string name, short value)
{
Name = name;
Value = value;
Size = 2;
MetaData = TdsMetaType.SqlInt2;
SqlName = "smallint";
}
public TdsParameter(string name, byte value)
{
Name = name;
Value = value;
Size = 1;
MetaData = TdsMetaType.SqlInt1;
SqlName = "tinyint";
}
public TdsParameter(string name, bool value)
{
Name = name;
Value = value;
Size = 1;
MetaData = TdsMetaType.SqlBitN;
SqlName = "bit";
}
public TdsParameter(string name, string value)
{
Name = name;
Value = value;
Size = value.Length * 2;
MetaData = TdsMetaType.SqlNVarChar;
SqlName = $"nvarchar({value.Length})";
}
public TdsParameter(string name, DateTime value)
{
Name = name;
Value = value;
Size = 8;
MetaData = TdsMetaType.SqlDateTimN;
SqlName = "datetime";
}
public TdsParameter(string name, decimal value, byte?scale = null)
{
Name = name;
Value = value;
Size = 17;
Scale = (byte)(scale ?? (decimal.GetBits(value)[3] >> 16) & 0xff);
MetaData = TdsMetaType.SqlNumericN;
SqlName = $"decimal(28,{Scale})";
}
public static void WriteTypeInfoLen(this TdsPackageWriter writer, TdsMetaType.MetaDataWrite metaType, int size, bool isNull)
{
//write length or isNull information about the type
if (metaType.IsPlp)
{
if (isNull)
{
writer.WriteInt64(unchecked ((long)TdsEnums.SQL_PLP_NULL));
}
else
{
writer.WriteInt64(size);
}
}
else if (metaType.IsLong)
{
// text/image/SQLVariant have a 4 byte length, plp datatypes have 8 byte lengths
if (isNull)
{
writer.WriteInt32(unchecked ((int)TdsEnums.VARLONGNULL));
}
else
{
writer.WriteInt32(size);
}
}
else if (metaType.NullableType == TdsEnums.SQLDATETIME2 || metaType.NullableType == TdsEnums.SQLTIME || metaType.NullableType == TdsEnums.SQLDATETIMEOFFSET)
{
if (isNull)
{
writer.WriteByte(TdsEnums.FIXEDNULL);
}
else
{
writer.WriteByte((byte)size);
}
}
else if (metaType.NullableType == TdsEnums.SQLBIGVARBINARY || metaType.NullableType == TdsEnums.SQLBIGCHAR || metaType.NullableType == TdsEnums.SQLNCHAR || metaType.NullableType == TdsEnums.SQLNVARCHAR) //skip varchar
{
// non-long but variable length column, must be a BIG* type: 2 byte length
writer.WriteInt16(isNull ? TdsEnums.VARNULL : size);
}
else
{
if (isNull)
{
writer.WriteByte(TdsEnums.FIXEDNULL);
}
else
{
writer.WriteByte((byte)size); // 1 byte for everything else
}
}
}
public static void WriteValue(TdsPackageWriter writer, object?value, TdsMetaType.MetaDataWrite metaData, bool isNull)
{
// write the value now
if (isNull)
{
return;
}
switch (value)
{
case string v:
writer.WriteUnicodeString(v);
break;
case decimal v:
writer.WriteSqlDecimal(v, 17);
break;
case bool v:
writer.WriteByte(v ? 1 : 0);
break;
case DateTime v:
writer.WriteDateTime(v);
break;
case byte v:
writer.WriteByte(v);
break;
case short v:
writer.WriteInt16(v);
break;
case int v:
writer.WriteInt32(v);
break;
case long v:
writer.WriteInt64(v);
break;
case float v:
writer.WriteFloat(v);
break;
case double v:
writer.WriteDouble(v);
break;
}
}
public static void WriteTdsTypeInfo(this TdsPackageWriter writer, TdsMetaType.MetaDataWrite metaData, int size, bool isNull, SqlCollations defaultCollation, byte scale)
{
var mt = metaData;
writer.WriteByte(mt.NullableType);
writer.WriteTypeInfoLen(mt, size, isNull); //typeinfo varlen
if (mt.HasCollation)
{
writer.WriteCollation2(defaultCollation);
}
if (mt.HasPrecision)
{
writer.WriteByte(28); //Max clr precision
}
if (mt.HasScale)
{
writer.WriteByte(scale); //
}
writer.WriteParameterLen(metaData, size, isNull); //len parameter
}
public static void WriteTdsTypeInfo(this TdsPackageWriter writer, TdsMetaType.MetaDataWrite metaData, int size, bool isNull)
{
WriteTdsTypeInfo(writer, metaData, size, isNull, null, 0);
}
