TcxValueType Class

The base class for classes that implement functionality related to different value types in DevExpress data controllers and other data-related APIs.

Declaration

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TcxValueType = class(
    TObject
)

The TcxValueType class has members that allow you to do the following:

Do not use the TcxValueType class directly. Use the following descendants that correspond to TFieldType values:

Caption[1] Value	TcxValueType Descendant	TFieldType[2] Value	Description
`'String'`	TcxStringValueType	`ftString`	Unicode string values.
`'WideString'`	TcxWideStringValueType	`ftWideString`	Wide string values.
`'Smallint'`	TcxSmallintValueType	`ftSmallint`	16-bit signed integer values.
`'Integer'`	TcxIntegerValueType	`ftInteger`	32-bit signed integer values.
`'Word'`	TcxWordValueType	`ftWord`	16-bit unsigned integer values.
`'Boolean'`	TcxBooleanValueType	`ftBoolean`	Boolean values.
`'Single'`	TcxSingleValueType	`ftSingle`	Single precision floating-point values.
`'Float'`	TcxFloatValueType	`ftFloat`	Double precision floating-point values.
`'Currency'`	TcxCurrencyValueType	`ftCurrency`	Monetary values.
`'DateTime'`	TcxDateTimeValueType	`ftDateTime`	Date and time values.
`'LargeInt'`	TcxLargeIntValueType	`ftLargeInt`	64-bit signed integer values.
`'FMTBcd'`	TcxFMTBcdValueType	`ftFMTBcd`	Binary-encoded decimal values that can be converted to Currency without a loss of precision.
`'SQLTimeStamp'`	TcxSQLTimeStampValueType	`ftTimeStamp`[3]	High-precision date and time values.
`'Variant'`	TcxVariantValueType	`ftVariant`	Values of any type.
`'BLOB'`[4]	TcxBLOBValueType	`fsBlob`	BLOBs (Binary Large OBjects) as values. BLOB values are most often used for storing files in a database.
`'Object'`[5]	TcxObjectValueType	`ftObject`	Values that store non-visual objects (TObject descendant instances) with arbitrary data for an unbound editor or Data Grid item.

When a container control is in unbound mode, the corresponding ValueTypeClass or ValueType property specifies the default in-place editor.

TObject TcxValueType

Footnotes

Different TcxValueType class descendants return different caption values.
This column lists the corresponding TFieldType values.
'SQLTimeStamp' also corresponds to the TSQLTimeStamp type.
Use this value type with those controls and editors that support BLOB.
Use this type only in custom or inherited components because DevExpress and standard VCL components have no information on actual content of such values.