RAD Studio VCL Reference
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The properties of the TField class are listed here.
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Name |
Description |
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This is AsAnsiString, a member of class TField. | |
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Represents the field's value as a TBcd value. | |
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Represents the field's value as a boolean value. | |
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Represents the field's value as an array of bytes. | |
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Represents the field's value as a Currency value. | |
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Represents the field's value as a TDateTime value. | |
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This is AsExtended, a member of class TField. | |
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Represents the field's value as a double value. | |
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Represents the field's value as a 32-bit integer. | |
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Represents the field's value as a TSQLTimeStamp. | |
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Represents the field's value as a string (Delphi) or an AnsiString (C++). | |
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This is AsWideString, a member of class TField. | |
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Specifies the name of an attribute set in the data dictionary to apply to the field component. | |
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Determines whether the value of the field is calculated by the OnCalcFields event handler of its dataset. | |
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Specifies whether a field can be modified. | |
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Represents the current value of the field component including changes made by other users of the database. | |
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Identifies the dataset to which a field component belongs. | |
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Indicates the amount of memory needed to store a field component's value. | |
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Identifies the data type of the field component. | |
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Represents the name of the field for display purposes. | |
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Represents the field's value as it is displayed in a data-aware control. | |
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Contains a mask that restricts the data that can be entered into a data field. | |
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Provides read-only access to the EditMask property. | |
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Indicates the ordinal position of the field's column in the underlying table or query result. | |
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Indicates the field name qualified by the full name of the parent field, if any. | |
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Indicates whether a field is an index field. | |
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Indicates whether the field has a value assigned to it. | |
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Determines whether the field is specified as a lookup field. | |
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Indicates a cache of values from the LookupDataSet indexed by a set of values from the KeyFields property. | |
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Represents the current value of the field component including pending cached updates. | |
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Indicates the number of bytes added to the end of the current record buffer in the dataset for storing cached values (for calculated fields or BLOB fields). | |
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Represents the original value of the field (as a Variant). | |
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Specifies the TObjectField object from which this field is derived. | |
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Indicates the size used in the definition of the physical database field for data types that support different sizes. | |
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Contains the string to display in a data-aware control when the field is in edit mode. | |
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Specifies the characters that can be included in the text representation of the field's value. | |
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Represents the data in a field component. |
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Name |
Description |
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Determines how the field's data is displayed within a data-aware control. | |
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Indicates whether the field values can be generated by the server rather than entered by the user. | |
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Specifies a customized error message that appears when the user tries to set a value that violates the data constraints of the field. | |
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Specifies an SQL string the enforces any application-specific constraints on the field's value. | |
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Specifies an SQL expression that is assigned to the field if the user does not provide a value. | |
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Contains the text to display in the corresponding column heading of a data grid. | |
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Specifies the number of characters that should be used to display a field's value by a cooperating data-aware control. | |
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Indicates whether a field represents a column in a dataset, a calculated field, or a lookup field. | |
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Indicates the name of the physical column in the underlying table or query result to which a field component is bound. | |
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Indicates whether field values are constrained. | |
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Represents an SQL clause that enforces constraints stored on the server. | |
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Specifies the field component's index in the Fields property of the dataset. | |
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Identifies the field or fields in the dataset that must be matched in a lookup dataset when doing a lookup. | |
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Determines whether the values of a lookup field are cached or looked up dynamically every time the current record in the dataset changes. | |
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Identifies the dataset used to look up field values. | |
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Identifies the field or fields in the lookup dataset to match when doing a lookup. | |
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Identifies the field from the lookup dataset whose value becomes the Value property of the field component. | |
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Indicates the name of the field in its original database table. | |
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Specifies how a provider uses the field value when applying updates. | |
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Determines whether the field can be modified. | |
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Specifies whether a nonblank value for a field is required. | |
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Determines whether the field appears in a data grid. |
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