Type library name |
JaguarTypeLibrary |
DLL name |
jagproxy.dll |
Represents one column in a row of tabular data.
Type – Integer. Returns a constant that indicates the column’s datatype. Table 4-1 lists possible values.
Value – Variant. Returns the column’s value in the Variant type that matches the column’s database type. Table 4-1 lists SQL datatypes and the corresponding Variant types.
ActualSize – Integer. For string and binary data, returns the length of the current value.
DefinedSize – Integer. For string and binary data, returns the maximum length that values in the column may have.
Name – String. Returns the column’s name.
NumericScale – Integer. For fixed-precision numeric values, returns the column’s scale. The scale is the number of decimal digits to the right of the decimal point.
OriginalValue – Same as the Value property.
Precision – Integer. For fixed-precision numeric values, returns the column’s precision. The precision is the number of decimal digits in the value.
UnderlyingValue – Same as the Value property.
For sample code that accesses a Field object’s properties, see Chapter 20, “Creating ActiveX Clients,” in the EAServer Programmer’s Guide.
Table 4-1 lists SQL datatypes, the corresponding values for the Type property, and the corresponding Variant datatypes for the Value property. Values for the type property are defined in the DataTypeEnum enumeration. The table lists both the symbolic DataTypeEnum values and the numeric constants that they represent. Some automation controllers may not be able to use symbolic values from an enumeration; in these controllers, use the numeric constant instead.
SQL datatype |
Field.Type constant |
Field.Value return type |
|---|---|---|
BIT, or 1 bit of data |
adBoolean (11) |
VT_BOOL
(1 maps to |
TINYINT, an 1-byte integer |
adTinyInt (16) |
VT_UI1 |
SMALLINT, a 2-byte integer |
adSmallInt (2) |
VT_I2 |
INTEGER, a 4-byte integer |
adInteger (3) |
VT_I4 |
FLOAT, an 8-byte floating point number |
adDouble (5) |
VT_R8 |
CHAR, string values that do not vary in length |
adChar (129) |
VT_BSTR |
VARCHAR, string values that can vary in length |
adVarChar (200) |
VT_BSTR |
BINARY, an array of bytes that does not vary in length |
adBinary (128) |
VT_ARRAY |
VARBINARY, an array of bytes that may vary in length |
adVarBinary (204) |
VT_ARRAY |
NUMERIC, a fixed-point decimal number |
adNumeric (131) |
VT_R8 (No direct mapping exists. Mapped to 8-byte floating point) |
DECIMAL, a fixed-point decimal number |
adDecimal (14) |
VT_R8 (No direct mapping exists. Mapped to 8-byte floating point) |
DATE, a date value including the time-of-day |
adDate (7) |
VT_DATE |
MONEY, a cash value |
adCurrency (6) |
VT_CY |
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