ADO Type Property
 Complete Parameter Object Reference
The Type property sets or returns a DataTypeEnum
value that indicates the type of a Parameter, Field, or a Property object.
| Object |
Description of the Type
Property |
| Parameter |
The Type property has read/write permissions on a Parameter
object
|
| Field |
The Type property is read/write, with one exception; for new Field objects that
are added to the Fields collection of a Record, this property is read-only
before the Value property has been set and before the provider has called the Update method of the Fields
collection
|
| Property |
The Type property is read-only for a Property object
|
Syntax
Example - For a Field object
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "c:/webdata/northwind.mdb"
set rs = Server.CreateObject("ADODB.Recordset")
rs.open "Select * from orders", conn
response.write(rs.Fields(0).Type)
rs.Close
conn.close
%>
|
Example - For a Parameter object
<%
set comm=Server.CreateObject("ADODB.Command")
set para=Server.CreateObject("ADODB.Parameter")
para.Type=adVarChar
para.Size=25
para.Direction=adParamInput
para.Value=varfname
comm.Parameters.Append para
%>
|
Example - For a Property object
<%
set conn=Server.CreateObject("ADODB.Connection")
conn.Provider="Microsoft.Jet.OLEDB.4.0"
conn.Open "c:/webdata/northwind.mdb"
set rs = Server.CreateObject("ADODB.Recordset")
rs.open "Select * from orders", conn
set prop=Server.CreateObject("ADODB.Property")
'Display the property attributes of the Orders Table
for each prop in rs.Properties
response.write("Attr:" & prop.Attributes & "<br />")
response.write("Name:" & prop.Name & "<br />")
response.write("Value:" & prop.Value & "<br />")
next
rs.close
conn.close
set rs=nothing
set conn=nothing
%>
|
DataTypeEnum Values
Specifies the data type of a Field, Parameter, or Property object
| Constant |
Value |
Description |
| adEmpty |
0 |
No value |
| adSmallInt |
2 |
A 2-byte signed integer. |
| adInteger |
3 |
A 4-byte signed integer. |
| adSingle |
4 |
A single-precision floating-point value. |
| adDouble |
5 |
A double-precision floating-point value. |
| adCurrency |
6 |
A currency value |
| adDate |
7 |
The number of days since December 30, 1899 + the fraction of a
day. |
| adBSTR |
8 |
A null-terminated character string. |
| adIDispatch |
9 |
A pointer to an IDispatch interface on a COM object. Note: Currently not supported by ADO.
|
| adError |
10 |
A 32-bit error code |
| adBoolean |
11 |
A boolean value. |
| adVariant |
12 |
An Automation Variant. Note:
Currently not
supported by ADO.
|
| adIUnknown |
13 |
A pointer to an IUnknown interface on a COM
object. Note: Currently not
supported by ADO.
|
| adDecimal |
14 |
An exact numeric value with a fixed precision and
scale. |
| adTinyInt |
16 |
A 1-byte signed integer. |
| adUnsignedTinyInt |
17 |
A 1-byte unsigned integer. |
| adUnsignedSmallInt |
18 |
A 2-byte unsigned integer. |
| adUnsignedInt |
19 |
A 4-byte unsigned integer. |
| adBigInt |
20 |
An 8-byte signed integer. |
| adUnsignedBigInt |
21 |
An 8-byte unsigned integer. |
| adFileTime |
64 |
The number of
100-nanosecond intervals since January 1,1601 |
| adGUID |
72 |
A globally unique identifier (GUID) |
| adBinary |
128 |
A binary value. |
| adChar |
129 |
A string value. |
| adWChar |
130 |
A null-terminated Unicode character string. |
| adNumeric |
131 |
An exact numeric value with a fixed precision and
scale. |
| adUserDefined |
132 |
A user-defined variable. |
| adDBDate |
133 |
A date value (yyyymmdd). |
| adDBTime |
134 |
A time value (hhmmss). |
| adDBTimeStamp |
135 |
A date/time stamp (yyyymmddhhmmss plus a fraction in
billionths). |
| adChapter |
136 |
A 4-byte chapter value that identifies rows in a
child rowset |
| adPropVariant |
138 |
An Automation PROPVARIANT. |
| adVarNumeric |
139 |
A numeric value (Parameter object only). |
| adVarChar |
200 |
A string value (Parameter object only). |
| adLongVarChar |
201 |
A long string value. |
| adVarWChar |
202 |
A null-terminated Unicode character string. |
| adLongVarWChar |
203 |
A long null-terminated Unicode string value. |
| adVarBinary |
204 |
A binary value (Parameter object only). |
| adLongVarBinary |
205 |
A long binary value. |
| AdArray |
0x2000 |
A flag value combined with another data type constant. Indicates an array of that other data type. |
Complete Parameter Object Reference
 |
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