IAttributes80

This interface gives the client access to all of a data source’s available attributes.

 

	Properties
	Attribute	Gets the IAttribute80 element in the specified zero-based index.
	Count	Gets the number of attributes the data source has.
	ImportAll	Sets a Boolean that determines if all of a data source’s attributes are to be imported.
	Item	Gets the IAttribute80 element in the specified zero-based index.
	Methods
	CreateAttribute	Creates a new attribute.
	IsAttributeExist	Checks whether a particular layer attribute exists.

 

Attribute

Gets the IAttribute80 element in the specified zero-based index. This property is exposed in C# and JavaScript in the following ways:

§   In C#, this property is exposed as Attribute, e.g.,

IAttributes80.Attribute["Name"] = "Paris";

Note:    In older versions of C#, this property is exposed as set_Attribute and get_Attribute, e.g.,

IAttributes80.set_Attribute["Name"] = "Paris";

§   In JavaScript use:

IAttributes80.Attribute("Name") = "Paris";

 

JavaScript
Attribute(AttributeName)

 

C#
string Attribute { get; set; }

 

C++
HRESULT Attribute(        [in] BSTR AttributeName,        [out, retval] BSTR* pVal) HRESULT Attribute(        [in] BSTR AttributeName,        [in] BSTR pVal)

 

Count

Gets the number of attributes the data source has.

 

JavaScript
Count

 

C#
int Count { get; }

 

C++
HRESULT Count([out, retval] long* pVal)

ImportAll

Sets a Boolean that determines if all of a data source’s attributes are to be imported.

 

JavaScript
ImportAll

 

C#
bool ImportAll { set; }

 

C++
HRESULT ImportAll([in] VARIANT_BOOL rhs)

Item

Gets the IAttribute80 element in the specified zero-based index.

To access a specific element use the following syntax: IAttributes80(index).

C# exposes this property as an indexer accessed using the following syntax: IAttributes80[index].

 

JavaScript
Item(        Index)

 

C#
dynamic this[object Index] { get; }

 

C++
HRESULT Item(        [in] VARIANT Index,        [out, retval] VARIANT* pVal)

CreateAttribute

Creates a new layer attribute. If an attribute name in uppercase is passed for a layer type that doesn’t support upper case attribute names (e.g., SQLite), the casing is automatically changed to lowercase (e.g., AttributeName > attributename), and an exception is returned informing you of the change.

 

JavaScript
CreateAttribute(        AttributeName,        attributeType,        Size,        Precision)

 

C#
void CreateAttribute(        string AttributeName,        AttributeTypeCode attributeType,        int Size,        int Precision = 15)

 

C++
HRESULT CreateAttribute(        BSTR AttributeName,        AttributeTypeCode attributeType,        long Size,        long Precision)

Parameters

AttributeName

A string that holds the attribute’s name.

attributeType

An enum that determines the attribute type. The following are the possible values:

·          AT_UNKNOWN = -1

·          AT_TEXT = 0

·          AT_INTEGER = 1

·          AT_DOUBLE = 2

Size

The size of the attribute (character length).

Precision

The number of decimal places. This property has effect only if the attributeType property is set to AT_DOUBLE.

Exceptions

If an attribute name in uppercase is passed for a layer type that doesn’t support upper case attribute names (e.g., SQLite), the casing is automatically changed to lowercase, and the exception “Attribute name changed” is returned informing you of the change.

See: HRESULT Return Values for a list of possible values returned by the HRESULT.

IsAttributeExist

Returns whether a specified layer attribute exists.

 

JavaScript
IsAttributeExist(        AttributeName)

 

C#
bool IsAttributeExist(        string AttributeName)

 

C++
HRESULT IsAttributeExist(        BSTR AttributeName,        VARIANT_BOOL* bExist)

Parameters

AttributeName

A string that holds the attribute’s name.

Return Value

bExist

A Boolean that determines if the attribute exists.

Exceptions

See: HRESULT Return Values for a list of possible values returned by the HRESULT.