IFields Interface

Provides access to members that return information about the fields.

Description

The Fields object represents a collection of columns in a table. The term _field_is synonymous with column. Each table in a database has an ordered collection of fields, there is always at least one field in a table. The ordered collection behaves like a list, so it is possible to access individual fields by a numbered position (or index) in the list.

Members

	Name	Description
	Field	The field at the specified index in the fields collection.
	FieldCount	The number of fields in the fields collection.
	FindField	Finds the index of the named field in the fields collection.
	FindFieldByAliasName	Finds the index of the field with the alias name in the fields collection.
	FindFieldIgnoreQualification	Finds the index of a field given a particular SQLSyntax workspace.

IFields.Field Property

The field at the specified index in the fields collection.

Public Function get_Field ( _
    ByVal Index As Integer _
) As IField

public IField get_Field (
    int Index
);

IFields.FieldCount Property

The number of fields in the fields collection.

Public ReadOnly Property FieldCount As Integer

public int FieldCount {get;}

Remarks

FieldCountis a one-based index. Therefore if you want to use IFields::FieldCount to get a particular index and use IFields::Field to get the field at the particular index, you will need to convert FieldCountto a zero-based index.

IFields.FindField Method

Finds the index of the named field in the fields collection.

Public Function FindField ( _
    ByVal Name As String _
) As Integer

public int FindField (
    string Name
);

Remarks

If FindField returns -1, the Field could not be found in the Fields collection.

Developers working with SDE should be aware of qualified field names and their impact on calls to FindField. For more information, see the IFields2 interface.

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IFields.FindFieldByAliasName Method

Finds the index of the field with the alias name in the fields collection.

Public Function FindFieldByAliasName ( _
    ByVal Name As String _
) As Integer

public int FindFieldByAliasName (
    string Name
);

Errors Returned

If no field is found, this method returns -1.

IFields.FindFieldIgnoreQualification Method

Finds the index of a field given a particular SQLSyntax workspace.

Public Sub FindFieldIgnoreQualification ( _
    ByVal sqlSyntax As ISQLSyntax, _
    ByVal Name As String, _
    ByRef Index As Integer _
)

public void FindFieldIgnoreQualification (
    ISQLSyntax sqlSyntax,
    string Name,
    ref int Index
);

Classes that implement IFields

Classes	Description
Fields	Esri Fields object.

Remarks

The IFieldsinterface provides information about a Fieldscollection and also provides access to individual fields. When using IFields::FindField, remember that there are equivalent methods on IClassand ICursor�they are shortcuts which save you having to get the Fieldscollection.

When programming with ArcMap, there is a distinction between IFieldsand two other interfaces, ILayerFieldsand ITableFields. ILayerFieldsis particular to an ArcMap layer, so for example, an alias name belongs to the field as defined in that layer rather than being stored with the underlying table.