# OpcName Members > Reference: Represents the name of any kind of OPC UA entity through qualifying its nominal information with a reference to the namespace within the name is used.

Type: OpcName
Namespace: Opc.UaFx
Assembly: Opc.UaFx.Advanced.dll
Package: Opc.UaFx.Advanced v2.59.0
Also in: Opc.UaFx.Client

## Constructors ### OpcName 3 overloads | Overload | Description | |---|---| | [OpcName(string)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#opcname-system-string) | Initializes a new instance of the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) class using the `value` specified. | | [OpcName(string, int)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#opcname-system-string-system-int32) | Initializes a new instance of the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) class using the `value` and `namespaceIndex` specified. | | [OpcName(string, OpcNamespace)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#opcname-system-string-opc-uafx-opcnamespace) | Initializes a new instance of the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) class using the `value` and `nameNamespace` specified. | #### OpcName(string) Initializes a new instance of the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) class using the `value` specified.

```csharp public OpcName(string value) ```

```vbnet Public Sub New(value As String) ```

**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The [string](https://learn.microsoft.com/dotnet/api/system.string) value of the name to represent. A null reference (Nothing in Visual Basic) or a value equals [Empty](https://learn.microsoft.com/dotnet/api/system.string.empty) results into a null name (see [IsNull](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#isnull)). | #### OpcName(string, int) Initializes a new instance of the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) class using the `value` and `namespaceIndex` specified.

```csharp public OpcName(string value, int namespaceIndex) ```

```vbnet Public Sub New(value As String, namespaceIndex As Integer) ```

**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The [string](https://learn.microsoft.com/dotnet/api/system.string) value of the name to represent. A null reference (Nothing in Visual Basic) or a value equals [Empty](https://learn.microsoft.com/dotnet/api/system.string.empty) results into a null name (see [IsNull](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#isnull)). | | `namespaceIndex` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) | The index of the namespace that this name should refer to. | #### OpcName(string, OpcNamespace) Initializes a new instance of the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) class using the `value` and `nameNamespace` specified.

```csharp public OpcName(string value, OpcNamespace nameNamespace) ```

```vbnet Public Sub New(value As String, nameNamespace As OpcNamespace) ```

**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The [string](https://learn.microsoft.com/dotnet/api/system.string) value of the name to represent. A null reference (Nothing in Visual Basic) or a value equals [Empty](https://learn.microsoft.com/dotnet/api/system.string.empty) results into a null name (see [IsNull](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#isnull)). | | `nameNamespace` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The namespace that this name should refer to. | ## Properties ### IsNull Gets a value indicating whether the name is a null name.

```csharp public bool IsNull { get; } ```

```vbnet Public ReadOnly Property IsNull As Boolean ```

**Property value** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if the [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#value) is a null reference (Nothing in Visual Basic) or equals to [Empty](https://learn.microsoft.com/dotnet/api/system.string.empty); otherwise the value false. ### Namespace Gets the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) used by the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) to describe the namespace to that the name belongs.

```csharp public OpcNamespace Namespace { get; } ```

```vbnet Public ReadOnly Property [Namespace] As OpcNamespace ```

**Property value** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) An instance of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) with the known information about the namespace to that the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) belongs. ### NamespaceIndex Gets the index of the namespace that this name belongs.

```csharp public int NamespaceIndex { get; } ```

```vbnet Public ReadOnly Property NamespaceIndex As Integer ```

**Property value** [Int32](https://learn.microsoft.com/dotnet/api/system.int32) The index value which refers to the namespace in the namespace array of the server to that the name belong. **Remarks** The available namespaces of the server can be retrieved through reading the value of the namespaces-node using the node identifier 'OpcObjectTypes.Server.Namespaces'. ### NamespaceUri Gets the uniform resource identifier (URI) of the namespace referred by the [NamespaceIndex](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#namespaceindex).

```csharp public Uri NamespaceUri { get; } ```

```vbnet Public ReadOnly Property NamespaceUri As Uri ```

**Property value** [Uri](https://learn.microsoft.com/dotnet/api/system.uri) The [Uri](https://learn.microsoft.com/dotnet/api/system.uri) to that the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) refers using the [NamespaceIndex](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#namespaceindex). ### Null static Gets the default null name.

```csharp public static OpcName Null { get; } ```

```vbnet Public Shared ReadOnly Property Null As OpcName ```

**Property value** [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) An instance of the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) which can be used for general purpose in cases there a null name is enough. ### Value Gets the name without any namespace information.

```csharp public string Value { get; } ```

```vbnet Public ReadOnly Property Value As String ```

**Property value** [String](https://learn.microsoft.com/dotnet/api/system.string) The (unqualified) value of the name. ## Methods ### CompareTo 2 overloads | Overload | Description | |---|---| | [CompareTo(object)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#compareto-system-object) | Compares the current [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) with the `other`. | | [CompareTo(OpcName)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#compareto-opc-uafx-opcname) | Compares the current [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) with another [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/). | #### CompareTo(object) Compares the current [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) with the `other`.

```csharp public int CompareTo(object other) ```

```vbnet Public Function CompareTo(other As Object) As Integer ```

**Parameters** | Name | Type | Description | |---|---|---| | `other` | [Object](https://learn.microsoft.com/dotnet/api/system.object) | The [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) to compare with this [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/). | **Returns** [Int32](https://learn.microsoft.com/dotnet/api/system.int32) A 32-bit signed integer that indicates the relative order of the objects being compared ([CompareTo(object)](https://learn.microsoft.com/dotnet/api/system.icomparable.compareto)). **Implements** [CompareTo(object)](https://learn.microsoft.com/dotnet/api/system.icomparable.compareto) #### CompareTo(OpcName) Compares the current [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) with another [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/).

```csharp public int CompareTo(OpcName other) ```

```vbnet Public Function CompareTo(other As OpcName) As Integer ```

**Parameters** | Name | Type | Description | |---|---|---| | `other` | [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) | The [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) to compare with this [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/). | **Returns** [Int32](https://learn.microsoft.com/dotnet/api/system.int32) A 32-bit signed integer that indicates the relative order of the objects being compared ([CompareTo(T)](https://learn.microsoft.com/dotnet/api/system.icomparable-1.compareto)). **Implements** [CompareTo(OpcName)](https://learn.microsoft.com/dotnet/api/system.icomparable-1.compareto) ### Equals 2 overloads | Overload | Description | |---|---| | [Equals(object)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#equals-system-object)override | Determines whether the specified `other` is equal to this [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/). | | [Equals(OpcName)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#equals-opc-uafx-opcname) | Determines whether the specified `other` is equal to this [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/). | #### Equals(object) override Determines whether the specified `other` is equal to this [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/).

```csharp public override bool Equals(object other) ```

```vbnet Public Overrides Function Equals(other As Object) As Boolean ```

**Parameters** | Name | Type | Description | |---|---|---| | `other` | [Object](https://learn.microsoft.com/dotnet/api/system.object) | The [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) to compare to the current [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/). | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if the specified [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) is equal to the current [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/); otherwise the value false. **Overrides** [Equals(object)](https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals%28system-object%29) #### Equals(OpcName) Determines whether the specified `other` is equal to this [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/).

```csharp public bool Equals(OpcName other) ```

```vbnet Public Function Equals(other As OpcName) As Boolean ```

```csharp public override int GetHashCode() ```

```vbnet Public Overrides Function GetHashCode() As Integer ```

**Returns** [Int32](https://learn.microsoft.com/dotnet/api/system.int32) An [int](https://learn.microsoft.com/dotnet/api/system.int32) that contains the hash code for the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/). **Overrides** [GetHashCode()](https://learn.microsoft.com/dotnet/api/system.object.gethashcode) ### IsNullOrEmpty static · since v2.14 Indicates whether the specified [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) is null or its [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#value) is null or an empty string ("").

```csharp public static bool IsNullOrEmpty(OpcName name) ```

```vbnet Public Shared Function IsNullOrEmpty(name As OpcName) As Boolean ```

**Parameters** | Name | Type | Description | |---|---|---| | `name` | [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) | The [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) to test. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if the `name` parameter or its [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#value) is null or an empty string (""); otherwise the value false. **Remarks** This method ignores the circumstance whether the [Namespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#namespace) of the `name` might be specified anyway. ### Parse static Converts a name string to a [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) instance.

```csharp public static OpcName Parse(string value) ```

```vbnet Public Shared Function Parse(value As String) As OpcName ```

**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | A string that contains a name. | **Returns** [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) An instance of the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) class. **Exceptions** | Exception | Condition | |---|---| | [FormatException](https://learn.microsoft.com/dotnet/api/system.formatexception) | The `value` is not a valid name. | ### ToString override Returns a string representing the name.

```csharp public override string ToString() ```

```vbnet Public Overrides Function ToString() As String ```

**Returns** [String](https://learn.microsoft.com/dotnet/api/system.string) A string formatted with the [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#value) and [Namespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#namespace) of the name. **Overrides** [ToString()](https://learn.microsoft.com/dotnet/api/system.object.tostring) ### TryParse static Determines whether a string is a valid name.

```csharp public static bool TryParse(string value, out OpcName name) ```

```vbnet Public Shared Function TryParse(value As String, name As OpcName) As Boolean ```

**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The string to validate. | | `name` | out [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) | The [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) version of the string. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true, if `value` is a valid name; otherwise the value false. ## Operators ### Equality static Returns a value indicating whether two instance of [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) are equal.

```csharp public static bool operator ==(OpcName left, OpcName right) ```

```vbnet Public Shared Operator =(left As OpcName, right As OpcName) As Boolean ```

```csharp public static explicit operator QualifiedName(OpcName value) ```

```vbnet Public Shared Narrowing Operator CType(value As OpcName) As QualifiedName ```

**Parameters** | Name | Type | Description | |---|---|---| | `value` | [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) | A [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) that represents the qualified name. | **Returns** QualifiedName An instance of the QualifiedName class initialized from the `value`. ### GreaterThan static Determines whether the first specified [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) object is greater than the second specified [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) object.

```csharp public static bool operator >(OpcName left, OpcName right) ```

```vbnet Public Shared Operator >(left As OpcName, right As OpcName) As Boolean ```

```csharp public static bool operator >=(OpcName left, OpcName right) ```

```vbnet Public Shared Operator >=(left As OpcName, right As OpcName) As Boolean ```

**Parameters** | Name | Type | Description | |---|---|---| | `left` | [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) | The first [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) object. | | `right` | [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) | The second [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) object. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if `left` is greater than or equal to `right`; otherwise, false. ### Implicit static · 2 overloads | Overload | Description | |---|---| | [implicit operator OpcName(string)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#op-implicit-system-string-opc-uafx-opcname)static | Converts a [string](https://learn.microsoft.com/dotnet/api/system.string) to an [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) object. | | [implicit operator OpcName(QualifiedName)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#op-implicit-opc-ua-qualifiedname-opc-uafx-opcname)static | Converts a QualifiedName to an [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) object. | #### implicit operator OpcName(string) static Converts a [string](https://learn.microsoft.com/dotnet/api/system.string) to an [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) object.

```csharp public static implicit operator OpcName(string value) ```

```vbnet Public Shared Widening Operator CType(value As String) As OpcName ```

**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | A string that represents the name. | **Returns** [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) An instance of the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) class initialized from the `value`. #### implicit operator OpcName(QualifiedName) static Converts a QualifiedName to an [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) object.

```csharp public static implicit operator OpcName(QualifiedName value) ```

```vbnet Public Shared Widening Operator CType(value As QualifiedName) As OpcName ```

**Parameters** | Name | Type | Description | |---|---|---| | `value` | QualifiedName | A QualifiedName that represents the name. | **Returns** [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) An instance of the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) class initialized from the `value`. ### Inequality static Returns a value indicating whether two instances of [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) are not equal.

```csharp public static bool operator !=(OpcName left, OpcName right) ```

```vbnet Public Shared Operator <>(left As OpcName, right As OpcName) As Boolean ```

```csharp public static bool operator <(OpcName left, OpcName right) ```

```vbnet Public Shared Operator <(left As OpcName, right As OpcName) As Boolean ```

**Parameters** | Name | Type | Description | |---|---|---| | `left` | [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) | The first [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) object. | | `right` | [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) | The second [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) object. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if `left` is less than `right`; otherwise the value false. **Exceptions** | Exception | Condition | |---|---| | [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `left` is a null reference (Nothing in Visual Basic). | ### LessThanOrEqual static Determines whether the first specified [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) object is less than or equal to the second [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) object.

```csharp public static bool operator <=(OpcName left, OpcName right) ```

```vbnet Public Shared Operator <=(left As OpcName, right As OpcName) As Boolean ```