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 # Class PointExpression

 Last update: 09.03.2026 

<a id="VM_Managed_PointExpression"></a>

Namespace: [VM.Managed](VM.Managed.md)  
Assembly: VMAppCore.dll

This class is to represent information of point through expression(string) parsing.

```csharp
public class PointExpression : PointBase, IObservableObject, IDisposableObject, ILinkable, IObject, ILinkContainer, IOwned, IHasID, IEventProvider, ILinkContainerEvent, IVerifiable, IHasReplaceableEntity

```

#### Inheritance

object ← ObservableObject ← [LinkableBase](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/Pre/Data/VM.Models.Pre/Models/LinkableBase.cs) ← [LinkContainer](VM.Managed.LinkContainer.md) ← [PointBase](VM.Managed.PointBase.md) ← [PointExpression](VM.Managed.PointExpression.md)

#### Implements

IObservableObject, IDisposableObject, ILinkable, IObject, ILinkContainer, IOwned, IHasID, IEventProvider, [ILinkContainerEvent](VM.Managed.ILinkContainerEvent.md), [IVerifiable](VM.Managed.IVerifiable.md), IHasReplaceableEntity

#### Inherited Members

[PointBase.IsParametric(Primitive.enRefType)](VM.Managed.PointBase.md#VM_Managed_PointBase_IsParametric_VM_Managed_Primitive_enRefType_), [PointBase.IsParametric(string)](VM.Managed.PointBase.md#VM_Managed_PointBase_IsParametric_System_String_), [PointBase.ReadXml(XmlReader)](VM.Managed.PointBase.md#VM_Managed_PointBase_ReadXml_System_Xml_XmlReader_), [PointBase.WriteXml(XmlWriter)](VM.Managed.PointBase.md#VM_Managed_PointBase_WriteXml_System_Xml_XmlWriter_), [PointBase.GetSchema()](VM.Managed.PointBase.md#VM_Managed_PointBase_GetSchema), [PointBase.HasReplaceableEntity(IObjectBase)](VM.Managed.PointBase.md#VM_Managed_PointBase_HasReplaceableEntity_VM_Models_Pre_IObjectBase_), [PointBase.ReplaceEntity(IObjectBase, IObjectBase)](VM.Managed.PointBase.md#VM_Managed_PointBase_ReplaceEntity_VM_Models_Pre_IObjectBase_VM_Models_Pre_IObjectBase_), [PointBase.IsParameterized](VM.Managed.PointBase.md#VM_Managed_PointBase_IsParameterized), [PointBase.Z](VM.Managed.PointBase.md#VM_Managed_PointBase_Z), [PointBase.Y](VM.Managed.PointBase.md#VM_Managed_PointBase_Y), [PointBase.X](VM.Managed.PointBase.md#VM_Managed_PointBase_X), [PointBase.Value](VM.Managed.PointBase.md#VM_Managed_PointBase_Value), [LinkContainer.SetModified()](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_SetModified), [LinkContainer.raise\_OnUpdating(object, LinkEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_raise_OnUpdating_System_Object_VM_Managed_LinkEventArgs_), [LinkContainer.raise\_OnUpdate(object, LinkEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_raise_OnUpdate_System_Object_VM_Managed_LinkEventArgs_), [LinkContainer.raise\_OnDestroying(object, LinkEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_raise_OnDestroying_System_Object_VM_Managed_LinkEventArgs_), [LinkContainer.raise\_OnDestroy(object, LinkEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_raise_OnDestroy_System_Object_VM_Managed_LinkEventArgs_), [LinkContainer.raise\_OnAdded(object, AddToDocEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_raise_OnAdded_System_Object_VM_Managed_AddToDocEventArgs_), [LinkContainer.raise\_OnRemoved(object, RemoveFromDocEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_raise_OnRemoved_System_Object_VM_Managed_RemoveFromDocEventArgs_), [LinkContainer.GetTargetListForUpdate()](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_GetTargetListForUpdate), [LinkContainer.SkipUpdateObjectImpl()](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_SkipUpdateObjectImpl), [LinkContainer.Initialize(Unit.ConvertFactor)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_Initialize_VM_Unit_ConvertFactor_), [LinkContainer.SetFlagWhenXMLFile(string, bool)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_SetFlagWhenXMLFile_System_String_System_Boolean_), [LinkContainer.IsSerializableEvent(Delegate)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_IsSerializableEvent_System_Delegate_), [LinkContainer.CustomGetObjectData(SerializationInfo, StreamingContext)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_CustomGetObjectData_System_Runtime_Serialization_SerializationInfo_System_Runtime_Serialization_StreamingContext_), [LinkContainer.GetSerializedData(SerializationInfo, StreamingContext)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_GetSerializedData_System_Runtime_Serialization_SerializationInfo_System_Runtime_Serialization_StreamingContext_), [LinkContainer.LinkRequestUpdating(object, LinkEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_LinkRequestUpdating_System_Object_VM_Managed_LinkEventArgs_), [LinkContainer.LinkRequestUpdate(object, LinkEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_LinkRequestUpdate_System_Object_VM_Managed_LinkEventArgs_), [LinkContainer.LinkRequestDestroying(object, LinkEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_LinkRequestDestroying_System_Object_VM_Managed_LinkEventArgs_), [LinkContainer.LinkRequestDestroy(object, LinkEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_LinkRequestDestroy_System_Object_VM_Managed_LinkEventArgs_), [LinkContainer.LinkAddedToDocument(object, AddToDocEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_LinkAddedToDocument_System_Object_VM_Managed_AddToDocEventArgs_), [LinkContainer.LinkRemovedFromDocument(object, RemoveFromDocEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_LinkRemovedFromDocument_System_Object_VM_Managed_RemoveFromDocEventArgs_), [LinkContainer.OnLinkReserved(ILink, object, EventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_OnLinkReserved_VM_Managed_ILink_System_Object_System_EventArgs_), [LinkContainer.CanBeDestroy(object)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_CanBeDestroy_System_Object_), [LinkContainer.DisposeManagedResources()](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_DisposeManagedResources), [LinkContainer.SetContainer(IOwned, bool)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_SetContainer_VM_Models_Pre_IOwned_System_Boolean_), [LinkContainer.OnChildUpdated(object, LinkEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_OnChildUpdated_System_Object_VM_Managed_LinkEventArgs_), [LinkContainer.OnContainerDestroy(object, LinkEventArgs)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_OnContainerDestroy_System_Object_VM_Managed_LinkEventArgs_), [LinkContainer.OnDeserialization(object)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_OnDeserialization_System_Object_), [LinkContainer.Verify(VerifiedResult)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_Verify_VM_Managed_VerifiedResult_), [LinkContainer.GetCopy(object)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_GetCopy_System_Object_), [LinkContainer.Dispose(bool)](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_Dispose_System_Boolean_), [LinkContainer.ClearChildInfoBeforeDeserialize](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_ClearChildInfoBeforeDeserialize), [LinkContainer.Container](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_Container), [LinkContainer.Owner](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_Owner), [LinkContainer.Document](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_Document), [LinkContainer.ID](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_ID), [LinkContainer.IsChildExternable](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_IsChildExternable), [LinkContainer.IsExternable](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_IsExternable), [LinkContainer.OnRemoved](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_OnRemoved), [LinkContainer.OnAdded](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_OnAdded), [LinkContainer.OnDestroy](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_OnDestroy), [LinkContainer.OnDestroying](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_OnDestroying), [LinkContainer.OnUpdate](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_OnUpdate), [LinkContainer.OnUpdating](VM.Managed.LinkContainer.md#VM_Managed_LinkContainer_OnUpdating), [LinkableBase.OnDeserialization(object)](https://github.com/AnsysVirtualMotion/DAFUL/blob/9110677a5f6a53d7604f8dfd35b4c5fceb59e8e0/DAFUL/Pre/Data/VM.Models.Pre/Models/LinkableBase.cs), ObservableObject.Dispose(), ObservableObject.RaisePropertyChanged(string), ObservableObject.RaisePropertyChanged(string, object, object), ObservableObject.Dispose(bool), ObservableObject.DisposeManagedResources(), ObservableObject.DisposeUnmanagedResources(), ObservableObject.IsDisposed, ObservableObject.TryDisposing, ObservableObject.Disposed, ObservableObject.Disposing, ObservableObject.PropertyChanged

#### Extension Methods

[LinkPropertyItemCache.GetLinkProperties(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkProperties_System_Object_VM_Models_Pre_LinkPropertyType_), [LinkPropertyItemCache.GetLinkPropertiesAndValues(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkPropertiesAndValues_System_Object_VM_Models_Pre_LinkPropertyType_), [LinkPropertyItemCache.GetLinkedObjects&lt;T&gt;(object, LinkPropertyType)](VM.Models.Pre.Cache.LinkPropertyItemCache.md#VM_Models_Pre_Cache_LinkPropertyItemCache_GetLinkedObjects__1_System_Object_VM_Models_Pre_LinkPropertyType_)

## Constructors

### <a id="VM_Managed_PointExpression__ctor_VM_Managed_VectorBase_"></a> PointExpression(VectorBase)

Initializes a new instance of the  class.

```csharp
public PointExpression(VectorBase vecPosition)

```

#### Parameters

`vecPosition` [VectorBase](VM.Managed.VectorBase.md)

Value of position.

### <a id="VM_Managed_PointExpression__ctor_System_Double_System_Double_System_Double_"></a> PointExpression(double, double, double)

Initializes a new instance of the  class.

```csharp
public PointExpression(double X, double Y, double Z)

```

#### Parameters

`X` double

Value of X.

`Y` double

Value of Y.

`Z` double

Value of Z.

### <a id="VM_Managed_PointExpression__ctor"></a> PointExpression()

Initializes a new instance of the  class.

```csharp
public PointExpression()

```

## Properties

### <a id="VM_Managed_PointExpression_Expression"></a> Expression

Gets or sets the value of point.

```csharp
protected Point Expression { get; set; }

```

#### Property Value

[Point](VM.Managed.Point.md)

### <a id="VM_Managed_PointExpression_IsParameterized"></a> IsParameterized

Get the parametric.

```csharp
public override bool IsParameterized { get; }

```

#### Property Value

bool

### <a id="VM_Managed_PointExpression_Value"></a> Value

Get the VectorBase(x, y, z).

```csharp
public override VectorBase Value { get; }

```

#### Property Value

[VectorBase](VM.Managed.VectorBase.md)

### <a id="VM_Managed_PointExpression_X"></a> X

Get the X point.

```csharp
public override double X { get; }

```

#### Property Value

double

### <a id="VM_Managed_PointExpression_Y"></a> Y

Get the Y point.

```csharp
public override double Y { get; }

```

#### Property Value

double

### <a id="VM_Managed_PointExpression_Z"></a> Z

Get the Z point.

```csharp
public override double Z { get; }

```

#### Property Value

double

## Methods

### <a id="VM_Managed_PointExpression_ChangeExpresstionForDV_System_String_System_String_"></a> ChangeExpresstionForDV(string, string)

```csharp
public void ChangeExpresstionForDV(string strOldName, string strNewName)

```

#### Parameters

`strOldName` string

`strNewName` string

### <a id="VM_Managed_PointExpression_GetSchema"></a> GetSchema()

This method is reserved and should not be used. When implementing the IXmlSerializable interface, you should return nullNothingnullptra null reference (Nothing in Visual Basic) (Nothing in Visual Basic) from this method, and instead, if specifying a custom schema is required, apply the XmlSchemaProviderAttribute to the class.

```csharp
public override XmlSchema GetSchema()

```

#### Returns

XmlSchema

### <a id="VM_Managed_PointExpression_IsParametric_VM_Managed_Primitive_enRefType_"></a> IsParametric(enRefType)

Gets parametric.

```csharp
public override bool IsParametric(Primitive.enRefType type)

```

#### Parameters

`type` [Primitive](VM.Managed.Primitive.md).[enRefType](VM.Managed.Primitive.enRefType.md)

Point picking type.

#### Returns

bool

If set to `true` is parametric; otherwise, `false` is none parametric.

### <a id="VM_Managed_PointExpression_LinkRequestUpdate_System_Object_VM_Managed_LinkEventArgs_"></a> LinkRequestUpdate(object, LinkEventArgs)

The update event occured from the linked object.

```csharp
protected override void LinkRequestUpdate(object objNotifier, LinkEventArgs arg)

```

#### Parameters

`objNotifier` object

The linked object.

`arg` [LinkEventArgs](VM.Managed.LinkEventArgs.md)

The update event information.

### <a id="VM_Managed_PointExpression_ReadXml_System_Xml_XmlReader_"></a> ReadXml(XmlReader)

Generates an object from its XML representation.

```csharp
public override void ReadXml(XmlReader reader)

```

#### Parameters

`reader` XmlReader

The XmlReader stream from which the object is deserialized.

### <a id="VM_Managed_PointExpression_Set_System_String_"></a> Set(string)

sets the expression.

```csharp
public void Set(string strPosition)

```

#### Parameters

`strPosition` string

Value of position.

### <a id="VM_Managed_PointExpression_WriteXml_System_Xml_XmlWriter_"></a> WriteXml(XmlWriter)

Converts an object into its XML representation.

```csharp
public override void WriteXml(XmlWriter writer)

```

#### Parameters

`writer` XmlWriter

The XmlWriter stream to which the object is serialized.