HasChanged Property (DataItemCollection)

Indicates when this object needs to be written to persistent storage.

Syntax

Visual Basic
C#
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Property HasChanged As Boolean

'Usage
 
Dim instance As DataItemCollection
Dim value As Boolean
 
instance.HasChanged = value
 
value = instance.HasChanged

public bool HasChanged {get; set;}

public: __property bool get_HasChanged();
public: __property void set_HasChanged( 
   bool value
);

public:
property bool HasChanged {
   bool get();
   void set (    bool value);
}

Remarks

true if any persistent part of this object has changed; otherwise false. When FormSetFile writes the properties (including this DataItemCollection) of a FormSet object to a form set file, or when it reads those properties from a form set file, it will reset this property to false. The same is true when FormDefinitionFile reads or writes a FormDefinition that includes this object.

The persistent parts of this object are the collection itself and the persistent parts of every DataItem object in the collection. When you change any of them, this property will automatically change to true.

You can also set the value of this property. If you set it to false, it will also set the HasChanged property of each object in the collection to false.

Default value: false

Reference

DataItemCollection Class
DataItemCollection Members
DataItem.HasChanged Property
FormSet.Read Method
FormSet.Write Method
FormDefinition.Read Method
FormDefinition.Write Method