TdxGanttControlExtendedAttributeValue.Value Property

Specifies a custom field’s value.

Declaration

property Value: Variant read; write;

Property Value

Type	Description
Variant	A custom field value.

Remarks

Use this property to assign a value to a custom field. The table below shows custom fields and data types they support:

Field Type	Supported Data Type
Cost	Currency
Date	TDateTime
Finish
Start
Duration	ISO 8601. Refer to a task‘s Duration topic for more information.
Flag	Boolean
Number	Double
Text	String

The code example below shows how to retrieve a task‘s custom field values:

Delphi

var
  ASheetOptions: TdxGanttControlChartViewSheetOptions;
  ATask: TdxGanttControlTask;
  I: Integer;
begin
  // Loads a Gantt chart from the ExtendedAttributes XML file
  dxGanttControl1.DataModel.LoadFromFile('C:\Users\Public\Documents\DevExpress\VCL\Demos\ExpressGantt Control\Data\ExtendedAttributesDemo.xml');
  // Initializes the ASheetOptions variable to a TdxGanttControlViewSheetOptions class instance
  ASheetOptions := dxGanttControl1.ViewChart.OptionsSheet;
  // Creates custom fields for all available attributes declared in the XML file
  ASheetOptions.RetrieveMissingExtendedAttributeColumns;
    // Iterates through the first summary task and its subtasks
    for I := 1 to 6 do
      begin
        ATask := dxGanttControl1.DataModel.Tasks.Items[I];
        // Displays the Text1 field values in the cxMemo editor
        cxMemo1.Lines.Add(ATask.ExtendedAttributes.Items['Text1'].Value);
      end;
end;

C++

{
  // Loads a Gantt chart from the ExtendedAttributes XML file
  dxGanttControl1->LoadFromFile("ExtendedAttributesDemo.xml");
  // Initializes the ASheetOptions variable to a TdxGanttControlViewSheetOptions class instance
  TdxGanttControlViewSheetOptions *ASheetOptions = dxGanttControl1->ViewChart->OptionsSheet;
  // Creates custom fields for all available attributes declared in the XML file
  ASheetOptions->RetrieveMissingExtendedAttributeColumns();
// Iterates through the first summary task and its subtasks
for (int I = 1; I < 7; I++)
{
  // Initializes the ATask variable to a TdxGanttControlTask class instance
  TdxGanttControlTask *ATask = dxGanttControl1->DataModel->Tasks->Items[I];
  // Displays the Text1 field values in the cxMemo editor
  cxMemo1->Lines->Add(ATask->ExtendedAttributes->Items["Text1"]->Value);
}

Refer to the TdxGanttControlExtendedAttributeCFType description for details.