Chart.GetChartElement Method

Gets information about the chart element at specified X and Y coordinates.

Namespace:  Microsoft.Office.Tools.Excel
Assembly:  Microsoft.Office.Tools.Excel (in Microsoft.Office.Tools.Excel.dll)

Syntax

'Declaration
Sub GetChartElement ( _
    x As Integer, _
    y As Integer, _
    ByRef ElementID As Integer, _
    ByRef Arg1 As Integer, _
    ByRef Arg2 As Integer _
)

void GetChartElement(
    int x,
    int y,
    ref int ElementID,
    ref int Arg1,
    ref int Arg2
)

Parameters

• x
  Type: System.Int32

  The X coordinate of the chart element.

• y
  Type: System.Int32

  The Y coordinate of the chart element.

• ElementID
  Type: System.Int32%

  When the method returns, this argument contains the XlChartItem value of the chart element at the specified coordinates. For more information, see the "Remarks" section.

• Arg1
  Type: System.Int32%

  When the method returns, this argument contains information related to the chart element. For more information, see the "Remarks" section.

• Arg2
  Type: System.Int32%

  When the method returns, this argument contains information related to the chart element. For more information, see the "Remarks" section.

Remarks

This method is unusual in that you specify values for only the first two arguments. Microsoft Office Excel fills in the other arguments, and your code should examine those values when the method returns.

The value of ElementID after the method returns determines whether Arg1 and Arg2 contain any information, as shown in the following table.

ElementID	Arg1	Arg2
xlAxis	AxisIndex	AxisType
xlAxisTitle	AxisIndex	AxisType
xlDisplayUnitLabel	AxisIndex	AxisType
xlMajorGridlines	AxisIndex	AxisType
xlMinorGridlines	AxisIndex	AxisType
xlPivotChartDropZone	DropZoneType	None
xlPivotChartFieldButton	DropZoneType	PivotFieldIndex
xlDownBars	GroupIndex	None
xlDropLines	GroupIndex	None
xlHiLoLines	GroupIndex	None
xlRadarAxisLabels	GroupIndex	None
xlSeriesLines	GroupIndex	None
xlUpBars	GroupIndex	None
xlChartArea	None	None
xlChartTitle	None	None
xlCorners	None	None
xlDataTable	None	None
xlFloor	None	None
xlLeaderLines	None	None
xlLegend	None	None
xlNothing	None	None
xlPlotArea	None	None
xlWalls	None	None
xlDataLabel	SeriesIndex	PointIndex
xlErrorBars	SeriesIndex	None
xlLegendEntry	SeriesIndex	None
xlLegendKey	SeriesIndex	None
xlSeries	SeriesIndex	PointIndex
xlShape	ShapeIndex	None
xlTrendline	SeriesIndex	TrendLineIndex
xlXErrorBars	SeriesIndex	None
xlYErrorBars	SeriesIndex	None

The following table describes the meaning of Arg1 and Arg2 after the method returns.

Argument	Description
AxisIndex	Specifies whether the axis is primary or secondary. Can be one of the following XlAxisGroup constants: xlPrimary or xlSecondary.
AxisType	Specifies the axis type. Can be one of the following XlAxisType constants: xlCategory, xlSeriesAxis, or xlValue.
DropZoneType	Specifies the drop zone type: column, data, page, or row field. Can be one of the following XlPivotFieldOrientation constants: xlColumnField, xlDataField, xlPageField, or xlRowField. The column and row field constants specify the series and category fields, respectively.
GroupIndex	Specifies the offset within the ChartGroups collection for a specific chart group.
PivotFieldIndex	Specifies the offset within the PivotFields collection for a specific column (series), data, page, or row (category) field. -1 if the drop zone type is xlDataField.
PointIndex	Specifies the offset within the Points collection for a specific point within a series. A value of – 1 indicates that all data points are selected.
SeriesIndex	Specifies the offset within the Series collection for a specific series.
ShapeIndex	Specifies the offset within the Shapes collection for a specific shape.
TrendlineIndex	Specifies the offset within the Trendlines collection for a specific trendline within a series.

Examples

The following code example creates a Microsoft.Office.Tools.Excel.Chart and then uses the GetChartElement method to display the chart element when a user clicks the chart.

WithEvents elementChart As Microsoft.Office.Tools.Excel.Chart

Private Sub DisplayChartElement()
    Globals.Sheet1.Range("A1", "A5").Value2 = 22
    Globals.Sheet1.Range("B1", "B5").Value2 = 55

    elementChart = Me.Controls.AddChart(Me.Range("D2", "H12"), _
        "elementChart")
    elementChart.SetSourceData(Globals.Sheet1.Range("A1", "B5"), _
        Excel.XlRowCol.xlColumns)
    elementChart.ChartType = Excel.XlChartType.xl3DColumn
End Sub 

Sub elementChart_MouseDownHandler(ByVal Button As Integer, ByVal Shift As Integer, _
    ByVal x As Integer, ByVal y As Integer) Handles elementChart.MouseDown

    Dim elementID As Integer = 0
    Dim arg1 As Integer = 0
    Dim arg2 As Integer = 0

    elementChart.GetChartElement(x, y, elementID, arg1, arg2)

    MsgBox("Chart element is: " & CType(elementID, Excel.XlChartItem).ToString() _
            & Constants.vbNewLine & "arg1 is: " & arg1.ToString() _
            & Constants.vbNewLine & "arg2 is: " & arg2.ToString())
End Sub

private Microsoft.Office.Tools.Excel.Chart elementChart;

private void DisplayChartElement()
{
    this.Range["A1", "A5"].Value2 = 22;
    this.Range["B1", "B5"].Value2 = 55;

    elementChart = this.Controls.AddChart(this.Range["D2", "H12"],
        "elementChart");

    elementChart.SetSourceData(this.Range["A1", "B5"],
        Excel.XlRowCol.xlColumns);
    elementChart.ChartType = Excel.XlChartType.xl3DColumn;
    elementChart.MouseDown +=
        new Excel.ChartEvents_MouseDownEventHandler(elementChart_MouseDown);
}

void elementChart_MouseDown(int Button, int Shift, int x, int y)
{
    Int32 elementID = 0;
    Int32 arg1 = 0;
    Int32 arg2 = 0;

    elementChart.GetChartElement(x, y, ref elementID, ref arg1, ref arg2);

    MessageBox.Show("Chart element is: " + ((Excel.XlChartItem)elementID).ToString()
        + "\n arg1 is: " + arg1.ToString() + "\n arg2 is: " + arg2.ToString());
}

.NET Framework Security

• Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

See Also

Reference

Chart Interface

Microsoft.Office.Tools.Excel Namespace