Creating a Zoom Effect

To create a zoom effect with the chart, simply adjust the axis. For example, you can add two button controls (Zoom in and Zoom out buttons) to your application which will adjust the axis at run time when each is pressed. Here is a code example showing how to handle the Button_Click events to control zooming:

' Controls zooming in

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim xMin As Double = Me.C1Chart1.ChartArea.AxisX.Min

Dim xMax As Double = Me.C1Chart1.ChartArea.AxisX.Max

    Dim xChange As Double = (xMax - xMin) * 0.05

Me.C1Chart1.ChartArea.AxisX.Min = xMin + xChange

Me.C1Chart1.ChartArea.AxisX.Max = xMax - xChange

    Dim yMin As Double = Me.C1Chart1.ChartArea.AxisY.Min()

Dim yMax As Double = Me.C1Chart1.ChartArea.AxisY.Max

    Dim yChange As Double = (yMax - yMin) * 0.05

Me.C1Chart1.ChartArea.AxisY.Min = yMin + yChange

Me.C1Chart1.ChartArea.AxisY.Max = yMax - yChange

End Sub

' Controls zooming out

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

Dim xMin As Double = Me.C1Chart1.ChartArea.AxisX.Min

Dim xMax As Double = Me.C1Chart1.ChartArea.AxisX.Max

    Dim xChange As Double = (xMax - xMin) * 0.05

Me.C1Chart1.ChartArea.AxisX.Min = xMin - xChange

Me.C1Chart1.ChartArea.AxisX.Max = xMax + xChange

    Dim yMin As Double = Me.C1Chart1.ChartArea.AxisY.Min()

Dim yMax As Double = Me.C1Chart1.ChartArea.AxisY.Max

    Dim yChange As Double = (yMax - yMin) * 0.05

Me.C1Chart1.ChartArea.AxisY.Min = yMin - yChange

Me.C1Chart1.ChartArea.AxisY.Max = yMax + yChange

End Sub

// Controls zooming in

private void button1_Click(object sender, System.EventArgs e)

    double xMin = this.c1Chart1.ChartArea.AxisX.Min;

    double xMax = this.c1Chart1.ChartArea.AxisX.Max;

    double xChange = (xMax - xMin) * 0.05;

    this.c1Chart1.ChartArea.AxisX.Min = xMin + xChange;

    this.c1Chart1.ChartArea.AxisX.Max = xMax - xChange;

    double yMin = this.C1Chart1.ChartArea.AxisY.Min();

    double yMax = this.C1Chart1.ChartArea.AxisY.Max;

    double yChange = (yMax - yMin) * 0.05;

    this.c1Chart1.ChartArea.AxisY.Min = yMin + yChange;

    this.c1Chart1.ChartArea.AxisY.Max = yMax - yChange;

// Controls zooming out

private void button2_Click(object sender, System.EventArgs e)

    double xMin = this.c1Chart1.ChartArea.AxisX.Min;

    double xMax = this.c1Chart1.ChartArea.AxisX.Max;

    double xChange = (xMax - xMin) * 0.05;

    this.c1Chart1.ChartArea.AxisX.Min = xMin - xChange;

    this.c1Chart1.ChartArea.AxisX.Max = xMax + xChange;

    double yMin = this.c1Chart1.ChartArea.AxisY.Min();

    double yMax = this.c1Chart1.ChartArea.AxisY.Max;

    double yChange = (yMax - yMin) * 0.05;

    this.c1Chart1.ChartArea.AxisY.Min = yMin - yChange;

    this.c1Chart1.ChartArea.AxisY.Max = yMax + yChange;