MS-Chart Zooming of x-axis with scroll bar in c#
I have added the scroll bar to the x-axis of my mschart control using this link Adding a scroll bar to MS Chart control C# and it worked as expected. But now my requirement is, I need zooming for both the axis. But since I removed Zoom reset button for x-axis, I have used the following to reset it by forcing.
private void chart1_开发者_JAVA技巧AxisScrollBarClicked(object sender, ScrollBarEventArgs e)
{
// Handle zoom reset button
if(e.ButtonType == ScrollBarButtonType.ZoomReset)
{
// Event is handled, no more processing required
e.IsHandled = true;
// Reset zoom on X and Y axis
chart1.ChartAreas[0].AxisX.ScaleView.ZoomReset();
chart1.ChartAreas[0].AxisY.ScaleView.ZoomReset();
}
}
But it is not working properly. Please help me in fixing this in c#..
Try using ZoomReset(0)
.
private void zeroZoom_Click(object sender, EventArgs e)
{
chart1.ChartAreas[0].AxisX.ScaleView.ZoomReset(0);
chart1.ChartAreas[0].AxisY.ScaleView.ZoomReset(0);
}
The first thing coming in mind, is that your problem is related to multiple zooming.
As you had noticed, by default the zoom-reset button (exactly like the ZoomReset method) doesn't reset the zoom completely, but restore the previous view-status, i.e. if you have zoomed more than one time, it returns just to the previous zoomed view.
To completely reset the zoom, you can use this code:
while (chart1.ChartAreas[0].AxisX.ScaleView.IsZoomed)
chart1.ChartAreas[0].AxisX.ScaleView.ZoomReset();
while (chart1.ChartAreas[0].AxisY.ScaleView.IsZoomed)
chart1.ChartAreas[0].AxisY.ScaleView.ZoomReset();
Conversely, if you like the default zoom-reset behaviour, you should have two buttons for the two axis because it's possible to have different number of view-statex for the different axis.
Another possibility, is that you are zooming a secondary axis, like AxisX2
or AxisY2
(not sure, but I think that is depending on the chart type), so you should reset those (or, to be safe, just reset all axis...).
I tried with the below code today and it seems like working fine. Here the for loop handles the X axis with scroll and the next if block handles the ordinary X-axis. Could you please have a glance at it and let me know your views about it?
private void chart1_AxisScrollBarClicked(object sender, ScrollBarEventArgs e)
{
Boolean blnIsXaxisReset = false;
try
{
// Handle zoom reset button
if(e.ButtonType == ScrollBarButtonType.ZoomReset)
{
// Event is handled, no more processing required
e.IsHandled = true;
// Reset zoom on Y axis
while (chart1.ChartAreas[0].AxisY.ScaleView.IsZoomed)
chart1.ChartAreas[0].AxisY.ScaleView.ZoomReset();
//Handles Zoom reset on X axis with scroll bar
foreach (Series series in chart1.Series)
{
if (series.YAxisType == AxisType.Secondary)
{
chart1.ChartAreas[0].AxisX.ScaleView.Zoom(-10, 10);
blnIsXaxisReset = true;
break;
}
}
//Handles Zoom reset on ordinary X axis
if (blnIsXaxisReset == false)
{
while (chart1.ChartAreas[0].AxisX.ScaleView.IsZoomed)
chart1.ChartAreas[0].AxisX.ScaleView.ZoomReset();
}
}
}
catch (Exception ex)
{
BuildException buildException = new BuildException();
buildException.SystemException = ex;
buildException.CustomMessage = "Error in zooming the Chart";
ExceptionHandler.HandleException(buildException);
}
}
Thanks for your effort!!
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