CODEWITHSUNDEEP
c#.netwinformsmschartmousehover
C.User
C.User

Reputation: 163

C# MSChart add hover Line

When you click into a mschart a red line appears, is it somehow possible to add this line while hovering over the chart? I would like to make this line visible while hovering and add the result of the hovered datapoint under the line or something like that. So far I only found out about tooltip and was able to use it and show values of datapoint while hovering over it.
If you dont know about what line I'm talking:
enter image description here

Upvotes: 1

Views: 334

Answers (1)

Reza Aghaei
Reza Aghaei

Reputation: 125197

You can handle MouseHover event of the chart and get the data point and then set the cursor position SetCursorPosition: 

private void chart1_MouseHover(object sender, EventArgs e)
{
    var p = chart1.PointToClient(MousePosition);
    chart1.ChartAreas[0].CursorX.SetCursorPixelPosition(p, true);
}

You also need to handle MouseMove and call protected ResetMouseEventArgs method of the control to raise MouseHover as expected:

private void chart1_MouseMove(object sender, MouseEventArgs e)
{
    var ResetMouseEventArgs= 
        chart1.GetType().GetMethod("ResetMouseEventArgs",
        System.Reflection.BindingFlags.NonPublic |
        System.Reflection.BindingFlags.Instance);
    ResetMouseEventArgs.Invoke(chart1, null);
}

Upvotes: 2

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