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How to draw indicators in the indicator margin of the WinForms SyntaxEditor (EditControl)?

Platform: WinForms |
Control: EditControl |
Published Date: April 30, 2011 |
Last Revised Date: December 13, 2019

Draw indicator in indicator margin

The indicators can be set in the indicator margin area by handling the DrawLineMark event associated with the EditControl as shown in code below.

C#

private void editControl1_DrawLineMark(object sender, Syncfusion.Windows.Forms.Edit.DrawLineMarkEventArgs e)
{
    if( e.VirtualLine % 2 == 0 )
    {
        Brush brush = new SolidBrush(Color.LightSalmon);
        e.Graphics.FillRectangle(brush, e.MarkRect);
        e.Graphics.DrawRectangle(Pens.IndianRed, e.MarkRect);
    }
}

 

VB

Private Sub editControl1_DrawLineMark(sender As Object, e As Syncfusion.Windows.Forms.Edit.DrawLineMarkEventArgs) Handles editControl1.DrawLineMark
     If e.VirtualLine Mod 2 = 0 Then
         Dim brush = New SolidBrush(Color.LightSalmon)
         e.Graphics.FillRectangle(brush, e.MarkRect)
         e.Graphics.DrawRectangle(Pens.IndianRed, e.MarkRect)
     End If
End Sub 'editControl1_DrawLineMark

 

Reference link: https://help.syncfusion.com/windowsforms/syntaxeditor/events#drawlinemark-event

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