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Editor to share with you how to achieve Listbox self-drawing function of C#, I hope you have something to gain after reading this article, let's discuss it together!

Use the DrawMode property of the control to realize the self-drawing of the control, first set the DrawMode of C # Listbox to OwnerDrawVariable, and then implement the DrawItem, MeasuerItem method.

Write the following code:

Private void listBox1_DrawItem (object sender, DrawItemEventArgs e) {e.DrawBackground (); Rectangle r = new Rectangle (0,0, lbCustomDraw.Width, 100); bool selected = ((e.State & DrawItemState.Selected) = = DrawItemState.Selected); LinearGradientBrush lgb = null If (! selected) {lgb = new LinearGradientBrush (r, Color.Red, Color.Yellow, LinearGradientMode.Horizontal);} else {lgb = new LinearGradientBrush (r, Color.Cyan, Color.White, LinearGradientMode.Horizontal);} e.Graphics.FillRectangle (lgb, e.Bounds) E.Graphics.DrawRectangle (SystemPens.WindowText, e.Bounds); Rectangle R2 = e.bounds; string displayText = (string) lbCustomDraw.Items [e.Index]; SizeF size = e.Graphics.MeasureString (displayText, this.Font); r2.Y = (int) (r2.Height / 2)-(int) (size.Height / 2) + e.bounds.Y; r2.X = 2 E.Graphics.DrawString (displayText, this.Font, Brushes.Black, R2); e.DrawFocusRectangle ();} private void listBox1_MeasureItem (object sender, MeasureItemEventArgs e) {string displayText = (string) lbCustomDraw.Items [e.Index]; SizeF size = e.Graphics.MeasureString (displayText, this.Font); size.Height + = 10 E.ItemHeight = (int) size.Height;}

Final result:

After reading this article, I believe you have a certain understanding of "how to achieve Listbox self-drawing function in C#". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for reading!

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