问题:

alt text http://img13.imageshack.us/img13/5215/20091217052234.png

this line ?

回答1:

It's a bug in the "system" renderer, details in this bug report.

Microsoft's response gives a very easy workaround:

1) Create a subclass of ToolStripSystemRenderer, overriding OnRenderToolStripBorder and making it a no-op:

public class MySR : ToolStripSystemRenderer {     public MySR() { }      protected override void OnRenderToolStripBorder(ToolStripRenderEventArgs e)     {         //base.OnRenderToolStripBorder(e);     } }

2) Use that renderer for your toolstrip:

toolStrip3.Renderer = new MySR();

回答2:

You might want to add type check to avoid missing border on ToolStripDropDownMenu/etc. (since inherited from ToolStrip, it starts same custom renderer usage automatically):

protected override void OnRenderToolStripBorder(ToolStripRenderEventArgs e) {     if (e.ToolStrip.GetType() == typeof(ToolStrip))     {          // skip render border     }     else     {         // do render border         base.OnRenderToolStripBorder(e);     } }

Missed ToolStripDropDownMenu border is not so noticable while using ToolStripSystemRenderer but become real eyesore with ToolStripProfessionalRenderer.

Also, setting System.Windows.Forms.ToolStripManager.Renderer = new MySR(); could be usefull if you want all ToolStrip instances appwide to use MySR by default.

转载请标明出处:How to disable the line under tool strip in winform c#?

文章来源: How to disable the line under tool strip in winform c#?

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