如何更改表格边框颜色 c#？

Question

I would like to change window form border color (the border with the form title). The example I found in codeplex is too much and confusing. Can any help me on something simpler?

Answer 1

Override it with:

protected override void OnPaint(PaintEventArgs e)
{
    ControlPaint.DrawBorder(e.Graphics, ClientRectangle, Color.[your_color], ButtonBorderStyle.Solid);
}

Answer 2

Unfortunately, since the form border is drawn by the Operating System, this is a complicated task . There is no real way around that.

Do NOT click the ProjectDistributor link on the CodePlex page below

The CodePlex Project for Drawing Custom Borders makes this very easy, though. Just build the form using SkinnedForm from that project instead of a standard Form, and it should work - you really don't need to do anything different in your code.

Answer 3

Workaround - Just follow these steps:

• Set FormBorderStyle to None .
• Cover the form with a panel and leave some space for border.
• Set the color you want for the border as the form back color.

Now, the panel serves as the main container and you can change the background as you want and the form serves as the border.

The Final Result

Answer 4

This works for me in Windows 10 and 11:

    private string ToBgr(Color c) => $"{c.B:X2}{c.G:X2}{c.R:X2}";

    [DllImport("DwmApi")]
    private static extern int DwmSetWindowAttribute(IntPtr hwnd, int attr, int[] attrValue, int attrSize);

    const int DWWMA_CAPTION_COLOR = 35;
    public void SetTitleBarColor(Color color, IntPtr handle)
    {
        IntPtr hWnd = handle;
        int[] colorstr = new int[] { int.Parse(ToBgr(color), System.Globalization.NumberStyles.HexNumber) };
        DwmSetWindowAttribute(hWnd, DWWMA_CAPTION_COLOR, colorstr, 4);
    }

Answer 5

Like previously mentioned, changing the actual color of the border is difficult. The solution above with the panel has limitations like you can't resize the form. I found a reasonably easy trick without a lot of the other limitations.

• Create a form
• Set FormBorderStyle to None
• Add 4 panels
• Set the background color of the panels to the color of the border you want
• Anchor one each to the top, bottom, left, and right
• Set the height(top/bottom) or width (left/right) to the thickness of the border you want. 2 or 3 looks really good.

It looks like a border, it will resize with the window, and you can drop anything else into the form you want. The limitation is, you must do this as the very first thing you add to the form.

Answer 6

在“ForeColor”下方，它们应该是一个名为“FormBorderStyle”的设置，您可以在 VisualStudio 2015 中使用该设置进行编辑。或者您可以进入控制面板路径应该是这样的“控制面板\\外观和个性化\\个性化”，它们将是一个称为“颜色”的第二个设置可以将其更改为您想要的颜色，它将所有程序中的边界颜色更改为您设置的颜色。

Answer 7

if (colorDialog1.ShowDialog() == DialogResult.OK)
{
    string color = Convert.ToString(colorDialog1.Color);
    MessageBox.Show("You change the color " + color);
    this.BackColor = colorDialog1.Color; // BackColor is only accessible for this form
}