ProgressBar 的颜色没有改变 c# [英] Color of ProgressBar is not changing c#
本文介绍了ProgressBar 的颜色没有改变 c#的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我的要求是每当我单击按钮时将进度条的颜色更改为红色.我不想注释掉 Application.EnableVisualStyles().
My requirement is to change the color of progress bar to red whenever I click a button. I don't want to comment out Application.EnableVisualStyles().
所以我尝试使用 SendMessage.我的代码:
So I tried using SendMessage. My code:
[DllImport("user32.dll")]
private static extern bool SendMessage(IntPtr hWnd, Int32 msg, Int32 wParam, Int32 lParam);
private const Int32 WM_USER = 0x0400;
private const Int32 CCM_FIRST = 0x2000;
private const Int32 PBM_SETBARCOLOR = WM_USER + 9;
private const Int32 PBM_SETBKCOLOR = CCM_FIRST + 1;
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
this.Invoke((MethodInvoker)delegate
{
SendMessage(this.progressBar1.Handle, PBM_SETBARCOLOR, 0, ColorTranslator.ToWin32(Color.Red));
SendMessage(this.progressBar1.Handle, PBM_SETBKCOLOR, 0, ColorTranslator.ToWin32(Color.Red));
progressBar1.Style = ProgressBarStyle.Continuous;
progressBar1.Value = progressBar1.Maximum;
});
}
它不起作用.我不知道为什么.你能帮忙吗
It is not working. I don't know why. Can u please help
推荐答案
如果您想将 ProgressBar 颜色从初始绿色更改为 红色(这是一种标准状态)你可以简单地做
If you want to change ProgressBar color from initial Green to Red (which is a standard state) you can do simply
https://msdn.microsoft.com/ru-ru/library/windows/desktop/bb760850(v=vs.85).aspx
// 1040 - PBM_SETSTATE
// 2 - red (error), 3 - yellow (paused), 1 - green (in progress)
SendMessage(progressBar1.Handle, 1040, 2, 0);
实现:
this.Invoke(() => {
progressBar1.Value = progressBar1.Maximum;
progressBar1.Style = ProgressBarStyle.Continuous;
SendMessage(progressBar1.Handle, 1040, 2, 0);
});
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