如何显示＆QUOT;装载＆QUOT;覆盖Windows窗体，而形式加载它的控制（或更新他们）？ [英] How to display a "loading" overlay on windows forms while the form is loading its controls (or updating them)?
问题描述
我要找通知用户的有效方式，以一定形式正在加载（或更新），它的用户界面，而且需要几秒钟。
I'm looking for an effective way to notify the user that a given form is currently loading (or updating) it's UI and it will take few seconds.
这个月发生在初始加载或更新。由于它是非常密集和修改UI控件，这必须在UI线程上完成的，因此封锁用户。
This may occurs at initial load or at update. Since it's very intensive and modifying ui controls, this has to be done on the ui thread, and therefore blocking the user.
改变光标是不是足够多，我希望得到一个类似的效果比在阿贾克斯页，由一个半透明面板与中央的动画叠加齿轮的整个区域。
Changing the cursor is not enought, I want to get a similar effect than on ajax pages, with the whole area that is overlayed by a semi transparent panel with an animated gear on the center.
你有没有做过类似的东西了吗？或者，你知道有趣的网站，我应咨询？
Have you done something like that already? Or do you know interesting websites I should consult?
非常感谢
推荐答案
看看这个帖子与模仿上的WinForms Ajax的风格有很大的答案
Take a look at this post with a great answer that mimics the Ajax style on WinForms
的Javascript像模态窗口的WinForms的。
<一href=\"http://stackoverflow.com/questions/2698895/javascript-like-modal-window-for-winforms/3640750#3640750\">http://stackoverflow.com/questions/2698895/javascript-like-modal-window-for-winforms/3640750#3640750
Javascript Like Modal Window for WinForms.
http://stackoverflow.com/questions/2698895/javascript-like-modal-window-for-winforms/3640750#3640750
下面是一个自定义表单，会做你想要什么......改变自己的口味：
Here is a custom Form that'll do what you want... alter to your taste:
public partial class ModalLoadingUI : Form
{
#region Constants
private readonly Color BackgroundFadeColor = Color.FromArgb(50, Color.Black);
#endregion
#region Constructors
public ModalLoadingUI()
{
InitializeComponent();
}
#endregion
#region Properties
/// <summary>
/// Gets or Sets the main form that will be used as a background canvas for the loading form.
/// </summary>
public Form BackgroundForm { get; set; }
/// <summary>
/// Gets or Sets the text to displayed as the progress text.
/// </summary>
public string Title
{
get
{
return label1.Text;
}
set
{
label1.Text = value;
}
}
/// <summary>
/// Gets or Sets the value of the progress bar.
/// </summary>
public int? Progress
{
get
{
if (progressBar1.Style == ProgressBarStyle.Marquee)
{
return null;
}
else
{
return progressBar1.Value;
}
}
set
{
if (value == null)
{
progressBar1.Style = ProgressBarStyle.Marquee;
progressBar1.Value = 100;
label2.Visible = false;
}
else
{
progressBar1.Style = ProgressBarStyle.Continuous;
progressBar1.Value = value.Value;
label2.Text = string.Format("{0}%", value);
label2.Visible = true;
}
}
}
/// <summary>
/// Gets or Sets a value to indicate if the background form should be faded out.
/// </summary>
public bool UseFadedBackground { get; set; }
/// <summary>
/// Gets or Sets a value to indicate if the splash box is to be displayed.
/// </summary>
public bool UseSplashBox
{
get
{
return picShadow.Visible;
}
set
{
if (value == true)
{
picShadow.Visible = true;
panel1.Visible = true;
}
else
{
picShadow.Visible = false;
panel1.Visible = false;
}
}
}
#endregion
#region Base Events
private void ModalLoadingUI_Load(object sender, EventArgs e)
{
if (this.BackgroundForm != null)
{
this.Location = this.BackgroundForm.Location;
}
}
private void ModalLoadingUI_VisibleChanged(object sender, EventArgs e)
{
if (this.Visible == true)
{
if (this.BackgroundForm != null)
{
this.Location = this.BackgroundForm.Location;
}
}
if (System.Diagnostics.Debugger.IsAttached == true)
{
this.TopMost = false;
}
else
{
this.TopMost = true;
}
}
private void ModalLoadingUI_Shown(object sender, EventArgs e)
{
}
#endregion
#region Public Methods
/// <summary>
/// Paints the background form as the background of this form, if one is defined.
/// </summary>
public void CaptureBackgroundForm()
{
if (this.InvokeRequired)
{
this.BeginInvoke(new MethodInvoker(CaptureBackgroundForm));
return;
}
if (this.BackgroundForm == null)
{
return;
}
var bmpScreenshot = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb);
Graphics g = Graphics.FromImage(bmpScreenshot);
try
{
// COPY BACKGROUND
int x = this.BackgroundForm.Left;
int y = this.BackgroundForm.Top;
var size = this.BackgroundForm.Size;
g.CopyFromScreen(x, y, 0, 0, size, CopyPixelOperation.SourceCopy);
// FADE IF DESIRED
if (this.UseFadedBackground == true)
{
var rect = new Rectangle(0, 0, size.Width, size.Height);
g.FillRectangle(new SolidBrush(BackgroundFadeColor), rect);
}
// PAINT SPLASH BOX SHADOW IF DESIRED
if(this.UseSplashBox == true)
{
PaintPanelShadow(g);
}
}
catch (Exception e)
{
g.Clear(Color.White);
}
this.BackgroundImage = bmpScreenshot;
}
/// <summary>
/// Paints a shadow around the panel, if one is defined.
/// </summary>
/// <param name="g">The graphics object to paint into</param>
private void PaintPanelShadow(Graphics g)
{
var shadowImage = picShadow.Image;
var x = panel1.Left + (panel1.Width / 2) - (shadowImage.Width / 2);
var y = panel1.Top + (panel1.Height / 2) - (shadowImage.Height / 2);
g.DrawImage(shadowImage, x, y, shadowImage.Width, shadowImage.Height);
}
#endregion
}
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