Mutex在加载Form设置时未按预期运行
本文关键字:运行 加载 Form 设置 Mutex | 更新日期: 2023-09-27 17:58:21
根据David Veeneman关于Windows窗体用户设置的Code Project文章,我一直在尝试保存应用程序的开始位置和开始大小。
它在单个实例中工作得很好,但当我将它扩展到多个实例时,我会遇到问题。
我已经完成了处理加载设置和将设置保存在互斥对象中的部分,以保护对设置文件的写入和从设置文件中的写入。
我希望窗口从最后一个已知的位置开始堆叠。大多数情况下,这似乎都很好,但如果我快速打开四五个窗户,前三个会完美打开,然后会有一个缺口,然后其中一些窗户开始在同一位置打开。
提交表单/应用程序:
private Mutex saveSetting;
private const int START_LOCATION_OFFSET = 20;
private void MainForm_Load(object sender, EventArgs e)
{
// Get the mutex before the reading of the location
// so that you can't have a situation where a window drawn
// in the incorrect position.
this.saveSetting = new Mutex(false, "SaveSetting");
this.saveSetting.WaitOne();
this.LoadWindowStartSizeAndLocation();
.
.
.
.
.
this.saveSetting.ReleaseMutex();
}
加载设置:
private void LoadWindowStartSizeAndLocation()
{
// Set window location
if (Settings.Default.WindowLocation != null)
{
System.Drawing.Point startLocation =
new System.Drawing.Point
(Settings.Default.WindowLocation.X + START_LOCATION_OFFSET,
Settings.Default.WindowLocation.Y + START_LOCATION_OFFSET);
this.Location = startLocation;
Settings.Default.WindowLocation = startLocation;
Settings.Default.Save();
}
// Set window size
if (Settings.Default.WindowSize != null)
{
this.Size = Settings.Default.WindowSize;
}
}
保存设置:
private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
{
try
{
this.SaveWindowSizeAndLocationForNextStart();
}
catch (Exception ex)
{
System.Diagnostics.Debug.Assert(false, ex.Message);
}
}
/// <summary>
/// Save the Window Size And Location For the next Application Start up.
/// </summary>
private void SaveWindowSizeAndLocationForNextStart()
{
if (this.WindowState != FormWindowState.Minimized)
{
// Copy window location to app settings
Settings.Default.WindowLocation = this.Location;
Settings.Default.WindowSize = this.Size;
}
try
{
this.saveSetting = new Mutex(false, "SaveSetting");
this.saveSetting.WaitOne();
Settings.Default.Save();
}
catch
{
// Do nothing. It won't permanently disable the system if we
// can't save the settings.
}
finally
{
this.saveSetting.ReleaseMutex();
}
}
有人能告诉我今天在做什么吗?或者,根据上面的代码,我如何将两个实例渲染到相同的起始位置??
谢谢
问题是在获取互斥之前加载设置。获取互斥后调用Settings.Default.Reload()
。