我使用自定義字體和定時器標籤中的值發生變化的標籤。我的應用程序開始最小化。當我顯示應用程序時,有時會顯示異常並且標籤中的文字是紅色的。使用自定義字體在標籤中繪製文本時參數無效
這裏我嘗試調用異步方法用於標籤文本變化
private void timer1_Tick(object sender, EventArgs e)
{
// create a delegate of MethodInvoker poiting to showTime function.
MethodInvoker simpleDelegate = new MethodInvoker(showTime);
// Calling showTime Async
simpleDelegate.BeginInvoke(null, null);
}
字體加載
public Form1()
{
InitializeComponent();
SystemEvents.SessionSwitch += new SessionSwitchEventHandler(SystemEvents_SessionSwitch); //event handler for windows lock
File.WriteAllBytes(appPath + "\\font.ttf", Resources.font); //copy font from resources
try
{
PrivateFontCollection pfc = new PrivateFontCollection();
pfc.AddFontFile(appPath + @"/font.ttf");
label1.Font = new Font(pfc.Families[0], 11, FontStyle.Bold);
}
catch
{
MessageBox.Show("Failed to load nice font." + "\r\n" + "Using standart font instead.", "Time app", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
這裏是標籤TET變化的方法
private void showTime()
{
label1.Text = time.ToString();
}
** * ** 異常文本 ** * ****
System.ArgumentException: Parameter is not valid.
at System.Drawing.FontFamily.GetName(Int32 language)
at System.Drawing.FontFamily.get_Name()
at System.Windows.Forms.Internal.WindowsFont.FromFont(Font font, WindowsFontQuality fontQuality)
at System.Windows.Forms.Internal.WindowsGraphicsCacheManager.GetWindowsFont(Font font, WindowsFontQuality fontQuality)
at System.Windows.Forms.TextRenderer.MeasureText(String text, Font font, Size proposedSize, TextFormatFlags flags)
at System.Windows.Forms.Layout.LayoutUtils.MeasureTextCache.GetUnconstrainedSize(String text, Font font, TextFormatFlags flags)
at System.Windows.Forms.Layout.LayoutUtils.MeasureTextCache.TextRequiresWordBreak(String text, Font font, Size size, TextFormatFlags flags)
at System.Windows.Forms.Label.CreateTextFormatFlags(Size constrainingSize)
at System.Windows.Forms.Label.CreateTextFormatFlags()
at System.Windows.Forms.Label.OnPaint(PaintEventArgs e)
at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
at System.Windows.Forms.Control.WmPaint(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Label.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
問題:如何在使用自定義的字體林擺脫這種異常?
404:
移動實例的方法外,以防止從GC收集它。也許類似的信息可以在http://dotnet-coding-helpercs.blogspot.com/2009/06/how-to-embed-true-type-font-in-using-c.html? – erdomke 2013-05-23 19:02:46