c# - 在 Visual Studio 中，如何从项目资源文件夹加载 .png 图像？

Question

我正在尝试为 Windows Mobile 开发一个应用程序PDA ，但我在从资源文件夹获取 .png 图像时遇到问题。

我在项目 Resources 文件夹中有许多图像，我想做的就是以编程方式(即仅使用代码)使用项目 Resources 文件夹中的背景图像绘制图像框。

例如:

  PictureBox pictureBoxBlueCounter = new PictureBox();

  //pictureBoxBlueCounter = new System.Windows.Forms.PictureBox();
  pictureBoxBlueCounter.Image = global::StrikeOutMobile.Properties.Resources.counter_square_blue;
  pictureBoxBlueCounter.Location = new System.Drawing.Point(30, 30);
  pictureBoxBlueCounter.Name = "pictureBoxblueCounter";
  pictureBoxBlueCounter.Size = new System.Drawing.Size(240, 210);
  pictureBoxBlueCounter.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
  Controls.Add(pictureBoxBlueCounter);

目前上面的代码给我一个“TargetInvocationException was unhandled”错误，我不知道如何修复它!

我该如何解决？

这里是完整的 TargetInvocationException 信息:

  System.Reflection.TargetInvocationException was unhandled
  Message="TargetInvocationException"
  StackTrace:
       at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
       at System.Reflection.ConstructorInfo.Invoke(Object[] parameters)
       at System.Resources.ResourceReader.CreateResource(Type objType, Type[] ctorParamTypes, Object[] ctorParameters)
       at System.Resources.ResourceReader.LoadBitmap(Int32 typeIndex)
       at System.Resources.ResourceReader.LoadObjectV2(Int32 pos, ResourceTypeCode& typeCode)
       at System.Resources.ResourceReader.LoadObject(Int32 pos, ResourceTypeCode& typeCode)
       at System.Resources.RuntimeResourceSet.GetObject(String key, Boolean ignoreCase)
       at System.Resources.ResourceManager.GetObject(String name, CultureInfo culture)
       at StrikeOutMobile.Properties.Resources.get_counter_square_blue()
       at StrikeOutMobile.FormGameBoard.drawBlue()
       at StrikeOutMobile.FormGameBoard.menuItemPosition1_Click(Object sender, EventArgs e)
       at System.Windows.Forms.MenuItem.OnClick(EventArgs e)
       at System.Windows.Forms.Menu.ProcessMnuProc(Control ctlThis, WM wm, Int32 wParam, Int32 lParam)
       at System.Windows.Forms.Form.WnProc(WM wm, Int32 wParam, Int32 lParam)
       at System.Windows.Forms.Control._InternalWnProc(WM wm, Int32 wParam, Int32 lParam)
       at Microsoft.AGL.Forms.EVL.EnterModalDialog(IntPtr hwnModal)
       at System.Windows.Forms.Form.ShowDialog()
       at StrikeOutMobile.Main.menuItem1_Click(Object sender, EventArgs e)
       at System.Windows.Forms.MenuItem.OnClick(EventArgs e)
       at System.Windows.Forms.Menu.ProcessMnuProc(Control ctlThis, WM wm, Int32 wParam, Int32 lParam)
       at System.Windows.Forms.Form.WnProc(WM wm, Int32 wParam, Int32 lParam)
       at System.Windows.Forms.Control._InternalWnProc(WM wm, Int32 wParam, Int32 lParam)
       at Microsoft.AGL.Forms.EVL.EnterMainLoop(IntPtr hwnMain)
       at System.Windows.Forms.Application.Run(Form fm)
       at StrikeOutMobile.Program.Main()

  InnerException:
       Message="Exception"
       StackTrace:
            at Microsoft.AGL.Common.MISC.HandleAr(PAL_ERROR ar)
            at System.Drawing.Bitmap._InitFromMemoryStream(MemoryStream mstream)
            at System.Drawing.Bitmap..ctor(Stream stream)
            at System.Reflection.RuntimeConstructorInfo.InternalInvoke(RuntimeConstructorInfo rtci, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess, StackCrawlMark& stackMark)
            at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
            at System.Reflection.ConstructorInfo.Invoke(Object[] parameters)
            at System.Resources.ResourceReader.CreateResource(Type objType, Type[] ctorParamTypes, Object[] ctorParameters)
            at System.Resources.ResourceReader.LoadBitmap(Int32 typeIndex)
            at System.Resources.ResourceReader.LoadObjectV2(Int32 pos, ResourceTypeCode& typeCode)
            at System.Resources.ResourceReader.LoadObject(Int32 pos, ResourceTypeCode& typeCode)
            at System.Resources.RuntimeResourceSet.GetObject(String key, Boolean ignoreCase)
            at System.Resources.ResourceManager.GetObject(String name, CultureInfo culture)
            at StrikeOutMobile.Properties.Resources.get_counter_square_blue()
            at StrikeOutMobile.FormGameBoard.drawBlue()
            at StrikeOutMobile.FormGameBoard.menuItemPosition1_Click(Object sender, EventArgs e)
            at System.Windows.Forms.MenuItem.OnClick(EventArgs e)
            at System.Windows.Forms.Menu.ProcessMnuProc(Control ctlThis, WM wm, Int32 wParam, Int32 lParam)
            at System.Windows.Forms.Form.WnProc(WM wm, Int32 wParam, Int32 lParam)
            at System.Windows.Forms.Control._InternalWnProc(WM wm, Int32 wParam, Int32 lParam)
            at Microsoft.AGL.Forms.EVL.EnterModalDialog(IntPtr hwnModal)
            at System.Windows.Forms.Form.ShowDialog()
            at StrikeOutMobile.Main.menuItem1_Click(Object sender, EventArgs e)
            at System.Windows.Forms.MenuItem.OnClick(EventArgs e)
            at System.Windows.Forms.Menu.ProcessMnuProc(Control ctlThis, WM wm, Int32 wParam, Int32 lParam)
            at System.Windows.Forms.Form.WnProc(WM wm, Int32 wParam, Int32 lParam)
            at System.Windows.Forms.Control._InternalWnProc(WM wm, Int32 wParam, Int32 lParam)
            at Microsoft.AGL.Forms.EVL.EnterMainLoop(IntPtr hwnMain)
            at System.Windows.Forms.Application.Run(Form fm)
            at StrikeOutMobile.Program.Main()

Answer 1

好吧，像往常一样，我小题大做了!

这是我解决问题的方法:

private void menuItemPosition1_Click(object sender, EventArgs e)
{
    Graphics graphicsCanvas = this.pictureBoxBoard.CreateGraphics();
    graphicsCanvas.DrawImage(global::StrikeOutMobile.Properties.Resources.counter_square_blue, 60, 60);
}

private void pictureBoxBoard_Paint(object sender, PaintEventArgs e)
{

}

事实证明我需要一个 Canvas (就像我在 J2ME 中那样)，但与 J2ME 不同的是，这个 Canvas 实际上不需要做任何事情。

我不知道为什么会这样，但确实如此!

此外，我还要非常感谢 Qberticus 和 Nick Guerrera 所做的努力!