Marshal.SizeOf的NotSupportedException异常问题

[dfpgb]

后面的代码在WIN32上的.Net Framework 2.0上运行没有问题
但是如果在WINCE上的.Net CompactFramework 2.0上运行则会由Marshal.SizeOf引发下面的异常

NotSupportedException
位于 System.Runtime.InteropServices.Marshal.SizeOfInternal()
位于 System.Runtime.InteropServices.Marshal.SizeOf()
位于 ConsoleApplicationMarshalMSDNDemo.Program.Main()

如果注释掉其中的那三行则不会异常

代码如下:

using System;
using System.Collections.Generic;
using System.Text;

using System.Runtime.InteropServices;
using System.Drawing;

namespace ConsoleApplicationMarshalMSDNDemo
{
    /// <summary>
    /// CALLBACK Procedure to PageSetupDlgTag structure
    /// </summary>
    public delegate Int32 Prn2CallBack(IntPtr hwnd, Int32 msg, Int32 wp, Int32 lp);

    /// <summary>
    /// PageSetupDlgTag structure
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public class PageSetupDlgTag
    {
        public Int32 lStructSize = 0;
        public IntPtr hwndOwner = IntPtr.Zero;
        public IntPtr hDevMode = IntPtr.Zero;
        public IntPtr hDevNames = IntPtr.Zero;
        public Int32 Flags = 0;
        public Point ptPaperSize;
        public Rectangle rtMinMargin;
        public Rectangle rtMargin;
        public IntPtr hInstance = IntPtr.Zero;
        public Int32 lCustData = 0;
        public Prn2CallBack lpfnPageSetupHook;;//如果注释掉这三行则不会引发异常
        public Prn2CallBack lpfnPagePaintHook;//如果注释掉这三行则不会引发异常
        public String lpPageSetupTemplateName = null;//如果注释掉这三行则不会引发异常
        public IntPtr hPageSetupTemplate = IntPtr.Zero
    } //End Class PageSetupDlgTag

    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                PageSetupDlgTag PageSetup = new PageSetupDlgTag();
                //下面的Marshal.SizeOf(PageSetup)引发了异常
                PageSetup.lStructSize = Marshal.SizeOf(PageSetup); // 84
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }

            Console.ReadLine();
        }
    }
}

[wuyq11]

检查相关参数类型是否支持

[dfpgb]

[Quote=引用 1 楼 wuyq11 的回复:]
检查相关参数类型是否支持
[/Quote]
菜鸟表示理解困难...

[xingyuebuyu]

    [StructLayout(LayoutKind.Sequential)]
    public class PageSetupDlgTag
    {
        public Int32 lStructSize = 0;
        public IntPtr hwndOwner = IntPtr.Zero;
        public IntPtr hDevMode = IntPtr.Zero;
        public IntPtr hDevNames = IntPtr.Zero;
        public Int32 Flags = 0;
        public Point ptPaperSize;
        public Rectangle rtMinMargin;
        public Rectangle rtMargin;
        public IntPtr hInstance = IntPtr.Zero;
        public Int32 lCustData = 0;
        public IntPtr lpfnPageSetupHook;;//如果注释掉这三行则不会引发异常
        public IntPtr lpfnPagePaintHook;//如果注释掉这三行则不会引发异常
        public IntPtr lpPageSetupTemplateName = null;//如果注释掉这三行则不会引发异常
        public IntPtr hPageSetupTemplate = IntPtr.Zero
    } //End Class PageSetupDlgTag



PageSetupDlgTag PageSetup = new PageSetupDlgTag();
PageSetup.lpfnPageSetupHook=Marshal.GetFunctionPointerForDelegate(d1);
PageSetup.lpfnPagePaintHook=Marshal.GetFunctionPointerForDelegate(d2);
PageSetup.lpPageSetupTemplateName=Marshal.StringToHGlobalAuto(s1);

WINCE没用过，建议全部改用IntPtr 来代替。
d1,d2是Prn2CallBack的委托实例，s1就是字符串了

[xuzysun]

不错！！

[xingyuebuyu]

Marshal.StringToHGlobalAuto方法支持平台中没有WINCE

byte[] bytes=System.Text.Encoding.Default.GetByte(s1);
IntPtr ptr = Marshal.AllocHGlobal(bytes.Length);
Marshal.Copy(bytes,0,ptr,bytes.Length);
PageSetup.lpPageSetupTemplateName=ptr;

//...不需要使用后要释放资源

Marshal.FreeHGlobal(ptr);

[dfpgb]

感谢楼上各位老大的帮助

但是我上面的代码是厂商驱动里的SDK的代码...应该不需要修改就可以用的吧...
有没有别的方向的问题呢...(比如我没引用什么东西啥的?)
厂商是外国的...国内无支持...

[None465465535]

.Net CompactFramework 2.0和.NET 2.0是2码事，Windows上能用的不一定在Windows Mobile上也能用

[dfpgb]

[Quote=引用 8 楼 virtualas 的回复:]
.Net CompactFramework 2.0和.NET 2.0是2码事，Windows上能用的不一定在Windows Mobile上也能用
[/Quote]
是的,不过SDK是FOR WINCE的....

[dfpgb]

[thestronger]

郁闷，我在vb.net中也遇到了这问题，也是在.net 中通过，在.net cf 中不能过