c#调用DLL文件发生错误！！请高手指点，急~~

[呦呦]

c#调用DLL文件发生错误！！应用程序发生错误，未知的软件异常

[DllImport("idcarddll.dll", EntryPoint = "RecogNewIdcardALL ",
                CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int RecogNewIdcardALL(string imgfile_name, ref IDCARD idcard, bool bSaveResultFile, int nContent, string HeadImgFName);

结构体
 public struct IDCARD
        {
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 7)] 
            public string name; //姓名
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 10)]
            public string sex;  //性别
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 20)]
            public string people;  //民族，
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 50)]
            public string birthday; //出生日期
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 200)]
            public string address; //地址，
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 50)]
            public string signdate; //签发日期，
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 10)]
            public string validterm;  //有效期，
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 40)]
            public string number; //证件编码，
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 100)]
            public string other; //备用，
        };

[呦呦]

高手快来呀，急~~

[呦呦]

就快要大功告成了！！高手快来呀~~

[dingxuewhlg]

不懂
只能够帮顶了……

[呦呦]

天呐，高手都哪去啦~~快救命啊！！

[zhirom]

会不会是Ansi和unicode的问题哦

[li45214521]

public fixed byte name[7];