使用Marshal.Copy把Txt行数据转为Struct类型值

添加重要的命名空间:

using System.Runtime.InteropServices;

先建立结构相同(char长度相同)的Struct类型用于转换:

[StructLayout(LayoutKind.Sequential, Pack = 1)]public struct Employee{[MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]public char[] EmployeeId;[MarshalAs(UnmanagedType.ByValArray, SizeConst = 30)]public char[] LastName;[MarshalAs(UnmanagedType.ByValArray, SizeConst = 30)]public char[] FirstName;//这里省略很多列}

数据文本类似下面, 如这三列固定长度(6,30,30):

10001 Nick                          Yang                          
10002 Nick2                         Yang                          
10003 Nick3                         Yang                          

代码获取并转换:

        /// <summary>/// Get data from interface file/// </summary>public void GetDataFromFile(){try{string path = ConfigurationManager.ConnectionStrings["DataPath"].ConnectionString;if (File.Exists(path)){string[] rows = File.ReadAllLines(path, Encoding.UTF8);foreach (string row in rows){byte[] bytes = Encoding.UTF8.GetBytes(row);//以下为重点代码int size = Marshal.SizeOf(typeof(Employee));IntPtr buffer = Marshal.AllocHGlobal(size);try{Marshal.Copy(bytes, 0, buffer, size);//此处已经完成转换Employee emp = (Employee)Marshal.PtrToStructure(buffer, typeof(Employee));//省略很多代码
                        }catch (Exception ex){throw new Exception("Error when Copying bytes from interface to Employee", ex);}finally{Marshal.FreeHGlobal(buffer);}}}else{throw new Exception(string.Format("Error. Can`t not find the interface file at '{0}'", path));}}catch (Exception ex){throw new Exception("Error when getting data from interface file.", ex);}}