添加重要的命名空間:

using System.Runtime.InteropServices;

先建立結構相同(char長度相同)的Struct類型用于轉換:

[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;//這里省略很多列}

數據文本類似下面, 如這三列固定長度(6,30,30):

10001 Nick Yang 10002 Nick2 Yang 10003 Nick3 Yang

代碼獲取并轉換:

/// <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);//以下為重點代碼int size = Marshal.SizeOf(typeof(Employee));IntPtr buffer = Marshal.AllocHGlobal(size);try{Marshal.Copy(bytes, 0, buffer, size);//此處已經完成轉換Employee emp = (Employee)Marshal.PtrToStructure(buffer, typeof(Employee));//省略很多代碼 }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);}}

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轉載于:https://www.cnblogs.com/xachary/p/3745063.html

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