我有以下代码。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using MapsApp.DB;
namespace MapsApp
{
public partial class _Default : System.Web.UI.Page
{
[DLLImport("GeoUrbanApp.exe")]
public static extern double CalcFigure(double east, double north, double size);
...
我想调用.exe中的CalcFigure函数。我在引用中添加了它,并试图导入它。我得到的结果是
The type or namespace name 'DLLImport' could not be found (are you missing a using directive or an assembly reference?)
The type or namespace name 'DLLImportAttribute' could not be found (are you missing a using directive or an assembly reference?)
大多数人在网上找到的解决方案是 "使用System.Runtime.InteropServices;"但我有它。
它是 DllImport
不 DLLImport
:)
尝试添加
using System.Runtime.InteropServices;
到你的类中,这就是你的类的命名空间 DllImportAttribute
居住在: