如何在课程中添加图像列表？

Question

注意：该类在我的项目中实现的我的外部DLL中。 在我的班级图书馆里，有这个班Annuncio 里面有一个清单。 该列表必须包含图像，但是我的代码给我一个错误。

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

namespace BuyNowDLL
{
    class Annuncio
    {
       public List<Image> Images1 = new List<Image>();  //Make me error (Image)
    }
}

我该如何解决？

enter image description here

Answer 1

您的代码没有任何错误，这是因为您没有引用System.Drawing.dll

在解决方案资源管理器中右键单击项目名称，然后单击“添加”>“引用”

然后在程序集列表中选择选中{ "name": "RNNProject", "version": "0.0.1", "private": true, "scripts": { "start": "node node_modules/react-native/local-cli/cli.js start", "test": "jest" }, "dependencies": { "react": "16.8.3", "react-native": "0.59.1", "react-native-navigation": "^2.15.0" }, "devDependencies": { "@babel/core": "7.4.0", "@babel/runtime": "7.4.2", "babel-jest": "24.5.0", "jest": "24.5.0", "metro-react-native-babel-preset": "0.53.1", "react-test-renderer": "16.8.3" }, "jest": { "preset": "react-native" } } graddle-wrapper.properties distributionUrl=https\://services.gradle.org/distributions/gradle-4.4-all.zip Build Graddle dependencies { classpath 'com.android.tools.build:gradle:3.0.1' } 。