以下代码中有错误 [英] Having Errors in the following code

问题描述

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Fun_with_If_else
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if(checkBox1.checked==true)

            {
                if(button1=checked)
                {


                    MessageBox.Show("this is not checked");
                }
                else
                {
                    label1.BackColor=Color.Green;
                }
            }
        }
    }

推荐答案

if(button1=checked)将始终引发异常.应该是if(button1.checked).

既然我已经如此迅速地回答了这个问题，我意识到这看起来很像是考试或面试问题.糟糕...

if(button1=checked) will always throw an exception. It should be if(button1.checked).

Now that I have so quickly answered this question, I realize that this looks a lot like an exam or interview question. Oops...

您的拼写错误"在"checkBox1.checked == true"中选中为已选中"是您的错误来源之一.

如果"button1"是WinForms Button控件:WinForms Button不具有已检查"属性，并且它永远不能与任何属性相等"，除非类似:"if(buttton1 == null)".在那种情况下，我们将对象(按钮)与可能的空"或未定义"状态进行比较，这实际上是对象与对象的比较.

您需要获得一本有关C#的好书，并从基础知识入手，包括确保您了解C#区分大小写，并了解对象之间以及对象属性之间的区别.

Your mis-spelling ''Checked as ''checked in "checkBox1.checked==true" is one of your source of errors.

If "button1" is a WinForms Button Control: a WinForms Button has no ''Checked property, and it could never be "equal" to any property, except in a case like: "if (buttton1 == null)." In that case we compare an object (Button) to a possible "empty," or "undefined" state, which really is an object to object comparison.

You need to get a good book on C#, and start with the basics, including making sure you understand that C# is case-sensitive, and learn what the differences between objects, and Properties of objects are.

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