Question

C# Button点击变颜色

在窗体上加一个按钮Button1，当启动调试时显示的是蓝色的“在线”，再点一下显示的是红色的“离线”，如此反复。请问代码该怎么写？

Answer 1

if(this.button1.Text=="离线")

{

this.button1.Text="在线";

this.button1.ForeColor = Color.Blue;

}

else

{

this.button1.Text="离线";
this.button1.ForeColor = Color.Red;

}

Answer 2

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

namespace WindowsApplication1
{
public partial class Form1 : Form
{
Boolean isTrue = true;
public Form1()
{
InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
if(isTrue)
{
this.button1.Text = "在线";
this.button1.ForeColor = Color.Blue;
}
else
{
this.button1.Text = "离线";
this.button1.ForeColor = Color.Red;
}
isTrue = !isTrue;
}
}
}