按钮事件

[zhuxiao17]

if (this.Button1.BackColor == Color.Lime)
{
this.Button1.BackColor = Color.Red;
return;
}
if (this.Button1.BackColor == Color.Red)
{
this.Button1.BackColor = Color.Yellow;
return;
}
if (this.Button1.BackColor == Color.Yellow)
{
this.Button1.BackColor = SystemColors.Control;
return;
}
如何可以一直点按钮一直循环~比如点一下红色，再点一下黄色，再点默认色，一直循环下去

[kkun_3yue3]

帮顶,一会儿给贴代码

[月影]

Color[] colors = new Color[] { Color.Red, Color.Yellow, ....} // colors that you want to set in the loop.

int currentIndex = colors.IndexOf(Button1.BackColor);
currentIndex = (currentIndex + 1 == colors.Length || currentIndex < 0) ? 0 : currentIndex + 1;
Button1.BackColor = colors[currentIndex];

I didnot test the above code. but that's question is easy. you are weak. need to study hard.

[cja03]

按照你的写法，把头尾接起来就行了：
if (this.Button1.BackColor == SystemColors.Control)
this.Button1.BackColor = Color.Red;
else if (this.Button1.BackColor == Color.Red)
this.Button1.BackColor = Color.Yellow;
else
this.Button1.BackColor = SystemColors.Control;

[TkingCN]

你想复杂了 我也遇见过一样的问题 不过其实代码很简单
if (this.Button1.BackColor == Color.Lime)
{
this.Button1.BackColor = Color.Red;

}else
{
this.Button1.BackColor == Color.Lime
}

[kkun_3yue3]

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

namespace WebApplication1 {
    public partial class _Default : System.Web.UI.Page {
        private Queue<Color> list = new Queue<Color>();
        protected void Page_Load( object sender, EventArgs e ) {
            if( !IsPostBack ) {
                if(list.Count <= 0 ) {
                    list.Enqueue( Color.Yellow );
                    list.Enqueue( Color.Blue );
                    list.Enqueue( Color.Red );
                    ViewState[ "color" ] = list;
                }
            }

        }

        protected void Button1_Click( object sender, EventArgs e ) {
            Queue<Color> list = LoopColor;
            Button1.BackColor = list.Peek();
            Response.Write( Button1.BackColor.ToString() );
            list.Enqueue( list.Dequeue() );
        }


        public Queue<Color> LoopColor {
            get {
                return ViewState[ "color" ] as Queue<Color>;
            }
            set {
                ViewState[ "color" ] = value;
            }
        }
    }
}

[LemIST]

[Quote=引用 2 楼 gentle_wolf 的回复:]
Color[] colors = new Color[] { Color.Red, Color.Yellow, ....} // colors that you want to set in the loop.

int currentIndex = colors.IndexOf(Button1.BackColor);
currentIndex = (currentIndex + 1 == colors.Length || currentIndex < 0) ? 0 : currentIndex + 1;
Button1.BackColor = colors[currentIndex];

I didnot test the above code. but that's question is easy. you are weak. need to study ha…
[/Quote]

int currentIndex = colors.IndexOf(Button1.BackColor);
currentIndex = (currentIndex + 1) / colors.Length;
Button1.BackColor = colors[currentIndex];

[LemIST]

[Quote=引用 6 楼 LemIST 的回复:]
引用 2 楼 gentle_wolf 的回复:
Color[] colors = new Color[] { Color.Red, Color.Yellow, ....} // colors that you want to set in the loop.

int currentIndex = colors.IndexOf(Button1.BackColor);
currentIndex = (currentIndex + 1 == colors.Length || currentIndex < 0) ? 0 : currentIndex + 1;
Button1.BackColor = colors[currentIndex];

I didnot test the above code. but that's question is easy.…
[/Quote]
不好意思写错了
int currentIndex = colors.IndexOf(Button1.BackColor);
currentIndex = (currentIndex + 1) % colors.Length;
Button1.BackColor = colors[currentIndex];

[kkun_3yue3]

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

namespace WebApplication1 {
    public partial class _Default : System.Web.UI.Page {
        private Queue<Color> list = new Queue<Color>();
        protected void Page_Load( object sender, EventArgs e ) {
            if( !IsPostBack ) {
                if(list.Count <= 0 ) {
                    list.Enqueue( Color.Yellow );
                    list.Enqueue( Color.Blue );
                    list.Enqueue( Color.Red );
                    list.Enqueue( Color.Aqua );
                    list.Enqueue( Color.Brown );
                    list.Enqueue( Color.DarkGoldenrod );
                    list.Enqueue( Color.Ivory );
                    //有多少都按照上述格式添加即可,
                    ViewState[ "color" ] = list;
                }
            }

        }

        protected void Button1_Click( object sender, EventArgs e ) {
            Queue<Color> list = LoopColor;
            Button1.BackColor = list.Peek();
            Response.Write( Button1.BackColor.ToString() );
            list.Enqueue( list.Dequeue() );
        }


        public Queue<Color> LoopColor {
            get {
                return ViewState[ "color" ] as Queue<Color>;
            }
            set {
                ViewState[ "color" ] = value;
            }
        }
    }
}

不知道为何不使用JS的方式,这种页面上的逻辑交给客户端操作似乎更合理些!完全没必要上服务器上转个圈

[zhuxiao17]

如果我想把颜色存入数据库里用什么方法比较好呢？

[zhuxiao17]

JS不行啊~昨天你给的都不行

[namhyuk]

[zhuxiao17]

JS还原默认色怎么写？

[hqq0326]

回帖是一种美德！

[sunny906]

if (this.button6.BackColor == SystemColors.Control)
{
this.button6.BackColor = Color.Red;
return;
}
if (this.button6.BackColor == Color.Red)
{
this.button6.BackColor = Color.Yellow;
return;
}
if (this.button6.BackColor == Color.Yellow)
{
this.button6.BackColor =SystemColors.Control ;
return;
}

[kkun_3yue3]

[Quote=引用 10 楼 zhuxiao17 的回复:]
JS不行啊~昨天你给的都不行
[/Quote]

刚才的C#的也不行吗?
所有代码我都是调试通过后才回的贴
或许你应该把要求再说详细些

[zhuxiao17]

C#可以的~JS脚本不行~按钮点上去没反应~我也想无刷新就变色~不用服务端代码