简单的功能,但难以实现!在线等待.......

[sephirothy]

1个button控件20个textbox控件.点击BUTTON此时textbox1背景色变为红色,再次点击textbox1变无色而textbox2变为了红色.依次类推.

[heyu1000]

这个不难实现啊，将20个TEXTBOX放到一个集合里面（可以考虑用泛型），每点击一下记录当前是第几个就行了，然后往下面加。

[human_2]

设置一个全局变量
int i=0;
button _click
text1.backcolor=.....
textbox1_click
this.Controls["textbox"+i.tostring()].backcolor=....
i++;
this.Controls["textbox"+i.tostring()].backcolor=....

然后设置所有textbox的 click 事件
为textbox1_click

[sephirothy]

在下着实有些愚昧,不知阁下表达的意思,可否代码表达.

[lawbc]

定义textBox的id为t1到t20，再定义个全局变量n=1；
点击按钮事件：c/s，b/s差不多

this.Controls.FindControl("t"+n).BackColor=Color.Red;
n++;
if(n>=20)
n=1;

[ProjectDD]

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

namespace WindowsFormsApplication1
{
    public partial class Form1: Form
    {
        public Form1()
        {
            InitializeComponent();
            InitializeUserCom();
        }
        /// <summary>
        /// describe:tbs
        /// </summary>
        public TextBox[] Ptbs
        {
            get;
            set;
        }
        private void InitializeUserCom()
        {
            this.Ptbs = new TextBox[] { 
                this.textBox1,
                this.textBox2,
                this.textBox3,
                this.textBox4,

                this.textBox5,
                this.textBox6,
                this.textBox7,
                this.textBox8,
            };
            this.Pindex = 0;
        }

        /// <summary>
        /// index:index
        /// </summary>
        public int Pindex
        {
            get;
            set;
        }
        private void button1_Click(object sender, EventArgs e)
        {
            if (this.Pindex<9)
            {
                this.Pindex++;
            }
            else
            {
                this.Pindex = 0;
            }
            this.SetTb(this.Pindex);
        }

        private void SetTb(int p)
        {
            for (int i = 0; i < this.Ptbs.Length; i++)
            {
                if (p==i)
                {
                    this.Ptbs[i].BackColor = Color.White;
                }
                else
                {
                    this.Ptbs[i].BackColor = Color.Gray;
                }
            }
        }    }
}

[chqj_163]

this.Controls.FindControl("t"+n++).BackColor=Color.Empty;
if(n>=20)
n=1;
this.Controls.FindControl("t"+n).BackColor=Color.Red;

[simple870617]

        <asp:TextBox ID="TextBox1" runat="server" BackColor="White"></asp:TextBox>
        <asp:TextBox ID="TextBox2" runat="server" BackColor="White"></asp:TextBox>
        <asp:TextBox ID="TextBox3" runat="server" BackColor="White"></asp:TextBox>
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />    
        <asp:Label ID="Label1" runat="server" Text="0" Visible="false"></asp:Label>

        TextBox[] tx = new TextBox[3];
        tx[0] = TextBox1;
        tx[1] = TextBox2;
        tx[2] = TextBox3;
        int i = int.Parse(Label1.Text);
        for (int j = 0; j < tx.Length; j++)
        {
            if (j == i)
            {
                tx[j].BackColor = Color.Red;
            }
            else
            {
                tx[j].BackColor = Color.White;
            }
        }
        i++;
        if (i == tx.Length)
        {
            i = 0;
        }
        Label1.Text = i.ToString();

[simple870617]

我这样写就能实现了。

[simple870617]

我只用3个textbox
你加成20个就是了。。。。