请教关于动态添加删除组合框并合并文档功能的实现问题

[yyada]

我想实现一个根据需要动态添加删除ComboBox控件，并将生成的ComboBox控件中选中的内容全部添加到1个richTextBox中，以下是代码部分

       
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.Sql;
using System.Data.SqlClient;

namespace WindowsFormsApplication1
{
    public partial class Form2 : Form
    {
        string str;
        string cbbname;
        private int i = 0;
        ComboBox cbb;
        public Form2()
        {
            InitializeComponent();
        }       
        //button1为动态添加ComboBox键
        private void button1_Click(object sender, EventArgs e)
        {           
            i++;
           
            cbb = new ComboBox();
            cbb.Name = "cbb" + i;
            cbb.Location = new System.Drawing.Point(90, i * 30);
            cbb.Size = new System.Drawing.Size(120, 21);
              
                
            SqlConnection conn = new SqlConnection(Properties.Settings.Default.测试专用ConnectionString);
            conn.Open();
            string str = "select DeptName from Table_1";
            SqlCommand cmd = new SqlCommand(str, conn);
            SqlDataReader reader = cmd.ExecuteReader();
            while (reader.Read())
            {
                cbb.Items.Add(reader["DeptName"]);
            }
            reader.Close();
            conn.Close();  
            this.Controls.Add(cbb);
            //添加一个触发一次button3，不知道对不对？
            cbb.SelectedIndexChanged += new EventHandler(button3_Click);

        }
        //链接“测试专用”数据库
        private void Form2_Load(object sender, EventArgs e)
        {
            try
            {
                SqlConnection conn = new SqlConnection(Properties.Settings.Default.测试专用ConnectionString);
                conn.Open();
                string str = "select DeptName from Table_1";
                SqlCommand cmd = new SqlCommand(str, conn);
                SqlDataReader reader = cmd.ExecuteReader();
                while (reader.Read())
                {
                    this.comboBox1.Items.Add(reader["DeptName"]);
                }
                reader.Close();
                conn.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }
        //将所有comboBox中的选中内容合并到richTextBox中
        private void button3_Click(object sender, EventArgs e)
        {
         
            
            if (i == 0)
            {
                richTextBox1.Text = comboBox1.Text;                
            }
            else
            {
                foreach (Control c in this.Controls)
                {
                    if (c is ComboBox)
                    {
                        ComboBox cbb = (ComboBox)c;
                        cbbname = ("cbb" + i).ToString();
                        if (cbb.Name.ToString() == cbbname.ToString())
                        {
                            i--;
                            //this.Controls.Remove(c);
                            str +=  "," + cbb.Text;
                            richTextBox1.Text = comboBox1.Text + str;
                        }
                    }
                }
 
            }
            
            
        }
        //删除键：实现逐一删除ComboBox控件
        private void button4_Click(object sender, EventArgs e)
        {
            foreach(Control c in this.Controls)
            {
                if (c is ComboBox)
                {
                    ComboBox cbb = (ComboBox)c;
                    cbbname = ("cbb" + i).ToString();
                    if (cbb.Name.ToString() == cbbname.ToString())
                    {
                        i--;
                        this.Controls.Remove(c);
                    }
                }
            }
                      
        }
     

    }
}
       
              
        

问题：
1.若按顺序可以实现加2个ComboBox，选择后内容（eg：第一个A，第二个B,而本来存在的comboBox1的内容为B）后，richtextbox1可以显示B,A,B，但是若我将comboBox1的内容改为C的时候，按button3时richtextbox1无法实现同步更改为C,A,B即无法同步更改，另外这时候按删除键，删除的却是生成的第二个comboBox的内容（第二个comboBox的内容A变为空了），而richtextbox1也没有改变
具体的这个程序是漏洞百出啊，我就是想实现根据需要动态加comboBox，而richtextbox的内容随comboBox的内容、comboBox的增加等操作同时改变，本人是新手请各位大神多多指教！~~求C#代码，谢谢！~~

[aa659401538]

学习 版主删我贴了

[yyada]

新手，请各位大神帮忙。。。。

[u010689260]

删除键就可以每次删掉最后一个,其他的没听懂你说的

ArrayList array = new ArrayList();
在button1中加句:
            [code=csharp]array.Add(cbb.Text);
            cbb.TextChanged += cbb_TextChanged;

然后

void cbb_TextChanged(object sender, EventArgs e)
        {
            foreach (Control text in this.Controls)
            {
                if (text is ComboBox)
                {
                    ComboBox coo = (ComboBox)text;
                    if (coo.Focused)
                    {
                        index = coo.TabIndex;
                        array.RemoveAt((index - 6));
                        array.Insert((index - 6), coo.Text);
                        //MessageBox.Show(aaa.ToString());
                    }
                }
            }         
            //throw new NotImplementedException();
        }

//删除键： private void button4_Click(object sender, EventArgs e) { if (i == 0) MessageBox.Show("已经无法删除了"); cbbname = ("cbb" + i).ToString();//剩下的最后一个创建的combobox控件的名称 //按照控制顺序来删除combobox foreach (Control c in this.Controls) { if (c is ComboBox) { ComboBox cbb = (ComboBox)c; //当前选择的combobox控件 if (cbb.Name.ToString() == cbbname.ToString()) { int ee = i-1; i--; array.RemoveAt(ee); this.Controls.Remove(c); } } } } [/code]

[yyada]

引用 4 楼 u010689260 的回复:

删除键就可以每次删掉最后一个,其他的没听懂你说的

ArrayList array = new ArrayList();
在button1中加句:
            [code=csharp]array.Add(cbb.Text);
            cbb.TextChanged += cbb_TextChanged;

然后

void cbb_TextChanged(object sender, EventArgs e)
        {
            foreach (Control text in this.Controls)
            {
                if (text is ComboBox)
                {
                    ComboBox coo = (ComboBox)text;
                    if (coo.Focused)
                    {
                        index = coo.TabIndex;
                        array.RemoveAt((index - 6));
                        array.Insert((index - 6), coo.Text);
                        //MessageBox.Show(aaa.ToString());
                    }
                }
            }         
            //throw new NotImplementedException();
        }

//删除键： private void button4_Click(object sender, EventArgs e) { if (i == 0) MessageBox.Show("已经无法删除了"); cbbname = ("cbb" + i).ToString();//剩下的最后一个创建的combobox控件的名称 //按照控制顺序来删除combobox foreach (Control c in this.Controls) { if (c is ComboBox) { ComboBox cbb = (ComboBox)c; //当前选择的combobox控件 if (cbb.Name.ToString() == cbbname.ToString()) { int ee = i-1; i--; array.RemoveAt(ee); this.Controls.Remove(c); } } } } [/code]

谢谢!