求教，为啥使用如下代码插入ACCESS数据库的时候一下插入n多

Question

如题，代码如下，运行的时候插入数据未响应，半天后发现插入了数十次，求大侠帮忙看看问题出在哪里....小弟感激不尽...
string ConStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data source=" + Application.StartupPath + @"\db1.mdb";
                OleDbConnection conn = new OleDbConnection();
                String str = "./db1.mdb";
                OleDbConnection OleDbcon = new OleDbConnection("Provider=Microsoft.jet.OLEDB.4.0;Data Source=" + str + ";User ID=admin;Password=;Jet OLEDB:Database Password=");
                try
                {
                    OleDbcon.Open();
                    OleDbCommand cmd = new OleDbCommand("insert into "+comboBox1.Text.ToString()+" (商品名称,单位,售价,进价) values(@textBox2,@textBox3,@textBox4,@textBox5)", OleDbcon);
                    cmd.Parameters.AddWithValue("@textBox2", textBox2.Text.Trim());
                    cmd.Parameters.AddWithValue("@textBox3", textBox3.Text.Trim());
                    cmd.Parameters.AddWithValue("@textBox4", textBox4.Text.Trim());
                    cmd.Parameters.AddWithValue("@textBox5", textBox5.Text.Trim());
                    int result = cmd.ExecuteNonQuery();
                    if (result > 0)
                    {
                        button6_Click(null, null);
                        textBox2.Text = string.Empty;
                        textBox3.Text = string.Empty;
                        textBox4.Text = string.Empty;
                        textBox5.Text = string.Empty;
                    }
                    else
                        MessageBox.Show("添加失败！");
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
                finally
                {
                    OleDbcon.Close();
                }

Answer 1

就是一个按钮的点击事件，检测所填的textbox是否为空，为空则提示，不为空则执行添加，代码如下：
private void button6_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(textBox2.Text.Trim()))
            {
                MessageBox.Show("你妹的，都填上！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                textBox2.Focus();
            }
            else if (string.IsNullOrEmpty(textBox3.Text.Trim()))
            {
                MessageBox.Show("你妹的，都填上！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                textBox3.Focus();
            }
            else if (string.IsNullOrEmpty(textBox4.Text.Trim()))
            {
                MessageBox.Show("你妹的，都填上！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                textBox4.Focus();
            }
            else if (string.IsNullOrEmpty(textBox5.Text.Trim()))
            {
                MessageBox.Show("你妹的，都填上！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                textBox5.Focus();
            }
            else
            {
                string ConStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data source=" + Application.StartupPath + @"\db1.mdb";
                OleDbConnection conn = new OleDbConnection();
                String str = "./db1.mdb";
                OleDbConnection OleDbcon = new OleDbConnection("Provider=Microsoft.jet.OLEDB.4.0;Data Source=" + str + ";User ID=admin;Password=;Jet OLEDB:Database Password=");
                try
                {
                    OleDbcon.Open();
                    OleDbCommand cmd = new OleDbCommand("insert into "+comboBox1.Text.ToString()+" (商品名称,单位,售价,进价) values(@textBox2,@textBox3,@textBox4,@textBox5)", OleDbcon);
                    cmd.Parameters.AddWithValue("@textBox2", textBox2.Text.Trim());
                    cmd.Parameters.AddWithValue("@textBox3", textBox3.Text.Trim());
                    cmd.Parameters.AddWithValue("@textBox4", textBox4.Text.Trim());
                    cmd.Parameters.AddWithValue("@textBox5", textBox5.Text.Trim());
                    int result = cmd.ExecuteNonQuery();
                    if (result > 0)
                    {
                        button6_Click(null, null);
                        textBox2.Text = string.Empty;
                        textBox3.Text = string.Empty;
                        textBox4.Text = string.Empty;
                        textBox5.Text = string.Empty;
                    }
                    else
                        MessageBox.Show("添加失败！");
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
                finally
                {
                    OleDbcon.Close();
                }
            }

Answer 2

button6_Click(null, null);删除了

Answer 3

那句在这里红色部分
 if (result > 0)
  {
  button6_Click(null, null);
  textBox2.Text = string.Empty;
  textBox3.Text = string.Empty;
  textBox4.Text = string.Empty;
  textBox5.Text = string.Empty;
  }

Answer 4

谢谢~
button6_Click(null, null);
确实删除这句就好了，请教下，为啥有这句会重复添加呢？

Answer 5

因为你所有代码都放在button6_Click事件里啊，相当于递归啊