private void Bind(string txt)
        {
            string sql = string.Format("select*from Good");
            if (this.comboBox1.Text != string.Empty)
            {
                sql += string.Format(" where [Good-name]='{0}'",txt);
                sql += string.Format(" where [Good-age]='{0}'", txt);
                sql += string.Format(" where [Good-gender]='{0}'", txt);
                sql += string.Format(" where [Good-qq]='{0}'", txt);
                sql += string.Format(" where [Good- phone]='{0}'", txt);
                sql += string.Format(" where [Good-wechat]='{0}'", txt);
                sql += string.Format(" where [Good-date]='{0}'", txt);
            }
            DataTable dt = DBHelper.getTable(sql);
            this.dataGridView1.DataSource = dt;
            this.comboBox1.SelectedIndex = 0;
        }
        private void 设置好友基本信息ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Form1 f1 = new Form1();
            f1.Show();
            this.Hide();
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            Bind(string.Empty);
        }

        private void 查询_Click(object sender, EventArgs e)
        {
            string cob = this.comboBox1.Text.Trim();
            if (cob != string.Empty)
            {
                Bind(cob);
            }
        }