textBox1.Text = lc_yhbm;

            }

        }

单击按钮事件中有关用户修改并存入XML文件代码：

        private void button7_Click(object sender, EventArgs e)

        {

            XElement yhFile = XElement.Load(@"ftp://100.100.0.1/yhcd1/XMLYhsj.xml");

            string lc_yhbm = textBox1.Text.Trim();

            string lc_yhxm = textBox2.Text.Trim();

            string lc_dwmc = textBox3.Text.Trim();

            string lc_jsmc = textBox4.Text.Trim();

            string lc_yhmm1 = textBox5.Text.Trim();

            string lc_yhmm2 = textBox10.Text.Trim();

            string lc_scmm = oper.mmjmsc(lc_yhmm1);              //调用密码加密输出方法

            try

            {

                foreach (var cl in yhFile.Elements("yhbm"))

                {

                    if (cl.Value.ToString() == lc_yhbm)

                    {

                        cl.SetAttributeValue("yhxm", lc_yhxm);  //修改元素属性

                        cl.SetAttributeValue("dwbm", lc_dwbm);  //lc_dwbm下拉列表框赋值

                        cl.SetAttributeValue("dwmc", lc_dwmc);

                        cl.SetAttributeValue("jsbm", lc_jsbm);  //lc_jsbm下拉列表框赋值

                        cl.SetAttributeValue("jsmc", lc_jsmc);

                        cl.SetAttributeValue("yhmm", lc_scmm);

                    }

                }