CaptchaRecogition.gp_down.btn_Get_Click C# (CSharp) Method

        private void btn_Get_Click(object sender, EventArgs e)
        {
            if (rb_Local.Checked)
            {
                GetVCodeFromFile();
            }
            else
            {
                if (!string.IsNullOrEmpty (txt_Url.Text .Trim ()))
                {
                    GetVCodeFromUrl(txt_Url.Text .Trim ());
                }
                else
                {
                    MessageBox.Show("网络地址不能空！！");
                }
             
            }
        }