Winform请求接口地址

代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Windows.Forms;

namespace WinForm_GetUrl
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string url = @"http://192.168.0.178:8039/VR720Service/GetCreateVR.php?Id=01&Url=D:\TianHaiMingWang\ZipFileNav&Name=s2.zip&Tooken=2e2b5c70-06b3-4a17-a2e3-b7c2de828b86";
            string urlDB =   Of_GetStr(url);
        }
        public string Of_GetStr(string url)
        {
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            string ret = string.Empty;
            Stream s;
            string StrDate = "";
            string strValue = "";
            if (response.StatusCode == HttpStatusCode.OK)
            {
                s = response.GetResponseStream();
                StreamReader Reader = new StreamReader(s, Encoding.UTF8);
                while ((StrDate = Reader.ReadLine()) != null)
                {
                    strValue += StrDate;
                }
            }
            return strValue;
        }
    }
}