Question

        string formUrl = "url";
        string formParams = string.Format("params");
        string cookieHeader;
        WebRequest req = WebRequest.Create(formUrl);
        req.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
        req.Method = "POST";
        byte[] bytes = Encoding.ASCII.GetBytes(formParams);
        req.ContentLength = bytes.Length;
        using (Stream os = req.GetRequestStream())
        {
            os.Write(bytes, 0, bytes.Length);
        }
        WebResponse resp = req.GetResponse();
        cookieHeader = resp.Headers["Set-cookie"];

        string pageSource;
        string getUrl = "link to csv file";
        WebRequest getRequest = WebRequest.Create(getUrl);
        getRequest.Headers.Add("Cookie", cookieHeader);
        WebResponse getResponse = getRequest.GetResponse();
        using (StreamReader sr = new StreamReader(getResponse.GetResponseStream()))
        {
            pageSource = sr.ReadToEnd();
        }

嘿伙计们，我目前正在使用此代码，我从这个网站上下载，我已经下载了fiddler并且能够登录并导航到我想要下载我的.csv文件的页面。

StreamReader会带回.csv文件中的内容，但我想将其下载到计算机上的路径中。

getUrl是一个直接链接到我在浏览器中单击下载文件的链接。

网址示例： http://myurl.com/index.php?controller=AdminRequestSql&token=123&id_request_sql=7&exportrequest_sql=1

很抱歉，如果措辞不正确，我对C＃很陌生并试图学习新东西。

由于

Answer 1

对于.NET Framework 4及更高版本：

    string formUrl = "url";
    string formParams = string.Format("params");
    string cookieHeader;
    WebRequest req = WebRequest.Create(formUrl);
    req.ContentType = "application/x-www-form-urlencoded; charset=UTF-8";
    req.Method = "POST";
    byte[] bytes = Encoding.ASCII.GetBytes(formParams);
    req.ContentLength = bytes.Length;
    using (Stream os = req.GetRequestStream())
    {
        os.Write(bytes, 0, bytes.Length);
    }
    WebResponse resp = req.GetResponse();
    cookieHeader = resp.Headers["Set-cookie"];

    string pageSource;
    string getUrl = "link to csv file";
    WebRequest getRequest = WebRequest.Create(getUrl);
    getRequest.Headers.Add("Cookie", cookieHeader);
    WebResponse getResponse = getRequest.GetResponse();
    using (StreamReader sr = new 
    using (Stream output = File.OpenWrite("filename.csv"))
    using (Stream input = getResponse.Response.GetResponseStream())
    {
         input.CopyTo(output);
    }

对于低于4的.NET框架

    using (Stream output = File.OpenWrite("filename.csv"))
    using (Stream input = getResponse.Response.GetResponseStream())
    {
         byte[] buffer = new byte[8192];
         int bytesLength;
         while ((bytesLength = input.Read(buffer, 0, buffer.Length)) > 0)
         {
              output.Write(buffer, 0, bytesLength);
         }
    }

两者之间的区别在于您需要手动下载较低框架的文件。此外，建议使用WebClient类。您可以找到有关如何使用该类的大量资源。目前，您可以开始使用here。

从网站下载CSV文件

1 个答案: