利用代碼實現下載文件

C# 可以直接調用此代碼，直接下載文件，等下載功能

直接上代碼：（根據需要添加請求頭、UA 和 Cookie 等）

/// <summary>
/// 下載文件
/// </summary>
/// <param name="Url">請求地址</param>
/// <param name="FileName">下載後的存放地址</param>
public static bool DownloadFile(string Url, string FileName)
{
    float percent = 0;
    try
    {
        HttpWebRequest Myrq = (HttpWebRequest)HttpWebRequest.Create(Url);
        Myrq.Referer = Url;
        HttpWebResponse myrp = (HttpWebResponse)Myrq.GetResponse();
        long totalBytes = myrp.ContentLength;
        System.IO.Stream st = myrp.GetResponseStream();
        System.IO.Stream so = new System.IO.FileStream(FileName, System.IO.FileMode.Create);
        long totalDownloadedByte = 0;
        byte[] by = new byte[1024];
        int osize = st.Read(by, 0, (int)by.Length);
        while (osize > 0)
        {
            totalDownloadedByte = osize + totalDownloadedByte;
            so.Write(by, 0, osize);
            osize = st.Read(by, 0, (int)by.Length);
            percent = (float)totalDownloadedByte / (float)totalBytes * 100;
            Console.Write(percent.ToString("00") + " ");
        }
        so.Close();
        st.Close();
        Console.WriteLine("完成");
        return true;
    }
    catch (Exception e)
    {
        Console.WriteLine("失敗，原因：" + e.Message);
        return false;
    }
}

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