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  • Winform下载文件

     /// <summary>
            
    /// 下载文件
            
    /// </summary>
            
    /// <param name="URL">下载文件地址</param>
            
    /// <param name="Filename">下载后的存放地址</param>
            
    /// <param name="Prog">用于显示的进度条</param>
            public void DownloadFile(string URL, string filename, System.Windows.Forms.ProgressBar prog)
            {
                
    try
                {
                    System.Net.HttpWebRequest Myrq 
    = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(URL);
                    System.Net.HttpWebResponse myrp 
    = (System.Net.HttpWebResponse)Myrq.GetResponse();
                    
    long totalBytes = myrp.ContentLength;

                    
    if (prog != null)
                    {
                        prog.Maximum 
    = (int)totalBytes;
                    }

                    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;
                        System.Windows.Forms.Application.DoEvents();
                        so.Write(by, 
    0, osize);

                        
    if (prog != null)
                        {
                            prog.Value 
    = (int)totalDownloadedByte;
                        }
                        osize 
    = st.Read(by, 0, (int)by.Length);
                    }
                    so.Close();
                    st.Close();
                }
                
    catch (System.Exception)
                {
                    
    throw;
                }
            }

            
    /// <summary>
            
    /// 下载文件
            
    /// </summary>
            
    /// <param name="URL">下载文件地址</param>
            
    /// <param name="Filename">下载后的存放地址</param>
            public void DownloadFile(string URL, string filename)
            {
                DownloadFile(URL, filename, 
    null);
            }
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  • 原文地址:https://www.cnblogs.com/liufei88866/p/1766622.html
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