using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using MetroFramework.Forms; namespace KMS_Starter { public partial class Form2 : MetroForm { public Form2() { InitializeComponent(); } private void Form2_Load(object sender, EventArgs e) { } private void metroButton1_Click(object sender, EventArgs e) { DownloadFile("http://localhost:1928/WebServer/downloader/123.rar", @"C:123.rar", metroProgressBar1, label2); } /// <summary> /// c#,.net 下載文件 /// </summary> /// <param name="URL">下載文件地址</param> /// /// <param name="Filename">下載後的存放地址</param> /// <param name="Prog">用於顯示的進度條</param> /// public void DownloadFile(string URL, string filename, System.Windows.Forms.ProgressBar prog, System.Windows.Forms.Label label1) { float percent = 0; 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); percent = (float)totalDownloadedByte / (float)totalBytes * 100; label2.Text = "當前補丁下載進度" + percent.ToString() + "%"; System.Windows.Forms.Application.DoEvents(); //必須加註這句代碼,否則label1將因爲循環執行太快而來不及顯示信息 } so.Close(); st.Close(); } catch (System.Exception) { throw; } } } }