在窗體上放置一個 Timer 控件,Interval 屬性設(shè)置為 120000(120000毫秒=120秒=2分鐘),Enabled 屬性設(shè)置為 True,添加如下代碼:

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Private?Sub?Timer1_Tick(ByVal?sender?As?System.Object,?ByVal?e?As?System.EventArgs)?Handles?Timer1.Tick
Dim?dDir1?As?New?System.IO.DirectoryInfo("C:\a")
dDir1.MoveTo("D:\b")??'移動?C:\a?文件夾所有文件到?D:\b????
End?Sub
Dim OpenFileDialog As New OpenFileDialog
OpenFileDialog.InitialDirectory = My.Computer.FileSystem.SpecialDirectories.MyDocuments
OpenFileDialog.Filter = "文本文件(*.jpg)|*.jpg|所有文件(*.*)|*.*"
If (OpenFileDialog.ShowDialog(Me) = System.Windows.Forms.DialogResult.OK) Then
Dim FileName As String = OpenFileDialog.FileName
' TODO: 在此處添加打開文件的代碼。
textbox1.Text = FileName
End If
第一個按鈕 上傳
Dim filelast As String = fileaddbefore.Text.Substring(fileaddbefore.Text.LastIndexOf("."), fileaddbefore.Text.Length - fileaddbefore.Text.LastIndexOf("."))
MessageBox.Show(filelast)
My.Computer.Network.UploadFile(textbox1.Text, "" 文件名.Text filelast, "登錄名1", "登錄密碼", True, 100)
第二個按鈕
下載,直接通過url讀取文件,然后Response.OutputStream.Write()數(shù)據(jù)
下面提供個下載的靜態(tài)方法,是C#的,供參考:
///?summary
///?下載文件
///?/summary
///?param?name="fileName"下載的文件名稱(包括擴(kuò)展名)/param
///?param?name="filePath"下載文件的絕對路徑/param
public?static?void?DownFile(string?fileName,?string?filePath)
{
//打開要下載的文件,并把該文件存放在FileStream中????????????????
System.IO.FileStream?Reader?=?System.IO.File.OpenRead(filePath);
//文件傳送的剩余字節(jié)數(shù):初始值為文件的總大小????????????????
long?Length?=?Reader.Length;
HttpContext.Current.Response.Buffer?=?false;
HttpContext.Current.Response.AddHeader("Connection",?"Keep-Alive");
HttpContext.Current.Response.ContentType?=?"application/octet-stream";
HttpContext.Current.Response.Charset?=?"utf-8";
HttpContext.Current.Response.AddHeader("Content-Disposition",?"attachment;?filename="?+?System.Web.HttpUtility.UrlEncode(fileName));
HttpContext.Current.Response.AddHeader("Content-Length",?Length.ToString());
byte[]?Buffer?=?new?Byte[10000];//存放欲發(fā)送數(shù)據(jù)的緩沖區(qū)????????????????
int?ByteToRead;?//每次實(shí)際讀取的字節(jié)數(shù)???????????????
while?(Length??0)
{????
//剩余字節(jié)數(shù)不為零,繼續(xù)傳送????????????????????
if?(HttpContext.Current.Response.IsClientConnected)
{????
//客戶端瀏覽器還打開著,繼續(xù)傳送????????????????????????
ByteToRead?=?Reader.Read(Buffer,?0,?10000);???????????????????//往緩沖區(qū)讀入數(shù)據(jù)????????????????????????
HttpContext.Current.Response.OutputStream.Write(Buffer,?0,?ByteToRead);????
//把緩沖區(qū)的數(shù)據(jù)寫入客戶端瀏覽器????????????????????????
HttpContext.Current.Response.Flush();?//立即寫入客戶端????????????????????????
Length?-=?ByteToRead;//剩余字節(jié)數(shù)減少????????????????????????????}
else
{?????????????????????????
//客戶端瀏覽器已經(jīng)斷開,阻止繼續(xù)循環(huán)????????????????????????
Length?=?-1;
}
}????????????????//關(guān)閉該文件???????????????
Reader.Close();
}
Imports System
Imports System.IO.Ports
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'獲取計(jì)算機(jī)有效串口
Dim ports As String() = SerialPort.GetPortNames() '必須用命名空間,用SerialPort,獲取計(jì)算機(jī)的有效串口
Dim port As String
For Each port In ports
portnamebox.Items.Add(port) '向combobox中添加項(xiàng)
Next port
'初始化界面
文章名稱:vb.net傳送文件,vbnet讀取文件內(nèi)容
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