常用 TCP Port作用及其操作建議
在上網的時候,我們經常會看到「Port」這個詞,也會經常用到Port號,比如在FTP位址後面增加的「21」,21就表示Port號。那麼Port到底是什麼意思呢?怎樣查看Port號呢?一個Port是否成為網路惡意攻擊的大門呢?,我們應該如何面對形形色色的Port呢?下面就將介紹這方面的內容,以供大家參考。
Port簡介:本文介紹Port的概念,分類,以及如何關閉/開啟一個Port
21Port:21Port主要用於FTP(File Transfer Protocol,檔傳輸協定)服務。
- Jun 03 Wed 2009 00:07
常用 TCP Port作用及其操作建議
- Jun 01 Mon 2009 00:31
[VB NET]Label 畫邊框
Private Sub Label1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Label1.Paint
'上
e.Graphics.DrawLine(New Pen(System.Drawing.Brushes.Black, 1), New Point(0, 0), New Point(Label1.Width - 1, 0))
'左
e.Graphics.DrawLine(New Pen(System.Drawing.Brushes.Black, 1), New Point(0, 0), New Point(0, Label1.Height - 1))
- May 27 Wed 2009 00:13
[C#]上傳圖片到資料庫
一.上傳圖片到資料庫
///<summary>
/// 上傳圖片
/// </summary>
private void UploadFile()
- May 26 Tue 2009 00:11
[.net]byte array和string轉換
' VB.Net 把byte array轉成String
Dim b As Byte() = {65, 66, 67, 68, 69, 70, 71}
Dim str As String
Dim enc As New System.Text.ASCIIEncoding()
Response.Write(enc.GetString(b))
- May 25 Mon 2009 00:55
身份證驗證規則
第一位為英文字母
第二個數字是男女生之分,男生為 1,女生為 2
身份證字號後面八個數字之中,前面七個可以隨便打
最後一位為檢查碼,必須經過之前一個字母與8個數字的組合計算後得出
- May 21 Thu 2009 00:22
[VB.Net] 關於 PictureBox 圖片 的旋轉 / 翻轉
' Form Load 事件, PictureBox 讀入圖片
Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
PictureBox1.SizeMode = PictureBoxSizeMode.AutoSize ' 設定PictureBox 自動調整大小
PictureBox1.Load("C:\Picture\Genius.jpg") ' PictureBox 載入影像
- May 19 Tue 2009 00:59
[asp net]如何找到GridView中的Check box值
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim i As Integer = 0
For i = 0 To GridView1.Rows.Count - 1
If CType(GridView1.Rows(i).Cells(0).FindControl("CheckBox1"), CheckBox).Checked = True Then
Response.Write(GridView1.Rows(i).DataItemIndex)
- May 18 Mon 2009 01:19
[c#]GridView 分頁結果只有一頁,照樣顯示分頁區
protected void GridView1_PreRender(object sender, EventArgs e)
{
GridView gv = (GridView)sender;
GridViewRow gvr = (GridViewRow)gv.BottomPagerRow;
if (gvr != null)
- May 15 Fri 2009 01:13
HTML色碼表
#FFFFFF | #DDDDDD | #AAAAAA | #888888 | #666666 | #444444 | #000000 |
#FFB7DD | #FF88C2 | #FF44AA | #FF0088 | #C10066 | #A20055 | #8C0044 |
#FFCCCC | #FF8888 | #FF3333 | #FF0000 | #CC0000 | #AA0000 | #880000 |
#FFC8B4 | #FFA488 | #FF7744 | #FF5511 | #E63F00 | #C63300 | #A42D00 |
#FFDDAA | #FFBB66 | #FFAA33 | #FF8800 | #EE7700 | #CC6600 | #BB5500 |
#FFEE99 | #FFDD55 | #FFCC22 | #FFBB00 | #DDAA00 | #AA7700 | #886600 |
#FFFFBB | #FFFF77 | #FFFF33 | #FFFF00 | #EEEE00 | #BBBB00 | #888800 |
#EEFFBB | #DDFF77 | #CCFF33 | #BBFF00 | #99DD00 | #88AA00 | #668800 |
#CCFF99 | #BBFF66 | #99FF33 | #77FF00 | #66DD00 | #55AA00 | #227700 |
#99FF99 | #66FF66 | #33FF33 | #00FF00 | #00DD00 | #00AA00 | #008800 |
#BBFFEE | #77FFCC | #33FFAA | #00FF99 | #00DD77 | #00AA55 | #008844 |
#AAFFEE | #77FFEE | #33FFDD | #00FFCC | #00DDAA | #00AA88 | #008866 |
#99FFFF | #66FFFF | #33FFFF | #00FFFF | #00DDDD | #00AAAA | #008888 |
#CCEEFF | #77DDFF | #33CCFF | #00BBFF | #009FCC | #0088A8 | #007799 |
#CCDDFF | #99BBFF | #5599FF | #0066FF | #0044BB | #003C9D | #003377 |
#CCCCFF | #9999FF | #5555FF | #0000FF | #0000CC | #0000AA | #000088 |
#CCBBFF | #9F88FF | #7744FF | #5500FF | #4400CC | #2200AA | #220088 |
#D1BBFF | #B088FF | #9955FF | #7700FF | #5500DD | #4400B3 | #3A0088 |
#E8CCFF | #D28EFF | #B94FFF | #9900FF | #7700BB | #66009D | #550088 |
#F0BBFF | #E38EFF | #E93EFF | #CC00FF | #A500CC | #7A0099 | #660077 |
#FFB3FF | #FF77FF | #FF3EFF | #FF00FF | #CC00CC | #990099 | #770077 |
資料來源:http://blog.xuite.net/jyoutw/xtech/23216523
- May 14 Thu 2009 00:30
[c#] TextBox 限制只能輸入數字
--------------頁面加入js-------------
<script language="javascript" id="clientEventHandlersJS">
function f(){
if(!(window.event.keyCode>=48 && window.event.keyCode<=57)){
window.event.keyCode=0