vb.nettc拍的简单介绍

Vb.NET行数据转换成列数据

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

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DataGridView1.Columns.Clear()

DataGridView1.DataSource = GetDateTable("1|2|3,张三|李四|王五,1111111|2222222|3333333", "编号|姓名|卡号")

End Sub

Function GetDateTable(ByVal s As String, ByVal TabNames As String) As DataTable

Dim tb As New DataTable

Dim ss() As String = s.Split(",")

Dim tc() As String = TabNames.Split("|")

Dim c As Integer

For Each i As String In ss

Dim ts() As String = i.Split("|")

Dim dc As DataColumn

If c  tc.Length Then

dc = New DataColumn(tc(c))

Else

dc = New DataColumn

End If

tb.Columns.Add(dc)

For j As Integer = 0 To ts.Length - 1

If j  tb.Rows.Count - 1 Then

tb.Rows.Add(tb.NewRow)

End If

tb.Rows(j)(dc) = ts(j)

Next

c += 1

Next

Return tb

End Function

VB.NET中怎么调用摄像头

给你个工程自己看...

运行后可以看到自己...

点按钮保存到c:\1.bmp

66 73 52 4E 20 4C 4D 33 73 56 23 6E 64 61 74 61 22为16进制的指令怎么用VB.NET 的TCP协议进行数据传输

using Sytem.net.socket;

tcpclient tc = new tcpclient(127.0.0.1,8080);//连接8080端口

netstream ns =tc.getstream();

if(ns.canwrite)

{

byte[] buffer = {0x66, 0x73, 0x52, 0x4E ,0x20 ,0x4C, 0x4D, 0x33, 0x73, 0x56 ,0x23, 0x6E ,0x64 ,0x61, 0x74 ,0x61 ,0x22};

ns.writer(0,buffer,buffer.length);

}

简单的帮你写了下，不会可以通过私信联系我。

VB.NET怎么调用摄像头啊?求实例,最好配注释啊

Private Const WS_CHILD = H40000000

Private Const WS_VISIBLE = H10000000

Private Const WM_CAP_START = H400

Private Const WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10

Private Const WM_CAP_SET_SCALE = WM_CAP_START + 53

Private Const WM_CAP_SET_PREVIEWRATE = WM_CAP_START + 52

Private Const WM_CAP_SET_PREVIEW = WM_CAP_START + 50

Private Declare Function capCreateCaptureWindowA Lib "avicap32.dll" ( _

ByVal lpszWindowName As String, _

ByVal dwStyle As Long, _

ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Integer, _

ByVal hWndParent As Long, ByVal nID As Long) As Long

Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Integer, ByVal lParam As Long) As Long

Private Sub Form_Load()

'建立采集窗口（不显示窗口，处理后显示到PIC控件）

uwndc = capCreateCaptureWindowA("", WS_VISIBLE Or WS_CHILD, 0, 0, 320, 240, Me.hWnd, 0)

'连接

SendMessage uwndc, WM_CAP_DRIVER_CONNECT, 0, 0

'Scale开

SendMessage uwndc, WM_CAP_SET_SCALE, True, 0

'显示刷新MS

SendMessage uwndc, WM_CAP_SET_PREVIEWRATE, 40, 0

'用予览方式显示(特殊需要，不显示予缆）

SendMessage uwndc, WM_CAP_SET_PREVIEW, True, 0

End Sub

上述代码就可以实现 但是要注意相应的控件是否存在 不存在的 你自己画出来