求用vbnet 实现先进先出即队列得源代码

VB.Net中的队列类在System.Collections.Generic命名空间中，名字叫Queue，是一个泛型类。

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实例化该类：

Dim myQueue As QueueInt32

myQueue = new QueueInt32();

然后可以通过Queue中的Enqueue和Dequeue函数进行入队出队操作：

With myQueue

.Enqueue(1)

.Enqueue(2)

.Enqueue(3)

.Enqueue(4)

.Enqueue(5)

End With

For i = 0 To 5 Step 1

Console.WriteLine(myQueue.Dequeue())

Next i

显示结果：

1

2

3

4

5

求VB.NET网站权限的源代码或实例

GRANT { { SELECT | INSERT | UPDATE | DELETE | REFERENCES | TRIGGER }

[,...] | ALL [ PRIVILEGES ] }

ON [ TABLE ] tablename [, ...]

TO { username | GROUP groupname | PUBLIC } [, ...] [ WITH GRANT OPTION ]

GRANT { { USAGE | SELECT | UPDATE }

[,...] | ALL [ PRIVILEGES ] }

ON SEQUENCE sequencename [, ...]

TO { username | GROUP groupname | PUBLIC } [, ...] [ WITH GRANT OPTION ]

GRANT { { CREATE | CONNECT | TEMPORARY | TEMP } [,...] | ALL [ PRIVILEGES ] }

ON DATABASE dbname [, ...]

TO { username | GROUP groupname | PUBLIC } [, ...] [ WITH GRANT OPTION ]

GRANT { EXECUTE | ALL [ PRIVILEGES ] }

ON FUNCTION funcname ( [ [ argmode ] [ argname ] argtype [, ...] ] ) [, ...]

TO { username | GROUP groupname | PUBLIC } [, ...] [ WITH GRANT OPTION ]

GRANT { USAGE | ALL [ PRIVILEGES ] }

ON LANGUAGE langname [, ...]

TO { username | GROUP groupname | PUBLIC } [, ...] [ WITH GRANT OPTION ]

GRANT { { CREATE | USAGE } [,...] | ALL [ PRIVILEGES ] }

ON SCHEMA schemaname [, ...]

TO { username | GROUP groupname | PUBLIC } [, ...] [ WITH GRANT OPTION ]

GRANT { CREATE | ALL [ PRIVILEGES ] }

ON TABLESPACE tablespacename [, ...]

TO { username | GROUP groupname | PUBLIC } [, ...] [ WITH GRANT OPTION ]

GRANT role [, ...] TO username [, ...] [ WITH ADMIN OPTION ]

希望对你有帮助

100分求一个用VB.net做的简单网页的代码，谢谢！！！

用vb.net做的校友录……（附所有源代码）

来源：不详 作者 佚名 点击数：31 录入时间：07-12-17 15:21:39

想必大家都上过校友录吧，里面的功能虽然不是很强大，但是为我们这些毕业之后各奔西东的学子来说，到真是提供了一个好的聚集点，下面是我用vb.net做的校友录，当然也不能说是校友录了，只能说是我们班的学友录了：）不过只要你掌握了这种编程思想，校友录就不在话下了。这里我将重点谈一下关于管理员权限赋予。

以前有这个想法的时候，难就难在管理员身份的赋予上，开始想如果一般用户在被提升为管理员之后，我可以把他的信息转到另外一个表中，以后登陆的时候先检查manage表中是否有他就行了，这种办法我已经实现了，是不是有些笨……可是正在我要正式开工的时候，一个想法突然冒了出来，是什么呢？呵呵，就是在数据库中再增加一个字段了如果是第一次注册就让这个字段item(int)的值为0，要是被提升之后就update为1，班级创始人呢？当然了，在他申请时付给他一个班级id，然后先判断班级id为这个已经注册的人信息条数是否为0，如果是，那么就付给他item=2好了。下面的代码中，我没有实现这个功能，因为我做的是班友录的，当然了，我就是管理员喽：）

在这里，我使用的是checkboxlist(两个)，一个用来转换数据（visibe=fause），一个用来显示数据，还有一个checkbox用来写全部选中的事件。当然了还有两个按钮事件，一个是用来提升为管理员的，一个是用来降级为一般用户的，这两个按钮在判断为一般用户时

enable都是为fause的，只有当判断登录为管理员时才为true。当然了，如果你是班级创始人，是不可能被降级的：）

这里用来显示信息的我用的是一个datagrid，当判断为非管理员时，删除栏的visible将为fause，为管理员的时候，才为true，也就是说只有管理员才可以删除信息。而不是注册的用户是不能发言的所有的按钮控件的enable将都为fause。

代码如下：board.aspx

%@ Page Language="vb" AutoEventWireup="false" Codebehind="boaman.aspx.vb" Inherits="_99re1.boaman"%

!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"

HTML

HEAD

title/title

meta content="Microsoft Visual Studio.NET 7.0" name="GENERATOR"

meta content="Visual Basic 7.0" name="CODE_LANGUAGE"

meta content="javascript" name="vs_defaultClientScript"

meta content="" name="vs_targetSchema"

/HEAD

body background="image/bg.gif" MS_POSITIONING="GridLayout"

form id="Form1" method="post" runat="server"

asp:checkbox id="yourcheck" style="Z-INDEX: 101; LEFT: 84px; POSITION: absolute; TOP: 71px" runat="server" Text="全部选中" AutoPostBack="True" ForeColor="SaddleBrown" Font-Bold="True"/asp:checkbox

asp:button id="Button1" style="Z-INDEX: 102; LEFT: 34px; POSITION: absolute; TOP: 43px" runat="server" Text="提升为管理员" Height="20px" Width="100px" BackColor="Gainsboro" BorderColor="Lavender" BorderWidth="2px" BorderStyle="Outset"/asp:button

asp:button id="Button2" style="Z-INDEX: 103; LEFT: 142px; POSITION: absolute; TOP: 43px" runat="server" Text="降级为一般用户" Height="20px" Width="100px" BackColor="Gainsboro" BorderColor="Lavender" BorderWidth="2px" BorderStyle="Outset"/asp:button

asp:checkboxlist id="CheckBoxList1" style="Z-INDEX: 104; LEFT: 14px; POSITION: absolute; TOP: 10px" runat="server" Visible="False"/asp:checkboxlist

asp:checkboxlist id="mycheck" style="Z-INDEX: 105; LEFT: 98px; POSITION: absolute; TOP: 99px" runat="server" ForeColor="Navy" Font-Size="X-Small"/asp:checkboxlist

asp:label id="Label1" style="Z-INDEX: 106; LEFT: 82px; POSITION: absolute; TOP: 14px" runat="server" ForeColor="Red" Font-Names="方正姚体"（已注册用户）/asp:label

asp:image id="Image1" style="Z-INDEX: 107; LEFT: 260px; POSITION: absolute; TOP: 180px" runat="server" Height="124px" Width="221px" ImageUrl="image/99re1-1.gif"/asp:image

asp:datagrid id="DataGrid1" style="Z-INDEX: 108; LEFT: 250px; POSITION: absolute; TOP: 83px" runat="server" Height="113px" Width="461px" BorderColor="#ffcc66" AutoGenerateColumns="False" HeaderStyle-Font-Size="9" HeaderStyle-HorizontalAlign="Center" HeaderStyle-ForeColor="red" HeaderStyle-Font-Bold="True"

Columns

asp:HyperLinkColumn ItemStyle-ForeColor="navy" ItemStyle-HorizontalAlign="Center" ItemStyle-Height="24" ItemStyle-Font-Size="9" DataNavigateUrlField="stu_id" DataNavigateUrlFormatString="querry.aspx?stu_id={0}" DataTextField="stu_id" HeaderText="学号"/asp:HyperLinkColumn

asp:BoundColumn ItemStyle-ForeColor="navy" ItemStyle-HorizontalAlign="Center" ItemStyle-Width="100" ItemStyle-Font-Size="9" DataField="tel" HeaderText="电话"/asp:BoundColumn

asp:BoundColumn ItemStyle-ForeColor="navy" ItemStyle-HorizontalAlign="Center" ItemStyle-Width="80" ItemStyle-Font-Size="9" DataField="oicq" HeaderText="OICQ"/asp:BoundColumn

asp:BoundColumn ItemStyle-ForeColor="navy" ItemStyle-HorizontalAlign="Center" ItemStyle-Width="140" ItemStyle-Font-Size="9" DataField="email" HeaderText="E-mail"/asp:BoundColumn

asp:BoundColumn ItemStyle-ForeColor="navy" ItemStyle-HorizontalAlign="Center" ItemStyle-Width="60" ItemStyle-Font-Size="9" DataField="point" HeaderText="登录次数"/asp:BoundColumn

/Columns

/asp:datagrid

/form

/body

/HTML

下面是codebehind中的内容：boaman.asp.vb

Imports System.Data

Imports System.Data.SqlClient

Public Class boaman

Inherits System.Web.UI.Page

Protected WithEvents yourcheck As System.Web.UI.WebControls.CheckBox

Protected WithEvents Button1 As System.Web.UI.WebControls.Button

Protected WithEvents CheckBoxList1 As System.Web.UI.WebControls.CheckBoxList

Protected WithEvents mycheck As System.Web.UI.WebControls.CheckBoxList

Protected WithEvents Label1 As System.Web.UI.WebControls.Label

Protected WithEvents Image1 As System.Web.UI.WebControls.Image

Protected WithEvents DataGrid1 As System.Web.UI.WebControls.DataGrid

Protected WithEvents Button2 As System.Web.UI.WebControls.Button

#Region " Web Form Designer Generated Code "

'This call is required by the Web Form Designer.

System.Diagnostics.DebuggerStepThrough() Private Sub InitializeComponent()

End Sub

Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init

'CODEGEN: This method call is required by the Web Form Designer

'Do not modify it using the code editor.

InitializeComponent()

End Sub

#End Region

Dim conn As SqlConnection = New SqlConnection("server=lixinri;uid=sa;pwd=;database=99re1")

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

'////////////////////判断是否为过客

If Session("stu_id") = "" Then

Button1.Enabled = False : Button2.Enabled = False

'////////////////////调用check()事件

check()

Else

If Not IsPostBack Then

Dim sql As String = "select * from pwd where stu_id=@stu_id"

Dim comm As SqlCommand = New SqlCommand(sql, conn)

comm.Parameters.Add(New SqlParameter("@stu_id", SqlDbType.Int, 4))

comm.Parameters("@stu_id").Value = Session("stu_id")

Dim dr As SqlDataReader

conn.Open()

dr = comm.ExecuteReader

While dr.Read

If dr.Item("term") = "0" Then

'///////////////////判断是否为一般用户

dr.Close()

Button1.Enabled = False : Button2.Enabled = False

Dim sql_1 As String = "select a.stu_id as stu_id,a.term,b.name as name,b.tel as tel,b.call as oicq,b.point as point,b.email from pwd a,stu_base b where a.stu_id=b.stu_id"

Dim cmd As New SqlCommand(sql_1, conn)

dr = cmd.ExecuteReader

While dr.Read

If dr.Item("term") = "1" Then

mycheck.Items.Add("u" dr.Item("name") "/u" "font color=darkorange(管理员)/font")

ElseIf dr.Item("term") = "2" Then

mycheck.Items.Add("u" dr.Item("name") "/u" "font color=red(班级创始人)font")

Else

mycheck.Items.Add("u" dr.Item("name") "/u")

End If

CheckBoxList1.Items.Add(dr.Item("stu_id"))

End While

Else

'////////////////////判断是否为管理员

dr.Close()

Button1.Enabled = True : Button2.Enabled = True

Dim sql_1 As String = "select a.stu_id as stu_id,a.term,b.name as name,b.tel as tel,b.call as oicq,b.point as point,b.email from pwd a,stu_base b where a.stu_id=b.stu_id"

Dim cmd As New SqlCommand(sql_1, conn)

dr = cmd.ExecuteReader

While dr.Read

If dr.Item("term") = "1" Then

mycheck.Items.Add("u" dr.Item("name") "/u" "font color=darkorange(管理员)/font")

ElseIf dr.Item("term") = "2" Then

mycheck.Items.Add("u" dr.Item("name") "/u" "font color=red(班级创始人)font")

Else

mycheck.Items.Add("u" dr.Item("name") "/u")

End If

CheckBoxList1.Items.Add(dr.Item("stu_id"))

End While

End If

End While

dr.Close()

'////////////////////////取出数据，填充dataset

Dim mysql As String = "select a.stu_id as stu_id,a.term,b.name as name,b.tel as tel,b.call as oicq,b.point as point,b.email from pwd a,stu_base b where a.stu_id=b.stu_id"

comm = New SqlCommand(mysql, conn)

Dim mycomm As SqlDataAdapter = New SqlDataAdapter(mysql, conn)

Dim ds As DataSet = New DataSet()

mycomm.Fill(ds, "base")

DataGrid1.DataSource = ds.Tables("base").DefaultView

DataGrid1.DataBind()

End If

End If

End Sub

'///////////////////////书写check()事件

Sub check()

If Not IsPostBack Then

Dim mysql As String = "select a.stu_id as stu_id,a.term,b.name as name,b.tel as tel,b.call as oicq,b.point as point,b.email from pwd a,stu_base b where a.stu_id=b.stu_id"

Dim comm As New SqlCommand(mysql, conn)

Dim dr As SqlDataReader

conn.Open()

dr = comm.ExecuteReader

While dr.Read

If dr.Item("term") = "1" Then

mycheck.Items.Add("u" dr.Item("name") "/u" "font color=darkorange(管理员)/font")

ElseIf dr.Item("term") = "2" Then

mycheck.Items.Add("u" dr.Item("name") "/u" "font color=red(班级创始人)font")

Else

mycheck.Items.Add("u" dr.Item("name") "/u")

End If

CheckBoxList1.Items.Add(dr.Item("stu_id"))

End While

dr.Close()

Dim mycomm As SqlDataAdapter = New SqlDataAdapter(mysql, conn)

Dim ds As DataSet = New DataSet()

mycomm.Fill(ds, "base")

DataGrid1.DataSource = ds.Tables("base").DefaultView

DataGrid1.DataBind()

End If

End Sub

'/////////////////////填充yourcheck

Private Sub yourcheck_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles yourcheck.CheckedChanged

Dim i As Integer

For i = 0 To mycheck.Items.Count - 1

If yourcheck.Checked Then

mycheck.Items(i).Selected = True

Else

mycheck.Items(i).Selected = False

End If

Next

End Sub

'///////////////////////提升一般用户为管理员

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

conn.Open()

Dim i As Integer

For i = 0 To mycheck.Items.Count - 1

If mycheck.Items(i).Selected Then

Dim sql_1 As String = "update pwd set term=1 where stu_id=@stu_id and term=0"

Dim comm As SqlCommand = New SqlCommand(sql_1, conn)

comm.Parameters.Add(New SqlParameter("@stu_id", SqlDbType.Int, 4))

comm.Parameters("@stu_id").Value = CheckBoxList1.Items(i).Text

comm.ExecuteNonQuery()

End If

Next

Response.Redirect("boaman.aspx")

End Sub

'///////////////////////降级管理员为一般用户

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

conn.Open()

Dim i As Integer

For i = 0 To mycheck.Items.Count - 1

If mycheck.Items(i).Selected Then

Dim sql_1 As String = "update pwd set term=0 where stu_id=@stu_id and term=1"

Dim comm As SqlCommand = New SqlCommand(sql_1, conn)

comm.Parameters.Add(New SqlParameter("@stu_id", SqlDbType.Int, 4))

comm.Parameters("@stu_id").Value = CheckBoxList1.Items(i).Text

comm.ExecuteNonQuery()

End If

Next

Response.Redirect("boaman.aspx")

End Sub

End Class

当然了，这里面还有好多不足的地方，恳求高手批评指正。

校友录还有一些其它的功能就很简单了，这里就不再探讨了。

求一个VB.NET进行局域网内UDP广播的源代码例子

给你个udp多播例子，广播不是很清楚，呵呵

Imports System.Net

Imports System.Net.Sockets

Imports System.Text

Public Class Form1

Inherits System.Windows.Forms.Form

Dim port As String

Dim ipadd As String

Dim ipend As IPEndPoint

Dim sendudp As New UdpClient()

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _

Handles Button1.Click

Dim ipadress As IPAddress

ipadress = IPAddress.Parse(TextBox1.Text)

'sendport = Int32.Parse(TextBox2.Text)

'ipend = New IPEndPoint(ipadress, sendport)

Try

sendudp.JoinMulticastGroup(ipadress)

MessageBox.Show("启动完成！")

Catch ex As Exception

MessageBox.Show(ex.Message)

End Try

End Sub

求vb.net的源代码，最好说明其解决问题，越多越好，满意加50分。

下面这段代码，是我用来计算每个月存500元进银行，连续30年，最后连本带利能有多少钱。这里面涉及复利计算。界面中右边的文本框用来输出每一次计算的结果。

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

  Dim nianxian As Integer '年限变量

  Dim dingcun As Integer '定存变量

  Dim fuli_big As Long '大复利

  Dim fuli_small As Long '小复利

  Dim i As Integer '循环变量

  Dim DATAstring As String '数据字符串

  nianxian = Val(年限_TextBox.Text)

  dingcun = Val(定存_TextBox.Text)

  DATAstring = ""

  For i = 1 To nianxian

      fuli_small = dingcun * (1 + 0.1875)

      dingcun = fuli_small

      fuli_big = fuli_big + fuli_small

      DATAstring = DATAstring + "[" + Trim(Str(i)) + "]" + Str(fuli_big) + Chr(13) + Chr(10)

      'DATAstring = DATAstring + "[" + Trim(Str(i)) + "]" + Str(fuli_small) + Chr(13) + Chr(10)

  Next

  'fuli_big = fuli_small

  TextBox1.Text = DATAstring

  结果_TextBox.Text = Str(fuli_big) + "元"

End Sub

能给我发个VB与三菱PLC通讯的源代码实例吗，非常感谢啊

得说明是什么型号的PLC啊，串口还是网口，VB6还是VB.NET？

算了，写段代码，VB.NET与Q系列以太网通讯的：

Imports System.Net

Imports System.Runtime.InteropServices

Public Class Form1

Dim Handle1 As Int32

Dim EntLink1 As Boolean

Dim ScanCount1 As Long

Dim PLC As New EntQsPlc_Asc.PlcClient'EntQsPlc_ASC.DLL是Q系列以太网通讯组件

Public Declare Function timeGetTime Lib "winmm.dll" () As UInt32

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

Me.CenterToScreen()

cmbReadMry.Items.Clear()

cmbReadMry.Items.Add("X")

cmbReadMry.Items.Add("Y")

cmbReadMry.Items.Add("M")

cmbReadMry.Items.Add("D")

cmbReadMry.Items.Add("R")

cmbReadMry.Items.Add("Z")

'

cmbWriteMry.Items.Clear()

cmbWriteMry.Items.Add("X")

cmbWriteMry.Items.Add("Y")

cmbWriteMry.Items.Add("M")

cmbWriteMry.Items.Add("D")

cmbWriteMry.Items.Add("R")

cmbWriteMry.Items.Add("Z")

'

cmbBitMry.Items.Clear()

cmbBitMry.Items.Add("X")

cmbBitMry.Items.Add("Y")

cmbBitMry.Items.Add("M")

'

cmbReadType.Items.Clear()

cmbReadType.Items.Add("INT16")

cmbReadType.Items.Add("UINT16")

cmbReadType.Items.Add("DINT32")

cmbReadType.Items.Add("HEX32")

cmbReadType.Items.Add("REAL32")

cmbReadType.Items.Add("BIN16")

'

cmbWriteType.Items.Clear()

cmbWriteType.Items.Add("INT16")

cmbWriteType.Items.Add("UINT16")

cmbWriteType.Items.Add("DINT32")

cmbWriteType.Items.Add("HEX32")

cmbWriteType.Items.Add("REAL32")

cmbWriteType.Items.Add("BIN16")

cmbReadMry.SelectedIndex = 3

cmbWriteMry.SelectedIndex = 3

cmbBitMry.SelectedIndex = 2

cmbReadType.SelectedIndex = 0

cmbWriteType.SelectedIndex = 0

lstRead.Items.Clear()

txtWrite.Text = ""

'

cmbCmdType.SelectedIndex = 0

End Sub

Private Sub butLink_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butLink.Click

Dim re As Short

Dim restr As String = ""

re = PLC.EntLink(Trim(txtLocalIP.Text), Val(txtLocalPort.Text), Trim(txtRemoteIP.Text), Val(txtRemotePort.Text), "DEMO", Handle1, 1000, CBool(cmbCmdType.SelectedIndex))

txtReLink.Text = re.ToString

If re = 0 Then

EntLink1 = True

MsgBox("PLC联接成功! ")

Else

EntLink1 = False

MsgBox("PLC联接失败: "  restr)

End If

End Sub           

Private Sub butClose_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butClose.Click

Dim re As Short

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

re = PLC.DeLink(Handle1)

txtReClose.Text = re.ToString

End Sub

Private Sub butRead_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butRead.Click

Dim re As Short

Dim i As Short

Dim RD() As Object

ReDim RD(Val(txtReadCnt.Text - 1))

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

' Exit Sub

End If

Dim mry As EntQsPlc_Asc.PlcClient.PlcMemory = cmbReadMry.SelectedIndex + 1

Dim typ As EntQsPlc_Asc.PlcClient.DataType = cmbReadType.SelectedIndex + 1

re = PLC.CmdRead(Handle1, mry, typ, CInt(txtReadAdd.Text), CUShort(txtReadCnt.Text), RD)

txtReRead.Text = re.ToString

lstRead.Items.Clear()

For i = 0 To UBound(RD) Step 1

If Not IsNothing(RD(i)) Then lstRead.Items.Add(RD(i))

Next i

If re  0 Then

Timer1.Enabled = False

butScan.Text = "Cycle R/W"

End If

End Sub

Private Sub butWrite_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butWrite.Click

Dim re As Short

Dim i As Short

Dim temp() As String

Dim WD() As Object

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

ReDim WD(Val(txtWriteCnt.Text) - 1)

temp = Split(txtWrite.Text, vbCrLf)

For i = 0 To UBound(WD) Step 1

If i  UBound(temp) Then

WD(i) = 0

Else

WD(i) = Trim(temp(i))

End If

Next i

Dim mry As EntQsPlc_Asc.PlcClient.PlcMemory = cmbWriteMry.SelectedIndex + 1

Dim typ As EntQsPlc_Asc.PlcClient.DataType = cmbWriteType.SelectedIndex + 1

re = PLC.CmdWrite(Handle1, mry, typ, CInt(txtWriteAdd.Text), CUShort(txtWriteCnt.Text), WD)

txtReWrite.Text = re.ToString

If re  0 Then

Timer1.Enabled = False

butScan.Text = "Cycle R/W"

End If

End Sub

Private Sub butScan_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butScan.Click

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

Timer1.Enabled = Not Timer1.Enabled

If Timer1.Enabled Then

ScanCount1 = 0

butScan.Text = "Stop R/W"

Else

butScan.Text = "Cycle R/W"

End If

End Sub

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick

Timer1.Enabled = False

Dim tim As Integer = timeGetTime

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

'

Call butRead_Click(Nothing, Nothing)

Call butWrite_Click(Nothing, Nothing)

'

If (Val(txtReRead.Text)  0) Or (Val(txtReWrite.Text)  0) Then

butScan.Text = "Cycle R/W"

Exit Sub

Else

ScanCount1 += 1

txtScanCnt.Text = ScanCount1

txtScanPrd.Text = (timeGetTime - tim)  "ms"

End If

Timer1.Enabled = True

End Sub

Private Sub butBitTest_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butBitTest.Click

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

Dim rd As Boolean

Dim re As Short

Dim mry As EntQsPlc_Asc.PlcClient.PlcMemory = cmbBitMry.SelectedIndex + 1

re = PLC.Bit_Test(Handle1, mry, CUShort(txtBitAdd.Text), rd)

txtBitTest.Text = rd

txtReBit.Text = re

End Sub

Private Sub butBitSet_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butBitSet.Click

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

Dim re As Short

re = PLC.Bit_Set(Handle1, cmbBitMry.SelectedIndex + 1, Val(txtBitAdd.Text))

txtReBit.Text = re

End Sub

Private Sub butBitRst_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butBitRst.Click

If Not EntLink1 Then

MsgBox("还未与PLC建立联接！")

Exit Sub

End If

Dim re As Short

re = PLC.Bit_Reset(Handle1, cmbBitMry.SelectedIndex + 1, Val(txtBitAdd.Text))

txtReBit.Text = re

End Sub

End Class

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