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用vb.net做一个 VBNET有什么用

怎样用vb.net做一个图片浏览器?

在自定义工具箱中选择dirlistbox,drivelistbox,filelistbox,添加这3个控件,然后在窗体上添加这些控件和一个picturebox控件,代码如下:

按需求定制制作可以根据自己的需求进行定制,做网站、网站建设构思过程中功能建设理应排到主要部位公司做网站、网站建设的运用实际效果公司网站制作网站建立与制做的实际意义

Public Class Form1

Private Sub DirListBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DirListBox1.SelectedIndexChanged

FileListBox1.Path = DirListBox1.Path

End Sub

Private Sub DriveListBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DriveListBox1.SelectedIndexChanged

DirListBox1.Path = DriveListBox1.Drive

End Sub

Private Sub FileListBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles FileListBox1.SelectedIndexChanged

PictureBox1.Image = Image.FromFile(FileListBox1.Path + "\" + FileListBox1.SelectedItem.ToString())

End Sub

End Class

你可以自己在修改下,这只是个模型,呵呵!

用VB.net做一个时间计时器

'添加一个label标签名字label1 用来显示时间

'再添加一个timer控件 名字timer1 interval属性=1000 用来计时

'窗体添加代码

Dim t As Date '用来记录时间

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As _

System.EventArgs) Handles Timer1.Tick

t = t.AddSeconds(1)

Label1.Text = "登录时间:" t.TimeOfDay.ToString

End Sub

vb.net做一个程序,求教

1,窗体上使用容器控件比如:Panel,在容器控件里添加文本框,用来显示滚动的号码。

2,添加一个Timer控件,用来不断改变上述文本框的Top属性,实现不断向上滚动的动态效果。

3,使用系统的随机函数,生成所想要的适当位数的随机数,单击按钮,停止滚动,显示随机数。

4,用数组保存产生的随机数,再次停止,与已经产生的保存在数组里的随机进行比较,如果重复,就重新生成随机数,直到不重复。

vb.net 编写一个函数

注意:参数为动态数组;

Private Function MyF(ByRef d() As Integer)

ReDim d(4, 13) As Integer

Dim i As Integer

Dim j As Integer

Dim n As Integer

Dim MyNum(4) As Integer

For i = 1 To 4

MyNum(i) = 0

Next i

Randomize

For i = 1 To 4

For j = 1 To 13

n = Int(Rnd * 4 + 1)

Do While MyNum(n) = 13

n = Int(Rnd * 4 + 1)

Loop

d(i, j) = n

MyNum(n) = MyNum(n) + 1

Next j

Next i

End Function

VB.net做一个小程序 求教

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

Dim oleDbConnection1 As OleDb.OleDbConnection

Dim oledbDataAdapter As OleDb.OleDbDataAdapter

Dim oledbData As DataSet = New DataSet

Dim strConnect As String = "Provider= OraOLEDB.Oracle;Data Source=888;User ID=888;Password=888;"

oleDbConnection1 = New System.Data.OleDb.OleDbConnection(strConnect)

Dim strSql As String

strSql = "select *" " from xx"

Dim oledbCommand As OleDb.OleDbCommand

oledbCommand.CommandText = strSql

oledbCommand.CommandType = CommandType.Text

oledbCommand.Connection = oleDbConnection1

oledbDataAdapter.SelectCommand = oledbCommand

oleDbConnection1.Open()

oledbDataAdapter.Fill(oledbData, "gy_bingrenxx")

oleDbConnection1.Close()

'在窗体上添加一个DataGridView控件,在这个位置加一句代码

DataGridView1.DataSource = oledbDataAdapter.Tables("gy_bingrenxx")

End Sub

我想用vb.net做一个Windows窗口应用程序;

可以实现

搞个button,点击的时候连接数据库,写入数据

再搞个button,点击的时候,连接数据库,查询数据,显示在datagridview里面(将查询到的数据存在datatable中,再把datatable赋给datagridview的datasource就可以了)


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