vb.net各種控件教程 vb用代码创建控件

vb.net怎么使用表格控件？

DataGridView控件，放一个DataGridView1和Button1到窗体，下面是按钮下代码

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

Me.DataGridView1.AllowUserToAddRows = False

DataGridView1.RowTemplate.Height = 200

DataGridView1.AutoSizeRowsMode = DataGridViewAutoSizeRowsMode.None

For i = 1 To 3

Me.DataGridView1.Columns.Add("列" i.ToString, "列" i.ToString)

Me.DataGridView1.Rows.Add()

Next

Me.DataGridView1.Columns(0).Width = 100

Me.DataGridView1.Columns(1).Width = 500

Me.DataGridView1.Columns(0).Width = 300

End Sub

'自己设置相关需要的属性即可

VB下如何使用iPlotLibrary控件

VB.NET的iPlotLibrary控件是VB.NET最常用也最简单的一种控件。下面介绍一下如何使用iPlotLibrary控件。

新建一个VB.NET新程序

左侧工具箱选择‘iPlotLibrary’控件

中间桌布上拖动，放在中间

iPlotLibrary控件最常用的两个属性：name。一般使用简写的Btn来代表iPlotLibrary按钮，IT业内的规定。

另一个常用的属性，Text。用来显示我们当前的按钮文字，默认是iPlotLibrary1。

双击iPlotLibrary控件属性，自动进入click事件。click事件的意思是只要单击iPlotLibrary控件，就会触发事件，这个事件就是代码中所写的要弹出的对话框hello world！

使用按键F5，调试运行。结果如下，这样便是成功了。

求VB.net datagrid 控件的使用方法（入门级）

Dim tab1 As String

Dim DS As New DataSet

Dim SqlStr As String

Dim DTS_A As New DataGridTableStyle

Dim Col_A1, Col_A2, Col_A3 As New DataGridTextBoxColumn

Dim Col_bo As New DataGridBoolColumn

'DS.Tables("tab1").Columns.Add("check", System.Type.GetType("System.Boolean"))

'DS.Tables("tab1").Columns("check").DefaultValue = False

Dim Col_A() As DataGridColumnStyle = {Col_bo, Col_A1, Col_A2, Col_A3}

'主窗口

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

ProgressBar1.Hide()

grdStyles("tab1")

SQLConn(conn)

Dim i As Integer

'Dim arr As New ArrayList

SqlStr = "SELECT ID, diqu, dname FROM a_diqu Order by ID"

If Not SQLFill(conn, DA, DS, SqlStr, "diqu") Then

MsgBox("服务器连接失败")

Else

Dim dr As DataRow

For Each dr In DS.Tables("diqu").Rows

'arr.Add(dr("diqu") "." dr("dname"))

cmbDiqu.Items.Add(dr("diqu") "." dr("dname"))

Next

End If

'cmbDiqu.DataSource = arr

cmbDiqu.SelectedIndex = -1

cmbDiqu.Text = ""

End Sub

'DataGrid格式

Private Sub grdStyles(ByVal tab As String)

Dim ii1 As Integer

Dim DTS_A1() As String = {"check", "fshortnumber", "fnumber", "fplanprice"}

Dim DTS_A2() As String = {"检查框", "货号", "上市月份", "单价"}

Dim DTS_A3() As Integer = {50, 120, 120, 120} '长度

Dim DTS_A4() As Integer = {2, 0, 2, 1} '对齐方式

DTS_A.MappingName = tab

DTS_A.GridColumnStyles.Clear()

DTS_A.AllowSorting = True

DTS_A.ReadOnly = True

DTS_A.BackColor = Color.DarkGray

DTS_A.AlternatingBackColor = Color.LightGray

For ii1 = 0 To DTS_A1.Length - 1

Col_A(ii1).MappingName = DTS_A1(ii1)

Col_A(ii1).HeaderText = DTS_A2(ii1)

Col_A(ii1).Width = DTS_A3(ii1)

Col_A(ii1).NullText = ""

Col_A(ii1).Alignment = DTS_A4(ii1)

Next

DTS_A.GridColumnStyles.AddRange(Col_A)

grdItem.TableStyles.Add(DTS_A)

grdItem.ReadOnly = True

End Sub

Private Sub fICitem_Closed(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Closed

SQLClose(conn)

End Sub

'显示表单

Private Sub Show1()

grdStyles("tab1")

txtNum.Text = Trim(txtNum.Text)

grdItem.DataSource = Nothing

SQLStr = "select * from t_icitem_new"

SQLStr = " where fshortnumber like '" txtNum.Text "%'"

SQLStr = " order by fshortnumber"

SQLFill(conn, DA, DS, SQLStr, tab1)

grdItem.CaptionText = "货号资料"

grdItem.DataSource = DS.Tables(tab1)

ShowRow()

End Sub

'数据同步显示

Private Sub ShowRow()

Dim dr As DataRow

If DS.Tables(tab1).Rows.Count 0 Then

If grdItem.CurrentRowIndex DS.Tables(tab1).Rows.Count Then

grdItem.CaptionText = grdItem.CurrentRowIndex + 1 "/" DS.Tables(tab1).Rows.Count

dr = DS.Tables(tab1).Rows(grdItem.CurrentRowIndex)

txtNum.Text = dr.Item("fshortnumber")

txtPrice.Text = dr.Item("fplanprice")

cmbMonth.Text = dr.Item("fnumber")

Else

txtNum.Text = ""

txtPrice.Text = ""

cmbMonth.Text = ""

End If

Else

txtNum.Text = ""

txtPrice.Text = ""

cmbMonth.Text = ""

End If

End Sub

Private Sub grdItem_CurrentCellChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles grdItem.CurrentCellChanged

ShowRow()

End Sub

'鼠标选定行

Private Sub grdItem_CurrentCellChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles grdItem.CurrentCellChanged

ShowRow()

End Sub

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

Handles btnSelect.Click, btnUpdate.Click, btnInsert.Click, btnDelete.Click

Select Case sender.name

Case "btnSelect" '查询

Show1()

Case "btnUpdate" '修改

SUpdate()

Case "btnInsert" '新增

SInsert()

Case "btnDelete" '删除

SDelete()

End Select

End Sub

'修改

Private Sub SUpdate()

txtNum.Text = Trim(txtNum.Text)

txtPrice.Text = Trim(txtPrice.Text)

If MsgBox("确定更新？", MsgBoxStyle.YesNo) = MsgBoxResult.Yes Then

SQLStr = "UPDATE t_icitem_new SET "

SQLStr = "fnumber='" cmbMonth.SelectedItem "', "

SQLStr = "fplanprice='" txtPrice.Text "' "

SQLStr = "WHERE fshortnumber='" txtNum.Text "'"

If Not SQLFill2(conn, SQLStr) Then

MsgBox("抱歉，更新失败:(")

End If

Show1()

End If

End Sub

'新增

Private Sub SInsert()

txtNum.Text = Trim(txtNum.Text)

txtPrice.Text = Trim(txtPrice.Text)

If MsgBox("确定新增？", MsgBoxStyle.YesNo) = MsgBoxResult.Yes Then

SQLStr = "SELECT fshortnumber "

SQLStr = "FROM t_icitem_new "

SQLStr = "WHERE fshortnumber = '" txtNum.Text "' "

SQLFill(conn, DA, DS, SQLStr, "Tmp")

If DS.Tables("Tmp").Rows.Count = 0 Then '如果没有资料则新增

SQLStr = "INSERT INTO t_icitem_new (fshortnumber,fnumber,fplanprice) VALUES("

SQLStr = "'" txtNum.Text "', "

SQLStr = "'" cmbMonth.SelectedItem "', "

SQLStr = "'" txtPrice.Text "')"

If Not SQLFill2(conn, SQLStr) Then

MsgBox("抱歉，新增失败:(")

End If

Show1()

Else

MsgBox("资料已存在")

End If

End If

End Sub

'删除

Private Sub SDelete()

txtNum.Text = Trim(txtNum.Text)

txtPrice.Text = Trim(txtPrice.Text)

If MsgBox("确定删除" txtNum.Text "？", MsgBoxStyle.YesNo + MsgBoxStyle.DefaultButton2) = MsgBoxResult.Yes Then

SQLStr = "DELETE FROM t_icitem_new "

SQLStr = "WHERE fshortnumber='" txtNum.Text "'"

If Not SQLFill2(conn, SQLStr) Then

MsgBox("抱歉，删除失败:(")

End If

Show1()

End If

'键盘顺序

Private Sub txt_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) _

Handles txtFshop.KeyDown, txtItem.KeyDown

Select Case e.KeyCode

Case Keys.Return

SendKeys.Send("{TAB}")

Case Keys.Right

SendKeys.Send("{TAB}")

Case Keys.Left

SendKeys.Send("+{TAB}")

Case Keys.Down

SendKeys.Send("{TAB 10}")

Case Keys.Up

SendKeys.Send("+{TAB 10}")

End Select

End Sub

vb.net自定义控件问题

首先，你已经完成的步骤是：

1.新建一个用户控件[注意，用户控件（UserControl）不是自定义控件（CustomControl）]

2.给用户控件起个名字（我在此处起名叫 RadioList）

3.在用户控件上画一个 GroupBox，命名为 RadioGroup，

并将其 Dock 属性设置为 Fill

然后，你需要做的是动态增减控件。

如果你以前用过 VB 6，你可能会想到控件数组，

但在此处，你可以直接增删控件。

具体实现如下：

4.在 GroupBox 里画一个 FlowLayoutPanel，命名为 RadioPanel，

将其 AutoScroll 属性设置为 True，即自动显示滚动条，

并设置其 FlowDirection 属性（例如设置为 TopDown）

这样就省去了手动调整 RadioButton 位置的麻烦

5.实现选项的动态增减（以下只是我的思路，你可以发挥一下）

（十分简洁，注释除外）：

''' summary

''' 创建一个新的 RadioButton。

''' /summary

Private Function CreateRadio() As RadioButton

Dim NewRadio As New RadioButton

components.Add(NewRadio)

'components 字段由控件设计器自动创建，

'此代码目的是使控件在销毁（Dispose）时能自动销毁 RadioButton

'详情参见 RadioList.Designer.vb

NewRadio.Parent = RadioPanel

'设置容器

AddHandler NewRadio.CheckedChanged, AddressOf RadioButtons_CheckedChanged

'设置事件处理程序

Return NewRadio

End Function

''' summary

''' 移除已存在的 RadioButton。

''' /summary

Private Sub RemoveRadio(ByVal dest As RadioButton)

components.Remove(dest)

dest.Dispose()

End Sub

'无中生有的 RadioButton 的事件处理程序

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

'在此处设置选中项的属性，通过 sender 来确定不同的 OptionButton

'你可以通过将 OptionButton 放在一个列表，

'如 List(Of OptionButton) 中来像数组一样维护选项的次序

'注意，此处需要判断 sender 的 Checked 属性是否为 True

'因为 Changed 是“改变”，而不是“选中”

'例如：

If DirectCast(sender, RadioButton).Checked Then

SelectedIndex = ...

End If

End Sub