form1.vb

作业练习题 你们

Imports System.Data.SqlClient
Public Class Form1
    Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    '窗体重写处置以清理组件列表。
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意：以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents Button1 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Button1 = New System.Windows.Forms.Button()
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(152, 184)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(104, 40)
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "直方图"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(8, 18)
        Me.ClientSize = New System.Drawing.Size(456, 260)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Button1})
        Me.Name = "Form1"
        Me.Text = "应用Excel制作直方图"
        Me.ResumeLayout(False)

    End Sub

#End Region
    Dim con As New SqlConnection("server=localhost;database=northwind;" _
    & "integrated security=true")
    Dim adapter As New SqlDataAdapter("select * from employeeamount", con)
    Dim myset As New DataSet()
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        adapter.Fill(myset, "emp")
        Dim myexcel As New Excel.Application()
        myexcel.Visible = True
        myexcel.Workbooks.Add()
        myexcel.Worksheets("sheet1").Activate()
        myexcel.Cells(1, 1).value = "雇员销售业绩直方图"
        Dim col = 0
        Dim row = 0
        For col = 0 To 1
            For row = 0 To myset.Tables("emp").Rows.Count - 1
                myexcel.Cells(row + 2, col + 1).value = myset.Tables("emp").Rows(row)(col)
            Next
        Next
        '做直方图
        myexcel.Range("a2:b" & row + 1).Select()
        myexcel.Charts.Add()
        myexcel.ActiveChart.ChartType = 51 '从51开始，51表示平面直方图
        myexcel.ActiveChart.HasTitle = True
        myexcel.ActiveChart.ChartTitle.Characters.Text = "销售业绩表"
        '定义Y坐标轴
        myexcel.ActiveChart.Axes(Excel.XlAxisType.xlValue, Excel.XlAxisGroup.xlPrimary).HasTitle = True
        myexcel.ActiveChart.Axes(Excel.XlAxisType.xlValue, Excel.XlAxisGroup.xlPrimary).AxisTitle.Characters.Text = "订单金额"
        '定义X坐标轴
        myexcel.ActiveChart.Axes(Excel.XlAxisType.xlCategory, Excel.XlAxisGroup.xlPrimary).HasTitle = True
        myexcel.ActiveChart.Axes(Excel.XlAxisType.xlCategory, Excel.XlAxisGroup.xlPrimary).AxisTitle.Characters.Text = "雇员号"
    End Sub
End Class