ByteScout Spreadsheet SDK – VB.NET – Calculations and Spreadsheet as Database

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ByteScout Spreadsheet SDK – VB.NET – Calculations and Spreadsheet as Database

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ByteScout-Spreadsheet-SDK-VB-NET-Calculations-and-Spreadsheet-as-Database.pdf

calculations and spreadsheet as database in VB.NET and ByteScout Spreadsheet SDK

Write code in VB.NET to make calculations and spreadsheet as database with this How-To tutorial

Sample source codes below will show you how to cope with a difficult task, for example, calculations and spreadsheet as database in VB.NET. ByteScout Spreadsheet SDK was made to help with calculations and spreadsheet as database in VB.NET. ByteScout Spreadsheet SDK is the SDK to create, read, modify and calculate spreadsheets. Formula calculations are supported, import and export to and from JSON, CSV, XML, databases, arrays.

VB.NET code snippet like this for ByteScout Spreadsheet SDK works best when you need to quickly implement calculations and spreadsheet as database in your VB.NET application. This VB.NET sample code should be copied and pasted into your application’s code editor. Then just compile and run it to see how it works. Further enhancement of the code will make it more vigorous.

ByteScout Spreadsheet SDK free trial version is available for download from our website. Free trial also includes programming tutorials along with source code samples.

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Form1.Designer.vb

      <Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Dim resources As System.ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(Form1))
        Me.GroupBox1 = New System.Windows.Forms.GroupBox
        Me.Button4 = New System.Windows.Forms.Button
        Me.TextBox4 = New System.Windows.Forms.TextBox
        Me.Label3 = New System.Windows.Forms.Label
        Me.TextBox3 = New System.Windows.Forms.TextBox
        Me.Label4 = New System.Windows.Forms.Label
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.Label2 = New System.Windows.Forms.Label
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.Label1 = New System.Windows.Forms.Label
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.Label5 = New System.Windows.Forms.Label
        Me.GroupBox1.SuspendLayout()
        Me.SuspendLayout()
        '
        'GroupBox1
        '
        Me.GroupBox1.Controls.Add(Me.Button4)
        Me.GroupBox1.Controls.Add(Me.TextBox4)
        Me.GroupBox1.Controls.Add(Me.Label3)
        Me.GroupBox1.Controls.Add(Me.TextBox3)
        Me.GroupBox1.Controls.Add(Me.Label4)
        Me.GroupBox1.Controls.Add(Me.TextBox2)
        Me.GroupBox1.Controls.Add(Me.Label2)
        Me.GroupBox1.Controls.Add(Me.TextBox1)
        Me.GroupBox1.Controls.Add(Me.Label1)
        Me.GroupBox1.Location = New System.Drawing.Point(12, 6)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(166, 212)
        Me.GroupBox1.TabIndex = 0
        Me.GroupBox1.TabStop = False
        '
        'Button4
        '
        Me.Button4.Font = New System.Drawing.Font("Microsoft Sans Serif", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(204, Byte))
        Me.Button4.Location = New System.Drawing.Point(9, 175)
        Me.Button4.Name = "Button4"
        Me.Button4.Size = New System.Drawing.Size(135, 23)
        Me.Button4.TabIndex = 14
        Me.Button4.Text = "Recalculate"
        Me.Button4.UseVisualStyleBackColor = True
        '
        'TextBox4
        '
        Me.TextBox4.Location = New System.Drawing.Point(9, 149)
        Me.TextBox4.Name = "TextBox4"
        Me.TextBox4.Size = New System.Drawing.Size(135, 20)
        Me.TextBox4.TabIndex = 13
        '
        'Label3
        '
        Me.Label3.AutoSize = True
        Me.Label3.Location = New System.Drawing.Point(6, 94)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(39, 13)
        Me.Label3.TabIndex = 12
        Me.Label3.Text = "Label3"
        '
        'TextBox3
        '
        Me.TextBox3.Location = New System.Drawing.Point(9, 110)
        Me.TextBox3.Name = "TextBox3"
        Me.TextBox3.Size = New System.Drawing.Size(135, 20)
        Me.TextBox3.TabIndex = 11
        '
        'Label4
        '
        Me.Label4.AutoSize = True
        Me.Label4.Location = New System.Drawing.Point(6, 133)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(39, 13)
        Me.Label4.TabIndex = 10
        Me.Label4.Text = "Label4"
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(9, 71)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.Size = New System.Drawing.Size(135, 20)
        Me.TextBox2.TabIndex = 9
        '
        'Label2
        '
        Me.Label2.AutoSize = True
        Me.Label2.Location = New System.Drawing.Point(6, 55)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(39, 13)
        Me.Label2.TabIndex = 8
        Me.Label2.Text = "Label2"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(9, 32)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(135, 20)
        Me.TextBox1.TabIndex = 7
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(6, 16)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(39, 13)
        Me.Label1.TabIndex = 6
        Me.Label1.Text = "Label1"
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(184, 12)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(100, 23)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "Load from XLS"
        Me.Button1.UseVisualStyleBackColor = True
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(184, 41)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(100, 23)
        Me.Button2.TabIndex = 2
        Me.Button2.Text = "Save to XLS"
        Me.Button2.UseVisualStyleBackColor = True
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(184, 70)
        Me.Button3.Name = "Button3"
        Me.Button3.Size = New System.Drawing.Size(100, 23)
        Me.Button3.TabIndex = 3
        Me.Button3.Text = "View in Excel"
        Me.Button3.UseVisualStyleBackColor = True
        '
        'Label5
        '
        Me.Label5.Location = New System.Drawing.Point(9, 236)
        Me.Label5.Name = "Label5"
        Me.Label5.Size = New System.Drawing.Size(275, 113)
        Me.Label5.TabIndex = 4
        Me.Label5.Text = resources.GetString("Label5.Text")
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(294, 372)
        Me.Controls.Add(Me.Label5)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.GroupBox1)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedToolWindow
        Me.Name = "Form1"
        Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
        Me.Text = "Simple Database"
        Me.GroupBox1.ResumeLayout(False)
        Me.GroupBox1.PerformLayout()
        Me.ResumeLayout(False)

    End Sub
    Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents TextBox3 As System.Windows.Forms.TextBox
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents TextBox4 As System.Windows.Forms.TextBox
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Button4 As System.Windows.Forms.Button
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents Label5 As System.Windows.Forms.Label

End Class

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Form1.vb

      Imports Bytescout.Spreadsheet
Imports System.Diagnostics

Public Class Form1
    Dim _spreadsheet As Spreadsheet
    Private Sub LoadXLS()
        Dim worksheet As Worksheet
        _spreadsheet = New Spreadsheet()
        _spreadsheet.LoadFromFile("Database.xls")

        worksheet = _spreadsheet.WorkBook.Worksheets(0)
        Label1.Text = worksheet.Cell("A1").Value
        TextBox1.Text = worksheet.Cell("A2").Value

        Label2.Text = worksheet.Cell("B1").Value
        TextBox2.Text = worksheet.Cell("B2").Value

        Label3.Text = worksheet.Cell("C1").Value
        TextBox3.Text = worksheet.Cell("C2").Formula

        Label4.Text = "Calculated value of C2"
        worksheet.Cell("C2").Calculate()
        TextBox4.Text = worksheet.Cell("C2").Value
    End Sub

    Private Sub SaveXLS()
        Dim worksheet As Worksheet

        worksheet = _spreadsheet.WorkBook.Worksheets(0)

        worksheet.Cell("A2").Value = System.Convert.ToInt32(TextBox1.Text)
        worksheet.Cell("B2").Value = System.Convert.ToInt32(TextBox2.Text)
        worksheet.Cell("C2").Formula = TextBox3.Text

        Try
            System.IO.File.Delete("Database.xls")
        Catch ex As Exception
        End Try

        _spreadsheet.SaveAs("Database.xls")
    End Sub

    Private Sub Form1_FormClosing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles MyBase.FormClosing
        SaveXLS()

        _spreadsheet.Close()
    End Sub


    Private Sub ReCalculate()
        Dim worksheet As Worksheet

        worksheet = _spreadsheet.Workbook.Worksheets(0)

        worksheet.Cell("A2").Value = System.Convert.ToInt32(TextBox1.Text)
        worksheet.Cell("B2").Value = System.Convert.ToInt32(TextBox2.Text)
        worksheet.Cell("C2").Formula = TextBox3.Text
        worksheet.Cell("C2").Calculate()
        TextBox4.Text = worksheet.Cell("C2").Value
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        ReCalculate()
    End Sub

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


    Private Sub TextBox_Recalculate(ByVal sender As System.Object, ByVal e As System.EventArgs)
        ReCalculate()
    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
        ' open in default spreadsheets viewer/editor
        SaveXLS()
        Try
            Process.Start("Database.xls")
        Catch
        End Try

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        LoadXLS()
        MessageBox.Show("Loaded from Database.xls")
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        SaveXLS()
        MessageBox.Show("Saved into Database.xls")
    End Sub
End Class