Excel DataBar in VB.NET

The following program shows , how to do the frequenly used format in Excel page. Here we enter the data of a Mark List and format the page. First we MERGE excel cell and create the heading , then the students name and totals make as BOLD and create a border for the whole marklist part. Finally we select the range we want to add DataBar and select the color

After you run the source code you will get an Excel file its look like in the following picture.

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Imports Excel = Microsoft.Office.Interop.Excel
Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, _
  ByVal e As System.EventArgs) Handles Button1.Click

        Dim xlApp As Excel.Application
        Dim xlWorkBook As Excel.Workbook
        Dim xlWorkSheet As Excel.Worksheet
        Dim misValue As Object = System.Reflection.Missing.Value
        Dim chartRange As Excel.Range

        xlApp = New Excel.ApplicationClass
        xlWorkBook = xlApp.Workbooks.Add(misValue)
        xlWorkSheet = xlWorkBook.Sheets("sheet1")

        'add data
        xlWorkSheet.Cells(4, 2) = ""
        xlWorkSheet.Cells(4, 3) = "Student1"
        xlWorkSheet.Cells(4, 4) = "Student2"
        xlWorkSheet.Cells(4, 5) = "Student3"

        xlWorkSheet.Cells(5, 2) = "Term1"
        xlWorkSheet.Cells(5, 3) = "10"
        xlWorkSheet.Cells(5, 4) = "65"
        xlWorkSheet.Cells(5, 5) = "45"

        xlWorkSheet.Cells(6, 2) = "Term2"
        xlWorkSheet.Cells(6, 3) = "78"
        xlWorkSheet.Cells(6, 4) = "72"
        xlWorkSheet.Cells(6, 5) = "60"

        xlWorkSheet.Cells(7, 2) = "Term3"
        xlWorkSheet.Cells(7, 3) = "82"
        xlWorkSheet.Cells(7, 4) = "80"
        xlWorkSheet.Cells(7, 5) = "65"

        xlWorkSheet.Cells(8, 2) = "Term4"
        xlWorkSheet.Cells(8, 3) = "75"
        xlWorkSheet.Cells(8, 4) = "82"
        xlWorkSheet.Cells(8, 5) = "98"

        xlWorkSheet.Cells(9, 2) = "Total"
        xlWorkSheet.Cells(9, 3) = "315"
        xlWorkSheet.Cells(9, 4) = "299"
        xlWorkSheet.Cells(9, 5) = "238"

        chartRange = xlWorkSheet.Range("b2", "e3")
        chartRange.Merge()
        chartRange.FormulaR1C1 = "MARK LIST"
        chartRange.HorizontalAlignment = 3
        chartRange.VerticalAlignment = 3

        chartRange = xlWorkSheet.Range("b4", "e4")
        chartRange.Font.Bold = True
        chartRange = xlWorkSheet.Range("b9", "e9")
        chartRange.Font.Bold = True

        chartRange = xlWorkSheet.Range("b2", "e9")
        chartRange.BorderAround(Excel.XlLineStyle.xlContinuous, _
        Excel.XlBorderWeight.xlMedium, Excel.XlColorIndex. _
		ColorIndexAutomatic,Excel.XlColorIndex.xlColorIndexAutomatic)

        chartRange = xlWorkSheet.Range("c5", "e9")
        chartRange.FormatConditions.AddDatabar()
        chartRange.FormatConditions(chartRange.FormatConditions.Count) _
        .ShowValue = True
        chartRange.FormatConditions(chartRange.FormatConditions.Count). _
        SetFirstPriority()
        chartRange.FormatConditions(1).BarColor.color = 8061142
        chartRange.FormatConditions(1).BarColor.TintAndShade = 0

        xlWorkSheet.SaveAs("C:\vbexcel.xlsx")
        xlWorkBook.Close()
        xlApp.Quit()

        releaseObject(xlApp)
        releaseObject(xlWorkBook)
        releaseObject(xlWorkSheet)

        MsgBox("File created !")
    End Sub

    Private Sub releaseObject(ByVal obj As Object)
        Try
            System.Runtime.InteropServices.Marshal.ReleaseComObject(obj)
            obj = Nothing
        Catch ex As Exception
            obj = Nothing
        Finally
            GC.Collect()
        End Try
    End Sub
End Class

When you execute this program you will get a MarkList with databar