To read the entire worksheet in an Excel workbook through VB.net Code
By: Issac
In this tutorial we can see how to find the used area in a worksheet and the last data row in Excel. For finding last row we are using WorkSheet.UsedRange. It will return the last cell. The following code opens an Excel file and reads the entire content.
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 range As Excel.Range
Dim rCnt As Integer
Dim cCnt As Integer
Dim Obj As Object
xlApp = New Excel.ApplicationClass
xlWorkBook = xlApp.Workbooks.Open("c:\vbexcel.xlsx")
xlWorkSheet = xlWorkBook.Worksheets("sheet1")
range = xlWorkSheet.UsedRange
For rCnt = 1 To range.Rows.Count
For cCnt = 1 To range.Columns.Count
Obj = CType(range.Cells(rCnt, cCnt), Excel.Range)
MsgBox(Obj.value)
Next
Next
xlWorkBook.Close()
xlApp.Quit()
releaseObject(xlApp)
releaseObject(xlWorkBook)
releaseObject(xlWorkSheet)
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 source code it reads all content from the specified Excel file.
Archived Comments
1. Performance is low while working with BULK DATA
View Tutorial By: kailash at 2009-07-17 06:11:55
Comment on this tutorial
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