EXPORTING THE CONTENT OF A DATASOURCE INTO EXCEL

Hi fellows, this post is about exporting the content of your data source (dataset, data table, data grid) into MS-Excel using VB.NET. All you need to is to read the data from your data source into a 2-dimensional array and then send the content straight to excel. With this you don’t have to be adding rows to excel one after the other.

Let’s start, we have a data table called “dsstudents” with 5 columns “IndexNo, Name, Year Group, Program, Gender”. We then declare a variable Private Students(,) As String as our 2-dimensional array. We are then ready to go (code). Note that we are using late binding to the excel objects here, thus we are not referencing the excel object at the design time but it’s done in runtime.

Below are two methods that will get the job done. Cheers!!!!

Private Sub readContent()

If Me.dsStudent.Rows.Count > 0 Then
ReDim Me.courses(Me.dsStudent.Rows.Count + 2, 7)

For i As Integer = 0 To
Me.dsStudent.Rows.Count – 1

‘setting the column headers for each column

students(0, 0) = "Index No"

students(0, 1) = "Students’ Name"

students(0, 5) = "Year group"

students(0, 6) = "Program Name"

students(0, 11) = "Student Gender"

‘getting the actual content from our datasource

students(i + 2, 0) = Me.dsStudent.Rows(i)(0).ToString

students(i + 2, 1) = Me.dsStudent.Rows(i)(1).ToString

students(i + 2, 3) = Me.dsStudent.Rows(i)(2).ToString

students(i + 2, 4) = Me.dsStudent.Rows(i)(3).ToString

students(i + 2, 5) = Me.dsStudent.Rows(i)(4).ToString

Next

createExcel()

End If

End Sub

The implementation of the createExcel() method

Private Sub createExcel()

Dim oExcel As Object

Dim oBook As Object

Dim oSheet As Object

‘Start a new workbook in Excel.

oExcel = CreateObject("Excel.Application")

oBook = oExcel.Workbooks.Add

‘Add headers to the worksheet on row 1.

oSheet = oBook.Worksheets(1)

oSheet.Range("c1").Value = "EXPORTING DATASOURCE CONTENT INTO EXCEL"

‘Sending the data to Excel by specifying where to start from (cell) and the rows and ‘columns need.

oSheet.Range("B8").Resize(Me.dsStudent.Rows.Count + 2, 7).Value = Me.setudent

oExcel.visible = True

oSheet = Nothing

oBook = Nothing

oExcel.quit()

oExcel = Nothing

GC.Collect()

End Sub

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