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Hello Expert,

In My project I have SQL and Excel report,we need to generate report for every Four Hours. We have following Issue.

The Four Hours data - 30,000 Rows with 7 Column in SQL DATABSE , By using current code , For generating report takes more than 15 min . So Can you please guide me , How I can write code So My report will generate in (Max) 1 min Time.
VB
Private Sub ButtonReport_Click(sender As Object, e As EventArgs) Handles ButtonReport.Click
 
 
        'Clear connection and dataset before open
        con.Close()
        ds.Clear()
        ' used for excel report
        Dim r, c As Integer
        'To handle exception use here Try catach
 
        ' Visible progress bar
        ' ProgBarReport.Visible = True
        ProgBarReport.Value = 0
        LabelReport.ResetText()
 
        Try
            'Open connection 
            con.Open()
 
            Dim StartDateRpt = Format(DateTimePickerRptStrt.Value, "yyyy-MM-dd HH:mm:ss")
            Dim EndDateRpt = Format(DateTimePickerRptEnd.Value, "yyyy-MM-dd HH:mm:ss")
 
            Dim query As String = "SELECT * FROM [ReportDatabase03].[dbo].[Past03] WHERE Date_Time Between '" + StartDateRpt + "'  and '" + EndDateRpt + "' order by Date_Time desc"
 
 
            adpt.SelectCommand = New SqlCommand(query, con)
            ds = New DataSet("wincc")
            adpt.Fill(ds)
 
            Dim i As Integer
 
            ' Standard for Excel application
            Dim xlApp As Excelr.Application
            Dim xlWorkBook As Excelr.Workbook
            Dim xlWorkSheet As Excelr.Worksheet
            Dim misValue As Object = System.Reflection.Missing.Value
            xlApp = New Excelr.Application
 
            ' ------- Read Sample Report Location from Text file ------
            'Dim Srpath As String = "c:\mysettxtup\samplereport.txt"
            'Dim Srobjectreader As New System.IO.StreamReader(Srpath)
            'Dim Srpathstring As String = Srobjectreader.ReadLine
 
 
            ' ------- Read Sample Report Location from Text file  ------
            ' xlWorkBook = xlApp.Workbooks.Add(Srpathstring & "\SampleReport")
 
            '******  Chanage above hardcode to read excel template from D drive sampleRepport ********
 
            xlWorkBook = xlApp.Workbooks.Add("D:\mysettxtup\ParagReportSamplePast03")
 
            ' ------- Save as Report Location from Text file  ------
            '   Dim Slrpath As String = "c:\mysettxtup\Savereport.txt"
            ' Dim Slrobjectreader As New System.IO.StreamReader(Slrpath)
            ' Dim Slrpathstring As String = Slrobjectreader.ReadLine
            xlWorkSheet = xlWorkBook.Sheets("ParagReport")
 
            r = ds.Tables(0).Rows.Count ' 7 add here because we start 1 record from 8th row
            c = ds.Tables(0).Columns.Count
 
            ProgBarReport.Step = ds.Tables(0).Rows.Count * 2
            ProgBarReport.Maximum = ds.Tables(0).Rows.Count
 
            ' MessageBox.Show(r, c)
            ' Print Table Row with column of worksheet
            For i = 0 To ds.Tables(0).Rows.Count - 1
                Label_R.Text = r
                Label_C.Text = c
                Label_I.Text = i
                Dim dateValue = ds.Tables(0).Rows(i).Item(0)
                Dim xxx = Format(dateValue, "dd/MMM/yy HH:mm:ss.fff")
                xlWorkSheet.Cells(i + 13, 1) = Format(dateValue, "dd-MM-yyyy HH:mm:ss:fff") 'Coulmn B- "Date & time"
                xlWorkSheet.Cells(i + 13, 2) = Format(ds.Tables(0).Rows(i).Item(1), "") 'Coulmn E - "Customer Part No"
                xlWorkSheet.Cells(i + 13, 3) = Format(ds.Tables(0).Rows(i).Item(2), "") 'Coulmn F - "Tenneco FG SAP part No"
                xlWorkSheet.Cells(i + 13, 4) = Format(ds.Tables(0).Rows(i).Item(3), "") 'Coulmn G - "Tenneco FG increment Sr .No"
                xlWorkSheet.Cells(i + 13, 5) = Format(ds.Tables(0).Rows(i).Item(4), "") 'Coulmn H - "Tenneco canning SAP part No 1"
                xlWorkSheet.Cells(i + 13, 6) = Format(ds.Tables(0).Rows(i).Item(5), "") 'Coulmn H - "Tenneco canning SAP part No 2"
                xlWorkSheet.Cells(i + 13, 7) = Format(ds.Tables(0).Rows(i).Item(6), "") 'Coulmn I - " Canning  Sr.No from Scan"
                xlWorkSheet.Cells(i + 13, 8) = Format(ds.Tables(0).Rows(i).Item(7), "") 'Coulmn I - " Canning  Sr.No from Scan"
                xlWorkSheet.Cells(i + 13, 9) = Format(ds.Tables(0).Rows(i).Item(8), "") 'Coulmn I - " Canning  Sr.No from Scan"
                xlWorkSheet.Cells(i + 13, 10) = Format(ds.Tables(0).Rows(i).Item(9), "") 'Coulmn I - " Canning  Sr.No from Scan"
                xlWorkSheet.Cells(i + 13, 11) = Format(ds.Tables(0).Rows(i).Item(10), "") 'Coulmn I - " Canning  Sr.No from Scan"
                xlWorkSheet.Cells(i + 13, 12) = Format(ds.Tables(0).Rows(i).Item(11), "") 'Coulmn I - " Canning  Sr.No from Scan"
                xlWorkSheet.Cells(i + 13, 13) = Format(ds.Tables(0).Rows(i).Item(12), "") 'Coulmn I - " Canning  Sr.No from Scan"
                xlWorkSheet.Cells(i + 13, 14) = Format(ds.Tables(0).Rows(i).Item(13), "") 'Coulmn I - " Canning  Sr.No from Scan"
                xlWorkSheet.Cells(i + 13, 15) = Format(ds.Tables(0).Rows(i).Item(14), "") 'Coulmn I - " Canning  Sr.No from Scan"
                xlWorkSheet.Cells(i + 13, 16) = Format(ds.Tables(0).Rows(i).Item(15), "") 'Coulmn I - " Canning  Sr.No from Scan"
                xlWorkSheet.Cells(i + 13, 17) = Format(ds.Tables(0).Rows(i).Item(16), "") 'Coulmn I - " Canning  Sr.No from Scan"
                '~~> Progress Bar 
                ' ProgBarReport.PerformStep()
                ProgBarReport.Increment(1)
            Next
 
            ' Excel Animation
            With xlWorkSheet
                xlWorkSheet.Cells(6, 2) = Format(Now, "dd/MMM/yy HH:mm")
                xlWorkSheet.Cells(7, 2) = Format(ds.Tables(0).Rows(0).Item(0), "dd/MMM/yy HH:mm:ss")
                xlWorkSheet.Cells(8, 2) = Format(ds.Tables(0).Rows(r - 1).Item(0), "dd/MMM/yy HH:mm:ss")
                xlWorkSheet.Columns("A:Q").EntireColumn.AutoFit()
                .Protect()
            End With
 
            ' Save Excel Sheet
            '~~> Save Worksheet file to the following location
            Dim currentdate As String = String.Format("{0:ddMMyy-HHmm}", DateTime.Now)
 
            ' ------- Save as Report Location from Text file  ------
            '******  Chanage above hardcode to Save excel Report to D drive in Report folder ********           
            xlWorkSheet.SaveAs("D:\ReportPast03" & "\ParagDailyReportPast03" & currentdate & ".xlsx")
 
            xlWorkBook.Close()
            xlApp.Quit()
            'objExcel.Quit()
            System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp)
            xlApp = Nothing
 
            ProgBarReport.Value = ProgBarReport.Maximum
 
            '  ProgBarReport.Value = 0
            LabelReport.Text = "Report generated Scucessfully"
 
        Catch ex As Exception
 
            MsgBox(ex.ToString())
 
        End Try
    End Sub


What I have tried:

I have tried above code and takes more than 15 min to generate a report
Posted
Updated 18-Aug-22 10:54am
Comments
0x01AA 18-Aug-22 14:53pm    
How is about to write the data first into a csv file and load it by Excel Interop from there?
Member 11043816 18-Aug-22 15:01pm    
Do you have some code for the same
0x01AA 18-Aug-22 16:00pm    
See solution 1.
Member 11043816 18-Aug-22 17:05pm    
Thanks for your Support..I will check and revert back to you on same.Can you please share a code on "database by an ADO connection. Makes it most probably more powerful. For more details, have a look to workbooks.OpenDatabase(...)"
Dave Kreskowiak 18-Aug-22 15:47pm    
Office Interop is notoriously slow. You would be much better off using OpenXML instead.

1 solution

How to load data to an Excel file by Interop from a Tab delimited Textfile.
This works for me:
private void buttonLoadCsv_Click(object sender, EventArgs e)
{
    // The tab delimited text file
    string csvFileName = @"C:\Temp\cp.excel\TexfileImport\report.txt";

    // Excel Application
    Microsoft.Office.Interop.Excel.Application _excel = new _Excel.Application();

    // The workbooks
    Workbooks workbooks = _excel.Workbooks;

    // No User Intervention Dialogues
    _excel.DisplayAlerts = false;

    // Open the textfile
    workbooks.OpenText(csvFileName,
                       DataType: Microsoft.Office.Interop.Excel.XlTextParsingType.xlDelimited,
                       TextQualifier: Microsoft.Office.Interop.Excel.XlTextQualifier.xlTextQualifierNone,
                       ConsecutiveDelimiter: true,
                       Semicolon: true);

    // SaveAs the workbook as xlsx excel file
    workbooks[1].SaveAs(csvFileName + ".xlsx", XlFileFormat.xlOpenXMLWorkbook);
}

Remark: Another solution is to prepare the report data in your/a database and load the report from the database by an ADO connection. Makes it most probably more powerful. For more details, have a look to workbooks.OpenDatabase(...)
 
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