I have a datagridview in vb.net that is filled up from the database. I've researched and I found out that there is no built in support to print directly from datagridview. I don't want to use crystal report because I'm not familiar with it.
I'm planning to export it to excel to enable me to generate report from the datagridview.
Can you provide me ways to do this?
This question is related to
vb.net
excel
datagridview
printing
another easy way and more flexible , after loading data into Datagrid
Private Sub Button_Export_Click(sender As Object, e As EventArgs) Handles Button_Export.Click
Dim file As System.IO.StreamWriter
file = My.Computer.FileSystem.OpenTextFileWriter("c:\1\Myfile.csv", True)
If DataGridView1.Rows.Count = 0 Then GoTo loopend
' collect the header's names
Dim Headerline As String
For k = 0 To DataGridView1.Columns.Count - 1
If k = DataGridView1.Columns.Count - 1 Then ' last column dont put , separate
Headerline = Headerline & DataGridView1.Columns(k).HeaderText
Else
Headerline = Headerline & DataGridView1.Columns(k).HeaderText & ","
End If
Next
file.WriteLine(Headerline) ' this will write header names at the first line
' collect the data
For i = 0 To DataGridView1.Rows.Count - 1
Dim DataRow As String
For k = 0 To DataGridView1.Columns.Count - 1
If k = DataGridView1.Columns.Count - 1 Then
DataRow = DataRow & DataGridView1.Rows(i).Cells(k).Value ' last column dont put , separate
End If
DataRow = DataRow & DataGridView1.Rows(i).Cells(k).Value & ","
Next
file.WriteLine(DataRow)
DataRow = ""
Next
loopend:
file.Close()
End Sub
Excel Method
This method is different than many you will see. Others use a loop to write each cell and write the cells with text data type.
This method creates an object array from a DataTable or DataGridView and then writes the array to Excel. This means I can write to Excel without a loop and retain data types.
I extracted this from my library and I think I changed it enough to work with this code only, but more minor tweaking might be necessary. If you get errors just let me know and I'll correct them for you. Normally, I create an instance of my class and call these methods. If you would like to use my library then use this link to download it and if you need help just let me know.
https://zomp.co/Files.aspx?ID=zExcel
After copying the code to your solution you will use it like this.
In your button code add this and change the names to your controls.
WriteDataGrid("Sheet1", grid)
To open your file after exporting use this line
System.Diagnostics.Process.Start("The location and filename of your file")
In the WriteArray method you'll want to change the line that saves the workbook to where you want to save it. Probably makes sense to add this as a parameter.
wb.SaveAs("C:\MyWorkbook.xlsx")
Public Function WriteArray(Sheet As String, ByRef ObjectArray As Object(,)) As String
Try
Dim xl As Excel.Application = New Excel.Application
Dim wb As Excel.Workbook = xl.Workbooks.Add()
Dim ws As Excel.Worksheet = wb.Worksheets.Add()
ws.Name = Sheet
Dim range As Excel.Range = ws.Range("A1").Resize(ObjectArray.GetLength(0), ObjectArray.GetLength(1))
range.Value = ObjectArray
range = ws.Range("A1").Resize(1, ObjectArray.GetLength(1) - 1)
range.Interior.Color = RGB(0, 70, 132) 'Con-way Blue
range.Font.Color = RGB(Drawing.Color.White.R, Drawing.Color.White.G, Drawing.Color.White.B)
range.Font.Bold = True
range.WrapText = True
range.HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter
range.VerticalAlignment = Excel.XlVAlign.xlVAlignCenter
range.Application.ActiveWindow.SplitColumn = 0
range.Application.ActiveWindow.SplitRow = 1
range.Application.ActiveWindow.FreezePanes = True
wb.SaveAs("C:\MyWorkbook.xlsx")
wb.CLose()
xl.Quit()
xl = Nothing
wb = Nothing
ws = Nothing
range = Nothing
ReleaseComObject(xl)
ReleaseComObject(wb)
ReleaseComObject(ws)
ReleaseComObject(range)
Return ""
Catch ex As Exception
Return "WriteArray()" & Environment.NewLine & Environment.NewLine & ex.Message
End Try
End Function
Public Function WriteDataGrid(SheetName As String, ByRef dt As DataGridView) As String
Try
Dim l(dt.Rows.Count + 1, dt.Columns.Count) As Object
For c As Integer = 0 To dt.Columns.Count - 1
l(0, c) = dt.Columns(c).HeaderText
Next
For r As Integer = 1 To dt.Rows.Count
For c As Integer = 0 To dt.Columns.Count - 1
l(r, c) = dt.Rows(r - 1).Cells(c)
Next
Next
Dim errors As String = WriteArray(SheetName, l)
If errors <> "" Then
Return errors
End If
Return ""
Catch ex As Exception
Return "WriteDataGrid()" & Environment.NewLine & Environment.NewLine & ex.Message
End Try
End Function
Public Function WriteDataTable(SheetName As String, ByRef dt As DataTable) As String
Try
Dim l(dt.Rows.Count + 1, dt.Columns.Count) As Object
For c As Integer = 0 To dt.Columns.Count - 1
l(0, c) = dt.Columns(c).ColumnName
Next
For r As Integer = 1 To dt.Rows.Count
For c As Integer = 0 To dt.Columns.Count - 1
l(r, c) = dt.Rows(r - 1).Item(c)
Next
Next
Dim errors As String = WriteArray(SheetName, l)
If errors <> "" Then
Return errors
End If
Return ""
Catch ex As Exception
Return "WriteDataTable()" & Environment.NewLine & Environment.NewLine & ex.Message
End Try
End Function
I actually don't use this method in my Database program because it's a slow method when you have a lot of rows/columns. I instead create a CSV from the DataGridView. Writing to Excel with Excel Automation is only useful if you need to format the data and cells otherwise you should use CSV. You can use the code after the image for CSV export.
CSV Method
Private Sub DataGridToCSV(ByRef dt As DataGridView, Qualifier As String)
Dim TempDirectory As String = "A temp Directory"
System.IO.Directory.CreateDirectory(TempDirectory)
Dim oWrite As System.IO.StreamWriter
Dim file As String = System.IO.Path.GetRandomFileName & ".csv"
oWrite = IO.File.CreateText(TempDirectory & "\" & file)
Dim CSV As StringBuilder = New StringBuilder()
Dim i As Integer = 1
Dim CSVHeader As StringBuilder = New StringBuilder()
For Each c As DataGridViewColumn In dt.Columns
If i = 1 Then
CSVHeader.Append(Qualifier & c.HeaderText.ToString() & Qualifier)
Else
CSVHeader.Append("," & Qualifier & c.HeaderText.ToString() & Qualifier)
End If
i += 1
Next
'CSV.AppendLine(CSVHeader.ToString())
oWrite.WriteLine(CSVHeader.ToString())
oWrite.Flush()
For r As Integer = 0 To dt.Rows.Count - 1
Dim CSVLine As StringBuilder = New StringBuilder()
Dim s As String = ""
For c As Integer = 0 To dt.Columns.Count - 1
If c = 0 Then
'CSVLine.Append(Qualifier & gridResults.Rows(r).Cells(c).Value.ToString() & Qualifier)
s = s & Qualifier & gridResults.Rows(r).Cells(c).Value.ToString() & Qualifier
Else
'CSVLine.Append("," & Qualifier & gridResults.Rows(r).Cells(c).Value.ToString() & Qualifier)
s = s & "," & Qualifier & gridResults.Rows(r).Cells(c).Value.ToString() & Qualifier
End If
Next
oWrite.WriteLine(s)
oWrite.Flush()
'CSV.AppendLine(CSVLine.ToString())
'CSVLine.Clear()
Next
'oWrite.Write(CSV.ToString())
oWrite.Close()
oWrite = Nothing
System.Diagnostics.Process.Start(TempDirectory & "\" & file)
GC.Collect()
End Sub
Code below creates Excel File and saves it in D: drive It uses Microsoft office 2007
FIRST ADD REFERRANCE (Microsoft office 12.0 object library ) to your project
Then Add code given bellow to the Export button click event-
Private Sub Export_Button_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles VIEW_Button.Click
Dim xlApp As Microsoft.Office.Interop.Excel.Application
Dim xlWorkBook As Microsoft.Office.Interop.Excel.Workbook
Dim xlWorkSheet As Microsoft.Office.Interop.Excel.Worksheet
Dim misValue As Object = System.Reflection.Missing.Value
Dim i As Integer
Dim j As Integer
xlApp = New Microsoft.Office.Interop.Excel.ApplicationClass
xlWorkBook = xlApp.Workbooks.Add(misValue)
xlWorkSheet = xlWorkBook.Sheets("sheet1")
For i = 0 To DataGridView1.RowCount - 2
For j = 0 To DataGridView1.ColumnCount - 1
For k As Integer = 1 To DataGridView1.Columns.Count
xlWorkSheet.Cells(1, k) = DataGridView1.Columns(k - 1).HeaderText
xlWorkSheet.Cells(i + 2, j + 1) = DataGridView1(j, i).Value.ToString()
Next
Next
Next
xlWorkSheet.SaveAs("D:\vbexcel.xlsx")
xlWorkBook.Close()
xlApp.Quit()
releaseObject(xlApp)
releaseObject(xlWorkBook)
releaseObject(xlWorkSheet)
MsgBox("You can find the file D:\vbexcel.xlsx")
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
Regarding your need to 'print directly from datagridview', check out this article on CodeProject:
There are a number of similar articles but I've had luck with the one I linked.
The following code works fine for me :)
Protected Sub ExportToExcel(sender As Object, e As EventArgs) Handles ExportExcel.Click
Try
Response.Clear()
Response.Buffer = True
Response.AddHeader("content-disposition", "attachment;filename=ExportEthias.xls")
Response.Charset = ""
Response.ContentType = "application/vnd.ms-excel"
Using sw As New StringWriter()
Dim hw As New HtmlTextWriter(sw)
GvActifs.RenderControl(hw)
'Le format de base est le texte pour éviter les problèmes d'arrondis des nombres
Dim style As String = "<style> .textmode { } </style>"
Response.Write(Style)
Response.Output.Write(sw.ToString())
Response.Flush()
Response.End()
End Using
Catch ex As Exception
lblMessage.Text = "Erreur export Excel : " & ex.Message
End Try
End Sub
Public Overrides Sub VerifyRenderingInServerForm(control As Control)
' Verifies that the control is rendered
End Sub
Hopes this help you.
In design mode: Set DataGridView1 ClipboardCopyMode properties to EnableAlwaysIncludeHeaderText
or on the program code
DataGridView1.ClipboardCopyMode = DataGridViewClipboardCopyMode.EnableAlwaysIncludeHeaderText
In the run time select all cells content (Ctrl+A) and copy (Ctrl+C) and paste to the Excel Program. Let the Excel do the rest
Sorry for the inconvenient, I have been searching the method to print data directly from the datagridvew (create report from vb.net VB2012) and have not found the satisfaction result. Above code just my though, wondering if my applications user can rely on above simple step it will be nice and I could go ahead to next step on my program progress.
Dim rowNo1 As Short Dim numrow As Short Dim colNo1 As Short Dim colNo2 As Short
rowNo1 = 1
colNo1 = 1
colNo2 = 1
numrow = 1
ObjEXCEL = CType(CreateObject("Excel.Application"), Microsoft.Office.Interop.Excel.Application)
objEXCELBook = CType(ObjEXCEL.Workbooks.Add, Microsoft.Office.Interop.Excel.Workbook)
objEXCELSheet = CType(objEXCELBook.Worksheets(1), Microsoft.Office.Interop.Excel.Worksheet)
ObjEXCEL.Visible = True
For numCounter = 0 To grdName.Columns.Count - 1
' MsgBox(grdName.Columns(numCounter).HeaderText())
If grdName.Columns(numCounter).Width > 0 Then
ObjEXCEL.Cells(1, numCounter + 1) = grdName.Columns(numCounter).HeaderText()
End If
' ObjEXCEL.Cells(1, numCounter + 1) = grdName.Columns.GetFirstColumn(DataGridViewElementStates.Displayed)
Next numCounter
ObjEXCEL.Range("A:A").ColumnWidth = 10
ObjEXCEL.Range("B:B").ColumnWidth = 25
ObjEXCEL.Range("C:C").ColumnWidth = 20
ObjEXCEL.Range("D:D").ColumnWidth = 20
ObjEXCEL.Range("E:E").ColumnWidth = 20
ObjEXCEL.Range("F:F").ColumnWidth = 25
For rowNo1 = 0 To grdName.RowCount - 1
For colNo1 = 0 To grdName.ColumnCount - 1
If grdName.Columns(colNo1).Width > 0 Then
If Trim(grdName.Item(colNo1, rowNo1).Value) <> "" Then
'If IsDate(grdName.Item(colNo1, rowNo1).Value) = True Then
' ObjEXCEL.Cells(numrow + 1, colNo2) = Format(CDate(grdName.Item(colNo1, rowNo1).Value), "dd/MMM/yyyy")
'Else
ObjEXCEL.Cells(numrow + 1, colNo2) = grdName.Item(colNo1, rowNo1).Value
'End If
End If
If colNo2 >= grdName.ColumnCount Then
colNo2 = 1
Else
colNo2 = colNo2 + 1
End If
End If
Next colNo1
numrow = numrow + 1
Next rowNo1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
DATAGRIDVIEW_TO_EXCEL((DataGridView1)) ' PARAMETER: YOUR DATAGRIDVIEW
End Sub
Private Sub DATAGRIDVIEW_TO_EXCEL(ByVal DGV As DataGridView)
Try
Dim DTB = New DataTable, RWS As Integer, CLS As Integer
For CLS = 0 To DGV.ColumnCount - 1 ' COLUMNS OF DTB
DTB.Columns.Add(DGV.Columns(CLS).Name.ToString)
Next
Dim DRW As DataRow
For RWS = 0 To DGV.Rows.Count - 1 ' FILL DTB WITH DATAGRIDVIEW
DRW = DTB.NewRow
For CLS = 0 To DGV.ColumnCount - 1
Try
DRW(DTB.Columns(CLS).ColumnName.ToString) = DGV.Rows(RWS).Cells(CLS).Value.ToString
Catch ex As Exception
End Try
Next
DTB.Rows.Add(DRW)
Next
DTB.AcceptChanges()
Dim DST As New DataSet
DST.Tables.Add(DTB)
Dim FLE As String = "" ' PATH AND FILE NAME WHERE THE XML WIL BE CREATED (EXEMPLE: C:\REPS\XML.xml)
DTB.WriteXml(FLE)
Dim EXL As String = "" ' PATH OF/ EXCEL.EXE IN YOUR MICROSOFT OFFICE
Shell(Chr(34) & EXL & Chr(34) & " " & Chr(34) & FLE & Chr(34), vbNormalFocus) ' OPEN XML WITH EXCEL
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End Sub
A simple way of generating a printable report from a Datagridview is to place the datagridview on a Panel object. It is possible to draw a bitmap of the panel.
Here's how I do it.
'create the bitmap with the dimentions of the Panel Dim bmp As New Bitmap(Panel1.Width, Panel1.Height)
'draw the Panel to the bitmap "bmp" Panel1.DrawToBitmap(bmp, Panel1.ClientRectangle)
I create a multi page tiff by "breaking my datagridview items into pages. this is how i detect the start of a new page:
'i add the rows to my datagrid one at a time and then check if the scrollbar is active. 'if the scrollbar is active i save the row to a variable and then i remove it from the 'datagridview and roll back my counter integer by one(thus the next run will include this 'row.
Private Function VScrollBarVisible() As Boolean
Dim ctrl As New Control
For Each ctrl In DataGridView_Results.Controls
If ctrl.GetType() Is GetType(VScrollBar) Then
If ctrl.Visible = True Then
Return True
Else
Return False
End If
End If
Next
Return Nothing
End Function
I hope this helps
Source: Stackoverflow.com