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How to import Excel worksheet to DataGridView keeping cell colors

Posted on 2008-10-16
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Last Modified: 2008-10-16
Hi there

I am developing a small app to help manage huge Excel worksheets.
These worksheets have multiple cells colored within.
I am loading the worksheets to a DataGridView as show below but I want to keep the cell colors.
Any ideias on how to achieve this? Would help if I didn't have to cycle all cells as the worksheets have near to on hundred columns and close to four hundred rows.

Regards
Dim connectionStringTemplate As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 12.0;HDR=Yes;IMEX=1"""
 
                Dim connectionString As String = String.Format(connectionStringTemplate, sFileName)
                Dim sqlSelect As String = "SELECT * FROM [Sheet1$];"
                ' Load the Excel worksheet into a DataTable
                Dim workbook As DataSet = New DataSet()
                Dim excelAdapter As System.Data.Common.DataAdapter = New System.Data.OleDb.OleDbDataAdapter(sqlSelect, connectionString)
                Try
                    excelAdapter.Fill(workbook)
                    Dim worksheet As DataTable = workbook.Tables(0)
                    dgv.DataSource = worksheet
 
                Catch
'MANAGE EXCEPTION
 
                End Try

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Question by:vercesi
  • 3
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6 Comments
 
LVL 47

Expert Comment

by:Wayne Taylor (webtubbs)
ID: 22729867
vercesi,

It's impossible to determine the cell color through ADO.Net, so unfortunately the only way to color the DatGridView cells is to iterate through each cell in the imported range. Something like the below code snippet. Yes, it could take a while, but that is the only option you have for importing the cell colors.

Wayne
        Dim xlApp As Object = CreateObject("Excel.Application")
        Dim xlWB As Object = xlApp.Workbooks.Open("C:\Path\File.xls")
        Dim xlWS As Object = xlWB.Worksheets("Sheet1")
 
        DataGridView1.RowCount = xlWS.UsedRange.Rows.Count
        DataGridView1.ColumnCount = xlWS.UsedRange.Columns.Count
 
        Try
            For r As Integer = 1 To xlWS.UsedRange.Rows.Count
                For c As Integer = 1 To xlWS.UsedRange.Columns.Count
                    With DataGridView1(c - 1, r - 1)
                        .Value = xlWS.UsedRange.Cells(r, c).Value
                        .Style.BackColor = ColorTranslator.FromOle(xlWS.Usedrange.Cells(r, c).Interior.Color)
                    End With
                Next
            Next
 
        Catch ex As Exception
            'empty catch
        End Try
 
        xlWS = Nothing
        xlWB.Close(False)
        xlWB = Nothing
        xlApp.Quit()
        xlApp = Nothing

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Author Comment

by:vercesi
ID: 22729908
Just tried your solution but got an error:

"Old format or invalid type format"

Do I need to add some expecific reference?
0
 
LVL 47

Expert Comment

by:Wayne Taylor (webtubbs)
ID: 22730059
Hmm. I just noticed in your code you are using XL2007. If you add a reference to "Microsoft Excel 12.0 Object Library", the below should work.

If not, it'd help to know which line caused the error.
        Dim xlApp As New Microsoft.Office.Interop.Excel.Application
        Dim xlWB As Microsoft.Office.Interop.Excel.Workbook = xlApp.Workbooks.Open("C:\Path\File.xls")
        Dim xlWS As Microsoft.Office.Interop.Excel.Worksheet = xlWB.Worksheets("Sheet1")
 
        DataGridView1.RowCount = xlWS.UsedRange.Rows.Count
        DataGridView1.ColumnCount = xlWS.UsedRange.Columns.Count
 
        Try
            For r As Integer = 1 To xlWS.UsedRange.Rows.Count
                For c As Integer = 1 To xlWS.UsedRange.Columns.Count
                    With DataGridView1(c - 1, r - 1)
                        .Value = xlWS.UsedRange.Cells(r, c).Value
                        .Style.BackColor = ColorTranslator.FromOle(xlWS.Usedrange.Cells(r, c).Interior.Color)
                    End With
                Next
            Next
 
        Catch ex As Exception
            'empty catch
        End Try
 
        xlWS = Nothing
        xlWB.Close(False)
        xlWB = Nothing
        xlApp.Quit()
        xlApp = Nothing

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LVL 47

Accepted Solution

by:
Wayne Taylor (webtubbs) earned 125 total points
ID: 22730105
Here it is again, tidied up a bit, and using the first row as the HeaderText for the columns.
        Dim xlApp As New Microsoft.Office.Interop.Excel.Application
        Dim xlWB As Microsoft.Office.Interop.Excel.Workbook = xlApp.Workbooks.Open("C:\Path\File.xls")
        Dim xlWS As Microsoft.Office.Interop.Excel.Worksheet = xlWB.Worksheets("Sheet1")
 
        DataGridView1.RowCount = xlWS.UsedRange.Rows.Count - 1
        DataGridView1.ColumnCount = xlWS.UsedRange.Columns.Count
 
        Try
            For c As Integer = 1 To xlWS.UsedRange.Columns.Count
                DataGridView1.Columns(c - 1).HeaderText = xlWS.UsedRange.Cells(1, c).Value
            Next
            For r As Integer = 2 To xlWS.UsedRange.Rows.Count
                For c As Integer = 1 To xlWS.UsedRange.Columns.Count
                    With DataGridView1(c - 1, r - 2)
                        .Value = xlWS.UsedRange.Cells(r, c).Value
                        .Style.BackColor = ColorTranslator.FromOle(xlWS.UsedRange.Cells(r, c).Interior.Color)
                    End With
                Next
            Next
        Catch ex As Exception
            MsgBox(ex.Message)
        Finally
            xlWS = Nothing
            xlWB.Close(False)
            xlWB = Nothing
            xlApp.Quit()
            xlApp = Nothing
        End Try

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Author Comment

by:vercesi
ID: 22730420
Still got the same error.

I have googled the error and found this:
"In some deployment scenarios, you must know the locale identifier (LCID) for a language in order to install the correct MUI Pack."

I will try the solution provided (installing MUI Pack) and get back on this.
0
 
LVL 1

Author Comment

by:vercesi
ID: 22731029
I've got it working using:

System.Threading.Thread.CurrentThread.CurrentCulture = System.Globalization.CultureInfo.CreateSpecificCulture("en-US")

Thanks you
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