DateTime format mismatch on importing from Excel Sheet

Question

I\'m importing data from an Excel sheet on to a DataTable using the following code:

OleDbConnection con = new OleDbConnection(\"Provider=Microso         


        

Answer 1

You could use the British Culture info to parse the date in British Format dd/MM/YYYY

CultureInfo culture = new CultureInfo("en-GB");
DateTime date = DateTime.Parse("27/12/2009", culture);

where "27/12/2009" is your date field

Answer 2

I also faced the same Issue. The Date column in the Excel sheet is dd/MM/yyyy. But as per my system settings the data format is MM/dd/yyyy. Therefore if the date is 31/07/2013 for example , the Date field displayed as empty string.

Using IMEX1 along with "Microsoft.ACE.OLEDB.12.0" Driver Solved the Problem.

"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + FilePath + ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1;'"

But "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + FilePath + "; Extended Properties=Excel 8.0;IMEX=1" doesn't work.

Answer 3

When linking Excel spreadsheets in MS Access, a problem arises when a column has mixed data types. For example, if the first row in the column is "Text" and the remaining are Numeric, the Numeric fields will be formatted as Text and #Error out. Likewise with Dates and non-Dates mixed in the same column.

There are some nice attempts at answers up there, but here is the simple solution to read these Mixed data types without a data type mismatch error:

Try adding "IMEX=1" to your MS Access SQL, such as:

SELECT Type, Width, Weight

FROM [Excel 8.0;IMEX=1;DATABASE=C:\TEMP\MySpreadsheet.xls].MyExcelTable

Thanks, Brian Jasmer

Answer 4

How many rows do you have, and are all the cells in the date column valid dates? Sometimes the OleDB routines will incorrectly identify a column as text if there is some inconsistency in the cells in the first 8 rows. (8 is the default number of rows that is read to determine data types)

Answer 5

You can use this function to format whatever date format you received to the format you need.

Here is the code:

Public Shared Function ConvertToDate(ByVal dateString As String, ByRef result As DateTime) As Boolean
Try

'Here is the date format you desire to use
Dim supportedFormats() As String = New String() {”dd/MM/yyyy”}

'Now it will be converted to what the machine supports
result = DateTime.ParseExact(dateString, supportedFormats,System.Globalization.CultureInfo.CurrentCulture, System.Globalization.DateTimeStyles.None)

Return True
Catch ex As Exception
Return False
End Try
End Function

Answer 6

How about filling the dataset programmatically instead of via a data adapter?

OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + fileName + ";Extended Properties=Excel 8.0");

Dim _myDataSet As New DataSet
                Dim con As New OleDb.OleDbConnection
                con.Open()
                Dim cmd As New OleDb.OleDbCommand(" SELECT * FROM [" + "Sheet1" + "$]", con)
                Using dr = cmd.ExecuteReader()
                    While dr.Read
                        Dim row = _myDataSet.Tables(0).NewRow()
                        With dr.Item("excel date column").ToString
                            Dim dt As New Date(CInt(.Substring(6)), CInt(.Substring(3, 2)), CInt(.Substring(0, 2)))
                            row.Item("dataset datecolumn") = dt
                        End With

                        \*'populate other columns here' *\
                       _myDataSet.Tables(0).Rows.Add(row)
                    End While


                End Using