Import Data From Excel-Sheet Via OleDb In VB.Net - How To Get A Columns Data As String?

Oct 25, 2007

Hello,

i want to import data from an excel sheet into a database. While reading from the excel sheet OleDb automatically guesses the Datatype of each column. My Problem is the first A Column which contains ~240 Lines. 210 Lines are Numbers, the latter 30 do contain strings. When i use this code:







Code BlockDim sConn As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & conf_path_current & file_to_import & ";Extended Properties=""Excel 8.0;HDR=NO"""
Dim oConn As New OleDb.OleDbConnection(sConn)
Dim cmd1 As New System.Data.OleDb.OleDbCommand("Select * From [Table$]", oConn)
Dim rdr As OleDb.OleDbDataReader = cmd1.ExecuteReader
Do While rdr.Read()
Console.WriteLine(rdr.Item(0)) 'or rdr(0).ToString
Next




it will continue to read the stuff till the String-Lines are coming.
when using Item(0), it just crashes for trying to convert a DBNull to a String, when using rdr(0).ToString() it just gives me no value.

So my question is how to tell OleDB that i want that column to be completly read as String/Varchar?

Thanks for Reading

- Pierre from Berlin


[seems i got redirected into the wrong forum, please move into the correct one]

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Operation stopped...

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- Pre-execute (Stopped)

- Executing (Stopped)

- Copying to [EJTest].[dbo].[Journal] (Stopped)

- Post-execute (Stopped)

- Cleanup (Stopped)

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