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Reading and writing an Excel file using VB.NET

, 20 Mar 2007
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This code helps the user to interact with an Excel file using the OleDBDataProvider in VB.NET.

Screenshot - ExcelSheet.jpg

Introduction

This articles helps user to Insert, Update, Delete, and Select data in Excel files using the OLEDBDataProvider in VB.NET.

Here is the connection string to connect with Excel using OleDBDataProvider:

Private Const connstring As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
        "Data Source=C:\Test.xls;Extended Properties=""Excel 8.0;HDR=YES;"""

Here is the code on the button click event to select and insert data in an Excel file:

Private Sub Button1_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles Button1.Click
    Dim pram As OleDbParameter
    Dim dr As DataRow
    Dim olecon As OleDbConnection
    Dim olecomm As OleDbCommand
    Dim olecomm1 As OleDbCommand
    Dim oleadpt As OleDbDataAdapter
    Dim ds As DataSet
    Try
        olecon = New OleDbConnection
        olecon.ConnectionString = connstring
        olecomm = New OleDbCommand
        olecomm.CommandText = _
           "Select FirstName, LastName, Age, Phone from [Sheet1$]"
        olecomm.Connection = olecon
        olecomm1 = New OleDbCommand
        olecomm1.CommandText = "Insert into [Sheet1$] " & _
            "(FirstName, LastName, Age, Phone) values " & _
            "(@FName, @LName, @Age, @Phone)"
        olecomm1.Connection = olecon
        pram = olecomm1.Parameters.Add("@FName", OleDbType.VarChar)
        pram.SourceColumn = "FirstName"
        pram = olecomm1.Parameters.Add("@LName", OleDbType.VarChar)
        pram.SourceColumn = "LastName"
        pram = olecomm1.Parameters.Add("@Age", OleDbType.VarChar)
        pram.SourceColumn = "Age"
        pram = olecomm1.Parameters.Add("@Phone", OleDbType.VarChar)
        pram.SourceColumn = "Phone"
        oleadpt = New OleDbDataAdapter(olecomm)
        ds = New DataSet
        olecon.Open()
        oleadpt.Fill(ds, "Sheet1")
        If IsNothing(ds) = False Then
            dr = ds.Tables(0).NewRow
            dr("FirstName") = "Raman"
            dr("LastName") = "Tayal"
            dr("Age") = 24
            dr("Phone") = 98989898
            ds.Tables(0).Rows.Add(dr)
            oleadpt = New OleDbDataAdapter
            oleadpt.InsertCommand = olecomm1
            Dim i As Integer = oleadpt.Update(ds, "Sheet1")
            MessageBox.Show(i & " row affected")
        End If
    Catch ex As Exception
        MessageBox.Show(ex.Message)
    Finally
        olecon.Close()
        olecon = Nothing
        olecomm = Nothing
        oleadpt = Nothing
        ds = Nothing
        dr = Nothing
        pram = Nothing
    End Try
End Sub

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Raman Tayal
Software Developer (Senior)
India India
No Biography provided

Comments and Discussions

 
QuestionThanks for detailed PinmemberMike Earl17-Jan-14 4:08 
Questionwrite data from one source excel file to destination excel file Pinmembersanjivkp774-Dec-13 4:51 
GeneralThanks a Lot brother Pinmemberravisankarvattikuti14-Mar-10 5:47 
GeneralRe: Thanks a Lot brother PinmemberRaman Tayal15-Mar-10 6:54 
Generalthanks Pinmemberbhavin123014-Sep-09 18:13 
GeneralPlease clarify my question( urgent!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ) Pinmembercatchthedream31-Aug-09 1:43 
QuestionPK??? PinmemberGlobalUni22-Jul-09 22:10 
AnswerRe: PK??? PinmemberRaman Tayal23-Jul-09 7:18 
Questionmaking dictionary Pinmemberthaileang25-Jun-09 8:31 
QuestionExcel Upload PinmemberWendellB4-May-09 8:47 
AnswerRe: Excel Upload Pinmembergg42379-Nov-09 23:19 
GeneralUpdate a shared excell file [modified] Pinmemberfacu20yo19-Apr-09 3:57 
Questionneed help...urgent! PinmemberMember 430050816-Mar-09 18:11 
AnswerRe: need help...urgent! PinmemberRaman Tayal17-Mar-09 20:28 
GeneralRe: need help...urgent! PinmemberMember 430050820-Mar-09 19:13 
GeneralRe: need help...urgent! Pinmembergg423710-Aug-09 13:07 
Hi,
hope it's not to late with answer. Since i'm not familiar with VB (I'm into C#) i can try to explain it in pseudo code. Let's say you want to go from A1 to P1
 
string cellname="A1";
do
{
read cell with name cellname;
do calculations;
increase value of char cellname[0] by 1 so you get B1 from A1;
}
while (cellname equals "P1")
 
This way you change name of cell you want to read. Another way is to use GemBox Excel component for .NET. I use this component and it is very useful and very easy to use. Here is a list of reasons why it's better to use this component then Excel Automation (but it can also go for OLEDB).
Generalhelp Pinmemberpjacquez6816-Feb-09 7:06 
GeneralRe: help PinmemberRaman Tayal16-Feb-09 20:50 
Generali need your help bro, Pinmemberpjacquez6816-Feb-09 6:56 
Generaldelete Pinmemberpjacquez6816-Feb-09 4:15 
GeneralFrom Jacquez Pinmemberpjacquez6816-Feb-09 3:18 
GeneralGreat more code being posted THAT DOESN'T WORK OUT OF THE BOX. PinmemberMember 389560127-Jan-09 14:00 
GeneralRe: Great more code being posted THAT DOESN'T WORK OUT OF THE BOX. PinmemberRaman Tayal28-Jan-09 5:04 
GeneralRe: Great more code being posted THAT DOESN'T WORK OUT OF THE BOX. PinmemberMember 389560128-Jan-09 5:28 
GeneralRe: Great more code being posted THAT DOESN'T WORK OUT OF THE BOX. PinmemberRaman Tayal28-Jan-09 18:14 

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