Vb Read Csv and Write Output Back to File in Vs
Read and Write CSV file in Vb.Net: Today's article for vb .net write csv file , nosotros are using the FileIo namespace for writing CSV file and OLEDB ADO.NET connectivity to read the CSV file.
vb .cyberspace write csv file:
Comma-separated values(CSV) is not a single, well-defined format it sometimes also chosen character-separated values. Comma separated values text files (.csv), in which the comma character (,) typically separates each field of text.
In a comma-separated values (CSV) file the information items are separated using commas every bit a delimiter, while in a tab-separated values (TSV) file, the data items are separated using tabs as a delimiter. Column headers are sometimes included every bit the first line, and each subsequent line is a row of data.
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In our example nosotros are writing the Customer information using the StreamWriter with separates each field of text past comma(,). Read that file using the OleDbConnection.
Some time it will heppends that some special characters added in to the Commencement column of header, it will look similar "" it'south called BOM-ed UTF-8 means we demand to practise Unicode Character settings in the reading code of the file. For this reason nosotros are using the "Extended Backdrop='text;HDR=Yeah;FMT=Delimited;CharacterSet=65001;'".
Ok!! Let's move on the simple instance of Read and Write CSV file in vb.net for Client informations.
Following are the steps to Read and Write CSV file in vb.internet
We are creating 2 forms for this instance offset for Writing and another for reading csv file.
Writing CSV File – Form proper name as "Create"
Add together CONTROLS IN FORMS
All the controls with the specified Id's.
ADD CODE-BEHIND SOURCE
Imports Microsoft.VisualBasic.FileIO Public Class Create Individual Sub Create_Load(ByVal sender Equally System.Object, ByVal east As Organisation.EventArgs) Handles MyBase.Load Finish Sub Private Sub CreateCSVfile(ByVal _strCustomerCSVPath Every bit String, ByVal _CustomerID Every bit String, ByVal _FirstName Equally Cord, ByVal _LastName As Cord, ByVal _Phone As String, ByVal _Email As Cord, ByVal _Msg Every bit String) Attempt Dim stLine As String = "" Dim objWriter Equally IO.StreamWriter = IO.File.AppendText(_strCustomerCSVPath) If IO.File.Exists(_strCustomerCSVPath) Then objWriter.Write(_CustomerID & ",") objWriter.Write(_FirstName & ",") objWriter.Write(_LastName & ",") objWriter.Write(_Email & ",") 'If value contains comma in the value and so you have to perform this opertions Dim suspend = If(_Msg.Contains(","), String.Format("""{0}""", _Msg), _Msg) stLine = String.Format("{0}{1},", stLine, suspend) objWriter.Write(stLine) objWriter.Write(_Phone) objWriter.Write(Environment.NewLine) End If objWriter.Close() ClearTextbox() Catch ex Equally Exception End Try Finish Sub Private Sub BtnSubmit_Click(ByVal sender As System.Object, ByVal east As Organisation.EventArgs) Handles BtnSubmit.Click CreateCSVfile(Application.StartupPath & "\" & "CustomerRecords.csv", txtCustomerId.Text.ToString(), txtFirstName.Text.ToString(), txtLastName.Text.ToString(), txtPhoneNo.Text.ToString(), txtEmail.Text.ToString(), txtMessage.Text.ToString()) Terminate Sub Private Sub ClearTextbox() txtCustomerId.Text = "" txtFirstName.Text = "" txtLastName.Text = "" txtPhoneNo.Text = "" txtEmail.Text = "" txtMessage.Text = "" Cease Sub Private Sub btnView_Click(ByVal sender Every bit System.Object, ByVal due east As Arrangement.EventArgs) Handles btnView.Click Read.Show() End Sub End Form Read CSV File – Class name as "Read"
Add CONTROLS IN FORMS – vb .net write csv file
All the controls with the specified Id's.
Add CODE-BEHIND SOURCE
Imports Organisation.IO Imports System.String Imports System.Internet Imports System.Data.OleDb Public Class Read Public CustomerInfo = New DataTable("CustomerInfo") Private Sub Read_Load(ByVal sender Equally System.Object, ByVal e As System.EventArgs) Handles MyBase.Load CustomerInfo = GetCsvData(Application.StartupPath, "CustomerRecords.csv") Bind_Grid_CustomerInfo(CustomerInfo) Stop Sub Public Sub Bind_Grid_CustomerInfo(ByVal DT As DataTable) Attempt DGCustomerInfo.DataSource = DT DGCustomerInfo.Refresh() Catch ex Every bit Exception End Attempt End Sub Public Office GetCsvData(ByVal strFolderPath Every bit Cord, ByVal strFileName As Cord) As DataTable Try 'CharacterSet=65001 will needed for UTF-8 settings Dim strConnString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Information Source=" & strFolderPath & ";Extended Properties='text;HDR=Yes;FMT=Delimited;CharacterSet=65001;'" Dim conn As New OleDbConnection(strConnString) Try conn.Open() Dim cmd Equally New OleDbCommand("SELECT * FROM [" & strFileName & "]", conn) Dim da Equally New OleDbDataAdapter() da.SelectCommand = cmd Dim ds As New DataSet() da.Fill(ds) da.Dispose() Return ds.Tables(0) Grab Return Cipher Finally conn.Close() End Try Catch ex As Exception Finish Try Finish Office Individual Sub Btnback_Click(ByVal sender Every bit System.Object, ByVal east Equally Organization.EventArgs) Handles Btnback.Click Me.Shut() Me.Dispose() Create.Show() End Sub End Course RUN PROJECT AND CHECK Last OUTPUT – vb .net write csv file
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