ASP.NET CSV & ADO.NET - System.Data.OleDb |
ASP.NET CSV & ADO - System.Data.OleDb ตัวอย่างนี้จะเป็นการเปิดไฟล์ CSV โดยใช้ ADO.NET และ NameSpace ของ System.Data.OleDb ผ่าน Driver ชื่อ Provider=Microsoft.Jet.OLEDB.4.0 การใช้ ADO.NET ในการอ่าน จำเป็นจะต้องมีชื่อฟิวด์ระบุใน Column แรก
Language Code :  VB.NET || C#
Framework : 1,2,3,4
csv/customer.csv
CustomerID,Name,Email,CountryCode,Budget,Used
"C001","Win Weerachai","[email protected]","TH","1,000,000.00","600,000.00"
"C002","John Smith","[email protected]","EN","2,000,000.00","800,000.00"
"C003","Jame Born","[email protected]","US","3,000,000.00","600,000.00"
"C004","Chalee Angel","[email protected]","US","4,000,000.00","100,000.00"
AspNetAdoReadCSV.aspx
<%@ Import Namespace="System.Data"%>
<%@ Import Namespace="System.Data.OleDb"%>
<%@ Page Language="VB" %>
<script runat="server">
Sub Page_Load(sender As Object, e As EventArgs)
Dim dt As DataTable
'*** Csv to DataTable ***'
dt = CsvCreateDataTable()
'*** BindData to Repeater ***'
myRepeater.DataSource = dt
myRepeater.DataBind()
End Sub
'*** DataTable ***'
Function CsvCreateDataTable() As DataTable
Dim objConn As New OleDbConnection
Dim dtAdapter As OleDbDataAdapter
Dim dt As New DataTable
Dim strConnString As String
strConnString = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source="&Server.MapPath("csv/") & _
";Extended Properties='TEXT;HDR=Yes;FMT=Delimited;Format=Delimited(,)'"
objConn = New OleDbConnection(strConnString)
objConn.Open()
Dim strSQL As String
strSQL = "SELECT * FROM customer.csv"
dtAdapter = New OleDbDataAdapter(strSQL, objConn)
dtAdapter.Fill(dt)
dtAdapter = Nothing
objConn.Close()
objConn = Nothing
Return dt '*** Return DataTable ***'
End Function
</script>
<html>
<head>
<title>ThaiCreate.Com ASP.NET - CSV</title>
</head>
<body>
<form id="form1" runat="server">
<asp:Repeater id="myRepeater" runat="server">
<HeaderTemplate>
<table border="1">
<tr>
<th>CustomerID</th>
<th>Name</th>
<th>Email</th>
<th>CountryCode</th>
<th>Budget</th>
<th>Used</th>
</tr>
</HeaderTemplate>
<ItemTemplate>
<tr>
<td align="center"><%#Container.DataItem(0) %></td> <!--or <Container.DataItem("CustomerID") -->
<td><%#Container.DataItem(1) %></td> <!--or <Container.DataItem("Name") -->
<td><%#Container.DataItem(2) %></td> <!--or <Container.DataItem("Email") -->
<td align="center"><%#Container.DataItem(3) %></td> <!--or <Container.DataItem("CountryCode") -->
<td align="right"><%#Container.DataItem(4) %></td> <!--or <Container.DataItem("Budget") -->
<td align="right"><%#Container.DataItem(5) %></td> <!--or <Container.DataItem("Used") -->
</tr>
</ItemTemplate>
</asp:Repeater>
</form>
</body>
</html>
Screenshot
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Load balance : Server 03
