(C#) ASP.NET CSV & GridView |
(C#) ASP.NET CSV & GridView ตัวอย่างการเขียน ASP.NET เปิดไฟล์ CSV และ Bind ข้อมูลลงใน GridView
Language Code : VB.NET ||  C#
Framework : 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"
AspNetCsvGridView.aspx
<%@ Page Language="C#" Debug="true" %>
<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.Data.OleDb" %>
<script runat="server">
String strFields = "CustomerID";
void Page_Load(object sender,EventArgs e)
{
if(!Page.IsPostBack)
{
BindData();
}
}
void BindData()
{
OleDbConnection objConn = new OleDbConnection();
OleDbCommand objCmd = new OleDbCommand();
OleDbDataAdapter dtAdapter = new OleDbDataAdapter();
DataSet ds = new DataSet();
String strConnString,strSQL;
strConnString = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source="+Server.MapPath("csv/") +
";Extended Properties='TEXT;HDR=Yes;FMT=Delimited;Format=Delimited(,)'";
strSQL = "SELECT * FROM customer.csv ORDER BY " + strFields + " ASC";
objConn.ConnectionString = strConnString;
objCmd.Connection = objConn;
objCmd.CommandText = strSQL;
objCmd.CommandType = CommandType.Text;
dtAdapter.SelectCommand = objCmd;
dtAdapter.Fill(ds);
//*** BindData to GridView ***//
myGridView.DataSource = ds;
myGridView.DataBind();
dtAdapter = null;
objConn.Close();
objConn = null;
}
void ShowPageCommand(Object s,GridViewPageEventArgs e)
{
myGridView.PageIndex = e.NewPageIndex;
BindData();
}
void SortCommand(Object s,GridViewSortEventArgs e)
{
strFields = e.SortExpression;
BindData();
}
void myGridView_RowDataBound(Object sender,GridViewRowEventArgs e)
{
//*** CustomerID ***//
Label lblCustomerID = (Label)(e.Row.FindControl("lblCustomerID"));
if (lblCustomerID != null)
{
lblCustomerID.Text = (string)DataBinder.Eval(e.Row.DataItem, "CustomerID");
}
//*** Email ***//
Label lblName = (Label)(e.Row.FindControl("lblName"));
if (lblName != null)
{
lblName.Text = (string)DataBinder.Eval(e.Row.DataItem, "Name");
}
//*** Name ***//
Label lblEmail = (Label)(e.Row.FindControl("lblEmail"));
if (lblEmail != null)
{
lblEmail.Text = (string)DataBinder.Eval(e.Row.DataItem, "Email");
}
//*** CountryCode ***//
Label lblCountryCode = (Label)(e.Row.FindControl("lblCountryCode"));
if (lblCountryCode != null)
{
lblCountryCode.Text = (string)DataBinder.Eval(e.Row.DataItem, "CountryCode");
}
//*** Budget ***//
Label lblBudget = (Label)(e.Row.FindControl("lblBudget"));
if (lblBudget != null)
{
lblBudget.Text = (string)DataBinder.Eval(e.Row.DataItem, "Budget");
}
//*** Used ***//
Label lblUsed = (Label)(e.Row.FindControl("lblUsed"));
if (lblUsed != null)
{
lblUsed.Text = (string)DataBinder.Eval(e.Row.DataItem, "Used");
}
}
</script>
<html>
<head>
<title>ThaiCreate.Com ASP.NET - GridView</title>
</head>
<body>
<form id="form1" runat="server">
<asp:GridView id="myGridView" runat="server" PageSize="2" OnSorting="SortCommand"
OnPageIndexChanging="ShowPageCommand" AllowPaging="True" AllowSorting="True"
AutoGenerateColumns="False" onRowDataBound="myGridView_RowDataBound">
<Columns>
<asp:TemplateField SortExpression="CustomerID" HeaderText="CustomerID">
<ItemTemplate>
<asp:Label id="lblCustomerID" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField SortExpression="Name" HeaderText="Name">
<ItemTemplate>
<asp:Label id="lblName" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField SortExpression="Email" HeaderText="Email">
<ItemTemplate>
<asp:Label id="lblEmail" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField SortExpression="CountryCode" HeaderText="CountryCode">
<ItemTemplate>
<asp:Label id="lblCountryCode" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField SortExpression="Budget" HeaderText="Budget">
<ItemTemplate>
<asp:Label id="lblBudget" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField SortExpression="Used" HeaderText="Used">
<ItemTemplate>
<asp:Label id="lblUsed" runat="server"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</form>
</body>
</html>
คำอธิบาย
จากตัวอย่างจะเห็นว่า ASP.NET ใช้ ADO เข้ามาจัดการอ่านไฟล์ CSV ที่อยู่ในโฟเดอร์ csv/ ซึ่งสามารถอ่านได้อยู่ในรูปแบบของ DataTable หรือ DataSet
Screenshot
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ช่วยกันสนับสนุนรักษาเว็บไซต์ความรู้แห่งนี้ไว้ด้วยการสนับสนุน 
Load balance : Server 03
