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How to read CSV file in asp.net
almost 9 years ago
CSV file contains Comma Separated Values in plain text format. For an example, refer the below screenshot:
To understand this functionality first we will read CSV file by using DataTable and then we will display csv file data in gridview.
In Your design Page:(Webform.aspx) We will add a FileUpload control, a gridview control
and a button Control.Using FileUpload Control we will select Csv file then we will click on upload button to display the data in gridview.
Include the following code in design part:
<head runat="server"> <title>ReadCsvFile</title> </head> <body> <form id="form1" runat="server"> <div style="color: black;"> <h4> Read CSV File and display the data in a GridView </h4> <asp:GridView ID="CsvGridView" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None"> <AlternatingRowStyle BackColor="White" /> <EditRowStyle BackColor="#7C6F57" /> <FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" /> <HeaderStyle BackColor="#BC005A" Font-Bold="True" ForeColor="White" /> <PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" /> <RowStyle BackColor="#E3EAEB" /> <SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" /> <SortedAscendingCellStyle BackColor="#F8FAFA" /> <SortedAscendingHeaderStyle BackColor="#246B61" /> <SortedDescendingCellStyle BackColor="#D4DFE1" /> <SortedDescendingHeaderStyle BackColor="#15524A" /> </asp:GridView> <br /> <br /> <table> <tr> <td> Please Select Your Csv File </td> <td> <asp:FileUpload ID="CsvFileUpload" runat="server" /> </td> <td> </td> <td> <asp:Button ID="CsvButton" runat="server" Text="Upload" OnClick="UploadCsvFile" /> </td> </tr> </table> </div> </form> </body>
In Code behind file(Webform.aspx.cs):
1. First Include the following code on button click event:
protected void UploadCsvFile(object sender, EventArgs e) { DataTable csvtbl = new DataTable(); csvtbl.Columns.Add("Name"); csvtbl.Columns.Add("EmailId"); csvtbl.Columns.Add("Department"); csvtbl.Columns.Add("Designation"); string GetCsvFilePath = Path.GetFullPath(CsvFileUpload.PostedFile.FileName); string ReadCSVFile = File.ReadAllText(GetCsvFilePath); foreach (string CsvFileRow in ReadCSVFile.Split('\n')) { if (!string.IsNullOrEmpty(CsvFileRow)) { csvtbl.Rows.Add(); int count = 0; foreach (string CsvFileRec in CsvFileRow.Split(',')) { csvtbl.Rows[csvtbl.Rows.Count - 1][count] = CsvFileRec; count++; } } //Call BindgridCsv Function BindgridCsv(csvtbl); } }2. We create a function to display CSV file data in gridview and call the Function inside button click event as we have shown you above:
private void BindgridCsv(DataTable dtcsv) { CsvGridView.DataSource = dtcsv; CsvGridView.DataBind(); }Please have a look on screenshot:
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