steps :
1) Create Simple Web Application Using (ASP.Net with C#).
2) Create Class CSVReader (CSVReader.cs)
1: using System;
2: using System.Data;
3: using System.Configuration;
4: using System.Web;
5: using System.Web.Security;
6: using System.Web.UI;
7: using System.Web.UI.WebControls;
8: using System.Web.UI.WebControls.WebParts;
9: using System.Web.UI.HtmlControls;
10: using System.IO;
11: using System.Text;
12: using System.Collections;
13:
14: public class CSVReader
15: {
16: //
17: private Stream objStream;
18: private StreamReader objReader;
19:
20: //add name space System.IO.Stream
21: public CSVReader(Stream filestream) : this(filestream, null) { }
22:
23: public CSVReader(Stream filestream, Encoding enc)
24: {
25: this.objStream = filestream;
26: //check the Pass Stream whether it is readable or not
27: if (!filestream.CanRead)
28: {
29: return;
30: }
31: objReader = (enc != null) ? new StreamReader(filestream, enc) : new StreamReader(filestream);
32: }
33: //parse the Line
34: public string[] GetCSVLine()
35: {
36: string data = objReader.ReadLine();
37: if (data == null) return null;
38: if (data.Length == 0) return new string[0];
39: //System.Collection.Generic
40: ArrayList result = new ArrayList();
41: //parsing CSV Data
42: ParseCSVData(result, data);
43: return (string[])result.ToArray(typeof(string));
44: }
45:
46: private void ParseCSVData(ArrayList result, string data)
47: {
48: int position = -1;
49: while (position < data.Length)
50: result.Add(ParseCSVField(ref data, ref position));
51: }
52:
53: private string ParseCSVField(ref string data, ref int StartSeperatorPos)
54: {
55: if (StartSeperatorPos == data.Length - 1)
56: {
57: StartSeperatorPos++;
58: return "";
59: }
60:
61: int fromPos = StartSeperatorPos + 1;
62: if (data[fromPos] == '"')
63: {
64: int nextSingleQuote = GetSingleQuote(data, fromPos + 1);
65: int lines = 1;
66: while (nextSingleQuote == -1)
67: {
68: data = data + "\n" + objReader.ReadLine();
69: nextSingleQuote = GetSingleQuote(data, fromPos + 1);
70: lines++;
71: if (lines > 20)
72: throw new Exception("lines overflow: " + data);
73: }
74: StartSeperatorPos = nextSingleQuote + 1;
75: string tempString = data.Substring(fromPos + 1, nextSingleQuote - fromPos - 1);
76: tempString = tempString.Replace("'", "''");
77: return tempString.Replace("\"\"", "\"");
78: }
79:
80: int nextComma = data.IndexOf(',', fromPos);
81: if (nextComma == -1)
82: {
83: StartSeperatorPos = data.Length;
84: return data.Substring(fromPos);
85: }
86: else
87: {
88: StartSeperatorPos = nextComma;
89: return data.Substring(fromPos, nextComma - fromPos);
90: }
91: }
92:
93: private int GetSingleQuote(string data, int SFrom)
94: {
95: int i = SFrom - 1;
96: while (++i < data.Length)
97: if (data[i] == '"')
98: {
99: if (i < data.Length - 1 && data[i + 1] == '"')
100: {
101: i++;
102: continue;
103: }
104: else
105: return i;
106: }
107: return -1;
108: }
109: }
110:
3) put below control in to the aspx page.
<table> <tr> <td> <asp:FileUpload ID="FileUpload1" runat="server" /> </td> <td> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Upload CSV" /> </td> </tr> <tr> <td colspan="2"> <asp:Label ID="lblMsg" Text="Please Select Proper File" runat="server" BorderColor="White" Font-Bold="True" ForeColor="Red" Visible="false"></asp:Label> </td> </tr> <tr> <td> <asp:GridView ID="gv" runat="server"></asp:GridView> </td> </tr> </table>
4) In Code Behind File Put Below Code.
1: protected void Button1_Click(object sender, EventArgs e)
2: {
3: if (FileUpload1.PostedFile.FileName == string.Empty)
4: {
5: lblMsg.Visible = true;
6: return;
7: }
8: else
9: {
10: //save the file
11: //restrict user to upload other file extenstion
12: string[] FileExt = FileUpload1.FileName.Split('.');
13: string FileEx = FileExt[FileExt.Length - 1];
14: if (FileEx.ToLower() == "csv")
15: {
16: FileUpload1.SaveAs(Server.MapPath("CSVLoad//" + FileUpload1.FileName));
17: }
18: else
19: {
20: lblMsg.Visible = true;
21: return;
22: }
23: }
24:
25: //create object for CSVReader and pass the stream
26: CSVReader reader = new CSVReader(FileUpload1.PostedFile.InputStream);
27: //get the header
28: string[] headers = reader.GetCSVLine();
29: DataTable dt = new DataTable();
30: //add headers
31: foreach (string strHeader in headers)
32: dt.Columns.Add(strHeader);
33:
34: string[] data;
35: while ((data = reader.GetCSVLine()) != null)
36: dt.Rows.Add(data);
37: //bind gridview
38: gv.DataSource = dt;
39: gv.DataBind();
40:
41: }
5) create Folder In WebSite CSVLoad for Save Uploaded CSV File.
Thnx
