Import Excel Data into GridView & Export to Excel Sheet

Poonu Verma
14y
61.5k
0
1

Article

Introduction

Recently I worked on a site in which we were required to import excel in website and calculate internal fields then display in grid view and save data in database then export to excel File.

That was really nice and I decided to put the code here.

1) Aspx Page

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Export_excel_.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>Import Excel Data into GridView & Again Export to Excel Sheet</title>

.hdr

{

background: #ccc;

font-family: Arial;

font-size: 12px;

color: #fff;

}

.ftr

{

background: #000;

color: #fff;

font-family: Arial;

font-size: 12px;

color: #fff;

}

.hdr1

{

background: #FF0000;

font-family: Arial;

font-size: 12px;

font-weight: bold;

color: #fff;

}

.ftr1

{

background: #000;

color: #fff;

font-family: Arial;

font-size: 12px;

color: #fff;

}

.Row

{

background: #ccc;

text-align: center;

font-size: 12px;

color: #000;

}

.Alt

{

background: ##808000;

text-align: center;

font-size: 12px;

color: #000;

}

</style>

function exportToExcel() {

var oExcel = new ActiveXObject("Excel.Application");

var oBook = oExcel.Workbooks.Add;

var oSheet = oBook.Worksheets(1);

var dt = document.getElementById('tbl')

for (var y = 0; y < dt.rows.length; y++)

// detailsTable is the table where the content to be exported is

{

for (var x = 0; x < dt.rows(y).cells.length; x++)

{

oSheet.Cells(y + 1, x + 1) = dt.rows(y).cells(x).innerText;

}

oExcel.Visible = true;

oExcel.UserControl = true;

}

</script>

</head>

<body>

<div>

<table cellpadding="10" cellspacing="10" style="font-family: Arial; font-size: 12px;

border: solid 1px #ccc;" border="1" align="center">

<tr>

<asp:FileUpload ID="FileUpload1" runat="server" />

</td>

<td>

<asp:Button ID="btnUpload" runat="server" Text="Upload" OnClick="btnUpload_Click" />

</td>

</tr>

<tr>

<asp:GridView ID="GridView1" runat="server" AllowPaging="false" OnPageIndexChanging="PageIndexChanging">

</asp:GridView>

</td>

</tr>

<tr>

<asp:GridView ID="GridView2" runat="server" AllowPaging="false">

</asp:GridView>

</td>

</tr>

<tr>

<asp:Button ID="Save_ExporttoExcel" runat="server" Text="Save to DB & Export to Excel"

OnClientClick="exportToExcel()" OnClick="Save_ExporttoExcel_Click" />

</td>

</tr>

<tr>

<asp:Label ID="lblError" runat="server" Text="Label"></asp:Label>

</td>

</tr>

</table>

</div>

</form>

</body>

</html>

2) .Cs Page

using System;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data;

using System.Data.OleDb;

using System.Data.SqlClient;

using System.IO;

using System.Configuration;

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

lblError.Visible = false;

}

// Upload excel files.

protected void btnUpload_Click(object sender, EventArgs e)

{

if (FileUpload1.HasFile)

{

string FileName = Path.GetFileName(FileUpload1.PostedFile.FileName);

string Extension = Path.GetExtension(FileUpload1.PostedFile.FileName);

string FolderPath = ConfigurationManager.AppSettings["FolderPath"];

string FilePath = Server.MapPath(FolderPath + FileName);

FileUpload1.SaveAs(FilePath);

Import_To_Grid(FilePath, Extension);

}

// Bind with Grid

private void Import_To_Grid(string FilePath, string Extension)

{

string conStr = "";

switch (Extension)

{

case ".xls": //Excel 97-03

conStr = ConfigurationManager.ConnectionStrings["Excel03ConString"].ConnectionString;

break;

case ".xlsx": //Excel 07

conStr = ConfigurationManager.ConnectionStrings["Excel07ConString"].ConnectionString;

break;

}

conStr = String.Format(conStr, FilePath, 1);

OleDbConnection connExcel = new OleDbConnection(conStr);

OleDbCommand cmdExcel = new OleDbCommand();

OleDbDataAdapter oda = new OleDbDataAdapter();

DataTable dt = new DataTable();

cmdExcel.Connection = connExcel;

connExcel.Open();

DataTable dtExcelSchema;

dtExcelSchema = connExcel.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

string SheetName = dtExcelSchema.Rows[0]["TABLE_NAME"].ToString();

connExcel.Close();

//Read Data from First Sheet

connExcel.Open();

cmdExcel.CommandText = "SELECT * From [" + SheetName + "]";

oda.SelectCommand = cmdExcel;

oda.Fill(dt);

connExcel.Close();

GridView1.DataSource = dt;

GridView1.DataBind();

// Creat Temproary table

DataTable dttable_data = new DataTable();

dttable_data = dt; //Return Table consisting data

//Create Tempory Table

DataTable dtTemp = new DataTable();

// Creating Header Row

dtTemp.Columns.Add(" S. No.");

dtTemp.Columns.Add(" Student Name ");

dtTemp.Columns.Add(" Roll No ");

dtTemp.Columns.Add(" Total Marks ");

dtTemp.Columns.Add(" Percentage");

int sum;

DataRow drAddItem;

for (int i = 0; i < dttable_data.Rows.Count; i++)

{

drAddItem = dtTemp.NewRow();

drAddItem[0] = dttable_data.Rows[i]["S# No#"].ToString();

drAddItem[1] = dttable_data.Rows[i]["Student Name"].ToString();//Student Name

drAddItem[2] = dttable_data.Rows[i]["Roll No#"].ToString();//Roll No

//Sum

sum = (int.Parse(dttable_data.Rows[i]["Hindi"].ToString()) + int.Parse(dttable_data.Rows[i]["English"].ToString()) + int.Parse(dttable_data.Rows[i]["Maths"].ToString()) + int.Parse(dttable_data.Rows[i]["Physics"].ToString()));

drAddItem[3] = sum.ToString();

//%age

int prcnt = (sum*100/800);

drAddItem[4] = prcnt.ToString();

dtTemp.Rows.Add(drAddItem);

}

//Bind Data with Grid View

GridView2.DataSource = dtTemp;

GridView2.DataBind();

}

// Page Index Changing

protected void PageIndexChanging(object sender, GridViewPageEventArgs e)

{

string FolderPath = ConfigurationManager.AppSettings["FolderPath"];

string FileName = GridView1.Caption;

string Extension = Path.GetExtension(FileName);

string FilePath = Server.MapPath(FolderPath + FileName);

Import_To_Grid(FilePath, Extension);

GridView1.PageIndex = e.NewPageIndex;

GridView1.DataBind();

}

// Write in Excel Sheet

private void creatExcel()

{

if (Int32.Parse(GridView2.Rows.Count.ToString()) < 65536)

{

GridView2.AllowPaging = true;

//grvProdReport.DataBind()

StringWriter tw = new StringWriter();

System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);

HtmlForm frm = new HtmlForm();

string strTmpTime = (System.DateTime.Today).ToString();

if (strTmpTime.IndexOf("/") != -1)

{

strTmpTime = strTmpTime.Replace("/", "-").ToString().Trim();

}

if (strTmpTime.IndexOf(":") != -1)

{

strTmpTime = strTmpTime.Replace(":", "-").ToString().Trim();

}

Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

Response.AddHeader("content-disposition", "attachment;filename=sheet.xls");

Response.Charset = "UTF-8";

EnableViewState = false;

Controls.Add(frm);

frm.Controls.Add(GridView2);

frm.RenderControl(hw);

hw.WriteLine("<b> <u> <font-size:'5'> Student Report </font> </u> </b>");

Response.Write(tw.ToString());

Response.End();

}

else

{

lblError.Visible = true;

lblError.Text = "Export to Excel not possible";

}

// insert value in database

private void inst_data()

{

int i;

string s = ConfigurationManager.ConnectionStrings["test_"].ConnectionString;

SqlConnection con = new SqlConnection(s);

for (i = 0; i <= GridView1.Rows.Count - 1; i++)

{

string query = "insert into tbl_studentsummary values ('" + GridView2.Rows[i].Cells[0].Text + "','" + GridView2.Rows[i].Cells[1].Text.ToString() + "','" + GridView2.Rows[i].Cells[2].Text + "','" + GridView2.Rows[i].Cells[3].Text + "','" + GridView2.Rows[i].Cells[4].Text + "')";

SqlCommand cmd = new SqlCommand(query,con);

con.Open();

cmd.ExecuteNonQuery();

con.Close();

lblError.Visible = true;

lblError.Text = "Sucessfull";

}

protected void Save_ExporttoExcel_Click(object sender, EventArgs e)

{

inst_data(); // insert data in database.

creatExcel(); // Creat Excel File

}

3) web.config

</connectionStrings>

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