Inserting CSV File Records Into Database Using ASP.NET C#

Vithal Wadje
9y
153.7k
0
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Article

Background

I have often read the common question in forum posts, how to upload CSV file records into a database but no one has provided the proper solution and many solutions contain a lot of code that is not required so by considering the preceding requirements I have decided to write this article to provide the solution to insert CSV file records into the database with a minimum amount of code. So let us start creating an application so beginners can also understand.

First create the table named Employee using the following script:

CREATE TABLE [dbo].[Employee](
[id] [int] IDENTITY(1,1) NOT NULL,
[Name] [varchar](50) NULL,
[City] [varchar](50) NULL,
[Address] [varchar](50) NULL,
[Designation] [varchar](50) NULL,
CONSTRAINT [PK_Employee] PRIMARY KEY CLUSTERED
(
[id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

Then the design view of the table will look such as follows

Create the some CSV file with the following records

Now Let us create the sample web application as follows:

"Start" - "All Programs" - "Microsoft Visual Studio 2010".
"File" - "New WebSite" - "C#" - "Empty WebSite" (to avoid adding a master page).
Provide the web site a name such as "InsertCSVFileIntoDataBase" or another as you wish and specify the location.
Then right-click on Solution Explorer - "Add New Item" - Add Web Form.
Drag and drop one Button and FileUploader controler onto the <form> section of the Default.aspx page.

Now the default.aspx Page source code will look such as follows.

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>Article by Vithal Wadje</title>
</head>
<body bgcolor="gray">
<form id="form1" runat="server">
<div style="color: White;">
<h4>
Article for C#Corner
</h4>
<table>
<tr>
<td>
Select File
</td>
<td>
<asp:FileUpload ID="FileUpload1" runat="server" />
</td>
<td>
</td>
<td>
<asp:Button ID="Button1" runat="server" Text="Upload" OnClick="Button1_Click" />
</td>
</tr>
</table> <br /><br />
</div>
</form>
</body>
</html>

Create a function for Sqlconnection as:

private void connection()
{
sqlconn = ConfigurationManager.ConnectionStrings["SqlCom"].ConnectionString;
con = new SqlConnection(sqlconn);
}

Create function to insert CSV file records into database using SqlBulkCopy as:

//Function to Insert Records
private void InsertCSVRecords(DataTable csvdt)
{
connection();
//creating object of SqlBulkCopy
SqlBulkCopy objbulk = new SqlBulkCopy(con);
//assigning Destination table name
objbulk.DestinationTableName = "Employee";
//Mapping Table column
objbulk.ColumnMappings.Add("Name", "Name");
objbulk.ColumnMappings.Add("City", "City");
objbulk.ColumnMappings.Add("Address", "Address");
objbulk.ColumnMappings.Add("Designation", "Designation");
//inserting Datatable Records to DataBase
con.Open();
objbulk.WriteToServer(csvdt);
con.Close();
}

Write the following code to read CSV File Records and call InsertCSVRecords function on button click as

protected void Button1_Click(object sender, EventArgs e)
{
//Creating object of datatable
DataTable tblcsv = new DataTable();
//creating columns
tblcsv.Columns.Add("Name");
tblcsv.Columns.Add("City");
tblcsv.Columns.Add("Address");
tblcsv.Columns.Add("Designation");
//getting full file path of Uploaded file
string CSVFilePath = Path.GetFullPath(FileUpload1.PostedFile.FileName);
//Reading All text
string ReadCSV = File.ReadAllText(CSVFilePath);
//spliting row after new line
foreach (string csvRow in ReadCSV.Split('\n'))
{
if (!string.IsNullOrEmpty(csvRow))
{
//Adding each row into datatable
tblcsv.Rows.Add();
int count = 0;
foreach (string FileRec in csvRow.Split(','))
{
tblcsv.Rows[tblcsv.Rows.Count - 1][count] = FileRec;
count++;
}
}
}
//Calling insert Functions
InsertCSVRecords(tblcsv);
}

The entire code of the default.aspx.cs page will look as follows:

using System;
using System.IO;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
public partial class _Default : System.Web.UI.Page
{
SqlConnection con;
string sqlconn;
protected void Page_Load(object sender, EventArgs e)
{
}
private void connection()
{
sqlconn = ConfigurationManager.ConnectionStrings["SqlCom"].ConnectionString;
con = new SqlConnection(sqlconn);
}
protected void Button1_Click(object sender, EventArgs e)
{
//Creating object of datatable
DataTable tblcsv = new DataTable();
//creating columns
tblcsv.Columns.Add("Name");
tblcsv.Columns.Add("City");
tblcsv.Columns.Add("Address");
tblcsv.Columns.Add("Designation");
//getting full file path of Uploaded file
string CSVFilePath = Path.GetFullPath(FileUpload1.PostedFile.FileName);
//Reading All text
string ReadCSV = File.ReadAllText(CSVFilePath);
//spliting row after new line
foreach (string csvRow in ReadCSV.Split('\n'))
{
if (!string.IsNullOrEmpty(csvRow))
{
//Adding each row into datatable
tblcsv.Rows.Add();
int count = 0;
foreach (string FileRec in csvRow.Split(','))
{
tblcsv.Rows[tblcsv.Rows.Count - 1][count] = FileRec;
count++;
}
}
}
//Calling insert Functions
InsertCSVRecords(tblcsv);
}
//Function to Insert Records
private void InsertCSVRecords(DataTable csvdt)
{
connection();
//creating object of SqlBulkCopy
SqlBulkCopy objbulk = new SqlBulkCopy(con);
//assigning Destination table name
objbulk.DestinationTableName = "Employee";
//Mapping Table column
objbulk.ColumnMappings.Add("Name", "Name");
objbulk.ColumnMappings.Add("City", "City");
objbulk.ColumnMappings.Add("Address", "Address");
objbulk.ColumnMappings.Add("Designation", "Designation");
//inserting Datatable Records to DataBase
con.Open();
objbulk.WriteToServer(csvdt);
con.Close();
}
}

Now run the application and upload the file as follows

Now click on the Upload button and see the records in the database table as

Now you have seen how the records are inserted into the database with minimal code and effort.

Notes

For detailed code please download the sample Zip file.
Do a proper validation such as date input values when implementing.
Make the changes in the web.config file depending on your server details for the connection string.

Summary

From all the preceding examples you have learned how to insert CSV File records into the database. I hope this article is useful for all readers, if you have a suggestion then please contact me.

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