Upload Multiple Images using Business Class in ASP.Net using C# and VB.Net

Hi nauna,

Check this sample. Now take its reference and correct your code.

HTML

<asp:FileUpload ID="FileUpload1" runat="server" multiple="multiple" />
<asp:Button ID="btnUpload" runat="server" Text="Upload" OnClick="OnUpload" /><br />

Class File

C#

using System;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Net;
using System.Web;

public class UploadClass
{
    public string UploadImages(HttpPostedFile postedFile)
    {
        string uploadFileName = "";
        string ext = Path.GetExtension(postedFile.FileName).ToLower();
        if (ext == ".jpg" || ext == ".jpeg" || ext == ".gif" || ext == ".png" || ext == ".pdf" ||
            ext == ".docx" || ext == ".pptx" || ext == ".xlsx" || ext == ".doc" || ext == ".xls" || ext == ".ppt")
        {
            uploadFileName = Guid.NewGuid().ToString() + ext;
        }
        string ftp = ftppath;
        string ftpFolder = domainname + "/DynamicImage/" + uploadFileName;
        string contentType = postedFile.ContentType;
        byte[] fileBytes = null;
        string fileName = Path.GetFileName(uploadFileName);
        postedFile.InputStream.Seek(0, SeekOrigin.Begin);
        using (var binaryReader = new BinaryReader(postedFile.InputStream))
        {
            fileBytes = binaryReader.ReadBytes(postedFile.ContentLength);
        }
        try
        {
            using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ConnectionString))
            {
                using (SqlCommand cmd = new SqlCommand("INSERT INTO tblImage VALUES(@FileName,@ContentType,@Data)"))
                {
                    cmd.CommandType = CommandType.Text;
                    cmd.Parameters.AddWithValue("@FileName", fileName);
                    cmd.Parameters.AddWithValue("@ContentType", contentType);
                    cmd.Parameters.AddWithValue("@Data", fileBytes);
                }
            }
            FtpWebRequest request = (FtpWebRequest)WebRequest.Create(ftp + ftpFolder);
            request.Method = WebRequestMethods.Ftp.UploadFile;
            request.Credentials = new NetworkCredential(username, password);
            request.ContentLength = fileBytes.Length;
            request.UsePassive = true;
            request.UseBinary = true;
            request.ServicePoint.ConnectionLimit = fileBytes.Length;
            request.EnableSsl = false;
            using (Stream requestStream = request.GetRequestStream())
            {
                requestStream.Write(fileBytes, 0, fileBytes.Length);
                requestStream.Close();
            }
            FtpWebResponse response = (FtpWebResponse)request.GetResponse();
            path = returnpath + "/DynamicImage/" + uploadFileName;
            response.Close();
        }
        catch (WebException ex)
        {
            throw new Exception((ex.Response as FtpWebResponse).StatusDescription);
        }
        return path;
    }
}

VB.Net

Imports System
Imports System.Configuration
Imports System.Data
Imports System.Data.SqlClient
Imports System.IO
Imports System.Net
Imports System.Web

Public Class UploadClass
    Public Function UploadImages(ByVal postedFile As HttpPostedFile) As String
        Dim uploadFileName As String = ""
        Dim ext As String = Path.GetExtension(postedFile.FileName).ToLower()

        If ext = ".jpg" OrElse ext = ".jpeg" OrElse ext = ".gif" OrElse ext = ".png" OrElse ext = ".pdf" OrElse ext = ".docx" _
                OrElse ext = ".pptx" OrElse ext = ".xlsx" OrElse ext = ".doc" OrElse ext = ".xls" OrElse ext = ".ppt" Then
            uploadFileName = Guid.NewGuid().ToString() & ext
        End If

        Dim ftp As String = ftppath
        Dim ftpFolder As String = domainname & "/DynamicImage/" & uploadFileName
        Dim contentType As String = postedFile.ContentType
        Dim fileBytes As Byte() = Nothing
        Dim fileName As String = Path.GetFileName(uploadFileName)
        postedFile.InputStream.Seek(0, SeekOrigin.Begin)

        Using binaryReader = New BinaryReader(postedFile.InputStream)
            fileBytes = binaryReader.ReadBytes(postedFile.ContentLength)
        End Using

        Try
            Using con As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("constr").ConnectionString)
                Using cmd As SqlCommand = New SqlCommand("INSERT INTO tblImage VALUES(@FileName,@ContentType,@Data)")
                    cmd.CommandType = CommandType.Text
                    cmd.Parameters.AddWithValue("@FileName", fileName)
                    cmd.Parameters.AddWithValue("@ContentType", contentType)
                    cmd.Parameters.AddWithValue("@Data", fileBytes)
                End Using
            End Using

            Dim request As FtpWebRequest = CType(WebRequest.Create(ftp & ftpFolder), FtpWebRequest)
            request.Method = WebRequestMethods.Ftp.UploadFile
            request.Credentials = New NetworkCredential(username, password)
            request.ContentLength = fileBytes.Length
            request.UsePassive = True
            request.UseBinary = True
            request.ServicePoint.ConnectionLimit = fileBytes.Length
            request.EnableSsl = False

            Using requestStream As Stream = request.GetRequestStream()
                requestStream.Write(fileBytes, 0, fileBytes.Length)
                requestStream.Close()
            End Using

            Dim response As FtpWebResponse = CType(request.GetResponse(), FtpWebResponse)
            path = returnpath & "/DynamicImage/" & uploadFileName
            response.Close()
        Catch ex As WebException
            Throw New Exception((TryCast(ex.Response, FtpWebResponse)).StatusDescription)
        End Try

        Return path
    End Function
End Class

Code

C#

protected void OnUpload(object sender, EventArgs e)
{
    if (FileUpload1.HasFiles)
    {
        foreach (HttpPostedFile postedFile in FileUpload1.PostedFiles)
        {
            Image1.ImageUrl = UploadImages(postedFile);
        }
    }
}

VB.Net

Protected Sub OnUpload(ByVal sender As Object, ByVal e As EventArgs)
    If FileUpload1.HasFiles Then
        For Each postedFile As HttpPostedFile In FileUpload1.PostedFiles
            Image1.ImageUrl = UploadImages(postedFile)
        Next
    End If
End Sub