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Multiple Image Upload in ASP.NET


Multiple image upload:

There are some simple steps to understand this application.

Step 1: Create a new ASP.NET application.

Step 2: Write the following inline code on Default.aspx page.
 
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>WebForm1</title>
</head>
<body>
<form id="Form1" method="post" runat="server" style="width: 530px;">
    <fieldset>
    <legend>Upload Multiple Photos</legend>
    <div id="div1" runat="server">
        <input type="file" size="65" runat="server" id="FileUpload1">
        <input type="file" size="65" runat="server" id="FileUpload2">
        <input type="file" size="65" runat="server" id="FileUpload3">
        <input type="file" size="65" runat="server" id="FileUpload4">
        <input type="file" size="65" runat="server" id="FileUpload5">
    </div>
    <br />
    <div id="div2" runat="server" visible="false">
        <input type="file" size="65" runat="server" id="FileUpload6">
        <input type="file" size="65" runat="server" id="FileUpload7">
        <input type="file" size="65" runat="server" id="FileUpload8">
        <input type="file" size="65" runat="server" id="FileUpload9">
        <input type="file" size="65" runat="server" id="FileUpload10">
    </div>
    <br />
    <asp:Button ID="Button1" runat="server" Text="Upload" OnClick="Button1_Click" />
    <asp:Button ID="ButtonMore" runat="server" Text="Add 10 Photos" OnClick="ButtonMore_Click" />
    </fieldset>
    <br />

    <div id="div5" runat="server" visible="false">
    <fieldset>
    <legend>Show Photos</legend>
    <div id="div3" runat="server">
        <asp:Image ID="Image1" runat="server" Height="100" Width="100" ImageUrl="~/Image.gif" />
        <asp:Image ID="Image2" runat="server" Height="100" Width="100" ImageUrl="~/Image.gif" />
        <asp:Image ID="Image3" runat="server" Height="100" Width="100" ImageUrl="~/Image.gif" />
        <asp:Image ID="Image4" runat="server" Height="100" Width="100" ImageUrl="~/Image.gif" />
        <asp:Image ID="Image5" runat="server" Height="100" Width="100" ImageUrl="~/Image.gif" />
    </div>
    <br />
    <div id="div4" runat="server" visible="false">
        <asp:Image ID="Image6" runat="server" Height="100" Width="100" ImageUrl="~/Image.gif" />
        <asp:Image ID="Image7" runat="server" Height="100" Width="100" ImageUrl="~/Image.gif" />
        <asp:Image ID="Image8" runat="server" Height="100" Width="100" ImageUrl="~/Image.gif" />
        <asp:Image ID="Image9" runat="server" Height="100" Width="100" ImageUrl="~/Image.gif" />
        <asp:Image ID="Image10" runat="server" Height="100" Width="100" ImageUrl="~/Image.gif" />
    </div>
    </fieldset>
    </div>
</form>
</body>
</html>

Step 3: Now add the following namespace on the Default.aspx.cs page 

using System.IO;

Step 4:  Write the following line of code on the Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
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.IO;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        div5.Visible = true;
        HttpFileCollection uploadFilCol = Request.Files;
        for (int i = 0; i < uploadFilCol.Count; i++)
        {
            HttpPostedFile file = uploadFilCol[i];
            string fileExt = Path.GetExtension(file.FileName).ToLower();
            string fileName = Path.GetFileName(file.FileName);
            if (fileName != string.Empty)
            {
                try
                {
                    if (fileExt == ".jpg" || fileExt == ".gif" || fileExt == ".bmp" || fileExt == ".jpeg" || fileExt == ".png")
                    {
                        file.SaveAs(Server.MapPath("~/Images/") + fileName);
                        if (i == 0)
                        {
                            Image1.ImageUrl = "~/Images/" + fileName;
                        }
                        if (i == 1)
                        {
                            Image2.ImageUrl = "~/Images/" + fileName;
                        }
                        if (i == 2)
                        {
                            Image3.ImageUrl = "~/Images/" + fileName;
                        }
                        if (i == 3)
                        {
                            Image4.ImageUrl = "~/Images/" + fileName;
                        }
                        if (i == 4)
                        {
                            Image5.ImageUrl = "~/Images/" + fileName;
                        }
                        if (i == 5)
                        {
                            Image6.ImageUrl = "~/Images/" + fileName;
                        }
                        if (i == 6)
                        {
                            Image7.ImageUrl = "~/Images/" + fileName;
                        }
                        if (i == 7)
                        {
                            Image8.ImageUrl = "~/Images/" + fileName;
                        }
                        if (i == 8)
                        {
                            Image9.ImageUrl = "~/Images/" + fileName;
                        }
                        if (i == 9)
                        {
                            Image10.ImageUrl = "~/Images/" + fileName;
                        }
                    }
                }
                catch (Exception ex)
                {
                    throw ex;
                }
            }
        }
    }

    protected void ButtonMore_Click(object sender, EventArgs e)
    {
        if (ButtonMore.Text == "Only five")
        {
            div2.Visible = false;
            ButtonMore.Text = "Add 10 Photos";
            div4.Visible = false;
        }

        else if (ButtonMore.Text == "Add 10 Photos")
        {
            div2.Visible = true;
            ButtonMore.Text = "Only five";
            div4.Visible = true;
        }
    }
}

Step 5: Now run the application. You will get the following output.

Image1.JPG 

Figure 1:

Step 6: Now click on Browse button and select Images which you want to upload. 

Image2.JPG 

Figure 2:

Step7: Now click on the upload button. 

Image3.JPG 

Figure 3:

Step 8: And if you want to upload more image then click on 'Add 10 Photos' buttons. 

Image4.JPG 

Figure 4:

Step 9: Repeat step 6 and 7.

Step 10: Finally go to download files to understand more about this application.


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