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<!DOCTYPE html>
<html>
<head>
<title>File Upload Example</title>
</head>
<body>
<form runat="server">
<div>
<asp:FileUpload ID="fileUpload" runat="server" />
<asp:CustomValidator ID="fileValidator" runat="server" ControlToValidate="fileUpload"
ClientValidationFunction="validateFileExtension" OnServerValidate="fileValidator_ServerValidate"
ErrorMessage="Only JPEG, PNG, and SVG files are allowed." />
<asp:Button ID="submitButton" runat="server" Text="Upload" OnClick="submitButton_Click" />
</div>
</form>
<script type="text/javascript">
function validateFileExtension(sender, args) {
var fileName = args.Value;
var ext = fileName.substring(fileName.lastIndexOf('.') + 1).toLowerCase();
if (ext === "jpg" || ext === "jpeg" || ext === "png" || ext === "svg") {
args.IsValid = true;
} else {
args.IsValid = false;
}
}
</script>
</body>
</html>
using System;
using Emgu.CV;
using Emgu.CV.CvEnum;
using Emgu.CV.Structure;
using Emgu.CV.Cuda;
using Emgu.CV.UI;
namespace YourNamespace
{
public partial class UploadPage : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void fileValidator_ServerValidate(object source, ServerValidateEventArgs args)
{
string fileName = fileUpload.FileName;
string ext = fileName.Substring(fileName.LastIndexOf('.') + 1).ToLower();
args.IsValid = (ext == "jpg" || ext == "jpeg" || ext == "png" || ext == "svg");
}
protected void submitButton_Click(object sender, EventArgs e)
{
if (IsValid)
{
// Load the uploaded image
var image = new Image<Bgr, byte>(fileUpload.FileContent);
// Load the Haar Cascade for face detection
var faceCascade = new CascadeClassifier(Server.MapPath("~/App_Data/haarcascade_frontalface_default.xml"));
// Detect faces in the image
var faces = faceCascade.DetectMultiScale(image, 1.1, 10, Size.Empty);
if (faces.Length > 0)
{
// At least one face was detected
// Process the result or display a message
}
else
{
// No faces were detected
// Process the result or display a message
}
}
}
}
}
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