Below is a complete C# example showing how to save an uploaded image to a folder using FormCollection in an ASP.NET MVC controller. This includes:
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Creating the directory if it doesn't exist
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Checking if a file with the same name already exists
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Deleting the old file if found
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Saving the new file
đ» C# Code (Controller)
[HttpPost]
public ActionResult UploadImage(FormCollection form)
{
// Assuming your file input name in the form is "imageFile"
HttpPostedFileBase file = Request.Files["imageFile"];
if (file != null && file.ContentLength > 0)
{
string fileName = Path.GetFileName(file.FileName);
string folderPath = Server.MapPath("~/UploadedImages"); // You can change the path
string fullPath = Path.Combine(folderPath, fileName);
// Create the directory if it doesn't exist
if (!Directory.Exists(folderPath))
{
Directory.CreateDirectory(folderPath);
}
// Check if the file already exists, and delete it
if (System.IO.File.Exists(fullPath))
{
System.IO.File.Delete(fullPath);
}
// Save the new file
file.SaveAs(fullPath);
ViewBag.Message = "Image uploaded successfully.";
}
else
{
ViewBag.Message = "Please select a valid image file.";
}
return View();
}
đ HTML View Example
using (Html.BeginForm("UploadImage", "YourControllerName", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<input type="file" name="imageFile" />
<input type="submit" value="Upload Image" />
<p>@ViewBag.Message</p>
}
đ Notes
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~/UploadedImagesis the folder where images will be stored inside your project directory. -
Make sure the folder you're writing to has write permissions, especially on a production server.
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This code works with standard form submissions, not AJAX. If you're using AJAX or APIs, the logic will be slightly different.