AJAX在C#中实现文件异步上传

发布时间：2024-09-09 13:21:45 作者：小樊
来源：亿速云阅读：82

在C#中实现AJAX文件异步上传，通常需要使用ASP.NET MVC或ASP.NET Core。这里我将为你提供一个简单的示例，展示如何在ASP.NET Core中实现AJAX文件异步上传。

首先，创建一个新的ASP.NET Core项目，并添加以下NuGet包：
- Microsoft.AspNetCore.Http
- Microsoft.AspNetCore.Mvc
在项目中创建一个名为UploadController的控制器，并添加以下代码：

using System;
using System.IO;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

[Route("api/[controller]")]
[ApiController]
public class UploadController : ControllerBase
{
    [HttpPost]
    public async Task<IActionResult> Post()
    {
        try
        {
            var file = Request.Form.Files[0];
            var folderName = Path.Combine("Resources", "Images");
            var pathToSave = Path.Combine(Directory.GetCurrentDirectory(), folderName);

            if (file.Length > 0)
            {
                var fileName = ContentDispositionHeaderValue.Parse(file.ContentDisposition).FileName.Trim('"');
                var fullPath = Path.Combine(pathToSave, fileName);
                using (var stream = new FileStream(fullPath, FileMode.Create))
                {
                    await file.CopyToAsync(stream);
                }
            }

            return Ok();
        }
        catch (Exception ex)
        {
            return StatusCode(500, $"Internal server error: {ex.Message}");
        }
    }
}

在wwwroot文件夹中创建一个名为index.html的HTML文件，并添加以下代码：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <title>File Upload with AJAX</title>
   <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
   <input type="file" id="fileInput" />
   <button id="uploadButton">Upload</button>

   <script>
        $("#uploadButton").click(function () {
            const fileInput = document.getElementById("fileInput");
            const file = fileInput.files[0];
            const formData = new FormData();
            formData.append("file", file);

            $.ajax({
                url: "/api/upload",
                type: "POST",
                data: formData,
                processData: false,
                contentType: false,
                success: function (response) {
                    alert("File uploaded successfully!");
                },
                error: function (error) {
                    alert("Error during file upload: " + error.statusText);
                }
            });
        });
    </script>
</body>
</html>

现在，当你运行项目并访问http://localhost:<port>/index.html时，你可以选择一个文件并使用AJAX异步上传到服务器。上传的文件将被保存在项目的Resources/Images文件夹中。

AJAX在C#中实现文件异步上传

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