Question

我想从数据库执行上载和下载。在 MVC Core 中，它正常工作，但是我无法转换MVC控制器方法输入到Razor Pages的Handler方法中。如何做到。如果有人帮助我将感到非常高兴。以下是有关我的应用程序的更多详细信息

MVC Core的控制器方法

[HttpPost]  
  public async Task<IActionResult> UploadFile(IFormFile file)  
  {  
      if (file == null || file.Length == 0)  
          return Content("file not selected");  
  
      var path = Path.Combine(  
                  Directory.GetCurrentDirectory(), "wwwroot",   
                  file.GetFilename());  
  
      using (var stream = new FileStream(path, FileMode.Create))  
      {  
          await file.CopyToAsync(stream);  
      }  
  
      return RedirectToAction("Files");  
  }  
  
  public async Task<IActionResult> Download(string filename)  
  {  
      if (filename == null)  
          return Content("filename not present");  
  
      var path = Path.Combine(  
                     Directory.GetCurrentDirectory(),  
                     "wwwroot", filename);  
  
      var memory = new MemoryStream();  
      using (var stream = new FileStream(path, FileMode.Open))  
      {  
          await stream.CopyToAsync(memory);  
      }  
      memory.Position = 0;  
      return File(memory, GetContentType(path), Path.GetFileName(path));  
  }

如何在剃刀页面中表示以上方法

Answer 1

尝试按照以下步骤更改“剃刀页面”：

在File中添加Pages剃刀页面

其内容为

public class FileModel : PageModel
{
    public void OnGet()
    {

    }
    [BindProperty]
    public IFormFile FormFile { get; set; }
    [IgnoreAntiforgeryToken]
    public async Task<IActionResult> OnPostUploadFileAsync()
    {

        return RedirectToPage("Index");
    }
    public async Task<IActionResult> OnGetDownloadAsync(string filename)
    {
        if (filename == null)
            return Content("filename not present");

        var path = Path.Combine(
                    Directory.GetCurrentDirectory(),
                    "wwwroot", filename);

        var memory = new MemoryStream();
        using (var stream = new FileStream(path, FileMode.Open))
        {
            await stream.CopyToAsync(memory);
        }
        memory.Position = 0;
        return File(memory, "application/octet-stream", Path.GetFileName(path));
    }
}

其视图为

@page
@model TestRazor.Pages.FileModel
@{
    ViewData["Title"] = "File";
}

<h2>File</h2>

<div class="row">
    <div class="col-md-4">
        <form method="post" asp-page-handler="UploadFile" enctype="multipart/form-data">
            <div class="form-group">
                <label asp-for="FormFile" class="control-label"></label>
                <input asp-for="FormFile" type="file" class="form-control" style="height:auto" />
                <span asp-validation-for="FormFile" class="text-danger"></span>
            </div>
            <input type="submit" value="Upload" class="btn btn-default" />
        </form>
    </div>
</div>

对OnGetDownloadAsync的请求为https://localhost:44332/file?handler=download&filename=test.txt
对于“上传”加载文件，请转到https://localhost:44332/file，然后单击“上传”按钮以上传文件

有关“剃刀”页面的更多信息，请参见Upload files to a Razor Page in ASP.NET Core

如何在Core Razor Pages 2.0中表示MVC Core Controller Action方法相同

1 个答案: