我正在使用 ASP.Net Core 2.0 和 Razor Pages 处理应用程序。我一直在关注有关如何将文件上传到 Azure blob 存储的 Microsoft Docs，但到目前为止我无法让它工作。
我有两个单独的模型类。一个用于文件上传，一个用于 Word。
文件上传类:
public class WordUpload
{
public IFormFile SoundFile { get; set; }
public IFormFile SoundFileSentence { get; set; }
}
其他类:
public class Word
{
public int ID { get; set; }
public string Answer { get; set; }
public string AlternativeAnswer { get; set; }
public string Hint { get; set; }
public int Length { get; set; }
public int Vowels { get; set; }
public string Language { get; set; }
public string Category { get; set; }
public int Module { get; set; }
public string Difficulty { get; set; }
public string Sound { get; set; }
public string SoundSentence { get; set; }
}
带有未传递的 WordUpload.SoundFile 的页面。这是问题，因为它总是返回 null。
public class CreateModel : PageModel
{
private readonly Data.ApplicationDbContext _context;
private readonly IWordRepository _wordRepository;
public CreateModel(Data.ApplicationDbContext context, IWordRepository wordRepository)
{
_context = context;
_wordRepository = wordRepository;
}
/// <summary>
/// OnGet triggers when the page is opened
/// </summary>
/// <returns></returns>
public IActionResult OnGet()
{
Word = new Word
{
Answer = "",
AlternativeAnswer = "",
Hint = "Hint",
Length = 0,
Vowels = 0,
Language = "DK",
Category = "",
Module = 0,
Difficulty = "",
Sound = "",
SoundSentence = ""
};
return Page();
}
[BindProperty]
public WordUpload WordUpload { get; set; }
[BindProperty]
public Word Word { get; set; }
/// <summary>
/// Posts the data to the database async
/// </summary>
/// <returns></returns>
public async Task<IActionResult> OnPostAsync()
{
if (!ModelState.IsValid)
{
return Page();
}
// Get the number of vowels in the word
Word.Vowels = _wordRepository.NumberOfVowels(Word.Answer);
// Save the length
Word.Length = Word.Answer.Length;
// upload file to blob storage
Word.Sound = _wordRepository.UploadAudio(WordUpload.SoundFile);
// save to db
_context.Word.Add(Word);
await _context.SaveChangesAsync();
return RedirectToPage("./Index");
}
}
和 View - 页面:
@page
@model Fabetio.Web.Pages.Words.CreateModel
@{
ViewData["Title"] = "Create";
}
<div class="container-fluid darkblue-background">
<br>
<br>
<div class="row">
<div class="col-md-6 col-md-offset-3">
<div class="task--card">
<div class="dasboard--title">
<h1>@ViewData["Title"]</h1>
<p class="subtitle">Subtitle.</p>
</div>
<form method="post">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<input type="hidden" asp-for="Word.ID" />
<div class="form-group">
<label asp-for="Word.Answer" class="control-label"></label>
<input asp-for="Word.Answer" class="form-control" />
<span asp-validation-for="Word.Answer" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Word.AlternativeAnswer" class="control-label"></label>
<input asp-for="Word.AlternativeAnswer" class="form-control" />
<span asp-validation-for="Word.AlternativeAnswer" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Word.Hint" class="control-label"></label>
<input asp-for="Word.Hint" class="form-control" />
<span asp-validation-for="Word.Hint" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Word.Language" class="control-label"></label>
<input asp-for="Word.Language" class="form-control" />
<span asp-validation-for="Word.Language" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Word.Category" class="control-label"></label>
<input asp-for="Word.Category" class="form-control" />
<span asp-validation-for="Word.Category" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Word.Module" class="control-label"></label>
<input asp-for="Word.Module" class="form-control" />
<span asp-validation-for="Word.Module" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Word.Difficulty" class="control-label"></label>
<input asp-for="Word.Difficulty" class="form-control" />
<span asp-validation-for="Word.Difficulty" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="WordUpload.SoundFile" class="control-label"></label>
<input asp-for="WordUpload.SoundFile" type="file" class="form-control" />
<span asp-validation-for="WordUpload.SoundFile" class="text-danger"></span>
</div>
<br>
<br>
<div class="form-group">
<input type="submit" value="Create" class="btn btn--blue" />
</div>
</form>
</div>
</div>
</div>
<br>
<br>
</div>
@section Scripts {
@{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
}
WordUpload.SoundFile 不与模型一起传递。当我调试应用程序时，它在 Controller /页面中返回为 null。所有其他属性都通过，没有任何问题。
你知道如何传递文件吗？
最佳答案
你需要在你的表单上添加这个:
<form method="post" enctype="multipart/form-data">
在您的 post 方法中，如果您在模型绑定(bind)没有将文件绑定(bind)到模型时遇到任何问题，您可以直接从 Form.Files 获取它，如下所示:
var formFile = HttpContext.Request.Form.Files[0];
您应该首先检查 HttpContext.Request.Form.Files.Length > 0 或该代码将引发错误。然后将字节复制到您的模型以保存。
另见documentation
关于c# - 如何在 ASP.Net Core 2.0 Razor 页面中发布 IFormFile？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/50861800/