本地主机错误 - 找不到此页面 - Asp.net Core MVC

Question

我正在尝试将 HTML 内容转换为 pdf 文件。当我点击打印收据按钮时，它应该显示收据的 pdf 文件。相反，它给出 无法找到此页面 错误。

这是按钮的代码：

 <form method="post" asp-action="ReceiptAsync">
            <div class="col-md-2">
                <button type="submit" class="btn btn-primary btn-lg p-2" id="generatePdf">Print Receipt</button>
            </div>
        </form>

控制器方法的代码如下：

public async Task<IActionResult> ReceiptAsync()
        {
            using (var stringWriter = new StringWriter())
            {
                var viewResult = _compositeViewEngine.FindView(ControllerContext, "ViewReceipt", false);
                if (viewResult == null)
                {
                    throw new ArgumentNullException("View Can't Be Found");
                }
                var viewDictionary = new ViewDataDictionary(new EmptyModelMetadataProvider(), new ModelStateDictionary());
                var viewContext = new ViewContext(

                    ControllerContext,
                    viewResult.View,
                    viewDictionary,
                    TempData,
                    stringWriter,
                    new HtmlHelperOptions()
                    );
                await viewResult.View.RenderAsync(viewContext);

                var htmlToPdf = new HtmlToPdf(1000, 1414);
                htmlToPdf.Options.DrawBackground = true;

                var pdf = htmlToPdf.ConvertHtmlString(stringWriter.ToString());
                var pdfbytes = pdf.Save();

                return File(pdfbytes, "application/pdf");
            }
        }

错误截图如下：

Answer 1

ASP.NET 核心 3.0 之前：

可以在 Payment/ReceiptAsync 访问前面的操作路线.
Link 生成需要指定 Async 后缀。

ASP.NET Core 3.0 之后：

可以在 Payment/Receipt 路由访问前面的操作。
Link生成不需要指定Async后缀。

因此您需要将代码更改为：

<form method="post" asp-action="Receipt">   //change `asp-action` here...
    <div class="col-md-2">
        <button type="submit" class="btn btn-primary btn-lg p-2" id="generatePdf">Print Receipt</button>
    </div>
</form>

参考：

[Discussion] Async suffix for controller action names will be trimmed by default

Async suffix removal from controller action names

本地主机错误 - 找不到此页面 - Asp.net Core MVC

Localhost Error - This page can't be found - Asp.net Core MVC

c#

asp.net-core-mvc

asp.net-core-5.0