ASP.NET Core 如何在新标签页中打开 PDF？

Question

在我的控制器中，我有以下操作来创建 PDF

public async Task<IActionResult> ExportMailingLabel(int CustomerID, int ProductID)
        {
            var mailingLabel = await NoticeService.CreateMailingLabel(CustomerID, ProductID);
            return File(mailingLabel.NoticeContents, "application/pdf", "MailingLabel.pdf");
        }

在我看来，我有以下链接，

<a asp-action="ExportMailingLabel" asp-controller="Product" asp-area="Product" asp-route-CustomerID="@Model.CustomerID" asp-route-ProductID="@Model.ProductID" class="btn btn-primary"><i class="fa fa-receipt"></i> View Mailing Label</a>

单击以在新选项卡中打开 PDF 而不是显示打开对话框时，我需要帮助。

我试过target="_blank"，但我似乎打开了一个新标签，但仍然显示打开的对话框

Answer 1

_target="blank" 是一个简单的 HTML 标签，我认为它可以在所有浏览器中按预期工作。您可以将其与静态或动态文件名一起使用，如下所示。

静态文件名用法

Controller.cs

public async Task<IActionResult> ExportMailingLabel(int CustomerID, int ProductID) {
    var mailingLabel = await NoticeService.CreateMailingLabel(CustomerID, ProductID);
    return File(mailingLabel.NoticeContents, "application/pdf");//we don't send 3.parameter yet
}

View.cshtml

<a asp-action="ExportMailingLabel"
   asp-controller="Product"
   asp-route-CustomerID="@Model.CustomerID"
   asp-route-ProductID="@Model.ProductID"
   asp-route-FileName="MailingLabel.pdf" class="btn btn-primary" id="btnOpenDocument">
    <i class="fa fa-receipt"></i> View Mailing Label
</a>

@section Scripts
{
    <script>
        //We are opening the file with js instead of action when click to the button
        $('#btnOpenDocument').click(function (e) {
            e.preventDefault();
            window.open('@Url.Action("ExportMailingLabel"
                             ,"Product"
                             ,new {customerId=selectedCustomerId
                                  ,productId=selectedProductId
                                  ,fileName="MailingLabel.pdf" })'
                        ,"_blank");
        });
    </script>
}

---

动态文件名用法

Controller.cs

//We are adding a new route to action for file name
[HttpGet("[controller]/[action]/{customerId}/{productId}/{fileName}")]
public async Task<IActionResult> ExportMailingLabel(int CustomerID, int ProductID) {
    var mailingLabel = await NoticeService.CreateMailingLabel(CustomerID, ProductID);
    return File(mailingLabel.NoticeContents, "application/pdf", $"{CustomerID}_{ProductID}.pdf");        
}

View.cshtml

<a asp-action="ExportMailingLabel"
   asp-controller="Product"
   asp-route-CustomerID="@Model.CustomerID"
   asp-route-ProductID="@Model.ProductID"
   asp-route-FileName="@(Model.CustomerID)_@(Model.ProductID).pdf" class="btn btn-primary" id="btnOpenDocument">
    <i class="fa fa-receipt"></i> View Mailing Label
</a>

@section Scripts
{
    <script>
        //We are opening the file with js instead of action when click to the button
        $('#btnOpenDocument').click(function (e) {
            e.preventDefault();
            window.open('@Url.Action("ExportMailingLabel"
                             ,"Product"
                             ,new {customerId=selectedCustomerId
                                  ,productId=selectedProductId
                                  ,fileName=selectedCustomerId+"_"+selectedProductId+".pdf" })'
                        ,"_blank");
        });
    </script>
}

FileContentResult Class