Blazor Server 与 WebAssembly：比较

Curtis Chau

已更新:六月 1, 2025

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IronPDF 是否支持 Blazor 服务器和 Blazor WebAssembly (WASM)？

IronPDF 支持 Blazor 服务器，但不支持 Blazor WebAssembly (WASM)。

要在 Blazor 服务器中保存 PDF，您需要将 PDF 文档流转换为字节数组，然后将其传递给 JavaScript 函数以便于下载。

以下是如何在 Blazor 服务器应用程序中将 PDF 文档转换为字节数组，然后使用 JavaScript 触发下载的示例：

@page "/pdfdownload"
@inject IJSRuntime JSRuntime

@* A button to download the PDF *@
<button @onclick="DownloadPDF">Download PDF</button>

@code {
    private async Task DownloadPDF()
    {
        // Create a PDF document using IronPDF (this is hypothetical code)
        var renderer = new IronPdf.HtmlToPdf();
        var pdfDocument = renderer.RenderHtmlAsPdf("<h1>Hello, World!</h1>");

        // Convert PDF document to a byte array
        byte[] pdfBytes = pdfDocument.BinaryData;

        // Call the JavaScript function to download the PDF
        await JSRuntime.InvokeVoidAsync("downloadFile", pdfBytes, "example.pdf");
    }
}

@page "/pdfdownload"
@inject IJSRuntime JSRuntime

@* A button to download the PDF *@
<button @onclick="DownloadPDF">Download PDF</button>

@code {
    private async Task DownloadPDF()
    {
        // Create a PDF document using IronPDF (this is hypothetical code)
        var renderer = new IronPdf.HtmlToPdf();
        var pdfDocument = renderer.RenderHtmlAsPdf("<h1>Hello, World!</h1>");

        // Convert PDF document to a byte array
        byte[] pdfBytes = pdfDocument.BinaryData;

        // Call the JavaScript function to download the PDF
        await JSRuntime.InvokeVoidAsync("downloadFile", pdfBytes, "example.pdf");
    }
}

'INSTANT VB TODO TASK: The following line could not be converted:
page "/pdfdownload" inject IJSRuntime JSRuntime * A button [to] download the PDF * <button onclick="DownloadPDF"> Download PDF</button> code
If True Then
'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'	private async Task DownloadPDF()
'	{
'		' Create a PDF document using IronPDF (this is hypothetical code)
'		var renderer = New IronPdf.HtmlToPdf();
'		var pdfDocument = renderer.RenderHtmlAsPdf("<h1>Hello, World!</h1>");
'
'		' Convert PDF document to a byte array
'		byte[] pdfBytes = pdfDocument.BinaryData;
'
'		' Call the JavaScript function to download the PDF
'		await JSRuntime.InvokeVoidAsync("downloadFile", pdfBytes, "example.pdf");
'	}
End If

$vbLabelText $csharpLabel

下面是处理 PDF 下载的 JavaScript 函数。确保将此内容包含在您的 _Host.cshtml 或 index.html 文件中：

<script>
    // Function to download a file from a byte array in JavaScript
    function downloadFile(fileBytes, fileName) {
        // Convert byte array to a Blob
        const blob = new Blob([fileBytes], { type: 'application/pdf' });

        // Create a link element for downloading the file
        const link = document.createElement('a');
        link.href = window.URL.createObjectURL(blob);
        link.download = fileName;

        // Append the link to the body, trigger it, and remove it afterwards
        document.body.appendChild(link); // Required for Firefox
        link.click();
        document.body.removeChild(link);
    }
</script>

<script>
    // Function to download a file from a byte array in JavaScript
    function downloadFile(fileBytes, fileName) {
        // Convert byte array to a Blob
        const blob = new Blob([fileBytes], { type: 'application/pdf' });

        // Create a link element for downloading the file
        const link = document.createElement('a');
        link.href = window.URL.createObjectURL(blob);
        link.download = fileName;

        // Append the link to the body, trigger it, and remove it afterwards
        document.body.appendChild(link); // Required for Firefox
        link.click();
        document.body.removeChild(link);
    }
</script>

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