Blazor Server 與 WebAssembly：對比

Curtis Chau

更新:6月 1, 2025

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IronPDF 是否支援 Blazor Server 和 Blazor WebAssembly (WASM)？

IronPDF 支援 Blazor Server，但不支援 Blazor WebAssembly (WASM)。

要在 Blazor Server 中儲存 PDF，需要將 PDF 文件流轉換為位元組數組，然後將其傳遞給 JavaScript 函數以方便下載。

以下範例展示如何在 Blazor 伺服器應用程式中將 PDF 文件轉換為位元組數組，然後使用 JavaScript 觸發下載：

@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

以下是用於處理 PDF 下載的配套 JavaScript 函數。請確保將以下內容新增至您的_Host.cshtml或index.html檔案：

<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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