AppStd/EnvelopeGenerator
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Fixed error while loading file

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This commit is contained in:
OlgunR
2025-12-09 08:57:39 +01:00
parent 562ceb9c3f
commit 4a7676765c
4 changed files with 136 additions and 27 deletions
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68
EnvelopeGenerator.ReceiverUIBlazor/Pages/Index.razor
View File

@@ -12,6 +12,11 @@
<button class="btn secondary" @onclick="Download" disabled="@(!HasPdf)">Download</button>
</div>
@if (!string.IsNullOrWhiteSpace(ErrorMessage))
{
<div class="error-banner">@ErrorMessage</div>
}
@if (!HasPdf)
{
<div class="drop-hint">Drop or select a PDF to start.</div>
@@ -96,6 +101,7 @@
private double StartLeft;
private double StartTop;
private string TextValue = "Text";
private string? ErrorMessage;
private bool HasPdf => !string.IsNullOrWhiteSpace(PdfBase64);
private int DisplayPage => PageIndex + 1;
@@ -117,22 +123,41 @@
private async Task HandleFileSelected(InputFileChangeEventArgs e)
{
if (e.FileCount == 0)
ErrorMessage = null;
try
{
return;
if (e.FileCount == 0)
{
return;
}
var file = e.File;
await using var stream = file.OpenReadStream(maxAllowedSize: 20 * 1024 * 1024);
using var ms = new MemoryStream();
await stream.CopyToAsync(ms);
PdfBase64 = Convert.ToBase64String(ms.ToArray());
// Show the canvas before we start rendering
await InvokeAsync(StateHasChanged);
await Task.Yield();
// Make sure pdf.js is ready
await JS.InvokeVoidAsync("pdfInterop.ensureReady");
var result = await JS.InvokeAsync<RenderResult>("pdfInterop.loadPdf", PdfBase64);
PageCount = result.Pages;
PageIndex = 0;
await RenderPage();
}
catch (Exception ex)
{
ErrorMessage = $"Fehler beim Laden der PDF: {ex.Message}";
PdfBase64 = null;
PageCount = 0;
PageIndex = 0;
}
var file = e.File;
await using var stream = file.OpenReadStream(maxAllowedSize: 20 * 1024 * 1024);
using var ms = new MemoryStream();
await stream.CopyToAsync(ms);
PdfBase64 = Convert.ToBase64String(ms.ToArray());
var result = await JS.InvokeAsync<RenderResult>("pdfInterop.loadPdf", PdfBase64);
PageCount = result.Pages;
PageIndex = 0;
await RenderPage();
}
private async Task RenderPage()
@@ -142,10 +167,17 @@
return;
}
var viewport = await JS.InvokeAsync<ViewportInfo>("pdfInterop.renderPage", PageIndex, "pdf-canvas", ViewportWidthPx);
ViewportWidthPx = viewport.Width;
ViewportHeightPx = viewport.Height;
StateHasChanged();
try
{
var viewport = await JS.InvokeAsync<ViewportInfo>("pdfInterop.renderPage", PageIndex, "pdf-canvas", ViewportWidthPx);
ViewportWidthPx = viewport.Width;
ViewportHeightPx = viewport.Height;
StateHasChanged();
}
catch (Exception ex)
{
ErrorMessage = $"Fehler beim Rendern: {ex.Message}";
}
}
private void Reset()