egwcorelib/EgwCoreLib.BlazorTest/Pages/TestPdfViewer.razor.cs

#if false
using CA.Blazor.Pdf;
using CA.Blazor.Pdf.Extensions;
#endif

using Microsoft.AspNetCore.Components;
using System.Net.Http.Headers;

namespace EgwCoreLib.BlazorTest.Pages
{
    public partial class TestPdfViewer
    {
        #region Public Fields

        public int CompoSel = 1;

        #endregion Public Fields

        #region Public Properties

        public string PdfBase64 { get; set; } = "";

        #endregion Public Properties

        #region Protected Properties

        protected string FileSel
        {
            get => fileSel;
            set
            {
                if (fileSel != value)
                {
                    fileSel = value;
                    ReloadData().ConfigureAwait(false);
                    StateHasChanged();
                }
            }
        }

        protected string HeightSel
        {
            get => heightSel;
            set
            {
                if (heightSel != value)
                {
                    heightSel = value;
                    StateHasChanged();
                }
            }
        }

        [Inject]
        protected NavigationManager NavMan { get; set; } = null!;

        #endregion Protected Properties

        #region Protected Methods

        protected override async Task OnInitializedAsync()
        {
            await ReloadData();
            await Task.Delay(1);
        }

        #endregion Protected Methods

        #region Private Properties

        private string fileSel { get; set; } = "File01.pdf";
        private string heightSel { get; set; } = "400px";

        private string baseUri = "";
        private string fileUrl = "";

        private Dictionary<string, string> heightList { get; set; } = new Dictionary<string, string>() { { "200", "200px" }, { "400", "400px" }, { "600", "600px" }, { "800", "800px" }, { "1000", "1000px" } };

        #endregion Private Properties

        #region Private Methods

        private async Task<string> GetBase64Pdf(string apiUrl)
        {
            using (var httpClient = new HttpClient())
            {
                httpClient.BaseAddress = new Uri(NavMan.BaseUri);

                // Make the API request to get the PDF content
                var response = await httpClient.GetAsync(apiUrl);

                if (response.IsSuccessStatusCode)
                {
                    // Convert the response content to Base64
                    var pdfBytes = await response.Content.ReadAsByteArrayAsync();
                    var base64String = Convert.ToBase64String(pdfBytes);
                    return $"data:application/pdf;base64,{base64String}";
                }
                else
                {
                    // Handle error scenarios based on your application needs For simplicity, we
                    // return an empty string in case of an error
                    return string.Empty;
                }
            }
        }

        private async Task ReloadData()
        {
            baseUri = NavMan.BaseUri;
            fileUrl = $"{baseUri}/test/{FileSel}";

#if false
            // Call the helper method to retrieve the Base64-encoded PDF content
            PdfBase64 = await GetBase64Pdf(apiUrl); 
#endif
        }

        #endregion Private Methods
    }
}