Open PDF files in SfPdfViewer for Blazor from various storage location
7 Oct 20247 minutes to read
You might need to open and view the PDF files from various location. In this section, you can find the information about how to open PDF files from URL, Cloud, database, local file system, and as base64 string.
Opening a PDF from remote URL
If you have your PDF files in the web, you can open it in the viewer using URL.
@using Syncfusion.Blazor.SfPdfViewer
<SfPdfViewer2 DocumentPath="@DocumentPath"
Height="100%"
Width="100%">
</SfPdfViewer2>
@code {
public string DocumentPath { get; set; } = "https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf";
}Opening a PDF from Cloud
You can open the PDF file from Cloud storage.
The following code example shows how to open and load the PDF file stored in Azure Blob Storage.
@using Azure.Storage.Blobs
@using Azure.Storage.Blobs.Specialized
@using System.IO;
@using Syncfusion.Blazor.SfPdfViewer
<SfPdfViewer2 DocumentPath="@DocumentPath"
Height="100%"
Width="100%"></SfPdfViewer2>
@code {
public string DocumentPath { get; set; }
protected override void OnInitialized()
{
//Connection String of Storage Account
string connectionString = "Here Place Your Connection string";
BlobServiceClient blobServiceClient = new BlobServiceClient(connectionString);
//Container Name
string containerName = "pdf-file";
//File Name to be loaded into Syncfusion SfPdfViewer
string fileName = "PDF_Succinctly.pdf";
BlobContainerClient blobContainerClient = blobServiceClient.GetBlobContainerClient(containerName);
BlockBlobClient blockBlobClient = blobContainerClient.GetBlockBlobClient(fileName);
MemoryStream memoryStream = new MemoryStream();
blockBlobClient.DownloadTo(memoryStream);
DocumentPath = "data:application/pdf;base64," + Convert.ToBase64String(memoryStream.ToArray());
}
}NOTE
The Azure.Storage.Blobs NuGet package must be installed in your application to use the previous code example.
@using Azure.Storage.Files.Shares
@using System.IO;
@using Syncfusion.Blazor.SfPdfViewer
<SfPdfViewer2 DocumentPath="@DocumentPath"
Width="100%"
Height="100%" />
@code {
public string DocumentPath { get; set; } = "wwwroot/data/PDF_Succinctly.pdf";
protected override void OnInitialized()
{
//Connection String of Storage Account
string connectionString = "Here Place Your Connection string";
string shareName = "pdfdocument";
//File Name to be loaded into Syncfusion SfPdfViewer
string filePath = "Hive_Succinctly.pdf";
ShareFileClient shareFileClient = new ShareFileClient(connectionString, shareName, filePath);
Stream stream = shareFileClient.OpenRead();
byte[] bytes;
using (var memoryStream = new MemoryStream())
{
stream.CopyTo(memoryStream);
bytes = memoryStream.ToArray();
}
DocumentPath = "data:application/pdf;base64," + Convert.ToBase64String(bytes);
}
}NOTE
The Azure.Storage.Files.Shares NuGet package must be installed in your application to use the previous code example.
Opening a PDF from database
The following code example shows how to open the PDF file in viewer from SQL Server database.
@using Syncfusion.Blazor.SfPdfViewer
<SfPdfViewer2 DocumentPath="@DocumentPath" Width="100%" Height="100%" />
@code {
public string DocumentPath { get; set; }
protected override void OnInitialized()
{
string documentID = "PDF Succinctly";
string connectionString = "Data Source=(LocalDB)\\MSSQLLocalDB;AttachDbFilename=C:\\Database.mdf;";
System.Data.SqlClient.SqlConnection connection = new System.Data.SqlClient.SqlConnection(connectionString);
//Searches for the PDF document from the database
string query = "select Data from Table where DocumentName = '" + documentID + "'";
System.Data.SqlClient.SqlCommand command = new System.Data.SqlClient.SqlCommand(query, connection);
connection.Open();
System.Data.SqlClient.SqlDataReader read = command.ExecuteReader();
read.Read();
//Reads the PDF document data as byte array from the database
byte[] byteArray = (byte[])read["Data"];
DocumentPath = "data:application/pdf;base64," + Convert.ToBase64String(byteArray);
}
}NOTE
The System.Data.SqlClient package must be installed in your application to use the previous code example. You need to modify the connectionString variable in the previous code example as per the connection string of your database.
Opening a PDF from file system
There is an UI option in built-in toolbar to open the PDF file from local file system. If you want to achieve the same functionality while designing your own toolbar, you can use the following code example to load and open the PDF file. In this sample, the Syncfusion’s Uploader control is used for Blazor.
@using Syncfusion.Blazor.Inputs
@using Syncfusion.Blazor.SfPdfViewer
<SfUploader ID="UploadFiles" AllowedExtensions=".pdf,.PDF">
<UploaderEvents OnUploadStart="onsuccess"></UploaderEvents>
<UploaderAsyncSettings SaveUrl="https://aspnetmvc.syncfusion.com/services/api/uploadbox/Save"
RemoveUrl="https://aspnetmvc.syncfusion.com/services/api/uploadbox/Remove">
</UploaderAsyncSettings>
</SfUploader>
<SfPdfViewer2 @ref="@Viewer"
Height="100%"
Width="100%">
</SfPdfViewer2>
@code {
SfPdfViewer2 Viewer;
public async void onsuccess(UploadingEventArgs action)
{
string filePath = action.FileData.RawFile.ToString();
await Viewer.LoadAsync(filePath, null);
}
}Opening a PDF from base64 data
The following code snippet explains how the PDF file can be loaded in SfPdfViewer as base64 string.
@using Syncfusion.Blazor.SfPdfViewer
<SfPdfViewer2 ID="viewer"
DocumentPath="@DocumentPath"
Height="100%"
Width="100%">
</SfPdfViewer2>
@code {
static byte[] byteArray = System.IO.File.ReadAllBytes("wwwroot/Data/PDF_Succinctly.pdf");
static string base64String = Convert.ToBase64String(byteArray);
public string DocumentPath { get; set; } = "data:application/pdf;base64," + base64String;
}Opening a PDF from stream
You can load a PDF file from stream in SfPdfViewer by converting the stream into a base64 string. The following code sample explains how the PDF file can be loaded in SfPdfViewer from stream.
@using Syncfusion.Blazor.SfPdfViewer
@using System.IO;
<SfPdfViewer2 ID="viewer"
DocumentPath="@DocumentPath"
Height="100%"
Width="100%">
</SfPdfViewer2>
@code{
public string DocumentPath { get; set; }
protected override void OnInitialized()
{
string filePath = "wwwroot/Data/PDF_Succinctly.pdf";
FileStream fileStream = new FileStream(filePath, System.IO.FileMode.Open, System.IO.FileAccess.Read);
MemoryStream stream = new MemoryStream();
fileStream.CopyTo(stream);
byte[] byteArray = stream.ToArray();
string base64String = Convert.ToBase64String(byteArray);
DocumentPath = "data:application/pdf;base64," + base64String;
}
}