Index
@page "/"
@inject IJSRuntime js
<h4>Example. How to download file in Blazor application.</h4>
<button @onclick="DownloadFile">Download</button>
@functions {
void DownloadFile() {
var text = "Hello, world!";
var bytes = System.Text.Encoding.UTF8.GetBytes(text);
FileUtil.SaveAs(js, "HelloWorld.txt", bytes);
}
}
namespace BlazorFiddleProject
{
using Microsoft.AspNetCore.Components.Builder;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.JSInterop;
using System.Threading.Tasks;
using System;
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
}
public void Configure(IComponentsApplicationBuilder app)
{
app.AddComponent<App>("app");
}
}
public static class FileUtil
{
public async static Task SaveAs(IJSRuntime js, string filename, byte[] data)
{
await js.InvokeAsync<object>(
"saveAsFile",
filename,
Convert.ToBase64String(data));
}
}
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width">
<title>BlazorFiddleProject</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css"/>
<style>
</style>
<script type="text/javascript">
function saveAsFile(filename, bytesBase64) {
var link = document.createElement('a');
link.download = filename;
link.href = "data:application/octet-stream;base64," + bytesBase64;
document.body.appendChild(link); // Needed for Firefox
link.click();
document.body.removeChild(link);
}
</script>
</head>
<body>
<app>Loading...</app>
<script src="_framework/blazor.webassembly.js"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.bundle.min.js"></script>
</body>
</html>
Add component
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