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Inferred picturefechingservice

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This commit is contained in:
Tommy Öman
2020-01-07 22:43:56 +01:00
parent 383a8720a0
commit 9a48724907
3 changed files with 49 additions and 9 deletions
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53
Blazor3State/Pages/FetchData.razor
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@ -1,7 +1,9 @@
@page "/fetchdata"
@using Blazor3State.Data
@inject WeatherForecastService ForecastService
@using System.IO
@inject IHttpClientFactory httpClientFactory
<h1>Showing states in blazor</h1>
@ -14,7 +16,7 @@
<div class="lds-default"><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div><div></div></div>
</Loading>
<Loaded>
<img src="https://loremflickr.com/200/300" alt="Alternate text" />
<img src="@imageData" alt="Alternate text" />
</Loaded>
<ErrorContent>
<p><em>An error has occurred. Click new image to try again !</em></p>
@ -25,21 +27,58 @@
@code {
Random random = new Random();
LoadingContainerState state;
string imageData;
protected override async Task OnInitializedAsync()
{
await LoadImage();
}
//async Task LoadImage()
//{
// state = LoadingContainerState.Loading;
// await Task.Delay(2000);
// if (random.Next(3) == 2)
// {
// state = LoadingContainerState.Error;
// }
// else state = LoadingContainerState.Loaded;
//}
async Task LoadImage()
{
state = LoadingContainerState.Loading;
await Task.Delay(2000);
if (random.Next(3) == 2)
{
state = LoadingContainerState.Error;
}
else state = LoadingContainerState.Loaded;
var request = new HttpRequestMessage(HttpMethod.Get, "https://loremflickr.com/400/500");
var client = httpClientFactory.CreateClient();
var response = await client.SendAsync(request);
if (response.IsSuccessStatusCode)
{
using var responseStream = await response.Content.ReadAsStreamAsync();
var header = response.Content.Headers.FirstOrDefault(x => x.Key == "Content-Type");
string imageType = header.Value.First();
string encodedImage;
using (MemoryStream m = new MemoryStream())
{
responseStream.CopyTo(m);
byte[] imageBytes = m.ToArray();
encodedImage = Convert.ToBase64String(imageBytes);
}
imageData = $"data:{imageType};base64,{encodedImage}";
state = LoadingContainerState.Loaded;
}
else
state = LoadingContainerState.Error;
}
}