Blazor 项目获取 ProtocolException 运行时错误

在Blazor项目中，有时候我们可能会遇到ProtocolException运行时错误。这种错误通常是由于与服务器之间的通信出现问题而引起的。本文将介绍在Blazor项目中如何处理和解决ProtocolException运行时错误，并提供一个案例代码来帮助读者更好地理解。

csharp
@page "/fetchdata"
Weather forecast
This component demonstrates how to handle ProtocolException runtime error in a Blazor project.
@errorMessage
@code {
    private string errorMessage;
    protected override async Task OnInitializedAsync()
    {
        try
        {
            var httpClient = new HttpClient();
            var response = await httpClient.GetAsync("https://api.weather.com/forecast");
            response.EnsureSuccessStatusCode();
            var forecast = await response.Content.ReadAsStringAsync();
            // Process forecast data
        }
        catch (ProtocolException ex)
        {
            errorMessage = "An error occurred while communicating with the server. Please try again later.";
            // Log the error or perform additional error handling
        }
        catch (Exception ex)
        {
            errorMessage = "An error occurred. Please try again later.";
            // Log the error or perform additional error handling
        }
    }
}
public class ForecastDisplay : ComponentBase
{
    protected override void BuildRenderTree(RenderTreeBuilder builder)
    {
        builder.OpenElement(0, "p");
        builder.AddContent(1, "Display forecast here.");
        builder.CloseElement();
    }
}