public Presenter(Abstractions.IModel model, Abstractions.IView view)
{
this.model = model;
this.view = view;
this.view.OnTextChange += Display;
}
public async Task <IHtmlContent> InvokeAsync(Abstractions.IView view)
{
// We always need a view name to invoke
if (string.IsNullOrEmpty(view.ViewName))
{
throw new ArgumentNullException(nameof(view.ViewName));
}
var result = FindView(view.ViewName);
if (!result.Success)
{
throw new Exception($"A view with the name \"{view.ViewName}\" could not be found!");
}
// Log the invocation
if (_logger.IsEnabled(LogLevel.Information))
{
_logger.LogInformation($"Attempting to invoke partial view \"{view.ViewName}\".");
}
var builder = new HtmlContentBuilder();
using (var writer = new StringWriter())
{
// Render view
await RenderPartialViewAsync(writer, view.Model, ViewContext.ViewData, result.View);
// Write results
builder.WriteTo(writer, HtmlEncoder.Default);
// Return builder
return(builder.SetHtmlContent(writer.ToString()));
}
}
public async Task <IHtmlContent> InvokeAsync(Abstractions.IView view)
{
// We always need a view name to invoke
if (string.IsNullOrEmpty(view.ViewName))
{
throw new ArgumentNullException(nameof(view.ViewName));
}
if (!(_viewComponentHelper is DefaultViewComponentHelper helper))
{
throw new ArgumentNullException(
$"{_viewComponentHelper.GetType()} cannot be converted to DefaultViewComponentHelper");
}
// Contextualize view component
helper.Contextualize(ViewContext);
// Log the invocation
if (_logger.IsEnabled(LogLevel.Information))
{
_logger.LogInformation($"Attempting to invoke view component \"{view.ViewName}\".");
}
try
{
return(await _viewComponentHelper.InvokeAsync(view.ViewName, view.Model));
}
catch (Exception e)
{
if (_logger.IsEnabled(LogLevel.Error))
{
_logger.LogError(e,
$"An exception occurred whilst invoking the view component with name \"{view.ViewName}\". {e.Message}");
}
throw;
}
}
