My approach involves directly formatting HTML (primarily for debugging purposes), though it can be enhanced to add more sophistication.
public static void FormatJSONObject(object obj, StringBuilder sb, int indent)
{
if(obj.GetType() == typeof(System.Object[]))
{
sb.AppendLine("[<br>");
int index = 0;
foreach(object item in (object[])obj)
{
sb.Append("<b><i>" + index + "</i></b><br><div style='padding-left: " + indent +
"em;'>");
FormatJSONObject(item, sb, indent + 2);
sb.AppendLine("</div>");
index++;
}
sb.AppendLine("]<br>");
}
else if(obj.GetType() == typeof(Dictionary<string, object>))
{
sb.AppendLine("{<br><div style='padding-left: " + indent + "em;'>");
foreach (var pair in (Dictionary<string, object>)obj)
{
sb.Append("<b>");
sb.Append(pair.Key);
sb.Append("</b> : ");
FormatJSONObject(pair.Value, sb, indent + 2);
}
sb.AppendLine("</div>}<br>");
}
else
{
sb.Append(obj.ToString());
sb.AppendLine("<br>");
}
}
This function is then called within the button click handler on the ASP server side...
protected void ProcessButtonClick(object sender, EventArgs e)
{
RegisterAsyncTask(new PageAsyncTask(LoadTestData));
}
public async Task LoadTestData()
{
using (HttpClient client = new HttpClient())
{
// Example URL: "http://jsonplaceholder.typicode.com"
client.BaseAddress = new Uri(APIURLBase.Text);
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("text/html"));
// Example endpoint: "posts/1"
HttpResponseMessage response = await client.GetAsync(APIURLRequest.Text);
if (response.IsSuccessStatusCode)
{
StringBuilder sb = new StringBuilder();
sb.AppendLine("<H1>Return Status:</H1> " + response.StatusCode.ToString() + "<br>");
sb.AppendLine("<H1>Headers</H1><br>");
foreach (var header in response.Headers)
{
foreach (var value in header.Value)
{
sb.AppendLine("<label>" + header.Key + "</label> " + value + "<br>");
}
}
sb.AppendLine("<H1>Content</H1><br>");
sb.AppendLine("<label>Content Type: </label>" + Response.ContentType + "<br>");
Stream memoryStream = new MemoryStream();
Stream bodyStream = await response.Content.ReadAsStreamAsync();
bodyStream.CopyTo(memoryStream);
memoryStream.Position = 0;
using (StreamReader reader = new StreamReader(memoryStream))
{
string responseBody = reader.ReadToEnd();
if (ShowRawContentCB.Checked)
{
sb.AppendLine(responseBody + "<br>");
}
else
{
JavaScriptSerializer serializer = new JavaScriptSerializer();
object jsonObj = serializer.Deserialize(responseBody, typeof(object));
FormatJSONObject(jsonObj, sb);
}
}
this.results.InnerHtml = sb.ToString();
}
else
{
this.results.InnerHtml = "<label>Error:</label> " + response.StatusCode.ToString();
}
}
}