Return JSON file with ASP.NET Web API
Solution 1
Does the file already has valid JSON in it? If so, instead of calling File.ReadAllLines
you should call File.ReadAllText
and get it as a single string. Then you need to parse it as JSON so that Web API can re-serialize it.
public object Get()
{
string allText = System.IO.File.ReadAllText(@"c:\data.json");
object jsonObject = JsonConvert.DeserializeObject(allText);
return jsonObject;
}
This will:
- Read the file as a string
- Parse it as a JSON object into a CLR object
- Return it to Web API so that it can be formatted as JSON (or XML, or whatever)
Solution 2
I found another solution which works also if anyone was interested.
public HttpResponseMessage Get()
{
var stream = new FileStream(@"c:\data.json", FileMode.Open);
var result = Request.CreateResponse(HttpStatusCode.OK);
result.Content = new StreamContent(stream);
result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
return result;
}
Solution 3
I needed something similar, but IHttpActionResult (WebApi2) was required.
public virtual IHttpActionResult Get()
{
var result = new System.Net.Http.HttpResponseMessage(System.Net.HttpStatusCode.OK)
{
Content = new System.Net.Http.ByteArrayContent(System.IO.File.ReadAllBytes(@"c:\temp\some.json"))
};
result.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");
return ResponseMessage(result);
}
ojhawkins
Developer working in financial markets & studying CS.
Updated on September 02, 2020Comments
-
ojhawkins over 3 years
I am trying to return a JSON file using ASP.NET Web API (for testing).
public string[] Get() { string[] text = System.IO.File.ReadAllLines(@"c:\data.json"); return text; }
In Fiddler this does appear as a Json type but when I debug in Chrome and view the object it appears as and array of individual lines (left). The right image is what the object should look like when I am using it.
Can anyone tell me what I should return to achieve a Json result in the correct format?