RunQueryAsync.cs

private async Task<ActionResult> RunQueryAsync(SearchData model)
        {
            InitSearch();

            var parameters = new SearchParameters
            {
                // Enter content property names into this list so only these values will be returned.
                // If Select is empty, all values will be returned, which can be inefficient.
                Select = new[] { "Column1", "Column2", "ColumnN" }
            };

            try
            {
                model.resultList = await _indexClient.Documents.SearchAsync<Content>(model.searchText, parameters);
            }
            catch (Exception e)
            {
                throw new Exception(e.Message);
            }

            // Display the results.
            return View("Index", model);
        }