How to solve search text filter issue in ASP.NET core?

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ASP.NET

ASP.NET-Core

I am currently migration from asp.net to asp.net core. As i am going on with it i have an issue where my field search which is a feature is not working. (It hits to the break point but then does not fetch the data from the json result.)

Please help me with this issue.

What I have tried:

public JsonResult GetFieldByName(string searchText)
        {
            Share.Log("Dec field Controller -> GetFieldByName -> Start");
            bool isSuccess = false;
            List<hk_field> fieldList = new List<hk_field>();
            string message = string.Empty;
            try
            {
                fieldList = _adapter.GetFieldsByName(searchText);
                isSuccess = true;
            }
            catch (Exception ex)
            {
                Share.Log("Dec field Controller -> GetFieldByName -> " + ex.Message, Share.MESSAGE_TYPE_ERROR);
                message = ex.Message;
            }
            Share.Log("Dec field Controller -> GetFieldByName -> End");
            return Json(new { type = StatusType.Success.ToDescription(), message = message.ToString(), isSuccess = isSuccess, data = fieldList });
        }