Angular 6/C#/MVC 动态 return Json 来自控制器的结果 Json Array of Array

Question

我试图在 Angular 6 应用程序中将一些数据集导出到 Excel。为此，我正在使用 XLSX 和文件保存，如前所述： https://medium.com/@madhavmahesh/exporting-an-excel-file-in-angular-927756ac9857

问题是字段可能会不时更改，所以我需要一些动态的东西（不想指定列名）。为此，我找到了一个很好的例子： Binding Json data to a table in mvc 4

但是，我没有得到正确格式的数据。我需要像数组数组这样的东西。我假设 return 类型在那种情况下应该是 async Task<JsonResult> 但不确定如何让它工作。我附上了两张图片 - 我得到的结果

和预期结果

这是引用示例中的代码。对 GetMyData 的存储过程调用使用 SqlAdapter，无需指定字段名称

 public JsonResult GetValue()
    {
        JsonResult json = new JsonResult();
        DataSet ds = GetMyData(); 
       /*LoadDoctordetailsNew is method where i get data from database and convert
          to dataset.It returns a dataset*/
        string returnData = GetJson(ds.Tables[0]);
        json.JsonRequestBehavior = JsonRequestBehavior.AllowGet;
        json.Data = returnData;            
        return json;
    }

    public static string GetJson(DataTable dt)
    {
        System.Web.Script.Serialization.JavaScriptSerializer serializer =
           new System.Web.Script.Serialization.JavaScriptSerializer();
        List<Dictionary<string, object>> rows =
           new List<Dictionary<string, object>>();
        Dictionary<string, object> row = null;

        foreach (DataRow dr in dt.Rows)
        {
            row = new Dictionary<string, object>();
            foreach (DataColumn col in dt.Columns)
            {
                row.Add(col.ColumnName, dr[col]);
            }
            rows.Add(row);
        }
        return serializer.Serialize(rows);
    }

public static DataSet GetMyData()
        {
            try
            {
                using (SqlConnection connection = Connection.GetConnection())
                {
                  SqlDataAdapter da = new SqlDataAdapter("dbo.MySQLStoredproc", connection);
                    da.SelectCommand.CommandType = CommandType.StoredProcedure;
                    DataSet ds = new DataSet();
                    da.Fill(ds);
                    return ds;
                }
            }
            catch (Exception ex)
            {
                throw;
            }
        }

请多指教！

P.S.

此技术使用 Dapper。它 return 所需的数据（数组的数组）格式，但在对象中我们必须指定列名，这将是硬编码，因此，我不能使用

public static IEnumerable<Object> GetMyData()
        {

            var strQuery = @"[dbo].[Myproc]";        
            IEnumerable< Object > items = new List<Object>(0);
            var p = new DynamicParameters();

            using (SqlConnection con = Connection.GetConnection())
            {
                items = con.Query<Object>(strQuery, param: p, commandTimeout: 120, commandType: System.Data.CommandType.StoredProcedure);
            }
            return items;
        }

从 MVC 控制器调用

[HttpPost]
public async Task<JsonResult> SelectMyData()
{
    var task = Task.Run(() => Request.GetMyData());

    var retData = await task;
    return new JsonResult
    {
        ContentType = "application/json",
        Data = retData,
        JsonRequestBehavior = JsonRequestBehavior.AllowGet,
        MaxJsonLength = int.MaxValue
    };
}

Answer 1

您应该 return List<Dictionary<string, object>> 而不是 string。您不需要 Serialize JsonResult

会处理的数据

public JsonResult GetValue()
{
    JsonResult json = new JsonResult();
    DataSet ds = GetMyData(); 
   /*LoadDoctordetailsNew is method where i get data from database and convert
      to dataset.It returns a dataset*/
    json.Data = GetJson(ds.Tables[0]);
    json.JsonRequestBehavior = JsonRequestBehavior.AllowGet;
    return json;
}

public static List<Dictionary<string, object>> GetJson(DataTable dt)
{
    List<Dictionary<string, object>> rows =
       new List<Dictionary<string, object>>();
    Dictionary<string, object> row = null;

    foreach (DataRow dr in dt.Rows)
    {
        row = new Dictionary<string, object>();
        foreach (DataColumn col in dt.Columns)
        {
            row.Add(col.ColumnName, dr[col]);
        }
        rows.Add(row);
    }
    return rows;
}

Angular 6/C#/MVC 动态 return Json 来自控制器的结果 Json Array of Array

Angular 6/C#/MVC Dynamically return JsonResult from controller in form of Json Array of Array

c#

json

dataformat

async-await

angular