Select from multiple tables in one call

Question

In my code I have a page that includes information from 3 different tables. To show this information I make 3 SQL select calls and unite them in one list to pass as Model to my

Answer 1

May be this can helpful to you.

Select the three tables in a single procedure as a separate result sets, and then in the C# side get the result sets and convert it into JSON format, and then from the JSON you can get the each table data into your list.

DataSet dataSet = new DataSet("dataSet");
dataSet.Namespace = "NetFrameWork";
DataTable table = new DataTable();
DataColumn idColumn = new DataColumn("id", typeof(int));
idColumn.AutoIncrement = true;

DataColumn itemColumn = new DataColumn("item");
table.Columns.Add(idColumn);
table.Columns.Add(itemColumn);
dataSet.Tables.Add(table);

for (int i = 0; i < 2; i++)
{
    DataRow newRow = table.NewRow();
    newRow["item"] = "item " + i;
    table.Rows.Add(newRow);
}

dataSet.AcceptChanges();

string json = JsonConvert.SerializeObject(dataSet, Formatting.Indented);

Console.WriteLine(json);


//{
     // "Table1": [
     //   {
      //    "id": 0,
     //     "item": "item 0"
     //   },
     //   {
     //    "id": 1,
     //     "item": "item 1"
     //   }
     //  ]
    //"Table2": [
      //  {
       //   "id": 0,
       //   "item": "item 0",
         // "rate": 200.00
       // },
       // {
        // "id": 1,
        //  "item": "item 1",
        //   "rate": 225.00
        //}
      // ]

   // "Table3": [
       // {
       //   "id": 0,
       //   "item": "item 0",
       //   "rate": 200.00,
       //   "UOM" : "KG"
       // },
       // {
       //  "id": 1,
       //   "item": "item 1",
       //    "rate": 225.00,
       //   "UOM" : "LTR"
       // }
      // ]
     //}