Answers

• allan Posts: 63,288Questions: 1Answers: 10,427 Site admin

  May 2022

  At the server-side you need to read the search[value] parameter that is sent to the server and apply that as the condition to your data source. I don't see any use of the search information submitted to the server-side in your C# code.

  Allan
• klee777 Posts: 12Questions: 2Answers: 0

  June 2022

  @allan Thank you for your prompt reply. I didn't know how but now I know and it's working.
• klee777 Posts: 12Questions: 2Answers: 0

  June 2022

  @allan When I added the DateTime column, its value is like, "/Date(1648785600000)" instead of any normal ISO format.
  

  Should I correct this at the server side or in the client side using render function?
• klee777 Posts: 12Questions: 2Answers: 0

  June 2022

  Except the incorrect Date display (/Date(1648785600000)), here is the solution for server-side searching to help someone who has the same problem.

  a javascript code:

          var table;
          $(document).ready(function () {
              table = $("#myTable").DataTable({
                  "processing": true,     // for show progress bar
                  "serverSide": true,     // for process server side
                  "filter": true,         // enable/disable search box
                  "orderMulti": false,    // enable/disable multiple columns at once
                  "ajax": {
                      "url": "/home/LoadData",
                      "type": "POST",
                      "datatype": "json"
                  },
                  "columns": [
                      { "data": "ID_ACCOUNT", "name": "Account #" },
                      { "data": "TXT_NAME", "name": "Customer" },
                      { "data": "TXT_COMPANY", "name": "Company" },
                      { "data": "DTE_NOTICE", "name": "Notice 1", "type": "date", "authwidth": true }
                      ]
              });
              $("input[aria-controls=myTable]").change(function () {
                  // The following call will invoke the ajax "url": "/home/LoadData" used in DataTable creation.
                  table.columns().search(this.value).draw();
              });
          });
  

  MVC controller:

          [HttpPost]
          public ActionResult LoadData()
          {
              ...
              string searchTerm = Request.Form.GetValues("search[value]").FirstOrDefault();
              using (BTEntities dc = new BTEntities())
              {
                  IQueryable<BT> v;
                  if (searchTerm == "")
                      v = (from item in dc.BT select item);
                  else
                  {
                      v = (from item in dc.BT
                              where (item.TXT_NAME.Contains(searchTerm) || item.TXT_COMPANY.Contains(searchTerm))
                              select item);
                  }
                  // sorting
                  if(sortColumnDir == "desc")
                      v = v.OrderByDescending(item => item.ID_ACCOUNT);
                  else
                      v = v.OrderBy(item => item.ID_ACCOUNT);
                  totalRecords = v.Count();
                  var data = v.Skip(skip).Take(pageSize).ToList();
                  return Json(new { draw = draw, recordsFiltered = totalRecords, recordsTotal = totalRecords, data = data }, JsonRequestBehavior.AllowGet);
              }
          }
  
• klee777 Posts: 12Questions: 2Answers: 0

  June 2022

  I decided to parse it in the client side, and here is the solution:

  "columnDefs": [
      {
          "targets": 5,
          "render": function (data, type, row) {
              if (data != null) {
                  // e.g. data="/Date(1648785601234)";
                  var idxLParen = data.indexOf("(");
                  var idxRParen = data.indexOf(")");
                  var miliString = data.substr(idxLParen + 1, idxRParen - idxLParen - 1);
                  var miliNum = parseInt(miliString);
                  var date = new Date(miliNum);
                  return date.toLocaleDateString('en-US');
              } else {
                  return "";  // this field can be null.
              }
          }
      }
  ],
  
• allan Posts: 63,288Questions: 1Answers: 10,427 Site admin

  June 2022

  Yes, that's the text representation of a .NET DateTime instance. Personally I would have the server return ISO8601 formatted strings rather than the .NET style string, but either will work.

  Allan
• klee777 Posts: 12Questions: 2Answers: 0

  June 2022

  @allan Thank you for your advice. I've tried to convert it on the server side, but don't know how to do it using the existing LINQ:

  v = (from item in dc.BT
       where (item.TXT_NAME.Contains(searchTerm) 
           || item.TXT_COMPANY.Contains(searchTerm))
       select item);
  

  Whatever I tried, I got the syntax error. So, I couldn't do it.

  I hope someone can show me the way.
• allan Posts: 63,288Questions: 1Answers: 10,427 Site admin

  June 2022

  For LINQ you'd need to ask on StackOverflow or a C# specific forum. I'm afraid I don't know enough about LINQ to help with that.

  Allan