MVC 5＆Jquery DataTables基于用户的列显示角色

Question

在MVC 5项目中使用Jquery数据表。还使用Datatables.MVC5助手，它使整个任务更容易，并且遵循this tutorial来帮助完成MVC服务器端处理。

我试图显示按钮列，即编辑|删除|作为基于用户角色的前两列。这些按钮会调用我的正常MVC控制器。

我可以创建按钮，我无法弄清楚如何处理角色检查。我之前的客户端使用Razor Syntax很容易，现在使用DataTable更加棘手。

我当前的表。

 $(function() { 
     assetListVM = { 
      dt: null, 
      init: function() { 
       dt = $('#assetdatatable').DataTable({ 
        "serverSide": true, 
        "processing": true, 
        "DisplayLength": 25, 
        "ajax": { 
         "type": "POST", // Required to change from 'GET' as this produced server error query string length too long. 
         "url": "@Url.Action("Get","Demo")", 
         "data": // Allows us to return extra data object to controller 
          function (d) { 
           d.excelExport = $("#excelExport").val(); 
          } 
        }, 
        "scrollY": viewheight, // Calculated to help ensure table is fitting max area of screen with out dropping off screen. 
        "colReorder": true, 
        "select": true, 
        "stateSave": true, 
        "dom": 'fBrtip', 
        "lengthMenu": [[25, 50, 100, 200, -1], [25, 50, 100, 200, "All"]], 
        "buttons": [ 
         "pageLength", 
         "copy", 
         "excel" 
         ], 
        "columns": [ 
// HERE I need to check user Role and choose if to display column or not. 
// I have tried Razor @if (User.IsInRole("Sausage")) { } 
         { 
          "title": "button column" 
          "data": "AssetID", 
          "className": 'details_button', 
          "render": function (AssetID) 
          { 
           return '<a class="btn-xs btn-primary glyphicon glyphicon-list-alt" href=/Demo/Details/' + AssetID +'></a>'; 
           } 
          }, 
         { "title": "AssetID", "data": "AssetID" }, 
         { "title": "SIM", "data": "SIM" }, 
         { "title": "IMEI", "data": "IMEI" }, 
         { "title": "Software", "data": "LoggedOnSoftware" }, 
         { "title": "Soft No", "data": "LoggedOnSoftwareVerNo" }, 
         { "title": "Last Reset", "data": "LastResetType" }, 
         { 
          "title": "Last Log", "data": "LastLogOnTime", 
          "render": function (LastLogOnTime) { 
           return (moment(LastLogOnTime).isValid()) ? moment(LastLogOnTime).format("DD MMM YY") : "-"; 
          } 
         } 
        ], 
        "order": [[2, 'asc']] 
       }); 
      } 
     } 

     // initialize the datatables 
     assetListVM.init(); 
    }); 

在列标题按钮栏我都试过剃刀语法，但并不像我以前的工作表为这是基于所有的HTML dummys项目。我可以发送一个具有当前用户角色的viewbag对象来查看，然后检查，我不知道如何执行表设置中的if/else decissions。

如果任何人有任何这样的事情的例子，我可以得到处理或可以指向我在正确的方向，这将不胜感激。

我已经搜索并检查了我发现的最接近的问题是this old one。

更新： 由于杰米

这里是基于当前的用户角色我新的工作代码，将隐藏第一列。

var RoleCheck = @(User.IsInRole("sausage") ? "true" : "false"); // new check for user role outside of Jquery DataTable function which will work. 
      $(function() { 
     assetListVM = { 
      dt: null, 
      init: function() { 
       dt = $('#assetdatatable').DataTable({ 
        "serverSide": true, 
        "processing": true, 
        "ajax": { 
         "type": "POST", // Required to change from 'GET' as this produced server error query string length too long. 
         "url": "@Url.Action("Get","Demo")", 
         "data": // Allows us to return extra data object to controller 
          function (d) { 
           d.excelExport = $("#excelExport").val(); 
          } 
        }, 
        "columnDefs": [ 
         { 
         "target": [0], 
         "visible": RoleCheck // new variable true or false based on user role. 
         } 
        ] 
        "columns": [ 
         { 
          "title": "button column" 
          "data": "AssetID", 
          "className": 'details_button', 
          "render": function (AssetID) 
          { 
           return '<a class="btn-xs btn-primary glyphicon glyphicon-list-alt" href=/Demo/Details/' + AssetID +'></a>'; 
           } 
          }, 
         { "title": "AssetID", "data": "AssetID" }, 
         { "title": "SIM", "data": "SIM" }, 
         { "title": "IMEI", "data": "IMEI" }, 
         { "title": "Software", "data": "LoggedOnSoftware" }, 
         { "title": "Soft No", "data": "LoggedOnSoftwareVerNo" }, 
         { "title": "Last Reset", "data": "LastResetType" }, 
         { 
          "title": "Last Log", "data": "LastLogOnTime", 
          "render": function (LastLogOnTime) { 
           return (moment(LastLogOnTime).isValid()) ? moment(LastLogOnTime).format("DD MMM YY") : "-"; 
          } 
         } 
        ], 
        "order": [[2, 'asc']] 
       }); 
      } 
     } 
     // initialize the datatables 
     assetListVM.init(); 
    }); 

Answer 1

您可能可以为该列添加columnDef并在其中设置可见性。

"columnDefs": [ 
     { 
      "targets": [ 0 ], //first column 
      "visible": @(User.IsInRole("Sausage") : ? "true" : "false") 
     } 
    ] 

设置变量而不是使用内联Razor代码。

var RoleCheck = @(User.IsInRole("Sausage") : ? "true" : "false"); 


"columnDefs": [ 
     { 
      "targets": [ 0 ], //first column 
      "visible": RoleCheck 
     } 
    ] 

https://datatables.net/examples/basic_init/hidden_columns.html