Question

我正在使用ASP .Net MVC angular js，syncfusion grid。

当网格的数据流被过滤时会发生此错误，但如果未应用过滤器，则会发生此错误。我需要过滤网格，所以不过滤它是不可能的。

我的过滤器编码如下：

obj.filterColumn("ClientID", "equal", Id_ "and", true);

我的网格：

jQuery("#myGrid").ejGrid({
           dataSource: dataManager,
           columns: cols,
           allowSelection: true,
           enableAltRow: false,
           enableRowHover: true,
           isResponsive: true,
           allowSearching: true,
           selectionSettings: { selectionMode: ["row"] },
           allowFiltering: true,
           allowSorting: true,
           allowScrolling: true,
           allowResizeToFit: true,
           allowPaging: true,
           pageSettings: { pageSize: 12 },
           toolbarSettings: { showToolbar: true, toolbarItems: [ej.Grid.ToolBarItems.ExcelExport] },
           toolbarClick: function (e) {
               this.exportGrid = this["export"];
               if (e.itemName == "Excel Export") {
       
                   this.exportGrid('/MyController/ExportToExcel')
                   e.cancel = true;
               
           },

export js：

  var gridObj = $("#myGrid").data("ejGrid");
  gridObj.export(url);

控制器：

[System.Web.Http.ActionName("ExcelExport")]
        [AcceptVerbs("POST")]
        public void ExportToExcel()
        {
            string gridModel = HttpContext.Request.Params["GridModel"];
            GridProperties gridProperty = ConvertGridObject(gridModel);

            ExcelExport exp = new ExcelExport();
            var items = _svc.GetItems(someFilters);
            exp.Export(gridProperty, items, "Export.xlsx", ExcelVersion.Excel2010, false, false, "flat-saffron"); //the error i in this line
        }

堆栈跟踪：

[NullReferenceException: Object reference not set to an instance of an object.]
   Syncfusion.JavaScript.DataSources.DataOperations.PerformFiltering(IEnumerable dataSource, List`1 filteredColumns) +193
   Syncfusion.JavaScript.DataSources.DataOperations.Execute(IEnumerable dataSource, GridProperties property) +61
   Syncfusion.EJ.Export.GridExcelExport.ExecuteResult(GridProperties GridModel, Object dataSource) +431
   Syncfusion.EJ.Export.GridExcelExport.ExportHelper(GridProperties gridModel, Object dataSource) +777
   Syncfusion.EJ.Export.GridExcelExport.Export(GridProperties gridModel, Object dataSource, Boolean multipleExport) +20
   SwapZilla.Controllers.CollateralPostingController.ExportToExcel() in D:\Dev\MyProject\Controllers\MyController.cs:187
   System.Web.Mvc.<>c__DisplayClass1.<WrapVoidAction>b__0(ControllerBase controller, Object[] parameters) +15
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +252
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +34
   System.Web.Mvc.Async.<>c__DisplayClass42.<BeginInvokeSynchronousActionMethod>b__41() +33
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +56
   System.Web.Mvc.Async.<>c__DisplayClass39.<BeginInvokeActionMethodWithFilters>b__33() +76
   System.Web.Mvc.Async.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49() +370
   System.Web.Mvc.Async.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49() +370
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +57
   System.Web.Mvc.Async.<>c__DisplayClass2a.<BeginInvokeAction>b__20() +32
   System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +184
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +50
   System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +24
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +22
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +64
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +22
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +50
   System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +38
   System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +22
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +50
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +607
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +134

我确信网格中的列和项目的数据源是相同的，并且如果没有过滤gird，它会导出它。此外，有相同的行，但我不认为这很重要，因为我尝试导出行数不同于行的项目行，并导出很好。

我该如何纠正？

Answer 1

我检查了您的查询，但我无法重现报告的问题。请在下面找到示例链接

链接：http://www.syncfusion.com/downloads/support/forum/134986/ze/Exporting-743928412

如需检查，请提供以下详细信息，

分享您遇到的问题的屏幕截图/视频。
分享您正在使用的Syncfusion Essential工作室版本详细信息。
分享您正在使用的列详细信息。
分享您在网格中使用的适配器详细信息。
如果可能，请在上面附带的样本中重现该问题

NullReferenceException异常端口同步网格

1 个答案: