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我正在使用ASP.NET MVC 4和C#。我通過從數據庫中檢索數據編寫代碼來顯示webgrid中的數據。有效。但是,如果有任何不良情況像數據庫中斷或某些事情,它將無法檢索數據,所以我希望webgrid返回空列表或顯示「沒有員工數據」,而不是拋出錯誤。我在webgrid中添加了if語句,這似乎不起作用。它仍然拋出錯誤:mvc 4 - 如何從webgrid返回空列表,而不是拋出錯誤
"A data source must be bound bfore this operation can be performed."
希望你能幫助解決像下面我的代碼:
EmployeeController:
var employees = (IEnumerable<Employees>)Session["Employees"] ?? EmployeeService.LoadEmployees(Guid.Empty, string.Empty, null, null, string.Empty, "Error");
index.chstml
@grid.GetHtml(
htmlAttributes: new { id = "grid" },
columns: grid.Columns(
grid.Column(columnName: "ConvertedId", header: "Employee ID", format: (item) => string.IsNullOrEmpty(item.ConvertedId)?string.Empty:item.ConvertedId),
grid.Column(columnName: "Employee Code", header: "Vendor Name", format: (item) => string.IsNullOrEmpty(item.EmployeeCode)?string.Empty:item.EmployeeCode),
grid.Column(columnName: "Date", header: "Date", format: (item) => string.IsNullOrEmpty(item.Date.ToString())?string.Empty:item.Date.ToString()),
grid.Column(columnName: "Status", header: "Status", format: (item) => string.IsNullOrEmpty(item.Status)?string.Empty:item.Status),
))