Javascript 如何在Jquery数据表中发送错误消息警报

我使用的是mvc格式的JQuery数据表。使用条件绑定JQuery数据表。但我不知道如何在其他条件下显示错误消息。我需要显示错误警报消息服务器端是客户端。我的示例代码：

 public ActionResult Action(string EmpNo)
        {
            if (condition)
            {
               // data table passing
            }
            else
            {
                //here how to show the error message client side or server side 
            }
         }

---

您可以返回JavascriptResult

像这样的东西

public ActionResult TestJavaScript() {
    string s = "$('#divResultText').html('JavaScript Passed');";
    return JavaScript(s);
}

---

您应该返回

JsonResult

，其中包含与DataTables的预期返回签名匹配的任意对象（或真实对象，如果您已经创建了一个）。比如：

var result = // do something, get a list of stuff etc

return new JsonResult {
    // `Data` is the thing that turns into your json response
    Data = new {
        error = result.Success ? "" : result.Message,
        fieldErrors = new bool[0], // just to fake an empty array
        data = new bool[0],
        aaData = result.Success ? result.Items.Select(o => new {
            //use arbitrary column names if you've specified them in config with `aoColumns` and `mDataProp`, see comment below
            OrderID = o.ID,
            ChannelID = o.Partner,
            ReferenceKey = o.PartnerReferenceKey,
            o.CustomerEmail,
            Status = o.Status.ToString(),
            Value = o.Total,
            CreatedOn = o.CreatedOn.ToString("yyyy-MM-dd HH:mm:ss"), // provide in interpretable format
        }) : (object) new bool[0], // must return an empty list in order for it to understand errors
        iTotalRecords = result.TotalCount,
        iTotalDisplayRecords = result.TotalCount, // should be different if filtering
        sEcho // this is provided by the request, not sure what it means...
    }
};

对于ajax响应中的自定义列名，您需要查看：

---

但我使用的是datatable，因此不可接受。我们在客户端使用jauery数据表，只需在datatable Format中发送错误即可

var result = // do something, get a list of stuff etc

return new JsonResult {
    // `Data` is the thing that turns into your json response
    Data = new {
        error = result.Success ? "" : result.Message,
        fieldErrors = new bool[0], // just to fake an empty array
        data = new bool[0],
        aaData = result.Success ? result.Items.Select(o => new {
            //use arbitrary column names if you've specified them in config with `aoColumns` and `mDataProp`, see comment below
            OrderID = o.ID,
            ChannelID = o.Partner,
            ReferenceKey = o.PartnerReferenceKey,
            o.CustomerEmail,
            Status = o.Status.ToString(),
            Value = o.Total,
            CreatedOn = o.CreatedOn.ToString("yyyy-MM-dd HH:mm:ss"), // provide in interpretable format
        }) : (object) new bool[0], // must return an empty list in order for it to understand errors
        iTotalRecords = result.TotalCount,
        iTotalDisplayRecords = result.TotalCount, // should be different if filtering
        sEcho // this is provided by the request, not sure what it means...
    }
};