如何在 Jqgrid MVC 中删除多行
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【中文标题】如何在 Jqgrid MVC 中删除多行【英文标题】:How to delete multiple rows in Jqgrid MVC 【发布时间】:2017-07-12 01:33:41 【问题描述】:我的视图由外部 javascript 而非视图本身显示。如何删除 jqgrid 中的多行?我有 multiselect
和 multiboxonly
set 等于 true。这是我的代码
视图(视图格式为“~/Scripts/TodoList.js”)
@
ViewBag.Title = "Index";
<h2>TodoList</h2>
<div>
<table id="grid"></table>
<div id="pager"
</div>
<link type="text/css" rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
<a href="javascript:void(0)" id="m1">Get Selected id's</a>
<link href="~/Content/themes/base/jquery-ui.css" rel="stylesheet" />
<link href="~/Content/jquery.jqGrid/ui.jqgrid.css" rel="stylesheet" />
<script src="~/Scripts/jquery-1.9.1.min.js" type="text/javascript"></script>
<script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
@*<script src="~/Scripts/jquery-1.12.4.min.js" type ="text/javascript"></script>*@
<script src="~/Scripts/i18n/grid.locale-en.js" type="text/javascript"></script>
<script src="~/Scripts/jquery.jqGrid.min.js" type="text/javascript"></script>
<script src="~/Scripts/TodoList.js" type="text/javascript"></script>
Todolist.js (Jqgrid)
/* File Created: February 17, 2017 */
$(function ()
$("#grid").jqGrid(
url: "/TodoList/GetTodoLists",
datatype: 'json',
mtype: 'Get',
colNames: ['Id', 'Task Name', 'Task Description', 'Target Date', 'Severity', 'Task Status'],
colModel: [
key: true, hidden: true, name: 'Id', index: 'Id', editable: true ,
key: false, name: 'TaskName', index: 'TaskName', editable: true ,
key: false, name: 'TaskDescription', index: 'TaskDescription', editable: true ,
key: false, name: 'TargetDate', id: "elem", index: 'TargetDate', editable: true, formatter: 'date', formatoptions: newformat: 'd/m/Y' ,
editoptions: dataInit: function (elem) $(elem).datepicker();
,
key: false, name: 'Severity', index: 'Severity', editable: true, edittype: 'select', editoptions: value: 'L': 'Low', 'M': 'Medium', 'H': 'High' ,
key: false, name: 'TaskStatus', index: 'TaskStatus', editable: true, edittype: 'select', editoptions: value: 'A': 'Active', 'I': 'InActive'],
pager: jQuery('#pager'),
rowNum: 10,
rowList: [10, 20, 30, 40],
height: '100%',
viewrecords: true,
// Bug Codes
// loadonce:true, //compulsory for search
//cellEdit: true, //inline edits
//cellsubmit: 'clientArray', //inline edit
caption: 'Todo List',
sortname: 'id',
sortorder: 'desc',
multiselect: true,
multiboxonly: true,
emptyrecords: 'No records to display',
jsonReader:
root: "rows",
page: "page",
total: "total",
records: "records",
repeatitems: false,
Id: "0"
,
autowidth: true,
).navGrid('#pager', edit: true, add: true, del: true, search: true, refresh: true , //search: true
// edit options
zIndex: 100,
url: '/TodoList/Edit',
closeOnEscape: true,
closeAfterEdit: true,
recreateForm: true,
afterComplete: function (response)
if (response.responseText)
alert(response.responseText);
,
// add options
zIndex: 100,
url: "/TodoList/Create",
closeOnEscape: true,
closeAfterAdd: true,
afterComplete: function (response)
if (response.responseText)
alert(response.responseText);
,
//delete options
zIndex: 100,
url: "/TodoList/Delete" + ,
closeOnEscape: true,
closeAfterDelete: true,
recreateForm: true,
msg: "Are you sure you want to delete this task?",
afterComplete: function (response)
if (response.responseText)
alert(response.responseText);
);
);
控制器
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Data;
using TodoListApplication.DBContext;
using TodoListApplication.Models;
namespace TodoListApplication.Controllers
public class TodoListController : Controller
//
// GET: /TodoList/
public ActionResult Index()
return View();
TodoContext db = new TodoContext();
public JsonResult GetTodoLists(string sidx, string sord, int page, int rows) //Gets the todo Lists.
int pageIndex = Convert.ToInt32(page) - 1;
int pageSize = rows;
var todoListsResults = db.TodoLists.Select(
a => new
a.Id,
a.Severity,
a.TargetDate,
a.TaskDescription,
a.TaskName,
a.TaskStatus
);
int totalRecords = todoListsResults.Count();
var totalPages = (int)Math.Ceiling((float)totalRecords / (float)rows);
if (sord.ToUpper() == "DESC")
todoListsResults = todoListsResults.OrderByDescending(s => s.TaskName);
todoListsResults = todoListsResults.Skip(pageIndex * pageSize).Take(pageSize);
else
todoListsResults = todoListsResults.OrderBy(s => s.TaskName);
todoListsResults = todoListsResults.Skip(pageIndex * pageSize).Take(pageSize);
var jsonData = new
total = totalPages,
page,
records = totalRecords,
rows = todoListsResults
;
return Json(jsonData, JsonRequestBehavior.AllowGet);
// TODO:insert a new row to the grid logic here
[HttpPost]
public string Create([Bind(Exclude = "Id")] TodoList objTodo)
string msg;
try
if (ModelState.IsValid)
db.TodoLists.Add(objTodo);
db.SaveChanges();
msg = "Saved Successfully";
else
msg = "Validation data not successful";
catch (Exception ex)
msg = "Error occured:" + ex.Message;
return msg;
public string Edit(TodoList objTodo)
string msg;
try
if (ModelState.IsValid)
db.Entry(objTodo).State = EntityState.Modified;
db.SaveChanges();
msg = "Saved Successfully";
else
msg = "Validation data not successfull";
catch (Exception ex)
msg = "Error occured:" + ex.Message;
return msg;
public string Delete(int Id)
TodoList todolist = db.TodoLists.Find(Id);
db.TodoLists.Remove(todolist);
db.SaveChanges();
return "Deleted successfully";
【问题讨论】:
【参考方案1】:jqGrid 在multiselect: true
模式下删除行时发送逗号分隔的 id 列表。因此,您应该将string Delete(int Id)
更改为void Delete(string id)
。对应的代码大概如下:
public void Delete(string id)
var ids = id.Split(',');
foreach (var id in ids)
TodoList todolist = db.TodoLists.Find(int.Parse(id));
db.TodoLists.Remove(todolist);
db.SaveChanges();
我建议您也考虑使用loadonce: true
选项并简化您一次性返回所有 项。这是显示少量行(例如少于 1000)的最佳方案。它将简化您的服务器代码并提高网格的性能(责任)。
我建议您另外验证您是否使用最新版本的free jqGrid(您可以从NuGet 下载或直接从CDN 加载)。您应该查看您使用的 jqGrid 选项,并删除不需要或错误的选项/参数。
【讨论】:
它说“对象引用未设置为对象的实例”。故障排除提示建议我使用 new 关键字来创建对象实例。我的 jqgrid 也是最新版本。 @Jesse:这是您在 C# 代码(服务器端代码)或 JavaScript 代码(客户端代码)中得到的错误。您在代码的哪一行收到错误?可能您需要将csvIds
参数重命名为 id
(请参阅我的答案的更新代码)?
抱歉回复晚了。它是 C# 代码,即使我将“csvIds”重命名为 id,输出仍然是名称。我还调试了代码,结果“字符串 id”参数没有收到任何值...
嗨@Oleg,我已经设法解决了我的问题。事实证明,您的方法有效,只是控制器传递的 id 名称与我在删除方法参数中指定的 id 不相符。非常感谢! :) 我会在我的回答中附上详细的解释。
@Jesse:不客气!很高兴问题现在解决了。【参考方案2】:
在@Oleg 代码的帮助下,我已经解决了我的问题。
第一个: 我发现我的控制器用来传递 id 的 id 名称是“id”,而我的控制器中的删除方法是“Id”:
public string Delete(int Id) // < see this
TodoList todolist = db.TodoLists.Find(Id);
db.TodoLists.Remove(todolist);
db.SaveChanges();
return "Deleted successfully";
click here to see the debug result, pay attention to Form Data Section
所以控制器指定的 id 和我在删除方法中指定的 id 之间存在名称不匹配
第二: 所以我将控制器中的删除方法修改为:
public ActionResult Delete(string id)
var ids = id.Split(',');
foreach (var idsss in ids)
TodoList todolist = db.TodoLists.Find(int.Parse(idsss));
db.TodoLists.Remove(todolist);
db.SaveChanges();
var result = new msg = "Deletion Successful ! " ;
return Json(result, JsonRequestBehavior.AllowGet);
现在它可以工作了,感谢@Oleg!
【讨论】:
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