MVC4 Website Making Tutorial Chapter 3 Delete User Group Action 3.4

1. Users
2. User groups
2.1 Browse user groups
2.2 Add User Groups
2.3 Modify user groups
2.4 Delete a user group

Deleting user groups is relatively simple. You don't need a separate page. When you browse the page and click Delete, a dialog box for confirming deletion will pop up. Click OK and delete it with jquery post.

Open "UserGroupController" and delete public ActionResult Delele (int GroupId) {return View ();}

Modify and delete processing Action [Delete (int Id)], modified code

/// <summary>
 ///  Delete a user group 
 /// </summary>
 /// <param name="Id"> User group Id</param>
 /// <returns></returns>
 [HttpPost]
 [AdminAuthorize]
 public JsonResult Delete(int Id)
 {
 userGroupRsy = new UserGroupRepository();
 if (userGroupRsy.Delete(Id)) return Json(true);
 else return Json(false);
 } 

Here, the return type is JsonResult for easy post deletion using jquery.

Open List. cshtml and change @ Html. ActionLink ("delete", "Delete", new {id = item. UserGroupId}) to read < a href="javascript:void(0)" onclick="Delete(@item.UserGroupId,'@item.Name')" > Delete < /a >

Add scripts at the bottom of the file

function Delete(id,name) {
 if (confirm(" Are you sure you want to delete " " + name + " "Is it? ")) {
 $.post("@Url.Content("~/UserGroup/Delete")", {Id:id}, function (data) {
 if (data) {
 alert(" Delete " " + name + " "Success! ");
 location.reload();
 }
 });
 }
 } 

When completed, the code for the entire List. cshtml is as follows:

@model IEnumerable<Ninesky.Models.UserGroup>

@{
 ViewBag.Title = " User group list ";
 Layout = "~/Views/Layout/_Manage.cshtml";
}
<div class="left">
 <div class="top"></div>
  Left side list 
</div>
<div class="split"></div>
<div class="workspace">
 <div class="inside">
 <div class="notebar">
 <img alt="" src="~/Skins/Default/Manage/Images/UserGroup.gif" /> User group list 
 </div>
 <div class="buttonbar">@Html.ActionLink(" Add a user group ", "Add", "UserGroup")  User group type: 
 @Html.DropDownList("GroupTypeList")
 </div>
 <table>
 <tr>
 <th>
 @Html.DisplayNameFor(model => model.Name)
 </th>
 <th>
 @Html.DisplayNameFor(model => model.Type)
 </th>
 <th>
 @Html.DisplayNameFor(model => model.Description)
 </th>
 <th></th>
 </tr>
 @foreach (var item in Model)
 {
 <tr>
 <td>
 @Html.DisplayFor(modelItem => item.Name)
 </td>
 <td>
 @Html.DisplayFor(modelItem => item.Type)
 </td>
 <td>
 @Html.DisplayFor(modelItem => item.Description)
 </td>
 <td>
 @Html.ActionLink(" Modify ", "Edit", new { id = item.UserGroupId }) |
 <a href="javascript:void(0)" onclick="Delete(@item.UserGroupId,'@item.Name')" > Delete </a>
 </td>
 </tr>
 }
 </table>
 </div>
</div>
<div class="clear"></div>
<script type="text/javascript">
 $("#GroupTypeList").change(function () {
 window.location.href = "/UserGroup/List/" + $(this).children("option:selected").val();
 })
 function Delete(id,name) {
 if (confirm(" Are you sure you want to delete " " + name + " "Is it? ")) {
 $.post("@Url.Content("~/UserGroup/Delete")", {Id:id}, function (data) {
 if (data) {
 alert(" Delete " " + name + " "Success! ");
 location.reload();
 }
 });
 }
 }
</script> 

Finish work here!