我正在尝试学习MVC和Razor页面(我是Web开发新手)并且我在Post上有一个NullReferenceException,因为RouteData为null。我在Get上没有这个问题。页面正常加载,但只要单击“过滤器”按钮,就会显示例外情况。我甚至无法调试OnPostAsync,因为它甚至没有输入方法。这是我的页面:
<div class="row">
<div class="col-md-4">
<form method="post">
<div class="form-group">
<label asp-for="Input.UserName" class="control-label"></label>
<input asp-for="Input.UserName" class="form-control" />
</div>
<div class="form-group">
<label asp-for="Input.Email" class="control-label"></label>
<input asp-for="Input.Email" class="form-control" />
</div>
<div class="form-group">
<input type="submit" value="Filter" class="btn btn-default" />
</div>
</form>
</div>
</div>
<table class="table">
<thead>
<tr>
<th>
@Html.DisplayNameFor(model => model.UserList[0].UserName)
</th>
<th>
@Html.DisplayNameFor(model => model.UserList[0].Email)
</th>
</tr>
</thead>
<tbody>
@foreach (var item in Model.UserList)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.UserName)
</td>
<td>
@Html.DisplayFor(modelItem => item.Email)
</td>
</tr>
}
</tbody>
</table>
这是代码:
public class UsersModel : PageModel
{
[BindProperty]
public _userModel _UserModel { get; set; }
[BindProperty]
public InputModel Input { get; set; }
internal IList<_userModel> userList = new List<_userModel>();
public IList<_userModel> UserList { get => userList; set => userList = value; }
public class InputModel
{
[Display(Name = "Username")]
public string UserName { get; set; }
[Display(Name = "Email")]
public string Email { get; set; }
}
public async Task<IActionResult> OnGetAsync()
{
//Add all users to UserList
return Page();
}
public async Task<IActionResult> OnPostAsync()
{
//Filter UserList
return Page();
}
}
答案 0 :(得分:0)
发现了这个问题。我在页面上没有使用的模型上使用[BindProperty]
:
[BindProperty]
public _userModel _UserModel { get; set; }
我刚删除了[BindProperty]
并且已经解决了。