字典< short,字典< EnFunction,bool>>模型绑定不起作用 [英] Dictionary<short, Dictionary<EnFunction, bool>> model binding not work
问题描述
我无法将模型绑定到Controller.请给我任何建议. 模型,控制器和视图类如下.提交模型后,字典属性等于null.
I could not bind the model to Controller. Please give me any advice. Model,controller and view classes are below. When model is submmited, dictionary property equals to null.
public class GroupRights //model
{
public List<DtoGrup> groups { get; set; }
public Dictionary<short, Dictionary<EnFunction, bool>> groupRights { get; set; } // group function HasPermission
}
public enum EnFunction
{
LPDU_login,
LPDU_changePassword,
LPDU_transitList,
LPDU_PosEventList,
....
}
控制器
public ActionResult GroupRights()
{
TocCommonService.CommonServiceClient client = new TocCommonService.CommonServiceClient();
GroupRights gr = new GroupRights();
gr.groups = client.GetAllOperatorGroups().ToList();
gr.groupRights = new Dictionary<short, Dictionary<EnFunction, bool>>();
foreach (var g in gr.groups)
{
Dictionary<EnFunction, bool> permission = new Dictionary<EnFunction, bool>();
foreach (var func in Enum.GetValues(typeof(EnFunction)).Cast<EnFunction>())
{
permission.Add(func, client.hasPermission(new DtoGrup() { GROUPID = g.GROUPID }, func));
}
gr.groupRights.Add(g.GROUPID, permission);
}
return View(gr);
}
查看
@model TocWebApplication.Models.GroupRights
@{
int id = 0;
}
@using (Html.BeginForm("ChangePermissionOfGroup", "Home", FormMethod.Post))
{
<table>
<thead>
<tr>
<th></th>
@foreach (var gr in Model.groups)
{
<th>@gr.GROUPNAME (@gr.GROUPID)</th>
}
</tr>
</thead>
<tbody>
@foreach (var func in Enum.GetValues(typeof(EnFunction)).Cast<EnFunction>())
{
<tr>
<td>@(func.ToString())</td>
@for (int j = 0; j < Model.groups.Count(); j++)
{
<td>@Html.CheckBoxFor(model => model.groupRights[Model.groups[j].GROUPID][func])</td>
}
</tr>
}
</tbody>
</table>
<button type="submit" class="btn btn-primary">Save changes</button>
<button class="btn">Cancel</button>
}
推荐答案
对于除Dictionary以外的所有其他内容,其中Key
和Value
均为简单值类型(例如Dictionary<string, bool>
),DefaultModelBinder
要求名称/value属性采用的格式(根据您的情况)
For all but Dictionaries where both the Key
and Value
are simple value types (for example Dictionary<string, bool>
), the DefaultModelBinder
requires the name/value attributes to be in the format (in your case)
<input name="groupRights[0].Key" value="1" ... />
<input name="groupRights[0].Value[0].Key" value="LPDU_login" ... />
<input name="groupRights[0].Value[0].Value" value="True" ... />
<input name="groupRights[1].Key" value="2" ... />
<input name="groupRights[1].Value[0].Key" value="LPDU_changePassword" ... />
<input name="groupRights[1].Value[0].Value" value="False" ... />
没有HtmlHelper
方法可以生成正确的属性并绑定到groupRights
,您需要手动生成html.
There are no HtmlHelper
methods that can generate the correct attributes and to bind to your groupRights
you would need to generate the html manually.
相反,创建一个表示要在视图中显示的数据的视图模型.如果我正确地解释了这一点,则要显示一个表格,向下显示每个EnFunction
值和每个DtoGrup
并在每个单元格中显示一个复选框,以确定为每个DtoGrup
选择哪个EnFunction
.
Instead, create a view model(s) that represents the data you want to display in the view.If I have interpreted this correctly, you want to display a table displaying each EnFunction
value down, and each DtoGrup
across, and to display a checkbox in each cell to determine which EnFunction
is selected for each DtoGrup
.
public class GroupRightsVM // represents a table cell
{
public short GroupID { get; set; }
public bool IsSelected { get; set; }
}
public class RightsVM // represents a table row
{
public RightsVM()
{
Groups = new List<GroupRightsVM>()
}
public EnFunction Right { get; set; }
public List<GroupRightsVM> Groups { get; set; } // represents the cells in a row
}
public class PermissionsVM // Represents the table
{
public PermissionsVM()
{
Permissions = new List<RightsVM>()
}
public IEnumerable<string> Headings { get; set; } // represents the table headings
public List<RightsVM> Permissions { get; set; } // represents all rows
}
在视图中
<thead>
<tr>
<th></th>
@foreach(var heading in Model.Headings)
{
<th>@heading</th>
}
</tr>
</thead>
<tbody>
@for(int i = 0; i < Model.Rows.Count; i++)
{
<tr>
<td>
@Html.HiddenFor(m => m.Permissions[i].Right)
@Html.DisplayFor(m => m.Permissions[i].Right)
</td>
@for(int j = 0; j < Model.Permissions[i].Groups.Count; j++)
{
<td>
@Html.HiddenFor(m => m.Permissions[i].Groups[j].GroupID)
@Html.CheckboxFor(m => m.Permissions[i].Groups[j].IsSelected)
</td>
}
</tr>
}
</tbody>
在GET方法中,初始化PermissionsVM
的实例,并根据您的数据模型填充它,并将其传递给视图,例如
In the GET method, initialize an instance of PermissionsVM
and populate it based on your data models and pass it to the view, for example
var groups = client.GetAllOperatorGroups()
var model = new PermissionsVM();
model.Headings = groups.Select(x => String.Format("{0} {{1})", x.GROUPNAME, x.GROUPID));
foreach (var func in Enum.GetValues(typeof(EnFunction)).Cast<EnFunction>())
{
RightsVM r = new RightsVM();
r.Right = func;
foreach (var g in groups)
{
GroupRightsVM gr = new GroupRightsVM();
gr.GroupID = g.GROUPID;
gr.IsSelected = ...
r.Groups.Add(gr);
}
model.Persmissions.Add(r);
}
return View(model);
以及POST方法中
public ActionResult GroupRights(PermissionsVM model)
这篇关于字典< short,字典< EnFunction,bool>>模型绑定不起作用的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!