Question

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。当模型被子类化时，字典属性等于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>
}

Answer 1

除了Key和Value都是简单值类型（例如Dictionary<string, bool>）之外的所有字典，DefaultModelBinder都需要名称/值属性格式（在您的情况下）

<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您需要手动生成html的groupRights。

相反，创建一个表示要在视图中显示的数据的视图模型。如果我已正确解释这一点，则需要显示一个表格，显示每个EnFunction值，每个{ {1}}，并在每个单元格中显示一个复选框，以确定为每个DtoGrup选择的EnFunction。

DtoGrup

在视图中

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GET方法中，初始化<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>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

PermissionsVM

和POST方法

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);

字典<短，字典<enfunction，=“”bool =“”>＆gt;模型绑定不起作用

1 个答案: