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C# 在ASP.net中使用多对多关系

c# asp.net-mvc entity-framework

C# 在ASP.net中使用多对多关系,c#,asp.net-mvc,entity-framework,many-to-many,C#,Asp.net Mvc,Entity Framework,Many To Many,我尝试使用多对多关系，我成功地编辑和显示了一个客户（代码中的“客户”名称），但我无法创建。 在我的示例中，一个客户（客户）可以是一个或多个社会的一部分。 通过逐步使用VisualStudio，我注意到我的值无法传递到第一个“创建”函数和第二个“创建”函数。我成功地获得了我想要的字段，但无法发布它们。 我的客户控制器： public ActionResult Create() { var cli = new ClientViewModel {

我尝试使用多对多关系，我成功地编辑和显示了一个客户（代码中的“客户”名称），但我无法创建。 在我的示例中，一个客户（客户）可以是一个或多个社会的一部分。 通过逐步使用VisualStudio，我注意到我的值无法传递到第一个“创建”函数和第二个“创建”函数。我成功地获得了我想要的字段，但无法发布它们。 我的客户控制器：

public ActionResult Create()
    {
        var cli = new ClientViewModel
        {
            Client = new Client()

        };

        var allSocietesList = db.Societes.ToList();

cli.AllSocietes = allSocietesList.Select(o => new SelectListItem
        {
            Text = o.Nom,
            Value = o.ID.ToString()
        });

        ViewBag.StatutClientID = new SelectList(db.StatutClients, "ID", "Designation");
        return View(cli);
    }

    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create(ClientViewModel client) //Here is where the value dosesn't pass, "client" value is null;
    {
        if (ModelState.IsValid)
        {

            var cliToAdd = new Client();
            var updatedSocietes = new HashSet<int>(client.SelectedSociete);
            foreach (Societe societe in db.Societes)
            {
                if (updatedSocietes.Contains(societe.ID))
                {
                    cliToAdd.Societes.Add((societe));
                }

            }
            db.Clients.Add(cliToAdd);
            db.Entry(cliToAdd).State = System.Data.Entity.EntityState.Added;

            db.SaveChanges();


            return RedirectToAction("Index");
        }
        ViewBag.StatutClientID = new SelectList(db.StatutClients, "ID", "Designation", client.Client.StatutClientID);
            return View(client);

}

namespace CRM.ViewModels
{
public class ClientViewModel
{
    public Client Client { get; set; }
    public IEnumerable<SelectListItem> AllSocietes { get; set; }

    private List<int> selectedSociete;
    public List<int> SelectedSociete
    {
        get
        {
            if (selectedSociete == null)
            {
                selectedSociete = Client.Societes.Select(m => m.ID).ToList();
            }
            return selectedSociete;
        }
        set { selectedSociete = value; }
    }
}
}

public ActionResult Create（）
{
var cli=新的ClientViewModel
{
客户机=新客户机（）
};
var allsocietestlist=db.Societes.ToList（）；
cli.AllSocietes=allSocietesList.Select（o=>new SelectListItem
{
Text=o.Nom，
值=o.ID.ToString（）
});
ViewBag.statitClientId=新的选择列表（db.statitClients，“ID”，“Designation”）；
返回视图（cli）；
}
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create（ClientViewModel client）//这里是值dosesn不能传递的地方，“client”值为null；
{
if（ModelState.IsValid）
{
var cliToAdd=新客户端（）；
var updatedSocietes=新哈希集（client.SelectedSociete）；
foreach（法国兴业银行）
{
if（更新的Societes.Contains（societe.ID））
{
cliToAdd.Societes.添加（（societe））；
}
}
db.Clients.Add（cliToAdd）；
db.Entry（cliToAdd.State=System.Data.Entity.EntityState.Added；
db.SaveChanges（）；
返回操作（“索引”）；
}
ViewBag.statitClientId=新的选择列表（db.statitClients，“ID”，“Designation”，client.client.statitClientId）；
返回视图（客户端）；
}
现在是我的客户模型：

namespace CRM.Models
{
public class Client : Personne // Héritage de la classe Personne
{
    public Client()
    {
        this.Societes= new HashSet<Societe>();
    }

    [Column("StatutClientID")]

    public int StatutClientID { get; set; }

    public string Fonction { get; set; } // TODO:Type enum

    [Display(Name = "Est Actif ?")]
    public bool IsActif { get; set; }

    [DataType(DataType.MultilineText)]
    public string Commentaire { get; set; }

    public string Fax { get; set; }

    public virtual StatutClient StatutClient { get; set; }

    public virtual ICollection<Societe> Societes { get; set; }
    override public string ToString()
    {
        return this.Prenom+" "+this.Nom;
    }

   }

  }    

namespace CRM.Models
{
公共类客户：Personne//Héritage de la classe Personne
{
公共客户机（）
{
this.Societes=newhashset（）；
}
[列（“StatitClientID”）]
public int StatutClientID{get；set；}
公共字符串函数{get；set；}//TODO:类型枚举
[显示（Name=“Est Actif？”）]
公共bool IsActif{get；set；}
[数据类型（DataType.multilitext）]
公共字符串注释{get；set；}
公共字符串传真{get；set；}
公共虚拟StateTClient StateTClient{get；set；}
公共虚拟ICollection Societes{get；set；}
重写公共字符串ToString（）
{
返回此.Prenom+“”+this.Nom；
}
}
}
我在控制器中使用的类视图模型：

public ActionResult Create()
    {
        var cli = new ClientViewModel
        {
            Client = new Client()

        };

        var allSocietesList = db.Societes.ToList();

cli.AllSocietes = allSocietesList.Select(o => new SelectListItem
        {
            Text = o.Nom,
            Value = o.ID.ToString()
        });

        ViewBag.StatutClientID = new SelectList(db.StatutClients, "ID", "Designation");
        return View(cli);
    }

    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create(ClientViewModel client) //Here is where the value dosesn't pass, "client" value is null;
    {
        if (ModelState.IsValid)
        {

            var cliToAdd = new Client();
            var updatedSocietes = new HashSet<int>(client.SelectedSociete);
            foreach (Societe societe in db.Societes)
            {
                if (updatedSocietes.Contains(societe.ID))
                {
                    cliToAdd.Societes.Add((societe));
                }

            }
            db.Clients.Add(cliToAdd);
            db.Entry(cliToAdd).State = System.Data.Entity.EntityState.Added;

            db.SaveChanges();


            return RedirectToAction("Index");
        }
        ViewBag.StatutClientID = new SelectList(db.StatutClients, "ID", "Designation", client.Client.StatutClientID);
            return View(client);

}

namespace CRM.ViewModels
{
public class ClientViewModel
{
    public Client Client { get; set; }
    public IEnumerable<SelectListItem> AllSocietes { get; set; }

    private List<int> selectedSociete;
    public List<int> SelectedSociete
    {
        get
        {
            if (selectedSociete == null)
            {
                selectedSociete = Client.Societes.Select(m => m.ID).ToList();
            }
            return selectedSociete;
        }
        set { selectedSociete = value; }
    }
}
}

namespace CRM.ViewModels
{
公共类ClientViewModel
{
公共客户端{get；set；}
公共IEnumerable AllSocietes{get；set；}
私人名单选择兴业银行；
公众名单选择兴业银行
{
得到
{
如果（selectedSociete==null）
{
selectedSociete=Client.Societes.Select（m=>m.ID.ToList（）；
}
返回所选兴业银行；
}
设置{selectedSociete=value；}
}
}
}
最后，我的观点是：

@model CRM.ViewModels.ClientViewModel

@{
ViewBag.Title = "Create";
}

<h2>Create</h2>


@using (Html.BeginForm())
{
@Html.AntiForgeryToken()

<div class="form-horizontal">
    <h4>Client</h4>
    <hr />
    @Html.ValidationSummary(true, "", new { @class = "text-danger" })

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Nom, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Nom, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Nom, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Prenom, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Prenom, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Prenom, "", new { @class = "text-danger" })
        </div>
    </div>


    <div class="form-group">
        @Html.LabelFor(model => model.Client.Fonction, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Fonction, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Fonction, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Commentaire, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Commentaire, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Commentaire, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Telephone, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Telephone, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Telephone, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Mobile, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Mobile, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Mobile, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Fax, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Fax, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Fax, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Mail, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Mail, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Mail, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.IsActif, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            <div class="checkbox">
                @Html.EditorFor(model => model.Client.IsActif)
                @Html.ValidationMessageFor(model => model.Client.IsActif, "", new { @class = "text-danger" })
            </div>
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.StatutClientID, "StatutClient", htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.DropDownList("StatutClientID", null, htmlAttributes: new { @class = "form-control" })
            @Html.ValidationMessageFor(model => model.Client.StatutClientID, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.AllSocietes, "JobTag", new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.ListBoxFor(model => model.SelectedSociete,     Model.AllSocietes)
        </div>
    </div>

    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" value="Create" class="btn btn-default" />
        </div>
    </div>
</div>
}

<div>
@Html.ActionLink("Retour à la liste", "Index")
</div>

@section Scripts {
@System.Web.Optimization.Scripts.Render("~/bundles/jqueryval")
}

@model CRM.ViewModels.ClientViewModel
@{
ViewBag.Title=“创建”；
}
创造
@使用（Html.BeginForm（））
{
@Html.AntiForgeryToken（）
客户


@Html.ValidationSummary（true，“，new{@class=“text danger”}）
@LabelFor（model=>model.Client.Nom，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Client.Nom，new{htmlAttributes=new{@class=“form control”}}）
@Html.ValidationMessageFor（model=>model.Client.Nom，“，new{@class=“text danger”}）
@LabelFor（model=>model.Client.Prenom，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Client.Prenom，new{htmlAttributes=new{@class=“form control”}}）
@Html.ValidationMessageFor（model=>model.Client.Prenom，“，new{@class=“text danger”}）
@LabelFor（model=>model.Client.Fonction，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Client.Fonction，new{htmlAttributes=new{@class=“form control”}}）
@Html.ValidationMessageFor（model=>model.Client.Fonction，“，new{@class=“text danger”}）
@LabelFor（model=>model.Client.Commentaire，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Client.Commentaire，new{htmlAttributes=new{@class=“form control”}}）
@Html.ValidationMessageFor（model=>model.Client.Commentaire，”，新的{@class=“text danger”}）
@LabelFor（model=>model.Client.Telephone，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Client.Telephone，new{htmlAttributes=new{@class=“form control”}）
@Html.ValidationMessageFor（model=>model.Client.Telephone，“，new{@class=“text danger”}）
@LabelFor（model=>model.Client.Mobile，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Client.Mobile，new{htmlAttributes=new{@class=“form control”}}）
@Html.ValidationMessageFor（model=>model.Client.Mobile，“，new{@class=“text danger”}）
@LabelFor（model=>model.Client.Fax，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.Client.Fax，new{htmlAttributes=new{@class=“form control”}）
@Html.ValidationMessageFor（model=>model.Client.Fax，“，new{@class=“text danger”}）
@LabelFor（model=>model.Client.Mail，htmlA

  @model CRM.ViewModels.ClientViewModel

@{
ViewBag.Title = "Edit";
}

<h2 class="well">Clients - Edit</h2>

@using (Html.BeginForm())
{
@Html.AntiForgeryToken()

<div class="form-horizontal">
    @Html.ValidationSummary(true, "", new { @class = "text-danger" })
    @Html.HiddenFor(model => model.Client.ID)

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Fonction, htmlAttributes: new {  @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Fonction, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Fonction, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Commentaire, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Commentaire, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Commentaire, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Nom, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Nom, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Nom, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Prenom, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Prenom, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Prenom, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Telephone, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Telephone, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Telephone, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Mobile, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Mobile, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Mobile, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Fax, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Fax, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Fax, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.Mail, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.EditorFor(model => model.Client.Mail, new { htmlAttributes = new { @class = "form-control" } })
            @Html.ValidationMessageFor(model => model.Client.Mail, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.Client.IsActif, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            <div class="checkbox">
                @Html.EditorFor(model => model.Client.IsActif)
                @Html.ValidationMessageFor(model => model.Client.IsActif, "", new { @class = "text-danger" })
            </div>
        </div>
    </div>


    <div class="form-group">
        @Html.LabelFor(model => model.Client.StatutClientID, "Client.StatutClientID", htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.DropDownListFor(m => m.Client.StatutClientID,
                    (SelectList)ViewBag.StatutClientID,
                    Model.Client.StatutClient.ID);

            @*Html.DropDownList("Client.StatutClientID", null, htmlAttributes: new { @class = "form-control" })*@
            @Html.ValidationMessageFor(model => model.Client.StatutClientID, "", new { @class = "text-danger" })
        </div>
    </div>

    <div class="form-group">
        @Html.LabelFor(model => model.AllSocietes, "JobTag", new { @class = "control-label col-md-2" })
        <div class="col-md-10">
            @Html.ListBoxFor(m => m.SelectedSociete, Model.AllSocietes)
        </div>
    </div>

    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" value="Save" class="btn btn-default" />
        </div>
    </div>
</div>
}

<div>
@Html.ActionLink("Retour à la liste", "Index")
</div>

@section Scripts {
@System.Web.Optimization.Scripts.Render("~/bundles/jqueryval")
}



@using (Html.BeginForm("Action_name", "Controler_name", FormMethod.Post, new { role = "form" }))
{
}



@Html.HiddenFor(t => t.client.id)