C# 一页asp.net MVC上的多篇文章，带有部分视图

我们有一个页面，目前包含四到五个部分视图，但可能会增长。目前，有两个POST操作，用于两个完全不同的数据库函数

如果我们尝试在另一个上执行create函数，重定向将导致“对象引用未设置为对象的实例”错误，这将与另一个POST partial视图相关

有没有办法阻止这一切？本质上，在我看来，一个局部视图的帖子试图与另一个交互。有什么想法吗

谢谢

用于创建的公告控制器：

[HttpPost]
        public ActionResult CreateMain(BulletinsViewModel viewModel)
        {
            if (ModelState.IsValid)
            {
                BulletinsContext.tblBulletins.Add(new tblBulletin
                {
                    ID = viewModel.BulletinID,
                    BulletinDisplayDate = viewModel.BulletinDisplayDate,
                    BulletinFilename = viewModel.MainBulletinName,
                    IsSixthForm = viewModel.IsSixthForm                    
                });

                //For loop to delete bulletins
                //If bulletin folder has more than 10 files in
                //Delete the oldest file, itererate till only 10 remain   
                {
                    DirectoryInfo dir = new DirectoryInfo(@"D:\Inetpub\WWWroot\intranet\Dashboard\Dashboard\Files\Bulletins");
                    List<FileInfo> filePaths = dir.GetFiles().OrderByDescending(p => p.CreationTime).ToList();
                    for (int index = filePaths.Count() - 1; index > 9; index--)
                    {
                        var fileNames = filePaths[index].Name;
                        //Delete from directory
                        filePaths[index].Delete();


                        //Remove from collection to restart the loop
                        filePaths.RemoveAt(index);

                    }
                }

                //Save changes to database
                BulletinsContext.SaveChanges();

                //Return to main bulletins index page
                return RedirectToAction("~/Home/Index");
            }

            return View(viewModel);
        }

[HttpPost]
公共操作结果CreateMain（BulletinsViewModel视图模型）
{
if（ModelState.IsValid）
{
BulletinsContext.tblBulletins.Add（新的tblBulletin
{
ID=viewModel.BulletinID，
BulletinPlayDate=viewModel.BulletinPlayDate，
BulletinFilename=viewModel.MainBulletinName，
IsSixthForm=viewModel.IsSixthForm
});
//用于删除公告的循环
//如果公告文件夹中的文件超过10个
//删除最旧的文件，直到只剩下10个
{
DirectoryInfo dir=new DirectoryInfo（@“D:\Inetpub\WWWroot\intranet\Dashboard\Dashboard\Files\Bulletins”）；
List filepath=dir.GetFiles（）.OrderByDescending（p=>p.CreationTime）.ToList（）；
对于（int index=filepath.Count（）-1；索引>9；索引--）
{
var fileNames=filepath[index].Name；
//从目录中删除
文件路径[index].Delete（）；
//从集合中删除以重新启动循环
filepath.RemoveAt（索引）；
}
}
//将更改保存到数据库
BulletinsContext.SaveChanges（）；
//返回主公告索引页
返回重定向到操作（“~/Home/Index”）；
}
返回视图（viewModel）；
}

公告创建视图：

@model Dashboard.Viewmodels.BulletinsViewModel

@{
    ViewBag.Title = "Create";
}

@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()
    <div class="form-horizontal">
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })
        <div class="form-group">
            @Html.LabelFor(model => model.BulletinDisplayDate, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.BulletinDisplayDate, new { htmlAttributes = new { @class = "form-control", @id = "datepicker-basic", @readonly = "readonly" } })
                @Html.ValidationMessageFor(model => model.BulletinDisplayDate, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.MainBulletinName, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                <div class="input-group">
                    @Html.EditorFor(model => model.MainBulletinName, new { htmlAttributes = new { @class = "form-control", @Value = "Select File...", @readonly="readonly" } })
                    <span class="input-group-addon" href="javascript:;" onclick="moxman.browse({ fields: 'MainBulletinName', extensions: 'pdf', path: 'D:/Inetpub/WWWroot/intranet/Dashboard/Dashboard/Files/Bulletins' });" style="cursor: pointer;"><i class="fa fa-upload"></i></span>
                        @Html.ValidationMessageFor(model => model.MainBulletinName, "", new { @class = "text-danger" })
                </div>
            </div>
        </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>

}


<script type="text/javascript" src="~/Scripts/tinymce/plugins/moxiemanager/js/moxman.loader.min.js"></script>

@model Dashboard.Viewmodels.BulletinsViewModel
@{
ViewBag.Title=“创建”；
}
@使用（Html.BeginForm（））
{
@Html.AntiForgeryToken（）
@Html.ValidationSummary（true，“，new{@class=“text danger”}）
@LabelFor（model=>model.bulletinsplaydate，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.bulletinsplaydate，new{htmlAttributes=new{@class=“form control”，@id=“datepicker basic”，@readonly=“readonly”}）
@Html.ValidationMessageFor（model=>model.BulletinPlayDate，“，new{@class=“text danger”}）
@LabelFor（model=>model.mainbertinname，htmlAttributes:new{@class=“controllabel col-md-2”}）
@EditorFor（model=>model.mainbertinname，new{htmlAttributes=new{@class=“form control”，@Value=“Select File…”，@readonly=“readonly”}）
@Html.ValidationMessageFor（model=>model.mainbertinName，“，new{@class=“text danger”}）
}

打印机信用创建控制器：

[HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult PrinterCredits(PrinterCreditsViewModel viewModel)
        {
            if (ModelState.IsValid)
            {
                //Send the email if credits are added..
                //Create a bunch of variables for the email
                //Create the email body etc

                var fromAddress = "";
                string toName = Request.Form["Username"].ToUpper();
                string AmountOfCredits = Request.Form["AmountAdded"];
                string Plural = "";
                string Title = "";
                string AddedByWho = User.Identity.Name.Split('\\')[1];
                System.DateTime AddedWhen = DateTime.Now;
                if (AmountOfCredits == "1")
                {
                    Plural = " printer credit has ";
                    Title = "Printer Credit Added!";
                }
                else
                {
                    Plural = " printer credits have ";
                    Title = "Printer Credits Added!";
                }
                var toEmail = toName + "";
                var subject = AmountOfCredits + Plural + "been added to your account, " + toName;
                string body = "";

                //Create an SMTP client for sending an email
                var smtp = new SmtpClient
                {
                    Host = "",
                    Port = 25,
                    EnableSsl = false,
                    DeliveryMethod = SmtpDeliveryMethod.Network,
                    UseDefaultCredentials = true,
                };

                //Populate the SMTP client and encode the body for the HTML
                using (var message = new MailMessage(fromAddress, toEmail)
                {
                    Subject = subject,
                    Body = body,
                    IsBodyHtml = true,
                    BodyEncoding = System.Text.Encoding.UTF8
                })

                    //Try to send the email. If sent, insert data.
                    //Redirect back to original page
                    //Take current printer credit from and update with fund + cost

                    try
                    {
                        //Link the viewmodel and the database together
                        PartialViewContext.tblPrinterCredits.Add(new tblPrinterCredit
                        {
                            Username = viewModel.Username,
                            AmountAdded = viewModel.AmountAdded,
                            AddedBy = AddedByWho,
                            AddedWhen = viewModel.AddedWhen,
                            Money = viewModel.AmountAdded * 0.02
                        });


                        Nullable<double> cost = viewModel.AmountAdded * 0.02;

                        //Update the printer credit fund and insert into tblOption
                        tblOption fund = (
                            from n in PartialViewContext.tblOptions
                            where n.ID == 1
                            select n).First();
                        fund.PrinterCreditFund = fund.PrinterCreditFund + cost;


                        PartialViewContext.SaveChanges();
                        message.CC.Add("");
                        smtp.Send(message);

                        Response.Redirect("~/Home/Index");
                    }
                    //If it fails, go chicken oriental (only a redirect, will eventually become a crazy message)
                    catch
                    {
                        smtp.Send(message);
                        Response.Redirect("~/Home/Index");
                    }
            }
            return View(viewModel);

[HttpPost]
[ValidateAntiForgeryToken]
公共操作结果PrinterCredits（PrinterCreditsViewModel视图模型）
{
if（ModelState.IsValid）
{
//如果添加了信用卡，请发送电子邮件。。
//为电子邮件创建一组变量
//创建电子邮件正文等
var fromAddress=“”；
字符串toName=Request.Form[“Username”].ToUpper（）；
字符串AmountOfCredits=Request.Form[“AmountAdded”]；
字符串复数=”；
字符串标题=”；
字符串AddedByWho=User.Identity.Name.Split（'\\'）[1]；
System.DateTime AddedWhen=DateTime.Now；
如果（AmountOfCredits==“1”）
{
复数=“打印机信用已”；
Title=“已添加打印机信用！”；
}
其他的
{
复数=“打印机信用有”；
Title=“已添加打印机信用证！”；
}
var toEmail=toName+“”；
var subject=AmountOfCredits+复数+“已添加到您的帐户，”+toName；
字符串体=”；
//创建用于发送电子邮件的SMTP客户端
var smtp=新SmtpClient
{
主机=”，
端口=25，
EnableSsl=false，
DeliveryMethod=SmtpDeliveryMethod.Network，
UseDefaultCredentials=true，
};
//填充SMTP客户端并对HTML的正文进行编码
使用（var message=新邮件消息（fromAddress，toEmail）
{
主语，
身体，
IsBodyHtml=true，
BodyEncoding=System.Text.Encoding.UTF8
})
//尝试发送电子邮件。如果已发送，请插入数据。
//重定向回原始页面
//从获取当前打印机贷记，并使用资金+成本进行更新
尝试
{
//将viewmodel和数据库链接在一起
PartialViewContext.tblPrinterCredits.Add（新tblPrint
@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()


        <div class="panel">
            <div class="panel-heading">
                <span class="panel-icon">
                    <i class="fa fa-print"></i>
                </span>
                Add Printer Credits - @Costings
            </div>
            <div class="panel-body">
                <div class="form-horizontal">
                    @Html.ValidationSummary(true, "", new { @class = "text-danger" })
                    <div class="form-group">
                        <label class="control-label col-md-3">User:</label>
                        <div class="col-xs-8">
                            @Html.EditorFor(model => model.Username, new { htmlAttributes = new { @class = "form-control", @id = "Username", @name = "Username", @maxlength = "6" } })
                            @Html.ValidationMessageFor(model => model.Username, "", new { @class = "text-danger" })
                        </div>
                    </div>

                    <div class="form-group">
                        <label class="control-label col-md-3">Amount:</label>
                        <div class="col-xs-8">
                            @Html.EditorFor(model => model.AmountAdded, new { htmlAttributes = new { @class = "form-control", @id = "AmountAdded", @onkeyup = "Update()", @Value = 0 } })
                            @Html.ValidationMessageFor(model => model.AmountAdded, "", new { @class = "text-danger", @type="number" })
                        </div>
                    </div>

                    <div class="form-group">
                        <label class="control-label col-md-3">Cost:</label>
                        <div class="col-xs-8">
                            @Html.EditorFor(model => model.TotalCost, new { htmlAttributes = new { @class = "form-control", @id = "TotalCost", @readonly = "readonly", @Value = "0" } })
                            @Html.ValidationMessageFor(model => model.TotalCost, "", new { @class = "text-danger" })
                        </div>
                    </div>

                    <div class="form-group">
                        <div class="col-md-offset-1 col-md-10">
                            <input type="submit" value="Add Printer Credits" class="btn btn-primary btn-gradient dark btn-block" />
                            @Html.EditorFor(model => model.AddedBy, new { htmlAttributes = new { @class = "form-control", @Value = User.Identity.Name.Split('\\')[1], @Style = "display: none;" } })
                            @Html.ValidationMessageFor(model => model.AddedBy, "", new { @class = "text-danger" })
                        </div>
                    </div>

                </div>
            </div>
        </div>

}

<script type="text/javascript">
    $(document).ready(
        function () {
            Update();
            $('#AmountAdded, #TotalCost')
        .keyup(function () {
            Update();
        })
        }
        );

    function Update() {
        var cost = 2
        var one = $('#AmountAdded'),
            two = $('#TotalCost');
        two.val(parseInt(one.val()) * cost / 100);
    }

</script>

<script type="text/javascript">
    document.getElementById('Username').focus()
</script>

@using (Html.BeginForm("CreateMain", "Bulletins", FormMethod.Post, new { }))