当我尝试通过模型列表从视图到控制器 post 200 多条记录时，它在控制器 HTTP POST 中始终显示为 null MVC 中的操作

Question

我正在尝试将模型列表从视图提交到控制器。它适用于列表中 200 条以下的记录。但是当我尝试通过模型对象从视图到控制器 post 超过 200 条记录时，它总是在控制器中显示 null。

The code which I have written as follows -

**In Model -**


    public partial class SlsaudtMerchId
        {
            [Key]`enter code here`
            [Required]
            public int Company { get; set; }enter code here
            public int Store { get; set; }
            public string TermLoc { get; set; }
            [Key]
            [Required]
            public int TermId { get; set; }
            public DateTime Updated { get; set; }
            public string Inactive { get; set; }
        }
        public class SlsAuditMerchId_Cust
        {
            /// <summary>  
            /// To hold list of orders  
            /// </summary>  
            public List<SlsaudtMerchId> SlsaudtMerchIds { get; set; }
    
        }
    
    **In View -**
    
  @model PostListData.Models.SlsAuditMerchId_Cust    
    @{
        ViewData["Title"] = "PlaceOrder";
    }
    
    <h1>PlaceOrder</h1>
    
    <p>
        <a asp-action="Create">Create New</a>
    </p>
    <div>
    
    </div>
    @using (Html.BeginForm(FormMethod.Post))
    {
        @Html.AntiForgeryToken()
    
        <div class="form-horizontal">
            <div class="form-group">
                <div class="col-md-offset-2 col-md-10 text-right">
                    <input type="button" value="Add Product" class="btn btn-primary" />
                </div>
            </div>
            <div class="form-group">
                <div class="col-md-12">
                    <table class="table table-condensed table-hover">
                        <tr>
                            <th>
                                Product Code
                            </th>
                            <th>
                                Product Name
                            </th>
                            <th>
                                Quantity
                            </th>
                            <th>
                                Price
                            </th>
                            <th>
                                Total Amount
                            </th>
                        </tr>
                        @{
                           
                            int i = 0;
                            foreach (var item in Model.SlsaudtMerchIds.ToList())
                            {
    
                                            <tr>
                                                <td>
    
    
                       @Html.EditorFor(o => o.SlsaudtMerchIds[i].Company, new { @id = "ItemCode_" + i })
                                                </td>
                                                <td>
                                                    @Html.EditorFor(o => o.SlsaudtMerchIds[i].Store, new { @id = "ProductName_" + i })
                                                </td>
                                                <td>
                                                    @Html.EditorFor(o => o.SlsaudtMerchIds[i].TermLoc, new { @id = "Qty_" + i })
                                                </td>
                                                <td>
                                                    `enter code here`@Html.EditorFor(o => o.SlsaudtMerchIds[i].TermId, new { @id = "Price_" + i })
                                                </td>
                                                <td>
                                                    @Html.EditorFor(o => o.SlsaudtMerchIds[i].Updated, new { @id = "Updtd_" + i })
                                                </td>
                                                <td>
                                                    @Html.EditorFor(o => o.SlsaudtMerchIds[i].Inactive, new { @id = "inactv_" + i })
                                                </td>
    
                                            </tr>
    
                                i++;
                            }
                        }
                    </table>
                </div>
            </div>
            <hr />
            <div class="form-group">
                <div class="col-md-offset-2 col-md-10 text-center">
                    <input type="submit" value="Place Order" class="btn btn-primary" />
                </div>
            </div>
        </div>
    }
    
    **In Controller :**
      public IActionResult Index()
            {
                List<SlsaudtMerchId> objOrder = new List<SlsaudtMerchId>()
                       //ObjOrder will be populated from API
                SlsAuditMerchId_Cust ObjOrderDetails = new SlsAuditMerchId_Cust();
                ObjOrderDetails.SlsaudtMerchIds = objOrder;
                return View(ObjOrderDetails);
            }
           [HttpPost]
          `enter code here`  public IActionResult Index(SlsAuditMerchId_Cust MerchId)
              // It is sowing null for above 200 records`enter code here`
            {
    
    
                return View();
            } 

我不明白我在这里犯了什么错误。当我尝试通过模型列表提交低于 200 (175-180) 条记录时，它成功提交了控制器中的列表参数捕获所有 175 条记录列表。但是当我尝试增加列表的计数时，它在控制器的列表参数中显示为 null。

请帮帮我， 提前致谢

素门.

Answer 1

您可以在 startup

中添加以下代码

services.AddMvc(options => {
   options.MaxModelBindingCollectionSize = 100000;
});          
services.Configure<FormOptions>(options => {
  options.ValueCountLimit = int.MaxValue; 
  options.ValueLengthLimit = int.MaxValue;             
  options.MultipartHeadersLengthLimit = int.MaxValue;
});