如何在Asp.net MVC4中避免回传

我有一个表单，它将绑定两个不同的下拉列表中的一些值，并且我保存用户选择的值。现在我使用RequiredIf attributes.Its也可以正常工作。如果用户错过选择它显示消息的值，同样，在点击提交按钮后，下拉菜单中的一些选定值将默认为默认值。由于操作结果再次载入，我需要显示差异而用户选择没有任何变化。如何在Asp.net MVC4中避免回传

My Code for Model is;

> public ObservableCollection<Receipt> GetReceiptList() 
>   { 
>    ObservableCollection<Receipt> ReceiptList = new ObservableCollection<Receipt>(); 
>    DataTable dtReceipt = new DataTable(); 
>    dtReceipt = objDAL.ExecuteTable(CommandType.StoredProcedure, "sp_Receipt_Select"); 
>    foreach (DataRow dr in dtReceipt.Rows) 
>    { 
>     ReceiptList.Add(new Receipt 
>     { 
>      Id = Convert.ToInt32(dr["REC_Id_I"]), 
>      Cust_Name = dr["CUS_Name_V"].ToString(), 
>      Pay_Amount = dr["REC_PaidAmount_M"].ToString(), 
>      Pay_Mode = dr["REC_PayMode_C"].ToString(), 
>      Bank_Name = dr["REC_BankName_V"].ToString(), 
>      Bank_Address = dr["REC_BankAddress"].ToString(), 
>      ChequeNo = dr["REC_ChequeNo_V"].ToString(), 
>      Cheque_Date = dr["REC_ChequeDate_D"].ToString(), 
>     }); 
>    } 
>    return ReceiptList; 
>   }

的控制代码

//AtLoad 
public ActionResult ReceiptMaster(Receipt model) 
     { 
      ObservableCollection<Receipt> ReceiptList = new ObservableCollection<Receipt>(); 
      Receipt Receipt = new Models.Receipt(); 
      ReceiptList = Receipt.GetReceiptList(); 
      ModelState.Clear(); 
      Sales sales = new Models.Sales(); 
      DataTable dtCustomer = new DataTable(); 
      dtCustomer = sales.GetCustomerList(); 

      IList<Sales> MyCustList = new List<Sales>(); 
      foreach (DataRow mydataRow in dtCustomer.Rows) 
      { 
       MyCustList.Add(new Sales() 
       { 
        Cust_Id = Convert.ToInt32(mydataRow["Id"].ToString().Trim()), 
        Cust_Name = mydataRow["Name"].ToString().Trim() 
       }); 
      } 
      var CustName = new SelectList(MyCustList, "Id", "Cust_Name"); 
      ViewData["Cu_Name"] = CustName; 
      return View(ReceiptList); 
     } 



    //TO Insert 
[HttpPost] 
     public ActionResult ReceiptMaster(Receipt model, string command) 
     { 
      Receipt Receipt = new Models.Receipt(); 

      if (command == "Sumbit") 
      { 
       int Id = 0; 
       if (model.Pay_Mode == "C") 
       { 
        model.ChequeNo = ""; 
        model.Cheque_Date = ("1/1/1753 12:00:00 AM"); 
        model.Bank_Name = ""; 
        model.Bank_Address = ""; 
       } 

       if (ModelState.IsValid) 
       { 
        Id = Receipt.SaveReceipt(model.Id, model.Cust_Id, model.Pay_Amount, model.Pay_Mode, model.Bank_Name, model.Bank_Address, model.ChequeNo, model.Cheque_Date); 
        if (Id > 0) 
        { 
         ViewData["Success"] = "Product was saved successfully."; 
         ViewData["ControlView"] = 1; 

         return RedirectToAction("ReceiptMaster", "Admin"); 

        } 
        return RedirectToAction("ReceiptMaster", "Admin"); 
       } 

       ObservableCollection<Receipt> ReceiptList = new ObservableCollection<Receipt>(); 
       ReceiptList = Receipt.GetReceiptList(); 
       return View(ReceiptList); 
      } 

      ObservableCollection<Receipt> ReceiptList1 = new ObservableCollection<Receipt>(); 
      ReceiptList1 = Receipt.GetReceiptList(); 
      return View(ReceiptList1); 

     }

脚本在下拉用于绑定值

<script type="text/javascript"> 

    $(document).ready(function() { 
     $.post('@Url.Action("SelectCustomerForDropJson", "Admin")', null, function (data) { 
      var select = $("#Cust_Id"); 
      select.empty(); 
      select.append($('<option/>', { value: '', text: '--Select--' })); 
      $.each(data, function (index, Data) { 
       select.append($('<option/>', { 
        value: Data.Value, 
        text: Data.Text 
       })); 
      }); 
     }); 
    }); 
</script>

来源

2013-09-27 Praveen S

变化return RedirectToAction("ReceiptMaster", "Admin");到

return View(model);

在您的文章行动

如果您使用RedirectToAction，那么它的加载HTTP GET方法。所以你的验证信息不见了。

然后只需复制过去我下面的代码，而不是你的帖子的操作代码

，并删除此行：Receipt Receipt = new Models.Receipt();和呼叫模型，而不是收据

//TO Insert 
[HttpPost] 
     public ActionResult ReceiptMaster(Receipt model, string command) 
     { 


      if (command == "Sumbit") 
      { 
       int Id = 0; 
       if (model.Pay_Mode == "C") 
       { 
        model.ChequeNo = ""; 
        model.Cheque_Date = ("1/1/1753 12:00:00 AM"); 
        model.Bank_Name = ""; 
        model.Bank_Address = ""; 
       } 

       if (ModelState.IsValid) 
       { 
        Id = Receipt.SaveReceipt(model.Id, model.Cust_Id, model.Pay_Amount, model.Pay_Mode, model.Bank_Name, model.Bank_Address, model.ChequeNo, model.Cheque_Date); 
        if (Id > 0) 
        { 
         ViewData["Success"] = "Product was saved successfully."; 
         ViewData["ControlView"] = 1; 
          ObservableCollection<Receipt> ReceiptList = new    ObservableCollection<Receipt>(); 
      ReceiptList = Receipt.GetReceiptList(); 
      return View(ReceiptList); 

        } 
        ObservableCollection<Receipt> ReceiptList = new ObservableCollection<Receipt>(); 
      ReceiptList = Receipt.GetReceiptList(); 
      return View(ReceiptList); 
       } 

       ObservableCollection<Receipt> ReceiptList = new ObservableCollection<Receipt>(); 
       ReceiptList = Receipt.GetReceiptList(); 
       return View(ReceiptList); 
      } 

      ObservableCollection<Receipt> ReceiptList1 = new ObservableCollection<Receipt>(); 
      ReceiptList1 = Receipt.GetReceiptList(); 
      return View(ReceiptList1); 

     }

编辑

请为ReceiptList添加一个模型属性，并将该属性中的值分配到您的post方法中，现在r仅限于模型（现在将此ReceiptList值存储在您最近的ReceiptList属性中），但您只返回您的gridview属性来查看。但验证消息和以前的值存储在模型属性中。因此，您需要在模型中为ReceiptList添加一个属性，并在此属性中读取和写入网格视图数据。

现在，你可以尝试一下下面的代码（要看到我的意见，试想对于model.ReceiptList是我们在模型中添加新的属性）

//TO Insert 
[HttpPost] 
     public ActionResult ReceiptMaster(Receipt model, string command) 
     { 


      if (command == "Sumbit") 
      { 
       int Id = 0; 
       if (model.Pay_Mode == "C") 
       { 
        model.ChequeNo = ""; 
        model.Cheque_Date = ("1/1/1753 12:00:00 AM"); 
        model.Bank_Name = ""; 
        model.Bank_Address = ""; 
       } 

       if (ModelState.IsValid) 
       { 
        Id = Receipt.SaveReceipt(model.Id, model.Cust_Id, model.Pay_Amount, model.Pay_Mode, model.Bank_Name, model.Bank_Address, model.ChequeNo, model.Cheque_Date); 
        if (Id > 0) 
        { 
         ViewData["Success"] = "Product was saved successfully."; 
         ViewData["ControlView"] = 1; 
          ObservableCollection<Receipt> ReceiptList = new    ObservableCollection<Receipt>(); 
      model.ReceiptList = Receipt.GetReceiptList();// model.ReceiptList is your model property 
      return View(model); 

        } 
        ObservableCollection<Receipt> ReceiptList = new    ObservableCollection<Receipt>(); 
      model.ReceiptList = Receipt.GetReceiptList();// model.ReceiptList is your model property 
      return View(model); 
       } 

       ObservableCollection<Receipt> ReceiptList = new ObservableCollection<Receipt>(); 
       ReceiptList = Receipt.GetReceiptList(); 
       return View(ReceiptList); 
      } 

      ObservableCollection<Receipt> ReceiptList = new    ObservableCollection<Receipt>(); 
      model.ReceiptList = Receipt.GetReceiptList();// model.ReceiptList is your model property 
      return View(model); 

     }

在模型类添加一个属性，像

ObservableCollection<Receipt> ReceiptList {get :set;}

来源

2013-09-27 11:26:55

先生其罚款......但我用同样的形式的网格，所以它会显示绑定错误。 –

现在更改我的代码，请参阅并尝试 –

对不起，先生，现在也是它的作品我以前的.. –

我不是100％肯定你问什么，但它听起来像你需要enable client side validation on your RequiredIf attribute。

来源

2013-09-27 11:26:20

下面的代码防止％100回发，只是尝试。

您需要使用Json以防止在您的页面中完全回传。之后，您必须返回到部分视图。

作为实例;

HTML代码：

<input type="text" id="UserName" name="UserName"/> 
<input type="button" onclick="ButonClick()" value="Enter"/>

JavaScript代码：

function ButonClick() { 
var data= { 
UserName: $('#UserName').val(), 
}; 
$.ajax({ 
url: "/Home/MyActionResult", 
type: "POST", 
dataType: "json", 
contentType: 'application/json', 
data: JSON.stringify(data),

控制器：

public ActionResult MyActionResult(string UserName,MyModel model) 
{ 
var stringView = RenderRazorViewToString("_YourPartialView", model); 
return Json(stringView, JsonRequestBehavior.AllowGet); 
}

注：

你需要下面的代码来呈现为JSON的局部视图。

以下也添加到您的控制器。

public string RenderRazorViewToString(string viewName, object model) 
{ 
ViewData.Model = model; 
using (var sw = new StringWriter()) 
{ 
var viewResult = ViewEngines.Engines.FindPartialView(ControllerContext, viewName); 
var viewContext = new ViewContext(ControllerContext, viewResult.View, ViewData, TempData, sw); 
viewResult.View.Render(viewContext, sw); 
viewResult.ViewEngine.ReleaseView(ControllerContext, viewResult.View); 
return sw.GetStringBuilder().ToString(); 
} 
}

来源

2013-09-27 11:56:01

如何在Asp.net MVC4中避免回传

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