没有为此对象定义参数少构造函数 [英] No Parameter Less Constructor defined for this Object

问题描述

你好朋友，

自过去2天以来，我收到此错误.无法摆脱它.
我有一个简单的数据输入表单，您可以在其中添加客户端名称及其信息.有2个下拉菜单国家和州.在选择国家时，填入州草稿.但是，当我单击保存"按钮时，出现错误为此对象定义了无参数的构造函数"

这是我的代码

Hello friends,

i m getting this error since past 2 days. cant get out of it.
i have simple data entry form where u add the name of the client and its information. there are 2 dropdown country and state. on selecting country, state drodpdown is filled. But when i click the save button i get the Error "No Parameter Less constructor Defined for this object"

Here is my code

<pre lang="c#">public class ClientMaster
    {
        
        public int client_ID { get; set; }

        [Required (ErrorMessage="Enter Client Name")]
        public string client_Name { get; set; }

        [Required (ErrorMessage="Enter Client Address")]
        public string client_Address { get; set; }

        public string client_Address1 { get; set; }
        public string client_Address2 { get; set; }

        [Required(ErrorMessage = "Enter Client Phone Number")]
        public long client_Phone { get; set; }
        public long client_Fax { get; set; }
        public long client_Mobile { get; set; }

        
        public int CountryID { get; set; }
        //[Required(ErrorMessage = "Kindly select Country")]
        public string CountryName{ get; set; }

        public int StateID { get; set; }
        //[Required(ErrorMessage = "Kindly Select State")]
        public string StateName { get; set; }

        [Required(ErrorMessage = "Enter the Client City")]
        public string client_City { get; set; }

        [Required(ErrorMessage = "Enter the Client Zip Code")]
        public int client_Zip { get; set; }

        public string last_Updated_By { get; set; }
        public string updated_Date { get; set; }
        public DateTime record_lock_timestamp { get; set; }
        public bool client_status { get; set; }

   

    }

<pre lang="c#">public class ClientMaster_ViewModel
    {
 
        public ClientMaster clsClientMaster { get; set; }
        public SelectList Country { get; set; }
        public SelectList State { get; set; }
        [Required(ErrorMessage="Kindly Select Country")]
        public int selectedCountry { get; set; }
       
    }

<script type="text/javascript">
    $(document).ready(function () {
        $("#Country").change(function () {
            var c_id = $(this).val();
            $.getJSON("/ClientMasterNew/GetState", { id : c_id }, function (myData) {
                var select = $("#State");
                select.empty();
                $.each(myData, function (index, itemData) {
                    select.append($('<option/>', {
                        value : itemData.ID,
                        text : itemData.StateName
                    }))
               });
            });
        });
    });

</script>
<% using (Html.BeginForm("Create", "ClientMasterNew", FormMethod.Post,this.Model))
   { %>
    <%: Html.ValidationSummary(true, "New Client Creation was unsuccessful. Please correct the errors and try again.")%>
    <fieldset>
        <legend>ClientMaster</legend>

        <div class="editor-label">
            <%: Html.LabelFor(model => model.clsClientMaster.client_Name)%>
        </div>
        <div class="editor-field">
            <%: Html.EditorFor(model => model.clsClientMaster.client_Name)%>
            <%: Html.ValidationMessageFor(model => model.clsClientMaster.client_Name)%>
        </div>

        <div class="editor-label">
            <%: Html.LabelFor(model => model.clsClientMaster.client_Address)%>
        </div>
        <div class="editor-field">
            <%: Html.EditorFor(model => model.clsClientMaster.client_Address)%>
            <%: Html.ValidationMessageFor(model => model.clsClientMaster.client_Address)%>
        </div>

        <div class="editor-label">
            <%: Html.LabelFor(model => model.clsClientMaster.client_Address1)%>
        </div>
        <div class="editor-field">
            <%: Html.EditorFor(model => model.clsClientMaster.client_Address1)%>
            <%: Html.ValidationMessageFor(model => model.clsClientMaster.client_Address1)%>
        </div>

        <div class="editor-label">
            <%: Html.LabelFor(model => model.clsClientMaster.client_Address2)%>
        </div>
        <div class="editor-field">
            <%: Html.EditorFor(model => model.clsClientMaster.client_Address2)%>
            <%: Html.ValidationMessageFor(model => model.clsClientMaster.client_Address2)%>
        </div>

        <div class="editor-label">
            <%: Html.LabelFor(model => model.clsClientMaster.client_Phone)%>
        </div>
        <div class="editor-field">
            <%: Html.EditorFor(model => model.clsClientMaster.client_Phone)%>
            <%: Html.ValidationMessageFor(model => model.clsClientMaster.client_Phone)%>
        </div>

        <div class="editor-label">
            <%: Html.LabelFor(model => model.clsClientMaster.client_Fax)%>
        </div>
        <div class="editor-field">
            <%: Html.EditorFor(model => model.clsClientMaster.client_Fax)%>
            <%: Html.ValidationMessageFor(model => model.clsClientMaster.client_Fax)%>
        </div>

        <div class="editor-label">
            <%: Html.LabelFor(model => model.clsClientMaster.client_Mobile)%>
        </div>
        <div class="editor-field">
            <%: Html.EditorFor(model => model.clsClientMaster.client_Mobile)%>
            <%: Html.ValidationMessageFor(model => model.clsClientMaster.client_Mobile)%>
        </div>

        <div class="editor-label">
            <%: Html.LabelFor(model => model.clsClientMaster.CountryName)%>
        </div>
        <div class="editor-field">
            <%: Html.DropDownListFor(model => model.selectedCountry,(SelectList)ViewData["Countries"], new { id = "Country" })%>
            <%--new { onchange = "this.form.action='/ClientMasterNew/CreateClient';this.form.submit();" }--%>
            <%--<%: Html.ValidationMessageFor(model => model.clsClientMaster.CountryName)%>--%>
        </div>

         <div class="editor-label">
            <%: Html.LabelFor(model => model.clsClientMaster.StateName)%>
        </div>
        <div class="editor-field">
            <%: Html.DropDownListFor(model => model.State, (SelectList)ViewData["States"], new { id = "State" })%>
           <%-- <%: Html.ValidationMessageFor(model => model.clsClientMaster.client_State)%>--%>
        </div>
        <div class="editor-label">
            <%: Html.LabelFor(model => model.clsClientMaster.client_City)%>
        </div>
        <div class="editor-field">
            <%: Html.EditorFor(model => model.clsClientMaster.client_City)%>
            <%: Html.ValidationMessageFor(model => model.clsClientMaster.client_City)%>
        </div>

        <div class="editor-label">
            <%: Html.LabelFor(model => model.clsClientMaster.client_Zip)%>
        </div>
        <div class="editor-field">
            <%: Html.EditorFor(model => model.clsClientMaster.client_Zip)%>
            <%: Html.ValidationMessageFor(model => model.clsClientMaster.client_Zip)%>
        </div>


        <div class="editor-label">
            <%: Html.LabelFor(model => model.clsClientMaster.client_status)%>
        </div>
        <div class="editor-field">
            <%: Html.EditorFor(model => model.clsClientMaster.client_status)%>
            <%: Html.ValidationMessageFor(model => model.clsClientMaster.client_status)%>
        </div>

        <p>
            <input type="submit" value="Create"  />
        </p>

[AcceptVerbs(HttpVerbs.Get)]
      public JsonResult GetState(string id)
      {
          var StateList = GetStates(Convert.ToInt32(id));

          //Fill_Countries(false, 0, Convert.ToInt32(id));
          return Json(StateList, JsonRequestBehavior.AllowGet);
      }

      public IList<StateMaster> GetStates(int cid)
      {
          //to fill state dropdown
          IList<StateMaster> States = BAL_ClientMaster.Fill_States(cid).ToList();
          return States;
      }

      //[AcceptVerbs(HttpVerbs.Get)]
      //public ActionResult CreateClient(ClientMaster_ViewModel cmVM)
      //{
      //    int countryID = Convert.ToInt32(cmVM.selectedCountry);
      //    Fill_Countries(ref cmVM, true, 0, countryID);
      //    return View(cmVM);
      //}

      //
      // POST: /ClientMasterNew/Create
      [AcceptVerbs(HttpVerbs.Post)]
      public ActionResult Create(FormCollection collection, ClientMaster_ViewModel cmVM)
      {
          try
          {
              int CountryId = 0, stateid = 0;
              // TODO: Add insert logic here
              if (ModelState.IsValid)
              {
                  CountryId = Convert.ToInt32(collection["ClientMaster_ViewModel.Country"]);

                  stateid = Convert.ToInt32(collection["ClientMaster_ViewModel.State"]);

                  //var name = model.client_Name;

                  string[] arr_val = BAL_ClientMaster.InsertClient(cmVM, CountryId, 1, "Ketan Naik");

                  if (Convert.ToBoolean(arr_val[0]) == true)
                  {
                      ViewData["OutPutMsg"] = Convert.ToString(arr_val[1]);
                      return RedirectToAction("Index", "ClientMasterNew");
                  }
                  else
                  {
                      ModelState.AddModelError("", Convert.ToString(arr_val[1]));
                  }
              }
              Fill_Countries(ref cmVM, true, CountryId, stateid);
              return View(cmVM);
          }
          catch
          {
              return View();
          }

          //return View();
      }

推荐答案

(文档).ready(功能(){

(document).ready(function () {

(" ).change(功能(){ var c_id =

("#Country").change(function () { var c_id =

( this ).val();

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