MetadataType attribute on partial class not merging class with DataAnnotations on runtime. [Answered]RSS

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  itsathere

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  3 Points

  55 Posts

  MetadataType attribute on partial class not merging class with DataAnnotations on runtime.

  Aug 29, 2019 06:53 AM|itsathere|LINK

  //------------------------------------------------------------------------------
  // <auto-generated>
  //     This code was generated from a template.
  //
  //     Manual changes to this file may cause unexpected behavior in your application.
  //     Manual changes to this file will be overwritten if the code is regenerated.
  // </auto-generated>
  //------------------------------------------------------------------------------
  
  namespace WebApp
  {
      using System;
      using System.Collections.Generic;
      
      public partial class tblEmployee
      {
          public int EmployeeID { get; set; }
          public string Name { get; set; }
          public string City { get; set; }
          public string Department { get; set; }
          public string Gender { get; set; }
      }
  }
  

  Above model is generated using edmx and I am trying to add DataAnnotations. So, I am using MetadataType attribute like below code snippet and It's doesn't work as expected

  using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Web;
  using System.ComponentModel.DataAnnotations;
  
  namespace WebApp.Models
  {
      [MetadataType(typeof(EmployeeMetaData))]
      public partial class tblEmployee
      {
          class EmployeeMetaData 
          {
              [Required(ErrorMessage = "Full Name is required")]
              [Display(Name = "Full Name")]
              public string Name { get; set; }
              [Required(ErrorMessage = "City Name is required")]
              [Display(Name = "City Name")]
              public string City { get; set; }
              [Required(ErrorMessage = "Department Name is required")]
              [Display(Name = "Department Name")]
              public string Department { get; set; }
              [Required(ErrorMessage = "Gender is required")]
              public string Gender { get; set; }
          }
      }
  }

  Below is the the html of view 

  @model WebApp.tblEmployee
  
  @{
      ViewBag.Title = "Create";
      Layout = "~/Views/Shared/_Layout.cshtml";
  }
  
  <h2>Create</h2>
  
  @using (Html.BeginForm()) 
  {
      @Html.AntiForgeryToken()
      
      <div class="form-horizontal">
          <h4>Employee</h4>
          <hr />
          @Html.ValidationSummary(true, "", new { @class = "text-danger" })
          <div class="form-group">
              @Html.LabelFor(model => model.Name, htmlAttributes: new { @class = "control-label col-md-2" })
              <div class="col-md-10">
                  @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "form-control" } })
                  @Html.ValidationMessageFor(model => model.Name, "", new { @class = "text-danger" })
              </div>
          </div>
  
          <div class="form-group">
              @Html.LabelFor(model => model.City, htmlAttributes: new { @class = "control-label col-md-2" })
              <div class="col-md-10">
                  @Html.EditorFor(model => model.City, new { htmlAttributes = new { @class = "form-control" } })
                  @Html.ValidationMessageFor(model => model.City, "", new { @class = "text-danger" })
              </div>
          </div>
  
          <div class="form-group">
              @Html.LabelFor(model => model.Department, htmlAttributes: new { @class = "control-label col-md-2" })
              <div class="col-md-10">
                  @Html.EditorFor(model => model.Department, new { htmlAttributes = new { @class = "form-control" } })
                  @Html.ValidationMessageFor(model => model.Department, "", new { @class = "text-danger" })
              </div>
          </div>
  
          <div class="form-group">
              @Html.LabelFor(model => model.Gender, htmlAttributes: new { @class = "control-label col-md-2" })
              <div class="col-md-10">
                  @Html.EditorFor(model => model.Gender, new { htmlAttributes = new { @class = "form-control" } })
                  @Html.ValidationMessageFor(model => model.Gender, "", new { @class = "text-danger" })
              </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("Back to List", "Index")
  </div>
  

  On submit the blank form then it's doesn't show any validation error and post the data to controller with Model.IsValid =true. I am proving the link of blank form and controller action method with valid model using below links.
  on submit Blank form and Valid model after blank form submit
  
  
  
  

• • Reply
  itsathere

  Member

  3 Points

  55 Posts

  Re: MetadataType attribute on partial class not merging class with DataAnnotations on runtime.

  Aug 29, 2019 08:20 AM|itsathere|LINK

  Tried to use the same namespace in both the partial classes and it worked for me.