没有类型为'IEnumerable< SelectListItem>'的ViewData项 [英] There is no ViewData item of type 'IEnumerable<SelectListItem>'

查看：85 发布时间：2019/6/12 8:42:16 MVC

本文介绍了没有类型为'IEnumerable< SelectListItem>'的ViewData项的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我花了将近10个小时，谷歌阅读接近100页但仍然无法解决。

错误消息 - 附加信息：没有类型为'IEnumerable< SelectListItem>'的ViewData项目，其键有'ChartNo'

我的课程。

头等舱

公共课eChart

{

[Key]

[显示（姓名=图号）]

public int ChartNo {get;组; }

[必需，StringLength（25），显示（名称=名字）]

公共字符串PatientFirstName {get;组; }

[必需，StringLength（25），显示（姓名=姓氏）]

公共字符串PatientLastName {get;组; }

[必需（ErrorMessage =需要移动）]

[RegularExpression（@^ \（？（[0 -9] {3}）\）？[ - 。]？（[0-9] {3}）[ - 。]？（[0-9] {4}）$，ErrorMessage =输入的手机格式无效。）]

[数据类型（DataType.PhoneNumber）]

[显示（姓名=电话号码）]

公共字符串PatientPhoneNo {get;组; }

公共虚拟ICollection< treatment>治疗{得到;组; }

}

第二课

公共课程待遇

{

[Key]

public int TreatmentNo {get;组; }

[必填，显示（名称=治疗状态）]

公共字符串TreatmentStatus {get;组; }

[显示（名称=初始访问日期）]

public DateTime InitialVisit {get;组; }

[显示（姓名=上次访问日期）]

public DateTime LastVisit {get;组; }

[显示（姓名=下次访问日期）]

public DateTime NextVisit {get;组; }

public int ChartNo {get;组; } $ / $

公共虚拟eChart eChart {get;组; }

}

观看次数

索引（有标签，其中一个标签使用局部视图）

 @ {
 ViewBag.Title =   eChartHome; 
布局=  〜/ Views / Shared / _Layout.cshtml; 
} 
 
< div 类 =   container >  
<！--------> 
< div id =   content  >  
< ul id =   tabs 类 =   nav nav-tabs data-tabs =  标签 >  
< li  class  =   active>< a href =   #search data-toggle =   tab>搜索< /   a  >  < /   li  >  
< li>< a href =  ＃createupdatechart数据-toggle =   tab>创建/更新 - 图表< /   a  >  < ; /   li  >  
< li>< a href =  ＃treatments data-toggle =   tab> Treatments < /   a  >  < /   li  >  
 < /   ul  <温泉n class =code-keyword>>  
< div id =   my -tab-content  class  =  标签内容 >  
 
 @ *创建/更新标签 - 从这里开始* @ 
< div  class  =   tab-pane id =   createupdatechart >  
 @ *< h3  class  =   text-成功>创建新图表！< /   h3  >  * @ 
 
< div  class  =   container >  
< div  class  =   row >  
< div  class  =   col-md-9 >  
< div  class  =   panel panel-info >  
< div  class  =  面板-heading >  
< h5>创建新图表。 < /   h5  >  
 < /  < span class =code-leadattribute> div  >  
< div  class  =   panel-body >  
 @ Html.Partial（  _ createChartPartial）
 < /   div  >  
 < span class =code-keyword>< /   div  >  
 < /   div  >  
 
 < /   div  > ;  
 < /   div  >  
 < /   div  >  
 @ *创建/更新标签 - 在此结束* @ 
 
< div  class  =    tab-pane id =  处理 >  
 @ *< h3  class  =   text-success>创建新图表！< /   h3  >  * @ 
 
< div  class  =  容器 >  
< div  class  =  <跨度class =code-string> row >  
< div  class  =   col-md-9 >  
< div  class  =  面板 - 信息 >  
< div  class  =   panel-heading >  
< h5>创建新处理。< /   h5  >  
 < /   div  >  
< div  class  = < span class =code-string>  panel-body >  
 @ Html.Partial（  _ createTreatmentPartial）@ *这里我调用部分视图.. 此  抛出错误。如果我只是输入 正文，它就可以了。 
 < /   div  >  
 < /   div  >  
 < /   div   >  
 
 < /   div  >  
 < /   div  >  
 < /   div  >  
 @ *创建/更新标签 - 此处结束* @ 
 
 
 < /   div  >  
 <脚本    type   =  text / javascript >  
 jQuery（document）.ready（function（$）{
 $（ ' ＃tabs'）。tab（）; 
}）; 
 < /   script  >  
 < /   div  > <！ - 容器 - >

部分视图

 @ model ModalBootstrap.Models.Treatment 
 
 @using（Html.BeginForm（ ））
 {
 @ Html.AntiForgeryToken（）
 
< div  class  =   form-horizontal >  
< h4> ;处理< /   h4  >  
 
 @ Html.ValidationSummary（ true ）
 
< div  class  =   form-group >  
 @ Html.LabelFor（model =  >  model.TreatmentStatus， new  {@class =   control-label col-md-2}）
< div  class  =   col-md-10 >  
 @Html。 EditorFor（model = >  model.TreatmentStatus）
 @ Html.ValidationMessageFor（model = >  model.TreatmentStatus）
 < /   div  >  
 < /   div  >  
< div 类 =   form-group >  
 @ Html.LabelFor（model = >  model.ChartNo，  ChartNo， new  {@class =   control-label col-md-2 }）
< div  class  =   col-md-10 >  
 @ * @ Html.DropDownList（model = >  model.ChartNo，ViewData [  ChartNo]  as  SelectList）* @ * 
 
 @ Html.DropDownList（  ChartNo）@ *我尝试了所有这些不同的方式......没有用!! * @ 
 @ * @ Html.DropDownList（  ChartNo，ViewBag.Roles  as  SelectList）
 @Html。 DropDownList（  ChartNo， null ，  选择图表， null ）* @ 
 @ Html.ValidationMessageFor（model = >  model.ChartNo）
 < /   div  >  
 < /   div  >  
 
< div 类 =   form-group >  
< div  class  =   col-md-offset-2 col-md-10 >  
< input type =   submit  value  =  创建  class  =   btn btn-default /> 
 < /   div  >  
 < /   div  >  
 < /   div   >  
} 
 
< div> 
 @ Html.ActionLink（ 返回列表， 索引）
 < /   div  >

控制器

 public ActionResult Create（）
 {
 // List <   SelectListItem  >  item = new SelectList（db.eCharts，ChartNo ）; 
 
 // ViewBag.ChartNo = item; 
 // ViewData [ChartNo] =新的SelectList（db.eCharts，ChartNo，PatientFirstName）; 
 
 ViewData [ChartNo] =新的SelectList（db.eCharts，ChartNo，ChartNo）; 
 
 
 return View（）; 
}

解决方案

，ErrorMessage =输入的手机格式无效。）]

[DataType（DataType.PhoneNumber）]

[显示（姓名=电话号码）]

公共字符串PatientPhoneNo {get; set;}

公共虚拟ICollection<治疗>治疗{get; set;}

}

第二课

公共课治疗

{

[Key]

public int TreatmentNo {get; set;}

[必填，显示（姓名=治疗状态）]

公共字符串TreatmentStatus {get; set;}

[显示（名称=初始访问日期）]

public DateTime InitialVisit {get; set;}

[显示（姓名=上次访问日期）]

public DateTime LastVisit {get; set;}

[显示（名称=下次访问日期）]

public DateTime NextVis它{得到;组; }

public int ChartNo {get;组; } $ / $

公共虚拟eChart eChart {get;组; }

}

观看次数

索引（有标签，其中一个标签使用局部视图）

 @ {
 ViewBag.Title =   eChartHome; 
布局=  〜/ Views / Shared / _Layout.cshtml; 
} 
 
< div 类 =   container >  
<！--------> 
< div id =   content  >  
< ul id =   tabs 类 =   nav nav-tabs data-tabs =  标签 >  
< li  class  =   active>< a href =   #search data-toggle =   tab>搜索< /   a  >  < /   li  >  
< li>< a href =  ＃createupdatechart数据-toggle =   tab>创建/更新 - 图表< /   a  >  < ; /   li  >  
< li>< a href =  ＃treatments data-toggle =   tab> Treatments < /   a  >  < /   li  >  
 < /   ul  <温泉n class =code-keyword>>  
< div id =   my -tab-content  class  =  标签内容 >  
 
 @ *创建/更新标签 - 从这里开始* @ 
< div  class  =   tab-pane id =   createupdatechart >  
 @ *< h3  class  =   text-成功>创建新图表！< /   h3  >  * @ 
 
< div  class  =   container >  
< div  class  =   row >  
< div  class  =   col-md-9 >  
< div  class  =   panel panel-info >  
< div  class  =  面板-heading >  
< h5>创建新图表。 < /   h5  >  
 < /  < span class =code-leadattribute> div  >  
< div  class  =   panel-body >  
 @ Html.Partial（  _ createChartPartial）
 < /   div  >  
 < span class =code-keyword>< /   div  >  
 < /   div  >  
 
 < /   div  > ;  
 < /   div  >  
 < /   div  >  
 @ *创建/更新标签 - 在此结束* @ 
 
< div  class  =    tab-pane id =  处理 >  
 @ *< h3  class  =   text-success>创建新图表！< /   h3  >  * @ 
 
< div  class  =  容器 >  
< div  class  =  <跨度class =code-string> row >  
< div  class  =   col-md-9 >  
< div  class  =  面板 - 信息 >  
< div  class  =   panel-heading >  
< h5>创建新处理。< /   h5  >  
 < /   div  >  
< div  class  = < span class =code-string>  panel-body >  
 @ Html.Partial（  _ createTreatmentPartial）@ *这里我调用部分视图.. 此  抛出错误。如果我只是输入 正文，它就可以了。 
 < /   div  >  
 < /   div  >  
 < /   div   >  
 
 < /   div  >  
 < /   div  >  
 < /   div  >  
 @ *创建/更新标签 - 此处结束* @ 
 
 
 < /   div  >  
 <脚本    type   =  text / javascript >  
 jQuery（document）.ready（function（

< blockquote>）{

（' ＃tabs'）。标签（）;
}）;
< / script >
< / div > <！ - 容器 - >

部分视图

 @ model ModalBootstrap.Models.Treatment 
 
 @using（Html.BeginForm（ ））
 {
 @ Html.AntiForgeryToken（）
 
< div  class  =   form-horizontal >  
< h4> ;处理< /   h4  >  
 
 @ Html.ValidationSummary（ true ）
 
< div  class  =   form-group >  
 @ Html.LabelFor（model =  >  model.TreatmentStatus， new  {@class =   control-label col-md-2}）
< div  class  =   col-md-10 >  
 @Html。 EditorFor（model = >  model.TreatmentStatus）
 @ Html.ValidationMessageFor（model = >  model.TreatmentStatus）
 < /   div  >  
 < /   div  >  
< div 类 =   form-group >  
 @ Html.LabelFor（model = >  model.ChartNo，  ChartNo， new  {@class =   control-label col-md-2 }）
< div  class  =   col-md-10 >  
 @ * @ Html.DropDownList（model = >  model.ChartNo，ViewData [  ChartNo]  as  SelectList）* @ * 
 
 @ Html.DropDownList（  ChartNo）@ *我尝试了所有这些不同的方式......没有用!! * @ 
 @ * @ Html.DropDownList（\"ChartNo\", ViewBag.Roles as SelectList) 
 @Html.DropDownList(\"ChartNo\", null, \"Select Chart\", null)*@ 
 @Html.ValidationMessageFor(model => model.ChartNo) 
 </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>

Controller

public ActionResult Create() 
        { 
            // List<SelectListItem> item = new SelectList(db.eCharts, \"ChartNo\"); 
  
          //   ViewBag.ChartNo = item; 
            //ViewData[\"ChartNo\"] = new SelectList(db.eCharts, \"ChartNo\", \"PatientFirstName\"); 
  
          ViewData[\"ChartNo\"] = new SelectList(db.eCharts, \"ChartNo\", \"ChartNo\"); 
  
            
            return View(); 
}

Hi,

I have spent close to 10 hours on this, read close to 100 pages in google and still not able to resolve.

error message - Additional information: There is no ViewData item of type 'IEnumerable<SelectListItem>' that has the key 'ChartNo'

My Classes.

1st class

public class eChart
{
[Key]
[Display(Name="Chart No.")]
public int ChartNo { get; set; }

[Required, StringLength(25), Display(Name="First Name")]
public string PatientFirstName { get; set; }

[Required, StringLength(25), Display(Name = "Last Name")]
public string PatientLastName { get; set; }

[Required(ErrorMessage = "Mobile is required")]
[RegularExpression(@"^$?([0-9]{3})$?[-. ]?([0-9]{3})[-. ]?([0-9]{4})$", ErrorMessage = "Entered phone format is not valid.")]
[DataType(DataType.PhoneNumber)]
[Display(Name = "Phone number")]
public string PatientPhoneNo { get; set; }

public virtual ICollection<treatment> Treatments { get; set; }
}

2nd class

public class Treatment
{
[Key]
public int TreatmentNo { get; set; }

[Required, Display(Name="Treatment Status")]
public string TreatmentStatus { get; set; }

[Display(Name = "Initial Visit Date")]
public DateTime InitialVisit { get; set; }

[Display(Name = "Last Visit Date")]
public DateTime LastVisit { get; set; }

[Display(Name = "Next Visit Date")]
public DateTime NextVisit { get; set; }

public int ChartNo { get; set; }

public virtual eChart eChart { get; set; }

}
Views

Index (has tabs, and one of the tab uses partial view)

@{
ViewBag.Title = "eChartHome";
Layout = "~/Views/Shared/_Layout.cshtml";
}

<div class="container">
<!-------->
<div id="content">
<ul id="tabs" class="nav nav-tabs" data-tabs="tabs">
<li class="active"><a href="#search" data-toggle="tab">Search</a></li>
<li><a href="#createupdatechart" data-toggle="tab">Create / Update - Chart</a></li>
<li><a href="#treatments" data-toggle="tab">Treatments</a></li>
</ul>
<div id="my-tab-content" class="tab-content">

@* Create / Update Tab - Start here*@
<div class="tab-pane" id="createupdatechart">
@* <h3 class="text-success">Create a new chart!</h3>*@

<div class="container">
<div class="row">
<div class="col-md-9">
<div class="panel panel-info">
<div class="panel-heading">
<h5>Create a new Chart.</h5>
</div>
<div class="panel-body">
@Html.Partial("_createChartPartial")
</div>
</div>
</div>

</div>
</div>
</div>
@* Create / Update Tab - Ends here*@

<div class="tab-pane" id="treatments">
@* <h3 class="text-success">Create a new chart!</h3>*@

<div class="container">
<div class="row">
<div class="col-md-9">
<div class="panel panel-info">
<div class="panel-heading">
<h5>Create a new Treatment.</h5>
</div>
<div class="panel-body">
@Html.Partial("_createTreatmentPartial")   @* here i am calling the partial view.. this is the one throws error. If I simply type "body text", it works. 
</div>
</div>
</div>

</div>
</div>
</div>
@* Create / Update Tab - Ends here*@


</div>
<script type="text/javascript">
jQuery(document).ready(function ($) {
$('#tabs').tab();
});
</script>
</div> <!-- container -->

Partial view

@model ModalBootstrap.Models.Treatment

@using (Html.BeginForm()) 
{
@Html.AntiForgeryToken()

<div class="form-horizontal">
<h4>Treatment</h4>

@Html.ValidationSummary(true)

<div class="form-group">
@Html.LabelFor(model => model.TreatmentStatus, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.TreatmentStatus)
@Html.ValidationMessageFor(model => model.TreatmentStatus)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.ChartNo, "ChartNo", new { @class = "control-label col-md-2" })
<div class="col-md-10">
@* @Html.DropDownList(model => model.ChartNo, ViewData["ChartNo"] as SelectList)*@*

@Html.DropDownList("ChartNo") @* I have tried all these different ways...nothing works!!*@
@* @Html.DropDownList("ChartNo", ViewBag.Roles as SelectList)
@Html.DropDownList("ChartNo", null, "Select Chart", null)*@
@Html.ValidationMessageFor(model => model.ChartNo)
</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>

Controller

public ActionResult Create()
       {
           // List<SelectListItem> item = new SelectList(db.eCharts, "ChartNo");

         //   ViewBag.ChartNo = item;
           //ViewData["ChartNo"] = new SelectList(db.eCharts, "ChartNo", "PatientFirstName");

         ViewData["ChartNo"] = new SelectList(db.eCharts, "ChartNo", "ChartNo");

          
           return View();
       }

解决方案

", ErrorMessage = "Entered phone format is not valid.")]
[DataType(DataType.PhoneNumber)]
[Display(Name = "Phone number")]
public string PatientPhoneNo { get; set; }

public virtual ICollection<treatment> Treatments { get; set; }
}

2nd class

public class Treatment
{
[Key]
public int TreatmentNo { get; set; }

[Required, Display(Name="Treatment Status")]
public string TreatmentStatus { get; set; }

[Display(Name = "Initial Visit Date")]
public DateTime InitialVisit { get; set; }

[Display(Name = "Last Visit Date")]
public DateTime LastVisit { get; set; }

[Display(Name = "Next Visit Date")]
public DateTime NextVisit { get; set; }

public int ChartNo { get; set; }

public virtual eChart eChart { get; set; }

}
Views

Index (has tabs, and one of the tab uses partial view)
@{
ViewBag.Title = "eChartHome";
Layout = "~/Views/Shared/_Layout.cshtml";
}

<div class="container">

<div id="content">
<ul id="tabs" class="nav nav-tabs" data-tabs="tabs">
<li class="active"><a href="#search" data-toggle="tab">Search</a></li>
<li><a href="#createupdatechart" data-toggle="tab">Create / Update - Chart</a></li>
<li><a href="#treatments" data-toggle="tab">Treatments</a></li>
</ul>
<div id="my-tab-content" class="tab-content">

@* Create / Update Tab - Start here*@
<div class="tab-pane" id="createupdatechart">
@* <h3 class="text-success">Create a new chart!</h3>*@

<div class="container">
<div class="row">
<div class="col-md-9">
<div class="panel panel-info">
<div class="panel-heading">
<h5>Create a new Chart.</h5>
</div>
<div class="panel-body">
@Html.Partial("_createChartPartial")
</div>
</div>
</div>

</div>
</div>
</div>
@* Create / Update Tab - Ends here*@

<div class="tab-pane" id="treatments">
@* <h3 class="text-success">Create a new chart!</h3>*@

<div class="container">
<div class="row">
<div class="col-md-9">
<div class="panel panel-info">
<div class="panel-heading">
<h5>Create a new Treatment.</h5>
</div>
<div class="panel-body">
@Html.Partial("_createTreatmentPartial")   @* here i am calling the partial view.. this is the one throws error. If I simply type "body text", it works. 
</div>
</div>
</div>

</div>
</div>
</div>
@* Create / Update Tab - Ends here*@


</div>
<script type="text/javascript">
jQuery(document).ready(function (

) {

('#tabs').tab(); }); </script> </div>

Partial view

@model ModalBootstrap.Models.Treatment

@using (Html.BeginForm()) 
{
@Html.AntiForgeryToken()

<div class="form-horizontal">
<h4>Treatment</h4>

@Html.ValidationSummary(true)

<div class="form-group">
@Html.LabelFor(model => model.TreatmentStatus, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.TreatmentStatus)
@Html.ValidationMessageFor(model => model.TreatmentStatus)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.ChartNo, "ChartNo", new { @class = "control-label col-md-2" })
<div class="col-md-10">
@* @Html.DropDownList(model => model.ChartNo, ViewData["ChartNo"] as SelectList)*@*

@Html.DropDownList("ChartNo") @* I have tried all these different ways...nothing works!!*@
@* @Html.DropDownList("ChartNo", ViewBag.Roles as SelectList)
@Html.DropDownList("ChartNo", null, "Select Chart", null)*@
@Html.ValidationMessageFor(model => model.ChartNo)
</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>

Controller

public ActionResult Create()
       {
           // List<SelectListItem> item = new SelectList(db.eCharts, "ChartNo");

         //   ViewBag.ChartNo = item;
           //ViewData["ChartNo"] = new SelectList(db.eCharts, "ChartNo", "PatientFirstName");

         ViewData["ChartNo"] = new SelectList(db.eCharts, "ChartNo", "ChartNo");

          
           return View();
       }

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没有类型为'IEnumerable< SelectListItem>'的ViewData项 [英] There is no ViewData item of type 'IEnumerable<SelectListItem>'

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没有类型为'IEnumerable&lt; SelectListItem&gt;'的ViewData项 [英] There is no ViewData item of type &#39;IEnumerable&lt;SelectListItem&gt;&#39;

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没有类型为'IEnumerable< SelectListItem>'的ViewData项 [英] There is no ViewData item of type 'IEnumerable<SelectListItem>'

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