在ASP.NET Core MVC中选择ENUM Tag Helper [英] Select ENUM Tag Helper in ASP.NET Core MVC
问题描述
我发现很多exemples绑定一个模型到Selectlist,一些使用ENUM,但所有这些都是关于CREATE动作和Im面对EDIT动作的问题。
我的模型
public class ProspectLog
{
public int Id {get;组; }
public int IdProspect {get;组; }
public int IdEmpresa {get;组; }
public DateTime Criado {get;组; }
public string Usuario {get;组; }
public string Descricao {get;组; }
public ETipoLog TipoLog {get;组; }
public enum ETipoLog
{
[Display(Name =CADASTRO)]
Cadastro = 0,
[Display(Name =CONTATO )]
Contato = 1,
[显示(名称= @TROCA ETAPA)]
Troca = 2,
[显示(名称= @QUALIFICAÇÃO)]
Qualifica = 3,
[显示(Name = @EDIÇÃO)]
Edicao = 4
}
}
在我的基于MVC5的旧项目中,我只是在我的视图中使用了这个,这是足够的。
DROPDOWN
< div class =form-group col-sm-6>
< label style =font-weight:bolderfor =txtSituacao>Situação< / label>
@ Html.EnumDropDownListFor(model => model.Situacao,htmlAttributes:new {@class =form-control})
@ Html.ValidationMessageFor(model => model.Situacao, ,new {@class =text-danger})
< / div>
我尝试使用不同的方式,我coudnt设置下拉列表与数据库项选择编辑动作。我试过这样:
< div class =form-group>
< label asp-for =TipoLogclass =col-md-2 control-label>< / label>
< div class =col-md-10>
< select asp-for =TipoLogclass =form-control>< / select>
< span asp-validation-for =TipoLogclass =text-danger>< / span>
< / div>
< / div>
我也尝试过:
< div class =form-group>
< label asp-for =TipoLogclass =col-md-2 control-label>< / label>
< div class =col-md-10>
< select asp-for =TipoLogasp-items =Html.GetEnumSelectList< TipoLog>()>< / select>
< span asp-validation-for =TipoLogclass =text-danger>< / span>
< / div>
< / div>
但是它让我发生编译错误:
我也尝试将模型绑定到控制器上的ViewBag,这样:
控制器:
ViewBag.Log = new SelectList(lista,Id,Nome);
查看:
code>< div class =form-group col-sm-2>
< label asp-for =TipoLogoclass =col-md-2 control-label>< / label>
< select asp-for =TipoLogoasp-items =ViewBag.Logclass =form-control>< / select>
< span asp-validation-for =TipoLogoclass =text-danger>< / span>
< / div>
它的部分工作,下拉列表的项目,但不从数据库中选择正确的项目。它显示列表中的第一个被选中。
最后我找到了解决方案!在我发布这个问题一个月之后,看到很多有相同问题的帖子,我可以找到解决方案。
解决方案不是很明显,但是这样我没有编译错误。从Ivan得到的答案并不错,但是有必要在视图中实例化模型:
@using CRM 。模型;
所以,我的下拉列表:
< select asp-for =TipoLogasp-items =Html.GetEnumSelectList< ETipoLog>()class =form-control>< / select>
你可以看到,Visual Studio告诉我,它非常专业,画在灰色,但没有,我得到编译错误。我希望我可以帮助别人。
I need some help with an ENUM dropdown using Tag Helper.
I found lots exemples binding a model to Selectlist and some using ENUM but all of them, about CREATE action, and Im facing problems with EDIT action.
MY MODEL
public class ProspectLog
{
public int Id { get; set; }
public int IdProspect { get; set; }
public int IdEmpresa { get; set; }
public DateTime Criado { get; set; }
public string Usuario { get; set; }
public string Descricao { get; set; }
public ETipoLog TipoLog { get; set; }
public enum ETipoLog
{
[Display(Name = "CADASTRO")]
Cadastro = 0,
[Display(Name = "CONTATO")]
Contato = 1,
[Display(Name = @"TROCA ETAPA")]
Troca = 2,
[Display(Name = @"QUALIFICAÇÃO")]
Qualifica = 3,
[Display(Name = @"EDIÇÃO")]
Edicao = 4
}
}
On my old project based on MVC5 I just used this on my View and it was enough.
DROPDOWN
<div class="form-group col-sm-6">
<label style="font-weight: bolder" for="txtSituacao">Situação</label>
@Html.EnumDropDownListFor(model => model.Situacao, htmlAttributes: new { @class = "form-control" })
@Html.ValidationMessageFor(model => model.Situacao, "", new { @class = "text-danger" })
</div>
I tried with difent ways and I coudnt set the dropdown with database item select on Edit action. I tried this way:
<div class="form-group">
<label asp-for="TipoLog" class="col-md-2 control-label"></label>
<div class="col-md-10">
<select asp-for="TipoLog" class="form-control"></select>
<span asp-validation-for="TipoLog" class="text-danger"></span>
</div>
</div>
I also tried like that:
<div class="form-group">
<label asp-for="TipoLog" class="col-md-2 control-label"></label>
<div class="col-md-10">
<select asp-for="TipoLog" asp-items="Html.GetEnumSelectList<TipoLog>()"></select>
<span asp-validation-for="TipoLog" class="text-danger"></span>
</div>
</div>
But it ran me to an compilation error:
I also tryed to bind a model a list to a ViewBag on my controller, this way:
CONTROLLER:
ViewBag.Log = new SelectList(lista, "Id", "Nome");
VIEW:
<div class="form-group col-sm-2">
<label asp-for="TipoLogo" class="col-md-2 control-label"></label>
<select asp-for="TipoLogo" asp-items="ViewBag.Log" class="form-control"></select>
<span asp-validation-for="TipoLogo" class="text-danger"></span>
</div>
Its worked partially, the drop down listed the items, but not selecting the correct item from database. it show the first on the list as selected.
Finally I found the solution!!! After one month since I had posted this question, and seeing lots of posts with same problem I could found the solution.
The solution not apear to be obvious but, that way i got no compilation erros. The answer I got from Ivan was not incorrect, but it was necessary to instance the model on the view like:
@using CRM.Model;
So, my dropdown:
<select asp-for="TipoLog" asp-items="Html.GetEnumSelectList<ETipoLog>()" class="form-control"></select>
You can see, Visual Studio told me it eas unessessary, painting it in grey, but without that, i get compilation error. I hope I can help someone else.
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