c# - Automapper、Mapper 未初始化。使用正确的配置调用初始化

Question

当我尝试将数据提交到数据库时出现以下错误:

{"Success":false,"Error":true,"ErrorType":2,"Message":"System.InvalidOperationException: Mapper not initialized. Call Initialize with appropriate configuration. If you are trying to use mapper instances through a container or otherwise, make sure you do not have any calls to the static Mapper.Map methods, and if you\u0027re using ProjectTo or UseAsDataSource extension methods, make sure you pass in the appropriate IConfigurationProvider instance.\r\n at AutoMapper.Mapper.get_Instance()\r\n at AutoMapper.Mapper.Map(Object source, Object destination, Type sourceType, Type destinationType)\r\n at GoalPear.Web.Areas.PM.Controllers.CompanyController.SaveData(CompanyFormViewModel companyFormViewModel)

请告诉我为什么会出现此错误，因为我付出了很多努力仍无法弄清楚。

这是我的 Controller 代码

public CompanyController() { }
private readonly ICompanyService _companyService;
public CompanyController(ICompanyService companyService) {
    _companyService = companyService;
}

这是 Controller 中的 SaveData 方法

[HttpPost]
public JsonResult SaveData(CompanyFormViewModel companyFormViewModel)
{
    try
    {
        int? id = null;
        Company company;
        if (companyFormViewModel.Id == null)
        {
            company = new Company();
        }
        else
        {
            id = (int)companyFormViewModel.Id;
            company = _companyService.GetCompany((int)id);
        }

        company = (Company)Mapper.Map(
            companyFormViewModel, 
            company, 
            typeof(CompanyFormViewModel), 
            typeof(Company));
        CompanyValidator companyValidator = new CompanyValidator();
        ValidationResult validationResult = companyValidator.Validate(company);

        if (validationResult.IsValid) //check for any validation errors
        {
            if (id == null)
            {
                _companyService.CreateCompany(company);
            }
            else
            {
                _companyService.Update(company);
            }

            _companyService.SaveCompany();
            return new JsonSuccessResult();
        }
        else
        {
            Response.StatusCode = (int)ResponseCode.UnprocessableEntity;
            return new JsonErrorResult(validationResult);
        }
    }
    catch (Exception ex)
    {
        Response.StatusCode = (int)ResponseCode.UnprocessableEntity;
        return new JsonErrorResult(ex.ToString());
    }
}

我的表单 View 代码

@using (Html.BeginForm("SaveData", "Company", FormMethod.Post, new { @class = "", @id = "validate", @role = "form" })) { 
@*<form id="validate" method="POST" action="javascript:alert('Form #validate submited');">*@
<div class="head tac">
    <h1>Register Your Company With Us!!!</h1>
</div>
<div class="block">
    <div class="header">
        <div class="side pull-right">
            <button class="btn btn-default btn-clean" onclick="clear_form('#validate');" type="button">Clear form</button>
    </div>
</div>

<div class="content controls">
    <div class="form-row">
        <div class="col-md-3">Company Name:</div>
            <div class="col-md-9">
                @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "validate[required,maxSize[100]]", @placeholder = @Html.DisplayNameFor(model => model.Name) } })

            </div>
        </div>
        <div class="form-row">
            <div class="col-md-3">Owner Name:</div>
                <div class="col-md-9">
                    @Html.EditorFor(model => model.Owner, new { htmlAttributes = new { @class = "validate[required,maxSize[60]]", @placeholder = @Html.DisplayNameFor(model => model.Owner) } })

                </div>
            </div>
            <div class="form-row">
                <div class="col-md-3">Email:</div>
                    <div class="col-md-4">
                        @Html.EditorFor(model => model.Email, new { htmlAttributes = new { @class = "validate[required,maxSize[60]]" ,@type="email", @placeholder = @Html.DisplayNameFor(model => model.Email) } })
                    </div>
                </div>
                <div class="form-row">
                    <div class="col-md-3">Password:</div>
                    <div class="col-md-9">
                        @Html.EditorFor(model => model.Password, new { htmlAttributes = new { @class = "validate[required,maxSize[100]]", @type="password", @id="password", @placeholder = @Html.DisplayNameFor(model => model.Password) } })


                    </div>
                </div>
                <div class="form-row">
                    <div class="col-md-3">Confirm Password:</div>
                    <div class="col-md-9">
                        @Html.EditorFor(model => model.Password, new { htmlAttributes = new { @class = "validate[required,equals[password]]", @type = "password", @placeholder = @Html.DisplayNameFor(model => model.Password) } })

                    </div>
                </div>
        @* I have omitted some code from here for saving your time to read*@  

                <div class="form-row">
                    <div class="col-md-3">Address:</div>
                    <div class="col-md-9">

                        @Html.EditorFor(model => model.Address, new { htmlAttributes = new { @class = "validate[required,maxSize[60]]", @placeholder = @Html.DisplayNameFor(model => model.Address) } })
                    </div>
                </div>
            </div>
            <div class="footer">
                <div class="side pull-right">
                    <div class="btn-group">
                        <button class="btn btn-default" type="button" onclick="$('#validate').validationEngine('hide');">Hide prompts</button>
                        <button class="btn btn-success" type="submit">Submit</button>
                    </div>
                </div>
            </div>
        </div>
   }

这是我的公司型号代码

public string Name {get;set;}
public string Logo { get; set; }
public string Address { get; set; }
public string Owner { get; set; }
public int Size { get; set; }
public string Email { get; set; }
public int Phone { get; set; }
public int FaxNo { get; set; }
public string Password { get; set; }
public string Country { get; set; }
public string State { get; set; }

这是 ViewModel 代码

public CompanyFormViewModel() { }
public int? Id { get; set; }
[DisplayName(" Company Name")]
public string Name { get; set; }
[DisplayName("Owner")]
public string Owner { get; set; }
[DisplayName("Email")]
public string Email { get; set; }
[DisplayName("Password")]
public string Password { get; set; }
[DisplayName("Address")]
public string Address { get; set; }

这是 DomainToViewModelMapping 配置文件

cfg.CreateMap<Company, CompanyFormViewModel>()
    .ForMember(vm => vm.Id, map => map.MapFrom(m => m.Id))
    .ForMember(vm => vm.Name, map => map.MapFrom(m => m.Name))
    .ForMember(vm => vm.Owner, map => map.MapFrom(m => m.Owner))
    .ForMember(vm => vm.Email, map => map.MapFrom(m => m.Email))
    .ForMember(vm => vm.Password, map => map.MapFrom(m => m.Password))
    .ForMember(vm => vm.Address, map => map.MapFrom(m => m.Address));

我的 viewModeltoDomainMapping 配置文件

cfg.CreateMap<CompanyFormViewModel, Company>()
    .ForMember(m => m.Id, map => map.MapFrom(vm => vm.Id))
    .ForMember(m => m.Name, map => map.MapFrom(vm => vm.Name))
    .ForMember(m => m.Owner, map => map.MapFrom(vm => vm.Owner))
    .ForMember(m => m.Email, map => map.MapFrom(vm => vm.Email))
    .ForMember(m => m.Password, map => map.MapFrom(vm => vm.Password))
    .ForMember(m => m.Address, map => map.MapFrom(vm => vm.Address));

为什么我会收到映射器未初始化的错误消息？

Answer 1

看不到您在哪里初始化映射。

解决方案:

您可以创建您的映射配置文件，例如:

public class MappingProfile : Profile
{
    public MappingProfile()
    {
       CreateMap<Company, CompanyFormViewModel>()
          .ForMember(vm => vm.Id, map => map.MapFrom(m => m.Id))
          .ForMember(vm => vm.Name, map => map.MapFrom(m => m.Name))
          .ForMember(vm => vm.Owner, map => map.MapFrom(m => m.Owner))
          .ForMember(vm => vm.Email, map => map.MapFrom(m => m.Email))
          .ForMember(vm => vm.Password, map => map.MapFrom(m => m.Password))
          .ForMember(vm => vm.Address, map => map.MapFrom(m => m.Address));
       CreateMap<CompanyFormViewModel, Company>()
          .ForMember(m => m.Id, map => map.MapFrom(vm => vm.Id))
          .ForMember(m => m.Name, map => map.MapFrom(vm => vm.Name))
          .ForMember(m => m.Owner, map => map.MapFrom(vm => vm.Owner))
          .ForMember(m => m.Email, map => map.MapFrom(vm => vm.Email))
          .ForMember(m => m.Password, map => map.MapFrom(vm => vm.Password))
          .ForMember(m => m.Address, map => map.MapFrom(vm => vm.Address)); 

    }
}

然后在Global.asax.cs中的mapping profile中初始化

    public class AutoMapperConfiguration
    {
        public static void Configure()
        {
            Mapper.Initialize(x =>
            {
                x.AddProfile<MappingProfile>();
            });

            Mapper.Configuration.AssertConfigurationIsValid();               
        }
    }

最后，不要忘记在您的Application_Start()

中配置自动映射器

//Configure Automapper
AutoMapperConfiguration.Configure();