DropDownListForModel无法添加HTML属性

Question

我试图将html属性添加到该下拉列表中，如下所示：

@Html.DropDownListForModel(p => p.PreviousCompanyCompletedMappingId, Model.PreviousCompanyMappings.ToSelectListItems(), new { @class = "dropdown" })

但是我遇到了错误：Argument 4: cannot convert from '<anonymous type: string class>' to 'string'

Answer 1

编译器在识别要使用的正确方法重载时遇到问题。为import { formValueSelector } from 'redux-form' // ES6 const mapStateToProps = state => { const selector = formValueSelector('myFormName') const firstName = selector(state, 'firstname') return { firstName } } 参数明确指定null。

optionLabel