本文介绍了创建一个助手来覆盖CheckboxFor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

我使用的引导5在一个新的项目我开始,而非不必编写围绕表单域所有的脚手架,我决定创建一个包装自动为我做到这一点。

I am using bootstrap 5 in a new project I am starting, and rather than having to write all the scaffolding around a form field, I have decided to create a wrapper to do this for me automatically.

我已经使用textboxfor,textareafor和DropDownList的语法如下:

I have used the following syntax for textboxfor, textareafor and dropdownlist:

public static MvcHtmlString MyTextBoxFor<TModel, TProperty>(
        this HtmlHelper<TModel> helper,
        Expression<Func<TModel, TProperty>> expression)
    {
        var stringbuilder = new MvcHtmlString("<div class='form-group'>" +
                                                    helper.LabelFor(expression, new {@class = "col-sm-3 control-label"}) +
                                                    "<div class='col-sm-5'>" +
                                                        helper.TextBoxFor(expression, new {@class = "form-control"}) +
                                                    "</div>" +
                                              "</div>");

        return stringbuilder;
    }

如下然后可以叫:

Which can then be called as follows:

@ FormHelpers.MyTextBoxFor(HTML,X =&GT; x.Name)

然而,这不会出现对checkboxfor工作:

However this does not appear to work for checkboxfor:

错误1'System.Web.Mvc.HtmlHelper&LT;&的TModel GT;'不包含'CheckBoxFor'和最佳推广方法重载的定义'System.Web.Mvc.Html.InputExtensions.CheckBoxFor<TModel>(System.Web.Mvc.HtmlHelper<TModel>, System.Linq.Ex pressions.Ex pression&LT; System.Func&LT;的TModel,布尔&GT;&GT;)'有一些无效参数

如果我更改 TProperty 布尔它会再编译,但我得到上线,其中运行时错误我把这个助手:

If I change TProperty to bool it will then compile, but I get a runtime error on the line where I call this helper:

CS0411:该类型参数的方法'CollectionSystem.Helpers.FormHelpers.MyCheckboxFor<TModel,TProperty>(System.Web.Mvc.HtmlHelper<TModel>, System.Linq.Ex pressions.Ex pression&所述; System.Func&下;的TModel,布尔&GT;&GT)'不能从使用中推断出来。尝试显式指定类型参数。

能有人建议我怎么能去包裹CheckboxFor功能吧。

Can someone advise how I can go about wrapping the CheckboxFor function please.

推荐答案

您帮助需要像

public static MvcHtmlString BootstrapCheckBoxFor<TModel>(this HtmlHelper<TModel> helper, Expression<Func<TModel, bool>> expression)
{

  TagBuilder innerContainer = new TagBuilder("div");
  innerContainer.AddCssClass("col-sm-5");
  innerContainer.InnerHtml = helper.CheckBoxFor(expression, new {@class = "form-control"}).ToString();

  StringBuilder html = new StringBuilder();
  html.Append(helper.LabelFor(expression, new {@class = "col-sm-3 control-label"}));
  html.Append(innerContainer.ToString());

  TagBuilder outerContainer = new TagBuilder("div");
  outerContainer.AddCssClass("form-group");
  outerContainer.InnerHtml = html.ToString();

  return MvcHtmlString.Create(outerContainer.ToString());

}

请注意您可能需要编辑这包括 @ Html.ValidationMessageFor()

Note you may want to edit this to include @Html.ValidationMessageFor()

这篇关于创建一个助手来覆盖CheckboxFor的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

09-15 05:29