.net中以扩展CheckBoxListFor为例
public static MvcHtmlString CheckBoxListFor<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, IEnumerable<SelectListItem> items, object htmlAttributes) { var result = new StringBuilder(); string name = ExpressionHelper.GetExpressionText(expression); var modelData = ModelMetadata.FromLambdaExpression<TModel, TProperty>(expression, htmlHelper.ViewData).Model; List<string> currentValues = StringHelper.StringSplit<string>(modelData == null ? string.Empty : modelData.ToString()); foreach (var item in items) { if (currentValues.Contains(item.Value)) result.AppendFormat("<label class=\"checkbox-inline checkbox-styled\"><input type=\"checkbox\" name=\"{0}\" value=\"{1}\" checked><span class=‘text‘>{2}</span></label>", name, item.Value, item.Text); else result.AppendFormat("<label class=\"checkbox-inline checkbox-styled\"><input type=\"checkbox\" name=\"{0}\" value=\"{1}\"><span class=‘text‘>{2}</span></label>", name, item.Value, item.Text); } return MvcHtmlString.Create(result.ToString()); }
netcore 2中以扩展CheckBoxListFor为例
public static IHtmlContent CheckBoxListFor<TModel, TProperty> (this IHtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, IEnumerable<SelectListItem> items, object htmlAttributes) { var result = new StringBuilder(); string name = ExpressionHelper.GetExpressionText(expression); var modelData = ExpressionMetadataProvider.FromLambdaExpression<TModel, TProperty>(expression, htmlHelper.ViewData, htmlHelper.MetadataProvider).Model; List<string> currentValues = StringHelper.StringSplit<string>(modelData == null ? string.Empty : modelData.ToString()); foreach (var item in items) { if (currentValues.Contains(item.Value)) result.AppendFormat("<label class=\"checkbox-inline checkbox-styled\"><input type=\"checkbox\" name=\"{0}\" value=\"{1}\" checked><span class=‘text‘>{2}</span></label>", name, item.Value, item.Text); else result.AppendFormat("<label class=\"checkbox-inline checkbox-styled\"><input type=\"checkbox\" name=\"{0}\" value=\"{1}\"><span class=‘text‘>{2}</span></label>", name, item.Value, item.Text); } return new HtmlString(result.ToString()); }
netcore 3中以扩展CheckBoxListFor为例
public static IHtmlContent CheckBoxListFor<TModel, TProperty> (this IHtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, IEnumerable<SelectListItem> items, object htmlAttributes) { var result = new StringBuilder(); ModelExpressionProvider modelExpressionProvider = (ModelExpressionProvider)htmlHelper.ViewContext.HttpContext.RequestServices.GetService(typeof(IModelExpressionProvider)); var modelData = modelExpressionProvider.CreateModelExpression(htmlHelper.ViewData, expression).Model; var name=modelExpressionProvider.GetExpressionText(expression); List<string> currentValues = ((modelData == null) ? string.Empty : modelData.ToString()).Split<string>(Array.Empty<string>()); foreach (var item in items) { if (currentValues.Contains(item.Value)) result.AppendFormat("<label class=\"checkbox-inline checkbox-styled\"><input type=\"checkbox\" name=\"{0}\" value=\"{1}\" checked><span class=‘text‘>{2}</span></label>", name, item.Value, item.Text); else result.AppendFormat("<label class=\"checkbox-inline checkbox-styled\"><input type=\"checkbox\" name=\"{0}\" value=\"{1}\"><span class=‘text‘>{2}</span></label>", name, item.Value, item.Text); } return new HtmlString(result.ToString()); }
原文地址:https://www.cnblogs.com/zzxulong/p/12174575.html
时间: 2024-11-06 13:31:51