Mikel
[转载].NET MVC3 中扩展一个HtmlHelper方法CheckBoxList – 单程列车 – 博客园.
MVC中有DropDownList方法，挺好用，可是最常用的需求，一组checkboxlist咋没个类似方法呢？郁闷之余，自己做一个吧，直接上代码，呵呵
public static MvcHtmlString CheckBoxList(this HtmlHelper helper, string name, IEnumerableselectList){return CheckBoxList(helper, name, selectList, new { });}public static MvcHtmlString CheckBoxList(this HtmlHelper helper, string name, IEnumerableselectList, object htmlAttributes){IDictionary HtmlAttributes = HtmlHelper.AnonymousObjectToHtmlAttributes(htmlAttributes);HashSet set = new HashSet();Listlist = new List();string selectedValues = Convert.ToString((selectList as SelectList).SelectedValue);if (!string.IsNullOrEmpty(selectedValues)){if (selectedValues.Contains(",")){string[] tempStr = selectedValues.Split(',');for (int i = 0; i < tempStr.Length; i++){set.Add(tempStr[i]);}}else{set.Add(selectedValues);}}foreach (SelectListItem item in selectList){item.Selected = (item.Value != null) ? set.Contains(item.Value) : set.Contains(item.Text);list.Add(item);}selectList = list;HtmlAttributes.Add("type", "checkbox");HtmlAttributes.Add("id", name);HtmlAttributes.Add("name", name);HtmlAttributes.Add("style", "margin:0 0 0 10px;line-height:30px; vertical-align:-8px;border:none;");StringBuilder stringBuilder = new StringBuilder();foreach (SelectListItem selectItem in selectList){IDictionary newHtmlAttributes = HtmlAttributes.DeepCopy();newHtmlAttributes.Add("value", selectItem.Value);if(selectItem.Selected){newHtmlAttributes.Add("checked", "checked");}TagBuilder tagBuilder = new TagBuilder("input");tagBuilder.MergeAttributes(newHtmlAttributes);string inputAllHtml= tagBuilder.ToString(TagRenderMode.SelfClosing);stringBuilder.AppendFormat(@"<label> {0} {1}</label>",inputAllHtml, selectItem.Text);}return MvcHtmlString.Create(stringBuilder.ToString());}private static IDictionary DeepCopy(this IDictionary ht){Dictionary _ht=new Dictionary();foreach (var p in ht){_ht.Add(p.Key, p.Value);}return _ht;} |
可以直接拿去用
生成的每一个checkbox外部都有一个label，感觉不错，不喜欢可以去掉，还有一个 HtmlAttributes.Add(“style”, “margin:0 0 0 10px;line-height:30px; vertical-align:-8px;border:none;”); 是为了让显示更好看的，如果在你的样式下面位置不好看你可以把这行去掉
