一步一步封装自己的HtmlHelper组件BootstrapHelper（二(2)

using System; using System.Collections.Generic; using System.Linq; using System.Linq.Expressions; using System.Reflection; using System.Web; using System.Web.Mvc; namespace BootstrapExtensions { /// <summary> /// Bootstrap表单元素Input扩展方法集合 /// </summary> public static class InputExtensions { public static MvcHtmlString Helper(BootstrapHelper html, InputType inputType, string id, string name, object value, bool isCheck, IDictionary<string, object> htmlAttributes) { //定义标签的名称 TagBuilder tag = new TagBuilder("input"); if (htmlAttributes == null) { htmlAttributes = new Dictionary<string, object>(); } //添加name if (!string.IsNullOrEmpty(name)) { htmlAttributes.Add("name", name); } //添加id if (!string.IsNullOrEmpty(id)) { htmlAttributes.Add("id", id); } //添加value if (value != null) { htmlAttributes.Add("value", value.ToString()); } //添加input的类型 tag.MergeAttribute("type", HtmlHelper.GetInputTypeString(inputType)); //添加默认样式 tag.AddCssClass("form-control"); tag.MergeAttributes(htmlAttributes); if (inputType == InputType.Radio || inputType == InputType.CheckBox) { if (isCheck) tag.MergeAttribute("checked", "checked"); } return MvcHtmlString.Create(tag.ToString()); } /// <summary> /// 返回表单radio标签 /// </summary> /// <param>扩展方法实例</param> /// <param>id</param> /// <param>name属性</param> /// <param>input的value值</param> /// <param>显示文本</param> /// <param>label标签的样式</param> /// <param>是否选中</param> /// <param>是否禁用</param> /// <param>额外标签</param> /// <returns>返回radio标签</returns> public static MvcHtmlString CheckBox(BootstrapHelper html, InputType inputType, string id, string name, object value, string text, string labelClass, bool isCheck, bool isDisabled, IDictionary<string, object> htmlAttributes) { //定义标签的名称 TagBuilder tag = new TagBuilder("label"); if (!string.IsNullOrEmpty(labelClass)) { htmlAttributes.Add("class", labelClass); } System.Text.StringBuilder sbInput = new System.Text.StringBuilder(); var strInputType = HtmlHelper.GetInputTypeString(inputType); sbInput.Append("<input type='").Append(strInputType).Append("'"); if (!string.IsNullOrEmpty(name)) { sbInput.Append(" name = '").Append(name).Append("'"); } if (!string.IsNullOrEmpty(id)) { sbInput.Append(" id = '").Append(id).Append("'"); } if (value != null) { sbInput.Append(" value = '").Append(value.ToString()).Append("'"); } if (isCheck) { sbInput.Append(" checked = 'checked'"); } if (isDisabled) { sbInput.Append(" disabled"); } sbInput.Append(" />"); if (!string.IsNullOrEmpty(text)) { sbInput.Append(text); } tag.InnerHtml = sbInput.ToString(); tag.MergeAttributes(htmlAttributes); return MvcHtmlString.Create(tag.ToString()); } //通过表达式取当前的属性值 public static void GetValueByExpression<TModel, TProperty>(Expression<Func<TModel, TProperty>> expression, TModel model, out string propertyName, out object value) { MemberExpression body = (MemberExpression)expression.Body; var lamadaName = (body.Member is PropertyInfo) ? body.Member.Name : null; propertyName = lamadaName; value = null; System.Reflection.PropertyInfo[] lstPropertyInfo = typeof(TModel).GetProperties(BindingFlags.Public | BindingFlags.Instance); var oFind = lstPropertyInfo.FirstOrDefault(x => x.Name == lamadaName); if (oFind != null) { value = oFind.GetValue(model, null); } } } }