RazorHelper.cs

完整版 RazorHelper.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using RazorEngine;
using RazorEngine.Text;

namespace Console_Core.Common
{
    public class RazorHelper
    {
        /// <summary>
        /// Razor解析cshtml页面，并输出到浏览器
        /// </summary>
        /// <param name="context">上下文</param>
        /// <param name="cshtmlVirtualPath">cshtml页面的虚拟路径</param>
        /// <param name="data">传递的虚拟实例</param>
        public static void RazorParse(HttpContext context, string cshtmlVirtualPath, object data)
        {
            string fullPath = context.Server.MapPath(cshtmlVirtualPath);
            string cshtml = File.ReadAllText(fullPath);
            string cacheName = fullPath + File.GetLastWriteTime(fullPath);
            string html = Razor.Parse(cshtml, data, cacheName);
            context.Response.Write(html);
        }

        /// <summary>
        /// 对html进行加密
        /// </summary>
        /// <param name="htmlStr">html标签</param>
        /// <returns>加密之后的字符串</returns>
        public static HtmlEncodedString HtmlEncodedString(string htmlStr)
        {
            return new HtmlEncodedString(htmlStr);
        }

        /// <summary>
        /// 对html原样显示
        /// </summary>
        /// <param name="htmlStr">html标签</param>
        /// <returns>html原来样子</returns>
        public static RawString RawString(string htmlStr)
        {
            return new RawString(htmlStr);
        }

        /// <summary>
        /// 拼接生成CheckBox 标签
        /// </summary>
        /// <param name="isCheck">是否选中</param>
        /// <param name="extendProperties">扩展属性的对象：比如，new {id='managerId',name='manager',style='color:red' }</param>
        /// <returns>CheckBox标签</returns>
        public static RawString CheckBox(bool isCheck, object extendProperties)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("<input type='checkbox' ");
            sb.Append(RenderExtProperties(extendProperties));
            if(isCheck)
            {
                sb.Append(" checked ");
            }
            sb.AppendLine(" />");
            return new RawString(sb.ToString());
        }

        /// <summary>
        /// 拼接扩展属性 及对应的值
        /// </summary>
        /// <param name="extendProperties">扩展属性 所在的匿名实例</param>
        /// <returns>拼接生成的 包含属性名和值 的字符串： 比如，“ name='manager' id='managerId' ” </returns>
        private static string RenderExtProperties(object extendProperties)
        {
            StringBuilder sb = new StringBuilder();
            #region 拼接扩展属性
            Type extType = extendProperties.GetType();
            PropertyInfo[] props = extType.GetProperties();
            foreach (PropertyInfo prop in props)
            {
                string extPropName = prop.Name;
                object extPropValue = prop.GetValue(extendProperties);
                sb.Append(" ").Append(extPropName).Append("='").Append(extPropValue).Append("' ");
            }
            #endregion
            return sb.ToString();
        }

        /// <summary>
        /// 拼接生成DropDownList下拉列表 标签
        /// </summary>
        /// <param name="list">实例的集合</param>
        /// <param name="valuePropName">实际的值属性的名称：比如，Id</param>
        /// <param name="textPropName">显示的文本属性的名称：比如，Name</param>
        /// <param name="selectedValue">选中的值</param>
        /// <param name="extendProperties">扩展属性的对象：比如，new {id='managerId',name='manager',style='color:red' }</param>
        /// <returns>DropDownList下拉列表 标签</returns>
        public static RawString DropDownList(IEnumerable list,string valuePropName,string textPropName,object selectedValue,object extendProperties)
        { 
            //<select name='' id='' >
            //<option value=''> </option> 
            //</select>
            StringBuilder sb = new StringBuilder();
            sb.Append("<select ");
            #region 拼接扩展属性
            sb.Append(RenderExtProperties(extendProperties));
            #endregion
            sb.AppendLine(" >");
            #region 拼接下拉选项
            foreach (object item in list)
            {
                object valuePropValue, textPropValue;
                GetvalueAndTextPropValue(item, valuePropName, textPropName, out valuePropValue, out textPropValue);
                sb.Append("<option value='").Append(valuePropValue).Append("' ");
                if(object.Equals(valuePropValue,selectedValue)) //如果当前值与选中的值相等，则selected （引用类型用equal，如果用=则是不同的实例，因为发生过装箱）
                {
                    sb.Append(" selected ");
                }
                sb.Append(">").Append(textPropValue).AppendLine(" </option> ");
            } 
            #endregion
            sb.AppendLine("</select>");
            return new RawString(sb.ToString());
        }

        /// <summary>
        /// 拼接生成RadioButtonList 标签
        /// </summary>
        /// <param name="list">实例的集合</param>
        /// <param name="valuePropName">实际的值属性的名称：比如，Id</param>
        /// <param name="textPropName">显示的文本属性的名称：比如，Name</param>
        /// <param name="selectedValue">选中的值</param>
        // <param name="extendProperties">扩展属性的对象：比如，new {name='gender',style='color:red' }</param>
        /// <returns>RadioButtonList 标签</returns>
        public static RawString RadioButtonList(IEnumerable list, string valuePropName, string textPropName, object selectedValue, object extendProperties)
        {
            //<input type="radio" name="gender" value="1" checked /><label>男</label><br />  //只能单选
            StringBuilder sb = new StringBuilder();
            foreach(object item in list)
            {
                object valuePropValue, textPropValue;
                GetvalueAndTextPropValue(item, valuePropName, textPropName, out valuePropValue, out textPropValue);
                sb.Append("<input type="radio" ");
                sb.Append(RenderExtProperties(extendProperties));
                sb.Append(" value="").Append(valuePropValue).Append(""");
                if(object.Equals(valuePropValue,selectedValue))
                {
                    sb.Append(" checked ");
                }
                sb.Append(" /><label>").Append(textPropValue).AppendLine("</label><br />");
            }
            return new RawString(sb.ToString());
        }

        /// <summary>
        /// 拼接生成CheckBoxList 标签
        /// </summary>
        /// <param name="list">实例的集合</param>
        /// <param name="valuePropName">实际的值属性的名称：比如，Id</param>
        /// <param name="textPropName">显示的文本属性的名称：比如，Name</param>
        /// <param name="selectedValues">选中的值的数组</param>
        /// <param name="extendProperties">扩展属性的对象：比如，new {name='hobby',style='color:red' }</param>
        /// <returns>CheckBoxList 标签</returns>
        public static RawString CheckBoxList(IEnumerable list, string valuePropName, string textPropName, object[] selectedValues, object extendProperties)
        {
            //<input type="checkbox" name="hobby" value="1" checked /><label>足球</label><br />   //可多选
            StringBuilder sb = new StringBuilder();
            foreach(object item in list)
            {
                object valuePropValue,textPropValue;
                GetvalueAndTextPropValue(item, valuePropName, textPropName, out valuePropValue, out textPropValue);
                sb.Append("<input type="checkbox" ");
                sb.Append(RenderExtProperties(extendProperties));
                sb.Append (" value="").Append(valuePropValue).Append("" ");
                if(selectedValues.Contains(valuePropValue))
                {
                    sb.Append(" checked ");
                }
                sb.Append(" /><label>").Append(textPropValue).AppendLine("</label><br />");
            }
            return new RawString(sb.ToString());
        }

        /// <summary>
        /// 根据指定实例的 值属性名和文本属性名 获得 值属性值和文本属性值
        /// </summary>
        /// <param name="item">指定实例</param>
        /// <param name="valuePropName">值属性名</param>
        /// <param name="textPropName">文本属性名</param>
        /// <param name="valuePropValue">out 值属性值</param>
        /// <param name="textPropValue">out 文本属性值</param>
        private static void GetvalueAndTextPropValue(object item, string valuePropName, string textPropName, out object valuePropValue, out object textPropValue)
        {
            Type type = item.GetType();
            PropertyInfo valueProp = type.GetProperty(valuePropName);
            valuePropValue = valueProp.GetValue(item);
            PropertyInfo textProp = type.GetProperty(textPropName);
            textPropValue = textProp.GetValue(item);
        }
    }
}