c#用反射原理递归遍历复杂实体对象

之前在网上看到的都是遍历那种比较简单的实体对象，但是如果有实体嵌套，甚至是包含有List<XXInfo>这种属性的时候就没有办法处理了。通过递归遍历的方式可以完成对复杂实体对象的所有属性的遍历，可以取值和赋值。

下面是关键部分的代码，有什么不对的地方路过的大大一定要指点哈。

using System.Reflection;

public System.Text.StringBuilder strB = new System.Text.StringBuilder();     public void GetInfoPropertys(object objInfo)     {         if (objInfo == null) return;         Type tInfo = objInfo.GetType();         PropertyInfo[] pInfos = tInfo.GetProperties();         if (tInfo.IsGenericType)         {             System.Collections.ICollection Ilist = objInfo as System.Collections.ICollection;             if (Ilist != null)             {                 strB.AppendFormat("集合子属性{0}<br/>", Ilist.Count);                 foreach (object obj in Ilist)                 {                     GetInfoPropertys(obj);                 }             }             else             {                 strB.Append("泛型集合为空<br/>");             }             return;         }         foreach (PropertyInfo pTemp in pInfos)         {             string Pname = pTemp.Name;             string pTypeName = pTemp.PropertyType.Name;             object Pvalue = pTemp.GetValue(objInfo, null);             if (pTemp.PropertyType.IsValueType || pTemp.PropertyType.Name.StartsWith("String"))             {                 string value = (Pvalue == null ? "为空" : Pvalue.ToString());                 strB.AppendFormat("属性名：{0}，属性类型：{1}，属性值：{2}<br/>", Pname, pTypeName, value);             }             else             {                 string value = Pvalue == null ? "为空" : Pvalue.ToString();                 strB.AppendFormat("<br/><b>子类</b>，属性名：{0}，属性类型：{1}，属性值：{2}<br/>", Pname, pTypeName, value);                 strB.Append("----------------------------------------------<br/>");                 GetInfoPropertys(Pvalue);

}

}     }

利用反射实现表格式Excel文档的导出：

上次客户提出了要将数据导出到类似上图的固定格式的Excel文档中，当然真实的表格不是上面那样的，而且表格的格式有十多种，最后采用的解决办法就是利用C#的反射。大概的思路是这样的，为每种导出的表格样式都做一个xml的配置文件，然后记录每个需要复制的文本框的坐标，以及这个值在实体类中的名称，针对上面的那种表格格式，xml配置文件是这样的：

<?xml version="1.0" encoding="utf-8"?> <XML TableName="table1.xml" OtherInfo="">

  <Field Fname="NAME" PropertyName="NAME" Desc="姓名">     <x>4</x>     <y>3</y>   </Field>   <Field Fname="SEX" PropertyName="SEX" Desc="性别">     <x>10</x>     <y>3</y>   </Field>   <Field Fname="BIRTHDAY" PropertyName="BIRTHDAY" Desc="出生年月">     <x>4</x>     <y>4</y>   </Field>   <Field Fname="Zz" PropertyName="Zz" Desc="政治面貌">     <x>10</x>     <y>4</y>   </Field>   <Field Fname="HunYin" PropertyName="HunYin" Desc="婚姻状况">     <x>4</x>     <y>5</y>   </Field>   <Field Fname="Tel" PropertyName="Tel" Desc="联系电话">     <x>10</x>     <y>5</y>   </Field>   <Field Fname="WorkHistory" PropertyName="WorkHistory" Desc="工作经历">     <x>13</x>     <y>1</y>   </Field>

  <!--Field Fname="SaleGuid"  PropertyName="SaleList.SaleGuid" Desc="销售记录编号">     <x></x>     <y></y>   </Field-->   <Field Fname="ProductGuid"  PropertyName="SaleList.ProductGuid" Desc="货物编号">     <x>1</x>     <y>8</y>   </Field>   <Field Fname="ProductName"  PropertyName="SaleList.ProductName" Desc="产品编号">     <x>3</x>     <y>8</y>   </Field>   <Field Fname="ProductJiage"  PropertyName="SaleList.ProductJiage" Desc="售价">     <x>5</x>     <y>8</y>   </Field>   <Field Fname="SaleDate"  PropertyName="SaleList.SaleDate" Desc="出售日期">     <x>7</x>     <y>8</y>   </Field> </XML>

然后从数据库中获取数据存入到实体类中，用反射遍历实体类的所有属性，如果xml中得PropertyName节点的值和当前属性的属性名相等，那么就可以通过xml提供的坐标给Excel表格赋值了。这样做的一个好处是，可以实现不同表格的通用赋值，即使翻页显示也能应对（比如上面的销售记录每页只能显示4条，而程序中是构造的10条销售记录，只能通过分页显示完），不用为每种格式都去写一种实现，即使表格的样式有所变动也不用改程序，只需更改一下xml就好了。

语言组织和表达的能力不行，还是直接上码：

using System; using System.Collections.Generic; using System.Web; using System.Reflection; using System.Xml; /// <summary> ///Excel导出 /// </summary> public class ExcelExport {

#region 变量     public List<FiledInfo> FInfoList = new List<FiledInfo>();//xml属性、坐标列表     //public System.Text.StringBuilder strB = new System.Text.StringBuilder();     ExcelOperator excel = null;//Excel操作     int sheetIndex = 0;//excel工作薄索引     #endregion     public ExcelExport()     {         getNodeFromXml();     }     /// <summary>     /// 模拟从数据库获取数据     /// </summary>     /// <returns></returns>     public employee GetInfo()     {         employee e = new employee();         e.NAME = "路人甲";         e.SEX = true;         e.HunYin = false;         e.Tel = "15986752131";         e.Zz = "团员";         e.WorkHistory = "暂无";         for (int i = 0; i < 10; i++)         {             SaleInfo s = new SaleInfo();             s.ProductGuid = "产品编号" + i;             s.ProductName = "产品名称" + i;             s.ProductJiage = 10.23M * i;             s.SaleDate = DateTime.Now.AddDays(i);             e.SaleList.Add(s);         }         return e;     }

//public string GetProperties()     //{     //    employee emp = GetInfo();     //    GetProperty(emp, "");     //    return strB.ToString();     //}     //private void GetProperty(object obj, string parentProName)     //{     //    if (obj == null) return;     //    Type t = obj.GetType();     //    string strParentProName = (string.IsNullOrEmpty(parentProName) ? "" : parentProName.TrimEnd('.') + ".");     //    if (t.IsGenericType)     //    {     //        System.Collections.ICollection ic = obj as System.Collections.ICollection;     //        foreach (object objTemp in ic)     //        {     //            strB.Append("---------------------<br/>");     //            GetProperty(objTemp, strParentProName);     //        }     //    }     //    else     //    {     //        foreach (PropertyInfo pTemp in t.GetProperties())     //        {     //            string name = pTemp.Name;     //            string typeName = pTemp.PropertyType.FullName;     //            object value = pTemp.GetValue(obj, null);     //            if (pTemp.PropertyType.IsValueType || pTemp.PropertyType.Name.StartsWith("String"))     //            {     //                strB.AppendFormat("属性名：{0}，类型名称：{1}，属性值：{2}<br/>", strParentProName + name, typeName, value);     //            }     //            else     //            {     //                GetProperty(value, name);     //                strB.AppendFormat("属性名：{0}，类型名称：{1}，属性值：{2}<br/>", name, typeName, value);

//            }     //        }     //    }     //}     /// <summary>     /// 属性赋值     /// </summary>     private void SetPropertyValues(object obj, string parentProName, int index)     {         if (obj == null) return;         Type t = obj.GetType();         string strParentProName = (string.IsNullOrEmpty(parentProName) ? "" : parentProName.TrimEnd('.') + ".");         if (t.IsGenericType)         {             System.Collections.IList ic = obj as System.Collections.IList;             int ICIndex = 0;             foreach (object objTemp in ic)             {                 //strB.Append("---------------------<br/>");                 SetPropertyValues(objTemp, strParentProName, ICIndex);                 ICIndex++;             }         }         else         {             foreach (PropertyInfo pTemp in t.GetProperties())             {                 string name = pTemp.Name;                 string typeName = pTemp.PropertyType.FullName;                 object value = pTemp.GetValue(obj, null);                 if (pTemp.PropertyType.IsValueType || pTemp.PropertyType.Name.StartsWith("String"))                 {                     FiledInfo finfoResult = FInfoList.Find(delegate(FiledInfo finfo) { return finfo.PropertyName == strParentProName + name; });                     if (finfoResult != null)                     {                         //strB.AppendFormat("属性名：{0}，属性值：{1},坐标：x={2},y={3}<br/>", strParentProName + name, value,finfoResult.X,finfoResult.Y);                         int x = Convert.ToInt32(finfoResult.X) + index;                         int y = Convert.ToInt32(finfoResult.Y);                         excel.SetCellValue(sheetIndex, x, y, value.ToString());                     }                 }                 else                 {                     SetPropertyValues(value, name, 0);                 }             }         }     }     /// <summary>     ///     /// </summary>     public employee SetPropertyValue()     {         if (excel == null)         {             excel = new ExcelOperator(@"D:\程序开发\我写的东东\webLX\Excel\model\yuangong.xls");         }         employee emp = GetInfo();         List<employee> list = FormatEmplyeeObj(emp);         for (int i = 0; i < list.Count;i++ )         {             if (i != 0)             {                 excel.CreateNewSheetByCopy("销售记录" + i.ToString());             }         }         foreach (employee empTemp in list)         {             sheetIndex++;             SetPropertyValues(empTemp, "", 0);         }         excel.Close(true);         return emp;     }     /// <summary>     /// 设置值     /// </summary>     private void SetValue()     {         employee e = new employee();         Type t = e.GetType();

}

private void getNodeFromXml()     {         FInfoList.Clear();         string strXmlPath = @"D:\程序开发\我写的东东\webLX\Excel\modelXML\table1.xml";         XmlDocument xml = new XmlDocument();         xml.Load(strXmlPath);         XmlNodeList nodelist = xml.GetElementsByTagName("Field");         foreach (XmlNode node in nodelist)         {             FiledInfo finfo = new FiledInfo();             finfo.PropertyName = node.Attributes["PropertyName"].Value;             finfo.X = node.ChildNodes[1].InnerText;             finfo.Y = node.ChildNodes[0].InnerText;             FInfoList.Add(finfo);         }     }     /// <summary>     /// 格式化员工对象，便于翻页显示     /// </summary>     public List<employee> FormatEmplyeeObj(employee emp)     {         List<employee> list = new List<employee>();         if (emp != null)         {             if (emp.SaleList.Count > 4)//销售记录每页显示4行             {                 for (int i = 0; i < Math.Ceiling(Convert.ToDouble(emp.SaleList.Count) / 4); i++)                 {                     employee infoTemp = new employee();                     CloneEntityObject(emp, infoTemp);                     if ((i + 1) * 4 > emp.SaleList.Count)                     {                         infoTemp.SaleList = infoTemp.SaleList.GetRange(i * 4, emp.SaleList.Count-i*4);//销售记录每页显示四行                     }                     else                     {                         infoTemp.SaleList = infoTemp.SaleList.GetRange(i * 4, 4);//销售记录每页显示四行                     }                     list.Add(infoTemp);                 }             }         }         return list;     }     /// <summary>     /// 实体对象拷贝     /// </summary>     /// <param name="srcObj"></param>     /// <param name="desObj"></param>     public void CloneEntityObject(object srcObj, object desObj)     {         if (srcObj.Equals(desObj))         {             return;         }         if (srcObj.GetType() != desObj.GetType())         {             return;         }         System.Reflection.PropertyInfo[] info = srcObj.GetType().GetProperties();         foreach (System.Reflection.PropertyInfo property in info)         {             desObj.GetType().GetProperty(property.Name).SetValue(desObj,             srcObj.GetType().GetProperty(property.Name).GetValue(srcObj, null), null);         }     }

}

另外Excel的操作类在之前的文章中有，这里就不再贴了。