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。
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