/// <summary>
/// Lucene并没有提供更新，这里的更新操作其实是如下两个操作的合集 先删除之后再添加
/// </summary>
/// <param name="mySearchUnit"></param>
/// <returns></returns>
#endregion
public bool Update(MySearchUnit mySearchUnit, out bool IsDeleted)
{
bool IsSuccess = false;
IndexWriter writer = null;
IndexSearcher searcher = new IndexSearcher(directory_luce, true);
try
{
writer = new IndexWriter(directory_luce, analyzer, false, IndexWriter.MaxFieldLength.LIMITED);//false表示追加（true表示删除之前的重新写入）
}
catch
{
writer = new IndexWriter(directory_luce, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);//false表示追加（true表示删除之前的重新写入）
}
finally
{
IsDeleted = Delete(mySearchUnit.id, writer);
bool iscreate = CreateIndex(writer, mySearchUnit);
if (IsDeleted && iscreate)
{
IsSuccess = true;
}
writer.Optimize();
writer.Dispose();
}
return(IsSuccess);
}
public bool CreateIndex(IndexWriter writer, MySearchUnit data)
{
try
{
if (data == null)
{
return(false);
}
Document doc = new Document();
Type type = data.GetType();//assembly.GetType("Reflect_test.PurchaseOrderHeadManageModel", true, true); //命名空间名称 + 类名
//创建类的实例
//object obj = Activator.CreateInstance(type, true);
//获取公共属性
PropertyInfo[] Propertys = type.GetProperties();
for (int i = 0; i < Propertys.Length; i++)
{
//Propertys[i].SetValue(Propertys[i], i, null); //设置值
PropertyInfo pi = Propertys[i];
string name = pi.Name;
object objval = pi.GetValue(data, null);
string value = objval == null ? "" : objval.ToString(); //值
if (name == "id" || name == "flag") //id在写入索引时必是不分词，否则是模糊搜索和删除，会出现混乱
{
doc.Add(new Field(name, value, Field.Store.YES, Field.Index.NOT_ANALYZED)); //id不分词
}
else
{
doc.Add(new Field(name, value, Field.Store.YES, Field.Index.ANALYZED));
}
}
writer.AddDocument(doc);
}
catch (System.IO.FileNotFoundException fnfe)
{
throw fnfe;
}
return(true);
}