asp.net递归生成XML树的示例

asp.net递归生成XML树的示例
代码:
以下是引用片段：
//CDepartmentInfo 类别实体类
//sjid :与大类别关联ID
//space:只是一个标记
//strOpinion用来存放类名
string sjid = "0";
string space = "+";
string strOpinion = "";
string paths = @"E:\test";
string FILE_NAME = paths + "\\BMCategory.XML";
        flag = true;
        StreamWriter sr = File.CreateText( "BMCategory" );
        sr.Close();
        StreamWriter x = new StreamWriter( FILE_NAME, true, System.Text.Encoding.Default );
       
        x.Write( "<R>");
        Display( sjid, space, ref iCount,x );
        x.Write( "</R>" );
        x.Close();     
 
递归写入XML涵数...
代码: 以下是引用片段：
public void Display( string sjid, string space, ref int iCount,StreamWriter x )
        {
            
            List<CDepartmentInfo> DepartmentList = new List<CDepartmentInfo>();
            DepartmentList = OrganizationRule.GetList( sjid );//读取一个列表类,这里是LIST
            foreach ( CDepartmentInfo aa in DepartmentList )
            {
                strOpinion = aa.BM_CategoryName.Trim().ToString();
                 x.Write( "<DSTree"+aa.BM_Categorylxpm.Trim()+"  text=\"" + aa.BM_CategoryName.Trim() + "\"  treeId=\"" + aa.BM_Categorylxpm.Trim() + "\"  mspace=\"栏目管理\">"+ strOpinion );
                 x.Write( "\r\n"  );
                 Display( aa.BM_Categorylxpm.ToString().Trim(), Text + space, ref iCount,x );
                 x.Write( "</DSTree" + aa.BM_Categorylxpm.Trim() + ">" ); 
            }

方法是参考网上用ASP来生成的...