不用treeview控件生成漂亮的树型结构代码,CSharp代码库,德仔网

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【CSharp】不用treeview控件生成漂亮的树型结构

作者:CSDN / 发布于2012/1/11/ 988

项目要求采用自己的模板驱动和UI结构致使不能使用任何ASP.NET自带控件。今天要给无限分类生成树形结构，我参考了网上的一个算法据说是PHPCMS用的生成树类。


 

/// 
/// 通用的树型类，可以生成任何树型结构 
/// 
public class CateTreeView 
{ 
IList lsCate = new List(); //初始化数组 
string[] icons = new string[] { "│", "├", "└" }; //修饰符号 
string htmlret = ""; 
string nbsp = " "; 
public CateTreeView(IList ls) 
{ 
lsCate = ls; 
htmlret = ""; 
} 
public CategoryInfo getOne(int id) 
{ 
foreach (CategoryInfo m in lsCate) 
{ 
if (m.cateid == id) 
{ 
return m; 
} 
} 
return null; 
}
/// 
/// 得到父级数组 
/// 
/// 
/// 
public IList get_parent(int myid) 
{ 
IList lsnew = new List(); 
CategoryInfo m = getOne(myid); 
if (m == null) return lsnew; 
int pid = m.parentid; 
if (pid == 0) return lsnew; 
pid = getOne(pid).parentid; 
foreach (CategoryInfo mcate in lsCate) 
{ 
if (mcate.parentid == pid) 
{ 
lsnew.Add(mcate); 
} 
} 
return lsnew;
} 
/// 
/// 得到子级分类 
/// 
/// 
/// 
public IList get_child(int myid) 
{ 
IList lsnew = new List();
foreach (CategoryInfo mcate in lsCate) 
{ 
if (mcate.parentid == myid) 
{ 
lsnew.Add(mcate); 
} 
} 
return lsnew; 
}
/// 
/// 得到树型结构 
/// 
/// 
/// 
/// 
/// 
/// 
/// 
public string get_tree(int myid, string str, int sid, string adds, string str_group) 
{ 
int number = 1; 
IList child = get_child(myid); 
if (child.Count > 0) 
{ 
int total = child.Count; 
foreach (CategoryInfo m in child) 
{ 
string j = "", k = ""; 
if (number == total) 
{ 
j += icons[2]; 
} 
else 
{ 
j += icons[1]; 
k = adds != "" ? icons[0] : ""; 
} 
string spacer = adds != "" ? adds + j : ""; 
string selected = m.cateid == sid ? "selected" : ""; 
string tempstr = ""; 
if (m.parentid == 0 && str_group != "") //? "\$nstr = \"$str_group\";" : "\$nstr = \"$str\";"; 
{ 
tempstr = str_group; 
} 
else 
{ 
tempstr = str; 
} 
tempstr = tempstr.Replace("$id", m.cateid.ToString()); 
tempstr = tempstr.Replace("$parentid", m.parentid.ToString());
tempstr = tempstr.Replace("$select", selected); 
tempstr = tempstr.Replace("$spacer", spacer); 
tempstr = tempstr.Replace("$name", m.catename); 
tempstr = tempstr.Replace("$modelid", m.modelid.ToString());
htmlret += tempstr; 
string bspstr = nbsp; 
get_tree(m.cateid, str, sid, adds + k + bspstr, str_group); 
number++; 
//$this->ret .= $nstr; 
//$nbsp = $this->nbsp; 
//$this->get_tree($id, $str, $sid, $adds.$k.$nbsp,$str_group); 
//$number++; 
} 
} 
return htmlret; 
//return $this->ret; 
} 
/// 
/// 同上一类方法，jquery treeview 风格，可伸缩样式（需要treeview插件支持） 
/// 
/// 
/// 
/// 
/// 
/// 
/// 
/// 
/// 
/// HTML 
public string get_treeview(int myid, string effected_id, string str, string str2, int showlevel, string style, int currentlevel, bool recursion) 
{ 
IList child = get_child(myid);
string effected = "id=\"" + effected_id + "\"";
string placeholder = "
"; 
if (!recursion) htmlret += " 
+ style + "\">"; 
foreach (CategoryInfo m in child) 
{ 
IList child2 = get_child(m.cateid); 
string folder = ""; 
<a>//@extract($a</a>); 
if (showlevel > 0 && showlevel == currentlevel && (child2.Count > 0)) folder = "hasChildren"; //如设置显示层级模式@2011.07.01 
string floder_status = ((folder != "") ? " class=\"" + folder + "\"" : ""); 
htmlret += recursion ? " 
+ m.cateid + "\">" : " 
+ m.cateid + "\">"; 
recursion = false; 
if (child2.Count > 0) 
{ 
string nstr = str2; 
//eval("\$nstr = \"$str2\";"); 
string tempstr = str2; 
tempstr = tempstr.Replace("$id", m.cateid.ToString()); 
tempstr = tempstr.Replace("$parentid", m.parentid.ToString()); 
//tempstr = tempstr.Replace("$select", selected); 
//tempstr = tempstr.Replace("$spacer", spacer); 
tempstr = tempstr.Replace("$name", m.catename); 
tempstr = tempstr.Replace("$modelid", m.modelid.ToString()); 
htmlret += tempstr; 
if (showlevel == 0 || (showlevel > 0 && showlevel > currentlevel)) 
{ 
get_treeview(m.cateid, effected_id, str, str2, showlevel, style, currentlevel + 1, true); 
} 
else if (showlevel > 0 && showlevel == currentlevel) 
{ 
htmlret += placeholder; 
} 
} 
else 
{ 
string nstr = str; 
string tempstr = str; 
tempstr = tempstr.Replace("$id", m.cateid.ToString()); 
tempstr = tempstr.Replace("$parentid", m.parentid.ToString()); 
//tempstr = tempstr.Replace("$select", selected); 
//tempstr = tempstr.Replace("$spacer", spacer); 
tempstr = tempstr.Replace("$name", m.catename); 
tempstr = tempstr.Replace("$modelid", m.modelid.ToString()); 
htmlret += tempstr;
//str += nstr; 
} 
htmlret += recursion ? " 
" : " "; 
} 
if (!recursion)htmlret += ""; 
return htmlret; 
}
}

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