用TreeView显示数据通用方法
2024-07-21 02:16:09
供稿：网友
public void treeviewdata(dataset ds,string textcolumnname,string parentcolumnname,string tagcolumnname)
{
mytreedata root = new mytreedata();
mytreedata child = null;
for (i = 0 ; i < ds.tables[0].rows.count; ++i)
{
child = new mytreedata(ds.tables[0].rows[i][textcolumnname].tostring(),ds.tables[0].rows[i][tagcolumnname],ds.tables[0].rows[i][parentcolumnname]);
root.add(child);
}
root.showtree(tv);
}
/// <summary>
/// 树型节点数据类
/// </summary>
public class mytreedata
{
public mytreedata()
{
}
public mytreedata(string name)
{
name = name;
}
public mytreedata(string name,object tag,object parent)
{
name = name;
tag = tag;
parent = parent;
}
/// <summary>
/// 子数据集合
/// </summary>
private mytreedatacollection child = new mytreedatacollection();
/// <summary>
/// 数据对象
/// </summary>
public object tag = null;
/// <summary>
/// 名称
/// </summary>
public string name = "";
/// <summary>
/// 父亲
/// </summary>
public object parent = null;
/// <summary>
/// 添加子数据
/// </summary>
/// <param name="child">子数据</param>
public void add(mytreedata child)
{
int i;
for (i = this.child.count - 1; i >= 0;--i)
{
if (convert.toint32(this.child[i].parent) == convert.toint32(child.tag) )
{
child.child.add(this.child[i]);
this.child.removeat(i);
}
}
mytreedata parent = findparent(this,child);
if (parent == null)
{
this.child.add(child);
}
else
{
parent.child.add(child);
}
}
/// <summary>
/// 查找父亲数据
/// </summary>
/// <param name="child">子数据</param>
/// <returns>父亲数据或者null</returns>
public mytreedata findparent(mytreedata parent,mytreedata child)
{
int i;
for (i = 0; i < parent.child.count; ++i)
{
if (convert.toint32(parent.child[i].tag) == convert.toint32(child.parent))
{
return parent.child[i];
}
mytreedata temp = findparent(parent.child[i],child);
if (temp != null)
{
return temp;
}
}
return null;
}
/// <summary>
/// 将子数据显示到treeview
/// </summary>
/// <param name="tv">treeview</param>
public void showtree(treeview tv)
{
int i;
treenode tn = null;
for (i = 0 ; i < this.child.count; ++i)
{
tn = tv.nodes.add(this.child[i].name);
tn.tag = this.child[i].tag;
showtree(tn,this.child[i]);
}
}
/// <summary>
/// 递归显示数据
/// </summary>
/// <param name="tn">节点</param>
/// <param name="child">数据</param>
private void showtree(treenode tnparent,mytreedata child)
{
int i;
treenode tn = null;
for (i = 0 ; i < child.child.count; ++i)
{
tn = tnparent.nodes.add(child.child[i].name);
tn.tag = child.child[i].tag;
showtree(tn,child.child[i]);
}
}
/// <summary>
/// 树型节点集合类
/// </summary>
internal class mytreedatacollection : addcollectionbase
{
public mytreedatacollection()
{
}
public mytreedata this[int index]
{
get
{
return (mytreedata)list[index];
}
}
}
}
