namespace BQ_TreeView
{
///
1<summary>
2
3/// BQ_TreeView 的摘要说明
4
5/// </summary>
public class BQ_TreeView : System.Windows.Forms.TreeView
{
private System.ComponentModel.Container components = null ;
private DataTable m_tb= null ;
private string m_RootMatID;
BQ_TreeNode RootNode= null ;
ArrayList alNode= new ArrayList ();
public BQ_TreeView()
{
InitializeComponent();
}
protected override void Dispose( bool disposing )
{
if ( disposing )
{
if (components != null )
{
components.Dispose();
}
}
base .Dispose( disposing );
}
#region
private void InitializeComponent()
{
components = new System.ComponentModel.Container();
}
#endregion
///
1<summary>
2
3/// 定义数据源
4
5/// </summary>
public DataTable TreeDataSource
{
set
{
m_tb= value ;
}
}
///
1<summary>
2
3/// 清空所有树控件中的信息
4
5/// </summary>
private void clear()
{
if (RootNode!= null )
{
RootNode.Nodes .Clear ();
if (RootNode!= null )
{
try
{
RootNode.Remove ();
}
catch
{}
}
}
if (alNode!= null )
if (alNode.Count >0)
alNode.Clear ();
}
///
1<summary>
2
3/// 构造树控件
4
5/// </summary>
public void MakeTree()
{
clear();// 清除树节点中的资源
Cursor.Current =Cursors.WaitCursor ;
// 首先要给根节点付值，因为取出来的结构中没有根节点的信息
RootNode= new BQ_TreeNode(m_RootMatID);
RootNode.MatID =m_RootMatID;
alNode.Add(RootNode);
this .Nodes .Add (RootNode);
foreach (DataRow row in m_tb.Rows )
{
BQ_TreeNode FNode= null ;
BQ_TreeNode CNode= null ;
CNode=MakeArray(row["ID"].ToString (),row[" 物料编码 "].ToString (), out FNode);
FNode.Nodes.Add (CNode);
}
RootNode.Expand ();
Cursor.Current =Cursors.Default ;
}
//
1<summary>
2
3/// 构造一个动态数组，模拟树控件一个分叉的线性结构，每一次都是最新的线性结构，这整个控件关键地方
4
5/// </summary>
///
1<param name="strID"/>
层次
///
1<param name="MatID"/>
物料编码
///
1<param name="nodeF"/>
父节点
///
1<returns> 构造的节点 </returns>
。
private BQ_TreeNode MakeArray( string strID, string MatID, out BQ_TreeNode nodeF) {
try
{
BQ_TreeNode node= new BQ_TreeNode (MatID);
node.MatID =MatID;
BQ_TreeNode nodeRet= null ;
int nGrade= int .Parse (strID);
if (nGrade==0)
{
}
else
{
if (alNode.Count>=nGrade+1)
{
alNode[nGrade]=node;
nodeRet=(BQ_TreeNode)alNode[nGrade-1];
}
else
{
alNode.Add (node);
nodeRet=(BQ_TreeNode)alNode[nGrade-1];
}
}
nodeF=nodeRet;
return node;
}
catch (Exception e)
{
throw new Exception("",e);
}
}
public string RootMatID
{
get
{
return m_RootMatID;
}
set
{
m_RootMatID= value ;
}
}
}
}
经过编译