//經過修改,可以正常工作
using system;
using system.drawing;
using system.collections;
using system.componentmodel;
using system.windows.forms;
using system.data;
using system.text;
using system.text.regularexpressions;
using system.io;
namespace a
///
/// 清理所有正在使用的資源。
///
protected override void dispose( bool disposing )
}base.dispose( disposing );
}#region windows 窗體設計器生成的**
///
/// 設計器支援所需的方法 - 不要使用**編輯器修改
/// 此方法的內容。
///
private void initializecomponent()
)}),
new system.windows.forms.treenode("節點4", new system.windows.forms.treenode )}),
new system.windows.forms.treenode("節點5", new system.windows.forms.treenode )})})});
this.treeview1.selectedimageindex = -1;
this.treeview1.size = new system.drawing.size(352, 349);
this.treeview1.tabindex = 0;
this.treeview1.afterexpand += new system.windows.forms.treevieweventhandler(this.treeview1_afterexpand);
this.treeview1.aftercollapse += new system.windows.forms.treevieweventhandler(this.treeview1_aftercollapse);
this.treeview1.dragover += new system.windows.forms.drageventhandler(this.treeview1_dragover);
this.treeview1.dragenter += new system.windows.forms.drageventhandler(this.treeview1_dragenter);
this.treeview1.itemdrag += new system.windows.forms.itemdrageventhandler(this.treeview1_itemdrag);
this.treeview1.dragdrop += new system.windows.forms.drageventhandler(this.treeview1_dragdrop);
// // form1
// this.allowdrop = true;
this.autoscalebasesize = new system.drawing.size(6, 14);
this.clientsize = new system.drawing.size(352, 349);
this.controls.add(this.treeview1);
this.name = "form1";
this.text = "form1";
this.resumelayout(false);
}#endregion
///
/// 應用程式的主入口點。
///
//如果允許移動，則可以肯定這是可以接受的資料
if(e.effect == dragdropeffects.move)
else if( !isin( overnode, movingnode ) )
}//把被移動的節點作為這個節點的子節點
movingnode.remove();
overnode.nodes.add(movingnode);
//展開這個節點
overnode.expand();
//更改為展開後的圖示
overnode.imageindex = 1;}}
}protected void treeview1_dragenter (object sender, drageventargs e)
else
}else
}protected void treeview1_dragover (object sender, drageventargs e)
//把這一次的節點設為老節點
oldnode = overnode;
//儲存當前滑鼠位置處節點的顏色
oldnodebackcolor = overnode.backcolor;
oldnodeforecolor = overnode.forecolor;
//獲取當前移動的節點
treenode movingnode = (treenode)(e.data.getdata(typeof(treenode)));
//根據當前滑鼠位置處的節點是否為正被拖動的節點分別設定顏色
if(overnode.equals(movingnode))
else}}
}protected void treeview1_itemdrag (object sender, itemdrageventargs e)
//aftercollapse事件方法
protected void treeview1_aftercollapse (object sender, treevieweventargs e)
//afterexpand事件方法
protected void treeview1_afterexpand (object sender, treevieweventargs e)
private treenode findtreenode (int x, int y)
//獲取下乙個可見的節點
node = node.nextvisiblenode;
}return null;
}private bool isin( treenode nodea,treenode nodeb )}}
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