开发VS2005下ComboBoxTreeView(下拉列表框弹出树) 与ToolStripComboBoxTreeView(下拉列表框工具条弹出树) (转)

最进在使用VS2005开发时,发现有很多新东西,比如,我们常用的ToolBar ,MainMenu,StatusBar,变成了功能强大,样式新颖的,ToolStrip,MenuStrip,StatusStrip,等.不过还是有些不足,比如,ComboBox 变化不大,下拉框里面只能是文本的,很不方便,我的想法是在下拉ComboBox时会出现TreeView 控件,这也是我今天要做的控件ComboBoxTreeView
开始写了一个,关键点是弹出TreeView 控件,但是把TreeView 做成一个窗体,弹出,还是有什么办法,一查VS2005有一个类窗体弹出类(很强大的对象)ToolStripDropDown, 在使用此类的时候需要传递一个ToolStripControlHost类型的对象,还有个问题就是,TreeView 弹出了,会在它的上方出现了一条小白条,这个问题很棘手,不过如果你懂Win32那就一切OK了,好,我们看看这个类吧.
一:ComboBoxTreeView

 

using System.Data;
using System.Text;
using System.Windows.Forms;
namespace WindowsApplication14
{
    
public class ComboBoxTreeView : ComboBox
    
{
        
private const int WM_LBUTTONDOWN = 0x201, WM_LBUTTONDBLCLK = 0x203;
        ToolStripControlHost treeViewHost;
        ToolStripDropDown dropDown;
        
public ComboBoxTreeView()
        
{
            TreeView treeView 
= new TreeView();
            treeView.AfterSelect
+=new TreeViewEventHandler(treeView_AfterSelect);
            treeView.BorderStyle 
= BorderStyle.None;
           
            treeViewHost 
= new ToolStripControlHost(treeView);
            dropDown 
= new ToolStripDropDown();
            dropDown.Width 
= this.Width;
            dropDown.Items.Add(treeViewHost);
        }

        
public void treeView_AfterSelect(object sender, TreeViewEventArgs e)
        
{
            
this.Text=TreeView.SelectedNode.Text;
            dropDown.Close();
        }

        
public TreeView TreeView
        
{
            
get return treeViewHost.Control as TreeView; }
        }

        
private void ShowDropDown()
        
{
            
if (dropDown != null)
            
{
               treeViewHost.Size 
=new Size(DropDownWidth-2,DropDownHeight);       
               dropDown.Show(
this0this.Height);
            }

        }

        
protected override void WndProc(ref Message m)
        
{
            
if (m.Msg == WM_LBUTTONDBLCLK || m.Msg == WM_LBUTTONDOWN)
            
{
                ShowDropDown();
                
return;
            }
        
            
base.WndProc(ref m);
        }

        
protected override void Dispose(bool disposing)
        
{
            
if (disposing)
            
{
                
if (dropDown != null)
                
{
                    dropDown.Dispose();
                    dropDown 
= null;
                }

            }

            
base.Dispose(disposing);
        }

    }


}


附图:

二:
ToolStrip
工具条中可以插入文本,下拉框,等,如果要插入下拉树的列表框但不可以直接插入ComboBoxTreeView,必须继承上面提到的ToolStripControlHost类,

using System;
using System.Windows;
using System.Windows.Forms;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Design;
using System.Windows.Forms.Design;

namespace WindowsApplication14
{
    [DefaultProperty(
"Items")]
    [ToolStripItemDesignerAvailability(ToolStripItemDesignerAvailability.ContextMenuStrip 
| (ToolStripItemDesignerAvailability.MenuStrip | ToolStripItemDesignerAvailability.ToolStrip))]
    
public class ToolStripComboBoxTreeView : ToolStripControlHost
    
{
        ToolStripComboBoxTreeViewControl
ToolStripComboBoxTreeViewControl#region ToolStripComboBoxTreeViewControl
        
internal class ToolStripComboBoxTreeViewControl  : ComboBox
        
{
            
private const int WM_LBUTTONDOWN = 0x201, WM_LBUTTONDBLCLK = 0x203;
            ToolStripControlHost treeViewHost;
            ToolStripDropDown dropDown;
            
private ToolStripComboBoxTreeView owner;

            
public ToolStripComboBoxTreeView Owner
            
{
                
get
                
{
                    
return owner;
                }

                
set
                
{
                    owner 
= value;
                }

            }

            
public ToolStripComboBoxTreeViewControl()
            
{
                TreeView treeView 
= new TreeView();
                treeView.AfterSelect 
+= new TreeViewEventHandler(treeView_AfterSelect);
                treeView.BorderStyle 
= BorderStyle.None;

                treeViewHost 
= new ToolStripControlHost(treeView);
                dropDown 
= new ToolStripDropDown();
                dropDown.Width 
= this.Width;
                dropDown.Items.Add(treeViewHost);
            }

            
public void treeView_AfterSelect(object sender, TreeViewEventArgs e)
            
{
                
this.Text = TreeView.SelectedNode.Text;
                
if (Owner.DropDown != null)
                
{
                    Owner.DropDown(
this, e);
                }

                dropDown.Close();
            }

            
public TreeView TreeView
            
{
                
get 
                

                    
return treeViewHost.Control as TreeView;
                }

            }

            
private void ShowDropDown()
            
{
                
if (dropDown != null)
                
{
                    treeViewHost.Size 
= new Size(DropDownWidth - 2, DropDownHeight);
                    dropDown.Show(
this0this.Height);
                }

            }

            
protected override void WndProc(ref Message m)
            
{
                
if (m.Msg == WM_LBUTTONDBLCLK || m.Msg == WM_LBUTTONDOWN)
                
{
                    ShowDropDown();
                    
return;
                }

                
base.WndProc(ref m);
            }

            
protected override void Dispose(bool disposing)
            
{
                
if (disposing)
                
{
                    
if (dropDown != null)
                    
{
                        dropDown.Dispose();
                        dropDown 
= null;
                    }

                }

                
base.Dispose(disposing);
            }

        }

        
#endregion

        
public ToolStripComboBoxTreeView()
            : 
base(ToolStripComboBoxTreeView.CreateControlInstance())
        
{
            ToolStripComboBoxTreeView.ToolStripComboBoxTreeViewControl control 
= 
                
base.Control as ToolStripComboBoxTreeView.ToolStripComboBoxTreeViewControl;
                control.Owner 
= this;
                

        }

        
private static Control CreateControlInstance()
        
{
            ComboBox comboBox 
= new ToolStripComboBoxTreeViewControl();
            
return comboBox;
        }

        属性
属性#region 属性
        [Browsable(
false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        
public ComboBox ComboBox
        
{
            
get
            
{
                
return (base.Control as ComboBox);
            }

        }

        [Browsable(
true)]
        
public TreeView TreeView
        
{
            
get
            
{
                    ToolStripComboBoxTreeView.ToolStripComboBoxTreeViewControl control 
= 
                
base.Control as ToolStripComboBoxTreeView.ToolStripComboBoxTreeViewControl;
                    
return control.TreeView;
            }

        }

        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        [Editor(
"System.Windows.Forms.Design.ListControlStringCollectionEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"typeof(UITypeEditor))]
        [Browsable(
true)]
        [EditorBrowsable(EditorBrowsableState.Always)] 
        [Localizable(
true)]
        
public AutoCompleteStringCollection AutoCompleteCustomSource
        
{
            
get
            
{
                
return this.ComboBox.AutoCompleteCustomSource;
            }

            
set
            
{
                
this.ComboBox.AutoCompleteCustomSource = value;
            }

        }

        [Browsable(
false)]
        [ DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        
public int SelectionLength
        
{
            
get
            
{
                
return this.ComboBox.SelectionLength;
            }

            
set
            
{
                
this.ComboBox.SelectionLength = value;
            }

        }

        [Browsable(
false)]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
        
public int SelectionStart
        
{
            
get
            
{
                
return this.ComboBox.SelectionStart;
            }

            
set
            
{
                
this.ComboBox.SelectionStart = value;
            }

        }

        [DefaultValue(
0)]
        [Localizable(
true)]
        [Description(
"下拉框最大长度")]
        
public int MaxLength
        
{
            
get
            
{
                
return this.ComboBox.MaxLength;
            }

            
set
            
{
                
this.ComboBox.MaxLength = value;
            }

        }
    
        [DefaultValue(
1)]
        [RefreshProperties(RefreshProperties.Repaint)]
        
public ComboBoxStyle DropDownStyle
        
{
            
get
            
{
                
return this.ComboBox.DropDownStyle;
            }

            
set
            
{
                
this.ComboBox.DropDownStyle = value;
            }

        }

        [EditorBrowsable(EditorBrowsableState.Always)]
        [Browsable(
true)]
        [DefaultValue(
106)]
        
public int DropDownHeight
        
{
            
get
            
{
                
return this.ComboBox.DropDownHeight;
            }

            
set
            
{
                
this.ComboBox.DropDownHeight = value;
            }

        }

        
public int DropDownWidth
        
{
            
get
            
{
                
return this.ComboBox.DropDownWidth;
            }

            
set
            
{
                
this.ComboBox.DropDownWidth = value;
            }

        }

        
#endregion

        方法
方法#region 方法
        
public void SelectAll()
        
{
            ComboBox.SelectAll();
        }

        
public void Select(int start, int length)
        
{
            ComboBox.Select(start, length);
        }

        
#endregion

        事件
事件#region 事件
      
        
public event EventHandler DropDown;
 
        
#endregion

       
    }

}


附图:

客户端调用方法:
public static void Main(){
   toolStripComboBoxTreeView1.TreeView.ImageList = this.imageList1;
            TreeNode root = new TreeNode("根节点",1,2);
            root.Nodes.Add("节点1");
            root.Nodes.Add("节点2");
            root.Nodes.Add("节点3");
            root.Nodes.Add("节点4");
            root.Nodes.Add("节点5");
            root.Nodes.Add("节点6");
            toolStripComboBoxTreeView1.TreeView.Nodes.Add(root);

posted on 2009-05-14 12:37  J-Pei  阅读(309)  评论(0编辑  收藏  举报

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