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标签流式布局ComboBox多选winfrom控件.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace UserControlLibrary
{
public partial class UComboxMuti : UserControl
{
/// <summary>
/// 弹出部分
/// </summary>
HsToolStripDropDown toolStripDropDown;
public UComboxMuti()
{
InitializeComponent();
}
//用于模拟键盘输入
[DllImport("user32.dll")]
private static extern void keybd_event(
byte bVk, byte bScan, uint dwFlags, int dwExtraInfo);
//显示控件
//Control Control;
//下拉面板
Panel panel;
//删除中
bool Deling = false;
//绘制面板用变量
//光标前一位置
Point pPoint;
//光标当前位置
Point cPoint;
//鼠标是否已按下
bool _isMouseDown = false;
//关闭下拉时光标是否在ComboBox上
bool _isCursorOnPanl = false;
bool _isEditState = false;
#region 数据交互方法
/// <summary>
/// 显示选项列表
/// </summary>
/// <param name="dt">0列=ID，1列=文本</param>
public void SetOptionItem(DataTable dt)
{
FreezeControl(this, true);
int i = 0;
int c = dt.Rows.Count;
ToolStripItem[] toolItems = new ToolStripItem[c];
foreach (DataRow dr in dt.Rows)
{
ToolStripLabel tsl = new ToolStripLabel();
tsl.Name = dr[0].ToString();
tsl.Text = dr[1].ToString();
tsl.IsLink = true;
toolItems[i] = tsl;
i ;
}
OptionItem.Items.Clear();
OptionItem.Items.AddRange(toolItems);
FreezeControl(this, false);
}
/// <summary>
/// 显示选择值
/// </summary>
/// <param name="dt">0列=ID，1列=文本</param>
public void SetValueItem(DataTable dt)
{
FreezeControl(this, true);
foreach (DataRow dr in dt.Rows)
{
UComboxMutiTag ut = new UComboxMutiTag();
ut.TagIndex = dr[0].ToString();
ut.TagText = dr[1].ToString();
ut.DelClick = Tl_DelClick;
ut.BackColor = Color.LightGreen;
ut.UEnabled = false;
flowLayoutPanel2.Controls.Add(ut);
}
FreezeControl(this, false);
}
/// <summary>
/// 获取ItemID
/// </summary>
/// <returns></returns>
public List<string> GetItemsId()
{
List<string> strs = new List<string>();
foreach (Control item in flowLayoutPanel2.Controls)
{
if (item is UComboxMutiTag)
{
strs.Add(((UComboxMutiTag)item).TagIndex);
}
}
return strs;
}
#endregion
#region 数据交互属性
[Browsable(true), Category("UC属性"), Description("选定项目集合")]
[TypeConverter(typeof(System.ComponentModel.CollectionConverter))]//指定编辑器特性
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]//设定序列化特性
public List<ValueItem> ValItems
{
get //获取项目信息
{
List<ValueItem> strs = new List<ValueItem>();
foreach (Control item in flowLayoutPanel2.Controls)
{
if (item is UComboxMutiTag)
{
ValueItem Vi = new ValueItem();
Vi.IndexID = ((UComboxMutiTag)item).TagIndex;
Vi.Title = ((UComboxMutiTag)item).TagText;
strs.Add(Vi);
}
}
return strs;
}
set //设置显示项目
{
FreezeControl(this, true);
foreach (ValueItem item in value)
{
UComboxMutiTag ut = new UComboxMutiTag();
ut.TagIndex = item.IndexID;
ut.TagText = item.Title;
ut.BackColor = Color.LightGreen;
ut.DelClick = Tl_DelClick;
ut.UEnabled = false;
flowLayoutPanel2.Controls.Add(ut);
}
FreezeControl(this, false);
;
}
}
[Browsable(true), Category("UC属性"), Description("选项集合")]
//[TypeConverter(typeof(System.ComponentModel.CollectionConverter))]//指定编辑器特性
//[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]//设定序列化特性
public ToolStripItemCollection OptItems
{
get
{
return OptionItem.Items;
}
set
{
int i = 0;
int c = value.Count;
ToolStripItem[] toolItems = new ToolStripItem[c];
foreach (ToolStripItem item in value)
{
toolItems[i] = item;
i ;
}
OptionItem.Items.Clear();
OptionItem.Items.AddRange(toolItems);
}
}
#endregion
[Browsable(true), Category("UC属性"), Description("编辑状态")]
public bool UEnabled
{
get { return _isEditState; }
set
{
_isEditState = value;
//显示X号
foreach (Control item in this.flowLayoutPanel2.Controls)
{
if (item is UComboxMutiTag)
{
((UComboxMutiTag)item).UEnabled = value;
}
}
if (value)
{
OpenPanl();
}
}
}
[Browsable(false)]
public Control Control { get; set; }
[Browsable(false)]
public UComboxMuti(IContainer container)
{
container.Add(this);
InitializeComponent();
//绘制下拉面板
this.DrawPanel();
this.Control = this.panel1;// control;
this.Control.Location = new Point(0, 0);
this.Control.Dock = DockStyle.Fill;
this.Control.Parent = this.panel;
}
/// <summary>
/// 点击事件
/// </summary>
protected override void OnMouseClick(MouseEventArgs e)
{
this.Focus();
OpenPanl();
}
/// <summary>
/// //打开选择框区域
/// </summary>
private void OpenPanl()
{
if (!_isEditState) return;
if (_isCursorOnPanl)
{
_isCursorOnPanl = false;
//模拟Enter键，取消掉下拉状态
keybd_event(0xD, 0, 0, 0);
keybd_event(0xD, 0, 0x0002, 0);
}
else
{
//创建下拉窗
ToolStripControlHost toolStripControlHost = new ToolStripControlHost(this.panel);
toolStripDropDown = new HsToolStripDropDown();
//设置边框
toolStripControlHost.Margin = Padding.Empty;
toolStripControlHost.Padding = Padding.Empty;
toolStripControlHost.AutoSize = false;
toolStripDropDown.Padding = Padding.Empty;
//添加
toolStripDropDown.Items.Add(toolStripControlHost);
toolStripDropDown.Show(this, 0, this.Height);
//设置宽度最小值
if (this.panel.Width < this.Width)
{
this.panel.Size = new System.Drawing.Size(this.Width, this.panel.Height);
}
//判断关闭时光标在组件内
toolStripDropDown.Closed = delegate (object sender, ToolStripDropDownClosedEventArgs e1)
{
Rectangle rec = new Rectangle(0, 0, this.Width, this.Height);
this._isCursorOnPanl = rec.Contains(this.PointToClient(Cursor.Position));
};
//设置焦点
toolStripDropDown.Focus();
}
}
/// <summary>
/// 绘制下拉面板
/// </summary>
private void DrawPanel()
{
this.panel = new Panel();
this.panel.Size = new System.Drawing.Size(this.Width, 100);
this.panel.Padding = new Padding(1, 1, 1, 13);
this.panel.BackColor = Color.Gainsboro;
//绘制边线
this.panel.Paint = delegate (object sender, PaintEventArgs e)
{
ControlPaint.DrawBorder(e.Graphics,
this.panel.ClientRectangle,
Color.DarkGray,
1,
ButtonBorderStyle.Solid,
Color.DarkGray,
1,
ButtonBorderStyle.Solid,
Color.DarkGray,
1,
ButtonBorderStyle.Solid,
Color.DarkGray,
1,
ButtonBorderStyle.Solid);
};
//使用Label实现右下角拖动按钮
Label label = new Label();
label.Text = "◢";
label.Font = new Font("宋体", 9);
label.Parent = this.panel;
label.AutoSize = true;
label.Anchor = (AnchorStyles.Bottom | AnchorStyles.Right);
label.Location = new Point(this.panel.Location.X this.panel.Size.Width - label.Width 3,
this.panel.Location.Y this.panel.Size.Height - label.Height - 1);
//实现缩放功能
label.MouseDown = delegate (object sender, MouseEventArgs e1)
{
this.pPoint = Cursor.Position;
this._isMouseDown = true;
};
label.MouseLeave = delegate (object sender, EventArgs e1)
{
this._isMouseDown = false;
};
label.MouseMove = delegate (object sender, MouseEventArgs e1)
{
this.cPoint = Cursor.Position;
if (e1.Button == MouseButtons.Left && _isMouseDown)
{
this.panel.Height = Math.Max(this.panel.Height cPoint.Y - pPoint.Y, 23);
this.panel.Width = Math.Max(this.panel.Width cPoint.X - pPoint.X, this.Width);
pPoint = Cursor.Position;
}
else
{
label.Cursor = Cursors.SizeNWSE;
}
};
}
/// <summary>
/// 已选定
/// </summary>
/// <param name="cname"></param>
/// <returns></returns>
private bool IsSelected(string cname)
{
bool b = false;
foreach (Control item in this.flowLayoutPanel2.Controls)
{
if (item is UComboxMutiTag)
{
if (cname == ((UComboxMutiTag)item).TagIndex.ToString())
{
b= true;
return b;
}
}
}
return b;
}
//添加选项
private void toolStrip2_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
{
Deling = false; //标记不删除
if (IsSelected(e.ClickedItem.Name.ToString())) return;//已选过
if (!_isEditState) return;
UComboxMutiTag tl = new UComboxMutiTag();
tl.TagText = e.ClickedItem.Text;
tl.TagIndex = e.ClickedItem.Name;
tl.BackColor = Color.LightGreen;
tl.DelClick = Tl_DelClick;
tl.UEnabled = true;
this.flowLayoutPanel2.Controls.Add(tl);
}
//删除
private void Tl_DelClick(object sender, EventArgs e)
{
Deling = true; //标记删除
if (toolStripDropDown is null) return; //移动弹窗
toolStripDropDown.Hide();
}
//框大小编号
private void flowLayoutPanel2_SizeChanged(object sender, EventArgs e)
{
int fheight = flowLayoutPanel2.Size.Height;
this.Height = fheight 1;
button1.Height = this.Height;
if (!_isEditState) return;
if (toolStripDropDown is null) return; //移动弹窗
if (Deling) return; //删除中不显示选框
toolStripDropDown.Show(this, 0, this.Height);
}
private void UComboxMuti_SizeChanged(object sender, EventArgs e)
{
panel2.Width = this.Width - 30;
}
private void toolStrip2_Paint(object sender, PaintEventArgs e)
{
// 去掉ToolStrip底部横线
CutBottomLine(sender, e);
}
private void button1_Click(object sender, EventArgs e)
{
OpenPanl();
}
#region 去掉ToolStrip底部横线
/// <summary>
/// 去掉ToolStrip底部横线
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public static void CutBottomLine(object sender, PaintEventArgs e)
{
if (((ToolStrip)sender).RenderMode == ToolStripRenderMode.System)
{
Rectangle rect = new Rectangle(0, 0, ((ToolStrip)sender).Width, ((ToolStrip)sender).Height - 2);
e.Graphics.SetClip(rect);
}
}
#endregion
#region 停止更新控件
/// <summary>
/// The m LST freeze control
/// </summary>
static Dictionary<Control, bool> m_lstFreezeControl = new Dictionary<Control, bool>();
/// <summary>
/// 功能描述:停止更新控件
/// <param name="control">control</param>
/// <param name="blnToFreeze">是否停止更新</param>
public static void FreezeControl(Control control, bool blnToFreeze)
{
if (blnToFreeze && control.IsHandleCreated && control.Visible && !control.IsDisposed && (!m_lstFreezeControl.ContainsKey(control) || (m_lstFreezeControl.ContainsKey(control) && m_lstFreezeControl[control] == false)))
{
m_lstFreezeControl[control] = true;
control.Disposed = control_Disposed;
SendMessage(control.Handle, 11, 0, 0);
}
else if (!blnToFreeze && !control.IsDisposed && m_lstFreezeControl.ContainsKey(control) && m_lstFreezeControl[control] == true)
{
m_lstFreezeControl.Remove(control);
SendMessage(control.Handle, 11, 1, 0);
control.Invalidate(true);
}
}
/// <summary>
/// Sends the message.
/// </summary>
/// <param name="hWnd">The h WND.</param>
/// <param name="msg">The MSG.</param>
/// <param name="wParam">The w parameter.</param>
/// <param name="lParam">The l parameter.</param>
[DllImport("user32.dll")]
public static extern void SendMessage(IntPtr hWnd, int msg, int wParam, int lParam);
/// <summary>
/// Handles the Disposed event of the control control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs" /> instance containing the event data.</param>
static void control_Disposed(object sender, EventArgs e)
{
try
{
if (m_lstFreezeControl.ContainsKey((Control)sender))
m_lstFreezeControl.Remove((Control)sender);
}
catch { }
}
#endregion
}
//值
public class ValueItem
{
/// <summary>
/// 书记标题
/// </summary>
/// <value>The title.</value>
public string Title { get; set; }
/// <summary>
/// 数据索引ID
/// </summary>
/// <value>The details.</value>
public string IndexID { get; set; }
}
/// <summary>
/// 重写ToolStripDropDown
/// 使用双缓存减少闪烁
/// </summary>
public class HsToolStripDropDown : ToolStripDropDown
{
protected override CreateParams CreateParams
{
get
{
CreateParams cp = base.CreateParams;
cp.ExStyle |= 0x02000000;//双缓存
return cp;
}
}
}
}