功能调整
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using NaiBa.Util.Extension;
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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using Work.Extension;
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namespace Work.UserComponents
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{
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public partial class UcComboBoxMutiSelect : ComboBox
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{
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//private bool _IsMultiSelect;
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//public bool IsMultiSelect { get => _IsMultiSelect; set => _IsMultiSelect = value; }
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string defaultText = "全部";
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[Browsable(true), Description("默认文本"), Category("自定义分组")]
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public string DefaultText
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{
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get { return defaultText; }
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set
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{
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defaultText = value;
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this.Text = defaultText;
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this.Invalidate();
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}
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}
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public List<object> SelectItems
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{
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get
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{
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if (this.checkedListBox == null)
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return this.Items.Cast<object>().ToList();
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List<object> lstObj = new List<object>();
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for (int i = 0; i < checkedListBox.Items.Count; i++)
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{
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if (checkedListBox.GetItemChecked(i))
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{
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lstObj.Add(checkedListBox.Items[i]);
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}
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}
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return lstObj;
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}
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}
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Label lblX = null;
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CheckedListBox checkedListBox = null;
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public UcComboBoxMutiSelect()
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{
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SetStyle(ControlStyles.DoubleBuffer |
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ControlStyles.OptimizedDoubleBuffer |
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ControlStyles.AllPaintingInWmPaint, true);
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UpdateStyles();
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this.Text = DefaultText;
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this.DropDownWidth = 1;
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this.DropDownHeight = 1;
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this.DropDown += UcComboBoxMutiSelect_DropDown;
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this.DropDownClosed += UcComboBoxMutiSelect_DropDownClosed;
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Task.Run(() =>
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{
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for (int i = 0; i < 50; i++)
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{
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System.Threading.Thread.Sleep(100);
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var parentForm = FindForm();
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if (parentForm != null && parentForm.Visible == true)
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{
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Invoke(new Action(() =>
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{
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UpdateClearLabel();
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}));
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break;
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}
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}
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this.Move += UcComboBoxMutiSelect_Move;
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this.Resize += UcComboBoxMutiSelect_Resize;
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this.SizeChanged += UcComboBoxMutiSelect_SizeChanged;
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this.VisibleChanged += UcComboBoxMutiSelect_VisibleChanged;
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this.ParentChanged += UcComboBoxMutiSelect_ParentChanged;
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this.Disposed += UcComboBoxMutiSelect_Disposed;
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});
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}
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private void UcComboBoxMutiSelect_Disposed(object sender, EventArgs e)
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{
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if (lblX != null)
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lblX.Dispose();
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}
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private void UcComboBoxMutiSelect_ParentChanged(object sender, EventArgs e)
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{
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//lblX.Parent.Controls.Remove(lblX);
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//lblX.Dispose();
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//lblX = null;
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if (this != null && !this.IsDisposed && this.Parent != null)
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{
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this.GetParentNotTable().Controls.Add(lblX);
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UpdateClearLabel();
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}
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}
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private void UcComboBoxMutiSelect_VisibleChanged(object sender, EventArgs e)
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{
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if (lblX != null && lblX.Visible != this.Visible)
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lblX.Visible = this.Visible;
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}
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private void UcComboBoxMutiSelect_SizeChanged(object sender, EventArgs e)
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{
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UpdateClearLabel();
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}
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private void UcComboBoxMutiSelect_Resize(object sender, EventArgs e)
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{
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UpdateClearLabel();
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}
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private void UcComboBoxMutiSelect_Move(object sender, EventArgs e)
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{
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UpdateClearLabel();
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}
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private void UpdateClearLabel()
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{
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if (lblX == null || lblX.Disposing || lblX.IsDisposed)
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{
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lblX = new Label();
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lblX.Click += LblX_Click;
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//lblX.BorderStyle = BorderStyle.FixedSingle;
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lblX.Text = "×";
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lblX.ForeColor = Color.FromArgb(63, 126, 255);
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lblX.BackColor = this.BackColor;
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lblX.AutoSize = false;
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//lblX.AutoSize = true;
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//lblX.Width = 17;
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lblX.Width = 15;
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lblX.Height = 19;
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lblX.SendToBack();
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//Form form = this.FindForm();
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//form.Controls.Add(lblX);
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var p = this.GetParentNotTable();
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if (p != null)
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p.Controls.Add(lblX);
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}
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Point relativeLocation = this.GetRelativePosition(this.GetParentNotTable());
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lblX.Location = new Point(relativeLocation.X + this.Width - 19 - lblX.Width, relativeLocation.Y + (this.Height - lblX.Height) / 2);
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lblX.Visible = this.Visible;
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lblX.BringToFront();
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}
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private void LblX_Click(object sender, EventArgs e)
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{
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if (this.lblX.Text == "×")
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{
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this.lblX.Text = "↶";
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this.Text = "";
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}
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else
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{
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this.lblX.Text = "×";
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this.Text = DefaultText;
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}
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}
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private void UcComboBoxMutiSelect_DropDownClosed(object sender, EventArgs e)
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{
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if (checkedListBox != null)
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{
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var parentForm = this.FindForm();
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Point mousePosition = parentForm.PointToClient(Cursor.Position);
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Point relativeLocation = checkedListBox.GetRelativePosition();
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if (mousePosition.X < relativeLocation.X || mousePosition.X > relativeLocation.X + checkedListBox.Width ||
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mousePosition.Y < relativeLocation.Y || mousePosition.Y > relativeLocation.Y + checkedListBox.Height)
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{
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checkedListBox.Visible = false;
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}
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}
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}
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private void UcComboBoxMutiSelect_DropDown(object sender, EventArgs e)
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{
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var parentForm = this.FindForm();
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if (checkedListBox == null)
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{
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checkedListBox = new CheckedListBox();
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checkedListBox.Visible = false;
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checkedListBox.CheckOnClick = true;
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checkedListBox.ItemCheck += checkedListBox_ItemCheck;
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checkedListBox.MouseLeave += checkedListBox_MouseLeave;
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checkedListBox.MouseEnter += CheckedListBox_MouseEnter;
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checkedListBox.MouseMove += CheckedListBox_MouseMove;
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//checkedListBox.MouseUp += new MouseEventHandler(checkedListBox_MouseUp);
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parentForm.Controls.Add(checkedListBox);
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}
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string str1 = string.Join(",", this.Items.Cast<object>().Select(o => o.ParseToString()));
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string str2 = string.Join(",", this.checkedListBox.Items.Cast<object>().Select(o => o.ParseToString()));
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if (str1 != str2)
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{
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checkedListBox.Items.Clear();
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if (Items.Count > 0)
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checkedListBox.ItemCheck -= checkedListBox_ItemCheck;
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foreach (var item in this.Items)
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{
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if (Items[Items.Count - 1] == item)
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checkedListBox.ItemCheck += checkedListBox_ItemCheck;
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checkedListBox.Items.Add(item.ParseToString(), true);
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}
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}
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// 防止一起设置每次都要重新拼接字符串
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if (checkedListBox.Items.Count > 0)
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checkedListBox.ItemCheck -= checkedListBox_ItemCheck;
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for (int index = 0; index < checkedListBox.Items.Count; index++)
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{
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if (index == checkedListBox.Items.Count - 1)
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checkedListBox.ItemCheck += checkedListBox_ItemCheck;
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var item = checkedListBox.Items[index];
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if (this.Text == DefaultText || this.Text.Split(new string[] { ";", "；", ",", "，" }, StringSplitOptions.RemoveEmptyEntries).ToList().Contains(item.ParseToString()))
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checkedListBox.SetItemChecked(index, true);
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else
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checkedListBox.SetItemChecked(index, false);
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}
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// 计算宽度
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int maxItemWidth = 0;
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for (int index = 0; index < checkedListBox.Items.Count; index++)
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{
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var wth = TextRenderer.MeasureText(checkedListBox.Items[index].ToString(), checkedListBox.Font).Width + 40;
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if (wth > maxItemWidth)
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maxItemWidth = wth;
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}
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checkedListBox.SendToBack();
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checkedListBox.Visible = true;
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// 确定弹出列表框的大小和位置
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//checkedListBox.Size = new Size(Math.Max(80, this.Width), Math.Min(300, checkedListBox.PreferredHeight));
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checkedListBox.Size = new Size(Math.Max(this.Width, maxItemWidth), Math.Min(300, checkedListBox.PreferredHeight));
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Point relativeLocation = this.GetRelativePosition();
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if (parentForm.Height - relativeLocation.Y >= this.Height + checkedListBox.Size.Height + 20)
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relativeLocation = new Point(relativeLocation.X, relativeLocation.Y + this.Height);
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else
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relativeLocation = new Point(relativeLocation.X, relativeLocation.Y - checkedListBox.Size.Height);
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checkedListBox.Location = relativeLocation;
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checkedListBox.BringToFront();
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//parentForm.ActiveControl = checkedListBox;
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//checkedListBox.Focus();
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}
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private void CheckedListBox_MouseMove(object sender, MouseEventArgs e)
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{
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//this.DropDownClosed -= UcComboBoxMutiSelect_DropDownClosed;
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}
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private void CheckedListBox_MouseEnter(object sender, EventArgs e)
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{
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//this.DropDownClosed -= UcComboBoxMutiSelect_DropDownClosed;
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}
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private void checkedListBox_MouseLeave(object sender, EventArgs e)
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{
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////this.DropDownClosed += UcComboBoxMutiSelect_DropDownClosed;
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////统计选取的项目
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//string str = "";
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//for (int i = 0; i < checkedListBox.Items.Count; i++)
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//{
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// if (checkedListBox.GetItemChecked(i))
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// {
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// str += $"{checkedListBox.Items[i].ParseToString()};";
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// }
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//}
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//this.Text = str;
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checkedListBox.Visible = false;
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this.OnDropDownClosed(null);
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}
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private void checkedListBox_ItemCheck(object sender, EventArgs e)
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{
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//统计选取的项目
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Task.Run(() =>
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{
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Thread.Sleep(100);
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Invoke(new Action(() =>
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{
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string str = "";
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for (int i = 0; i < checkedListBox.Items.Count; i++)
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{
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if (checkedListBox.GetItemChecked(i))
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{
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str += $"{checkedListBox.Items[i].ParseToString()};";
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}
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}
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this.Text = str.Trim(';');
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string str1 = string.Join(";", this.Items.Cast<object>().Select(o => o.ParseToString()));
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if (this.Text.Trim(';') == str1)
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{
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this.Text = this.DefaultText;
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}
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}));
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});
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}
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}
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}
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