DreamSkin自定义美化控件-带智能下拉提示的TextBox控件

IntellisenseTextBox 控件
该控件实现功能：
1.文本框下拉智能匹配的数据。

2.使用键盘上下键控制或鼠标选择选项。

3.在文字变化的时候同时实现同步识别。
属性;
EditValue string 类型文本内容

WaterText string 类型水印文本内容

TextList List<string> 类型下拉内容
目前采用了DEV控件，后期处理需做去DEV控件化。
源码：
private string editValue;

   /// <summary>
   /// 文本内容
   /// </summary>
   public string EditValue
   {
       get { return textValue.Text; }
       set
       {
           editValue = value;
           textValue.Text = value;
       }
   }

   private string waterText;

   /// <summary>
   /// 水印文本内容
   /// </summary>
   public string WaterText
   {
       get { return waterText; }
       set
       {
           waterText = value;
           if (!String.IsNullOrEmpty(waterText))
           {
               textValue.Properties.NullText = waterText;
               textValue.Properties.NullValuePrompt = waterText;
               textValue.Properties.NullValuePromptShowForEmptyValue = true;
           }
       }
   }
   /// <summary>
   ///  选中的项编号
   /// </summary>
   private int SelectIndex = 0;

   /// <summary>
   /// 选中的项内容
   /// </summary>
   private string SelectValue = "";

   private List<string> textList;

   /// <summary>
   /// 下拉内容
   /// </summary>
   public List<string> TextList
   {
       get { return textList; }
       set { textList = value; }
   }

   /// <summary>
   /// 下拉显示
   /// </summary>
   private List<string> ShowTextList;

   private bool IsDown = false;

   Graphics g;

   public IntellisenseTextBox()
   {
       InitializeComponent();
   }

   private void IntellisenseTextBox_Load(object sender, EventArgs e)
   {
       ShowTextList = new List<string>();
   }

   /// <summary>
   /// 绘制下拉内容
   /// </summary>
   private void AddList()
   {
       int count = ShowTextList.Count();
       if (count < 1)
           return;

       int invalCount = count;
       for (int i = 0; i < invalCount; i++)
       {
           PanelControl panel = new PanelControl();
           panel.Name = "panel" + i;
           panel.Tag = i;
           panel.BorderStyle = DevExpress.XtraEditors.Controls.BorderStyles.NoBorder;
           panel.Width = this.textValue.Width + 10;
           panel.Height = 30;
           panel.Location = new Point(1, 30 + i * 30+1);
           panel.MouseHover += panel_MouseHover;
           panel.MouseMove += panel_MouseHover;
           panel.MouseLeave += panel_MouseLeave;
           panel.Click += panel_Click;

           LabelControl label = new LabelControl();
           label.Name = "label" + i;
           label.Text = ShowTextList[i];
           label.Location = new Point(13, 5);
           label.Font = this.textValue.Font;
           label.ForeColor = Color.FromArgb(51, 51, 51);
           label.MouseHover += label_MouseHover;
           label.MouseMove += label_MouseHover;
           label.MouseLeave += label_MouseLeave;
           label.Click += label_Click;
           panel.Controls.Add(label);
           this.Controls.Add(panel);
       }
   }

   /// <summary>
   /// 展开下拉
   /// </summary>
   private void DropList()
   {
       int count = ShowTextList.Count();
       if (count < 1)
           return;

       int invalCount = count;
       this.Height = this.Height + invalCount * 30 +1;//下拉行 行高为30

       AddList();
       g = this.CreateGraphics();
       g.DrawRectangle(new Pen(Brushes.Black), 0, 0, this.Width - 1, this.Height - 1);
       g.Dispose();

       IsDown = true;
       selectId = -1;
   }

   /// <summary>
   /// 关闭下拉
   /// </summary>
   private void CloseList()
   {
       List<Control> controlList = new List<Control>();
       foreach (Control item in this.Controls)
       {
           if (item.Name.Contains("panel"))
           {
               controlList.Add(item);
           }
       }
       foreach (var item in controlList)
       {
           this.Controls.Remove(item);
       }

       this.Height = 32;
       g = this.CreateGraphics();
       Color rectColor = Color.FromArgb(204, 204, 204);
       g.DrawRectangle(new Pen(Brushes.Black), 0, 0, this.Width - 1, this.Height - 1);
       g.Dispose();
       IsDown = false;
   }

   void panel_Click(object sender, EventArgs e)
   {
       PanelControl panel = (PanelControl)sender;
       string name = panel.Name;
       int index = int.Parse(name.Substring(5, name.Length - 5));
       SelectIndex = index;
       SelectValue = ShowTextList[index];
       this.textValue.Text = SelectValue;
       CloseList();
   }

   void label_Click(object sender, EventArgs e)
   {
       LabelControl lab = (LabelControl)sender;
       string name = lab.Name;
       int index = int.Parse(name.Substring(5, name.Length - 5));
       SelectIndex = index;
       SelectValue = ShowTextList[index];
       this.textValue.Text = SelectValue;
       CloseList();
   }

   void panel_MouseHover(object sender, EventArgs e)
   {
       PanelControl panel = (PanelControl)sender;
       panel.BackColor = Color.FromArgb(184, 39, 18);
       foreach (Control item in panel.Controls)
       {
           LabelControl lab = (LabelControl)item as LabelControl;
           lab.ForeColor = Color.White;
       }
   }

   void panel_MouseLeave(object sender, EventArgs e)
   {
       PanelControl panel = (PanelControl)sender;
       panel.BackColor = Color.White;
       foreach (Control item in panel.Controls)
       {
           LabelControl lab = (LabelControl)item as LabelControl;
           lab.ForeColor = Color.FromArgb(51, 51, 51);
       }
   }

   void label_MouseHover(object sender, EventArgs e)
   {
       LabelControl lab = (LabelControl)sender;
       lab.ForeColor = Color.White;
       PanelControl panel = (PanelControl)lab.Parent;
       panel.BackColor = Color.FromArgb(184, 39, 18);
   }

   void label_MouseLeave(object sender, EventArgs e)
   {
       LabelControl lab = (LabelControl)sender;
       lab.ForeColor = Color.FromArgb(51, 51, 51);
       PanelControl panel = (PanelControl)lab.Parent;
       panel.BackColor = Color.White;
   }

   private void textValue_TextChanged(object sender, EventArgs e)
   {
       string searchText = textValue.Text.Trim();
       if (String.IsNullOrEmpty(searchText))
           return;

       if (textList == null)
           return;

       ShowTextList.Clear();
       ShowTextList = textList.Where(s => s.Contains(searchText)).ToList();
       if (ShowTextList == null)
           return;
       if (ShowTextList.Count < 1)
           return;

       if (ShowTextList.Count > 4)
           ShowTextList = ShowTextList.GetRange(0, 4);

       CloseList();
       DropList();
   }

   private void IntellisenseTextBox_Paint(object sender, PaintEventArgs e)
   {
       Graphics gh = e.Graphics;
       Color rectColor = Color.FromArgb(204, 204, 204);
       gh.DrawRectangle(new Pen(Brushes.Black), 0, 0, this.Width - 1, this.Height - 1);
       gh.Dispose();
   }

   private int selectId = -1;

   protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
   {
       if (IsDown)
       {
           switch (keyData)
           {
               case Keys.Down:
                   if (selectId < ShowTextList.Count - 1)
                       selectId++;
                   foreach (Control item in this.Controls)
                   {
                       if (item.Name.Contains("panel"))
                       {
                           if (item.Tag.ToString() == selectId.ToString())
                           {
                               PanelControl panel = (PanelControl)item as PanelControl;
                               panel.BackColor = Color.FromArgb(184, 39, 18);
                               foreach (Control child in panel.Controls)
                               {
                                   LabelControl lab = (LabelControl)child as LabelControl;
                                   lab.ForeColor = Color.White;
                               }
                           }
                           else
                           {
                               PanelControl panel = (PanelControl)item;
                               panel.BackColor = Color.White;
                               foreach (Control child in panel.Controls)
                               {
                                   LabelControl lab = (LabelControl)child as LabelControl;
                                   lab.ForeColor = Color.FromArgb(51, 51, 51);
                               }
                           }
                       }
                   }
                   break;
               case Keys.Up:
                   if (selectId > 0)
                       selectId--;
                   foreach (Control item in this.Controls)
                   {
                       if (item.Name.Contains("panel"))
                       {
                           if (item.Tag.ToString() == selectId.ToString())
                           {
                               PanelControl panel = (PanelControl)item as PanelControl;
                               panel.BackColor = Color.FromArgb(184, 39, 18);
                               foreach (Control child in panel.Controls)
                               {
                                   LabelControl lab = (LabelControl)child as LabelControl;
                                   lab.ForeColor = Color.White;
                               }
                           }
                           else
                           {
                               PanelControl panel = (PanelControl)item;
                               panel.BackColor = Color.White;
                               foreach (Control child in panel.Controls)
                               {
                                   LabelControl lab = (LabelControl)child as LabelControl;
                                   lab.ForeColor = Color.FromArgb(51, 51, 51);
                               }
                           }
                       }
                   }
                   break;
               case Keys.Enter:
                   foreach (Control item in this.Controls)
                   {
                       if (item.Name.Contains("panel"))
                       {
                           if (item.Tag.ToString() == selectId.ToString())
                           {
                               PanelControl panel = (PanelControl)item as PanelControl;
                               foreach (Control child in panel.Controls)
                               {
                                   LabelControl lab = (LabelControl)child as LabelControl;
                                   this.textValue.Text = lab.Text;
                                   CloseList();
                                   break;
                               }
                           }
                       }
                   }
                   break;
           }
       }
       return base.ProcessCmdKey(ref msg, keyData);
   }
DreamSkin自定义美化控件-带智能下拉提示的TextBox控件

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