（四十九）c#Winform自定义控件-下拉框（表格）-HZHControls

官网

https://www.hzhcontrols.cn

前提

入行已经7,8年了，一直想做一套漂亮点的自定义控件，于是就有了本系列文章。

GitHub：https://github.com/kwwwvagaa/NetWinformControl

码云：https://gitee.com/kwwwvagaa/net_winform_custom_control.git

如果觉得写的还行，请点个 star 支持一下吧

欢迎前来交流探讨： 企鹅群568015492 

麻烦博客下方点个【推荐】，谢谢

NuGet

Install-Package HZH_Controls

目录

https://www.cnblogs.com/bfyx/p/11364884.html

用处及效果

  List<DataGridViewColumnEntity> lstCulumns = new List<DataGridViewColumnEntity>();
            lstCulumns.Add(new DataGridViewColumnEntity() { DataField = "ID", HeadText = "编号", Width = 70, WidthType = SizeType.Absolute });
            lstCulumns.Add(new DataGridViewColumnEntity() { DataField = "Name", HeadText = "姓名", Width = 100, WidthType = SizeType.Absolute });
            lstCulumns.Add(new DataGridViewColumnEntity() { DataField = "Age", HeadText = "年龄", Width = 100, WidthType = SizeType.Absolute });
            lstCulumns.Add(new DataGridViewColumnEntity() { DataField = "Birthday", HeadText = "生日", Width = 120, WidthType = SizeType.Absolute, Format = (a) => { return ((DateTime)a).ToString("yyyy-MM-dd"); } });
            lstCulumns.Add(new DataGridViewColumnEntity() { DataField = "Sex", HeadText = "性别", Width = 100, WidthType = SizeType.Absolute, Format = (a) => { return ((int)a) == 0 ? "女" : "男"; } });
            this.ucComboxGrid1.GridColumns = lstCulumns;
            List<object> lstSourceGrid = new List<object>();
            for (int i = 0; i < 100; i++)
            {
                TestModel model = new TestModel()
                {
                    ID = i.ToString(),
                    Age = 3 * i,
                    Name = "姓名——" + i,
                    Birthday = DateTime.Now.AddYears(-10),
                    Sex = i % 2
                };
                lstSourceGrid.Add(model);
            }
            this.ucComboxGrid1.GridDataSource = lstSourceGrid;

 

准备工作

此控件继承自UCCombox，并且需要表格控件UCDataGridView，如果不了解请移步查看

（三十五）c#Winform自定义控件-下拉框

（三十二）c#Winform自定义控件-表格

如果你想显示树形结构，请移步查看

（四十七）c#Winform自定义控件-树表格（treeGrid）

开始

我们首先需要一个弹出的面板，那么我们先添加一个用户控件UCComboxGridPanel，在这个用户控件上添加一个文本框进行搜索，添加一个表格展示数据

一些属性

 [Description("项点击事件"), Category("自定义")]
        public event DataGridViewEventHandler ItemClick;
        private Type m_rowType = typeof(UCDataGridViewRow);

        public Type RowType
        {
            get { return m_rowType; }
            set
            {
                m_rowType = value;
                this.ucDataGridView1.RowType = m_rowType;
            }
        }

        private List<DataGridViewColumnEntity> m_columns = null;

        public List<DataGridViewColumnEntity> Columns
        {
            get { return m_columns; }
            set
            {
                m_columns = value;
                this.ucDataGridView1.Columns = value;
            }
        }
        private List<object> m_dataSource = null;

        public List<object> DataSource
        {
            get { return m_dataSource; }
            set { m_dataSource = value; }
        }

        private string strLastSearchText = string.Empty;
        UCPagerControl m_page = new UCPagerControl();

一些事件，处理数据绑定

 void ucDataGridView1_ItemClick(object sender, DataGridViewEventArgs e)
        {
            if (ItemClick != null)
            {
                ItemClick((sender as IDataGridViewRow).DataSource, null);
            }
        }

        void txtInput_TextChanged(object sender, EventArgs e)
        {
            timer1.Enabled = false;
            timer1.Enabled = true;
        }

        private void UCComboxGridPanel_Load(object sender, EventArgs e)
        {
            m_page.DataSource = m_dataSource;
            this.ucDataGridView1.DataSource = m_page.GetCurrentSource();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (strLastSearchText == txtSearch.InputText)
            {
                timer1.Enabled = false;
            }
            else
            {
                strLastSearchText = txtSearch.InputText;
                Search(txtSearch.InputText);
            }
        }

        private void Search(string strText)
        {
            m_page.StartIndex = 0;
            if (!string.IsNullOrEmpty(strText))
            {
                strText = strText.ToLower();
                List<object> lst = m_dataSource.FindAll(p => m_columns.Any(c => (c.Format == null ? (p.GetType().GetProperty(c.DataField).GetValue(p, null).ToStringExt()) : c.Format(p.GetType().GetProperty(c.DataField).GetValue(p, null))).ToLower().Contains(strText)));
                m_page.DataSource = lst;
            }
            else
            {
                m_page.DataSource = m_dataSource;
            }
            m_page.Reload();
        }

完整代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace HZH_Controls.Controls.ComboBox
{
    [ToolboxItem(false)]
    public partial class UCComboxGridPanel : UserControl
    {
        [Description("项点击事件"), Category("自定义")]
        public event DataGridViewEventHandler ItemClick;
        private Type m_rowType = typeof(UCDataGridViewRow);

        public Type RowType
        {
            get { return m_rowType; }
            set
            {
                m_rowType = value;
                this.ucDataGridView1.RowType = m_rowType;
            }
        }

        private List<DataGridViewColumnEntity> m_columns = null;

        public List<DataGridViewColumnEntity> Columns
        {
            get { return m_columns; }
            set
            {
                m_columns = value;
                this.ucDataGridView1.Columns = value;
            }
        }
        private List<object> m_dataSource = null;

        public List<object> DataSource
        {
            get { return m_dataSource; }
            set { m_dataSource = value; }
        }

        private string strLastSearchText = string.Empty;
        UCPagerControl m_page = new UCPagerControl();

        public UCComboxGridPanel()
        {
            InitializeComponent();
            this.ucDataGridView1.Page = m_page;
            this.ucDataGridView1.IsAutoHeight = false;
            this.txtSearch.txtInput.TextChanged += txtInput_TextChanged;
            this.ucDataGridView1.ItemClick += ucDataGridView1_ItemClick;
        }

        void ucDataGridView1_ItemClick(object sender, DataGridViewEventArgs e)
        {
            if (ItemClick != null)
            {
                ItemClick((sender as IDataGridViewRow).DataSource, null);
            }
        }

        void txtInput_TextChanged(object sender, EventArgs e)
        {
            timer1.Enabled = false;
            timer1.Enabled = true;
        }

        private void UCComboxGridPanel_Load(object sender, EventArgs e)
        {
            m_page.DataSource = m_dataSource;
            this.ucDataGridView1.DataSource = m_page.GetCurrentSource();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (strLastSearchText == txtSearch.InputText)
            {
                timer1.Enabled = false;
            }
            else
            {
                strLastSearchText = txtSearch.InputText;
                Search(txtSearch.InputText);
            }
        }

        private void Search(string strText)
        {
            m_page.StartIndex = 0;
            if (!string.IsNullOrEmpty(strText))
            {
                strText = strText.ToLower();
                List<object> lst = m_dataSource.FindAll(p => m_columns.Any(c => (c.Format == null ? (p.GetType().GetProperty(c.DataField).GetValue(p, null).ToStringExt()) : c.Format(p.GetType().GetProperty(c.DataField).GetValue(p, null))).ToLower().Contains(strText)));
                m_page.DataSource = lst;
            }
            else
            {
                m_page.DataSource = m_dataSource;
            }
            m_page.Reload();
        }
    }
}

namespace HZH_Controls.Controls.ComboBox
{
    partial class UCComboxGridPanel
    {
        /// <summary> 
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary> 
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region 组件设计器生成的代码

        /// <summary> 
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.panel1 = new System.Windows.Forms.Panel();
            this.panel2 = new System.Windows.Forms.Panel();
            this.timer1 = new System.Windows.Forms.Timer(this.components);
            this.ucControlBase1 = new HZH_Controls.Controls.UCControlBase();
            this.ucDataGridView1 = new HZH_Controls.Controls.UCDataGridView();
            this.txtSearch = new HZH_Controls.Controls.UCTextBoxEx();
            this.ucSplitLine_V2 = new HZH_Controls.Controls.UCSplitLine_V();
            this.ucSplitLine_V1 = new HZH_Controls.Controls.UCSplitLine_V();
            this.ucSplitLine_H2 = new HZH_Controls.Controls.UCSplitLine_H();
            this.ucSplitLine_H1 = new HZH_Controls.Controls.UCSplitLine_H();
            this.panel1.SuspendLayout();
            this.ucControlBase1.SuspendLayout();
            this.SuspendLayout();
            // 
            // panel1
            // 
            this.panel1.Controls.Add(this.ucControlBase1);
            this.panel1.Controls.Add(this.panel2);
            this.panel1.Controls.Add(this.txtSearch);
            this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.panel1.Location = new System.Drawing.Point(1, 1);
            this.panel1.Name = "panel1";
            this.panel1.Padding = new System.Windows.Forms.Padding(5);
            this.panel1.Size = new System.Drawing.Size(447, 333);
            this.panel1.TabIndex = 4;
            // 
            // panel2
            // 
            this.panel2.Dock = System.Windows.Forms.DockStyle.Top;
            this.panel2.Location = new System.Drawing.Point(5, 47);
            this.panel2.Name = "panel2";
            this.panel2.Size = new System.Drawing.Size(437, 15);
            this.panel2.TabIndex = 1;
            // 
            // timer1
            // 
            this.timer1.Interval = 1000;
            this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
            // 
            // ucControlBase1
            // 
            this.ucControlBase1.ConerRadius = 5;
            this.ucControlBase1.Controls.Add(this.ucDataGridView1);
            this.ucControlBase1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.ucControlBase1.FillColor = System.Drawing.Color.Transparent;
            this.ucControlBase1.Font = new System.Drawing.Font("微软雅黑", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Pixel);
            this.ucControlBase1.IsRadius = false;
            this.ucControlBase1.IsShowRect = true;
            this.ucControlBase1.Location = new System.Drawing.Point(5, 62);
            this.ucControlBase1.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5);
            this.ucControlBase1.Name = "ucControlBase1";
            this.ucControlBase1.Padding = new System.Windows.Forms.Padding(5);
            this.ucControlBase1.RectColor = System.Drawing.Color.FromArgb(((int)(((byte)(220)))), ((int)(((byte)(220)))), ((int)(((byte)(220)))));
            this.ucControlBase1.RectWidth = 1;
            this.ucControlBase1.Size = new System.Drawing.Size(437, 266);
            this.ucControlBase1.TabIndex = 2;
            this.ucControlBase1.TabStop = false;
            // 
            // ucDataGridView1
            // 
            this.ucDataGridView1.BackColor = System.Drawing.Color.White;
            this.ucDataGridView1.Columns = null;
            this.ucDataGridView1.DataSource = null;
            this.ucDataGridView1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.ucDataGridView1.HeadFont = new System.Drawing.Font("微软雅黑", 12F);
            this.ucDataGridView1.HeadHeight = 40;
            this.ucDataGridView1.HeadPadingLeft = 0;
            this.ucDataGridView1.HeadTextColor = System.Drawing.Color.Black;
            this.ucDataGridView1.IsAutoHeight = false;
            this.ucDataGridView1.IsShowCheckBox = false;
            this.ucDataGridView1.IsShowHead = true;
            this.ucDataGridView1.Location = new System.Drawing.Point(5, 5);
            this.ucDataGridView1.Name = "ucDataGridView1";
            this.ucDataGridView1.Page = null;
            this.ucDataGridView1.RowHeight = 30;
            this.ucDataGridView1.RowType = typeof(HZH_Controls.Controls.UCDataGridViewRow);
            this.ucDataGridView1.Size = new System.Drawing.Size(427, 256);
            this.ucDataGridView1.TabIndex = 0;
            this.ucDataGridView1.TabStop = false;
            // 
            // txtSearch
            // 
            this.txtSearch.BackColor = System.Drawing.Color.Transparent;
            this.txtSearch.ConerRadius = 5;
            this.txtSearch.Cursor = System.Windows.Forms.Cursors.IBeam;
            this.txtSearch.DecLength = 2;
            this.txtSearch.Dock = System.Windows.Forms.DockStyle.Top;
            this.txtSearch.FillColor = System.Drawing.Color.Empty;
            this.txtSearch.Font = new System.Drawing.Font("微软雅黑", 18F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Pixel);
            this.txtSearch.InputText = "";
            this.txtSearch.InputType = HZH_Controls.TextInputType.NotControl;
            this.txtSearch.IsFocusColor = true;
            this.txtSearch.IsRadius = true;
            this.txtSearch.IsShowClearBtn = true;
            this.txtSearch.IsShowKeyboard = false;
            this.txtSearch.IsShowRect = true;
            this.txtSearch.IsShowSearchBtn = false;
            this.txtSearch.KeyBoardType = HZH_Controls.Controls.KeyBoardType.UCKeyBorderAll_EN;
            this.txtSearch.Location = new System.Drawing.Point(5, 5);
            this.txtSearch.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5);
            this.txtSearch.MaxValue = new decimal(new int[] {
            1000000,
            0,
            0,
            0});
            this.txtSearch.MinValue = new decimal(new int[] {
            1000000,
            0,
            0,
            -2147483648});
            this.txtSearch.Name = "txtSearch";
            this.txtSearch.Padding = new System.Windows.Forms.Padding(5);
            this.txtSearch.PromptColor = System.Drawing.Color.Gray;
            this.txtSearch.PromptFont = new System.Drawing.Font("微软雅黑", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Pixel);
            this.txtSearch.PromptText = "输入内容模糊搜索";
            this.txtSearch.RectColor = System.Drawing.Color.FromArgb(((int)(((byte)(220)))), ((int)(((byte)(220)))), ((int)(((byte)(220)))));
            this.txtSearch.RectWidth = 1;
            this.txtSearch.RegexPattern = "";
            this.txtSearch.Size = new System.Drawing.Size(437, 42);
            this.txtSearch.TabIndex = 0;
            // 
            // ucSplitLine_V2
            // 
            this.ucSplitLine_V2.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(232)))), ((int)(((byte)(232)))), ((int)(((byte)(232)))));
            this.ucSplitLine_V2.Dock = System.Windows.Forms.DockStyle.Right;
            this.ucSplitLine_V2.Location = new System.Drawing.Point(448, 1);
            this.ucSplitLine_V2.Name = "ucSplitLine_V2";
            this.ucSplitLine_V2.Size = new System.Drawing.Size(1, 333);
            this.ucSplitLine_V2.TabIndex = 3;
            this.ucSplitLine_V2.TabStop = false;
            // 
            // ucSplitLine_V1
            // 
            this.ucSplitLine_V1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(232)))), ((int)(((byte)(232)))), ((int)(((byte)(232)))));
            this.ucSplitLine_V1.Dock = System.Windows.Forms.DockStyle.Left;
            this.ucSplitLine_V1.Location = new System.Drawing.Point(0, 1);
            this.ucSplitLine_V1.Name = "ucSplitLine_V1";
            this.ucSplitLine_V1.Size = new System.Drawing.Size(1, 333);
            this.ucSplitLine_V1.TabIndex = 2;
            this.ucSplitLine_V1.TabStop = false;
            // 
            // ucSplitLine_H2
            // 
            this.ucSplitLine_H2.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(232)))), ((int)(((byte)(232)))), ((int)(((byte)(232)))));
            this.ucSplitLine_H2.Dock = System.Windows.Forms.DockStyle.Bottom;
            this.ucSplitLine_H2.Location = new System.Drawing.Point(0, 334);
            this.ucSplitLine_H2.Name = "ucSplitLine_H2";
            this.ucSplitLine_H2.Size = new System.Drawing.Size(449, 1);
            this.ucSplitLine_H2.TabIndex = 1;
            this.ucSplitLine_H2.TabStop = false;
            // 
            // ucSplitLine_H1
            // 
            this.ucSplitLine_H1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(232)))), ((int)(((byte)(232)))), ((int)(((byte)(232)))));
            this.ucSplitLine_H1.Dock = System.Windows.Forms.DockStyle.Top;
            this.ucSplitLine_H1.Location = new System.Drawing.Point(0, 0);
            this.ucSplitLine_H1.Name = "ucSplitLine_H1";
            this.ucSplitLine_H1.Size = new System.Drawing.Size(449, 1);
            this.ucSplitLine_H1.TabIndex = 0;
            this.ucSplitLine_H1.TabStop = false;
            // 
            // UCComboxGridPanel
            // 
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
            this.BackColor = System.Drawing.Color.White;
            this.Controls.Add(this.panel1);
            this.Controls.Add(this.ucSplitLine_V2);
            this.Controls.Add(this.ucSplitLine_V1);
            this.Controls.Add(this.ucSplitLine_H2);
            this.Controls.Add(this.ucSplitLine_H1);
            this.Name = "UCComboxGridPanel";
            this.Size = new System.Drawing.Size(449, 335);
            this.Load += new System.EventHandler(this.UCComboxGridPanel_Load);
            this.panel1.ResumeLayout(false);
            this.ucControlBase1.ResumeLayout(false);
            this.ResumeLayout(false);

        }

        #endregion

        private UCSplitLine_H ucSplitLine_H1;
        private UCSplitLine_H ucSplitLine_H2;
        private UCSplitLine_V ucSplitLine_V1;
        private UCSplitLine_V ucSplitLine_V2;
        private System.Windows.Forms.Panel panel1;
        private UCControlBase ucControlBase1;
        private UCDataGridView ucDataGridView1;
        private System.Windows.Forms.Panel panel2;
        private System.Windows.Forms.Timer timer1;
        private UCTextBoxEx txtSearch;
    }
}

以上，弹出面板完成，下面就是下拉控件了

添加一个用户控件UCComboxGrid，继承UCCombox

一些属性

 private Type m_rowType = typeof(UCDataGridViewRow);

        [Description("表格行类型"), Category("自定义")]
        public Type GridRowType
        {
            get { return m_rowType; }
            set
            {
                m_rowType = value;
            }
        }
        int intWidth = 0;

        private List<DataGridViewColumnEntity> m_columns = null;

        [Description("表格列"), Category("自定义")]
        public List<DataGridViewColumnEntity> GridColumns
        {
            get { return m_columns; }
            set
            {
                m_columns = value;
                if (value != null)
                    intWidth = value.Sum(p => p.WidthType == SizeType.Absolute ? p.Width : (p.Width < 80 ? 80 : p.Width));
            }
        }
        private List<object> m_dataSource = null;

        [Description("表格数据源"), Category("自定义")]
        public List<object> GridDataSource
        {
            get { return m_dataSource; }
            set { m_dataSource = value; }
        }

        private string m_textField;

        [Description("显示值字段名称"), Category("自定义")]
        public string TextField
        {
            get { return m_textField; }
            set
            {
                m_textField = value;
                SetText();
            }
        }
        [Obsolete("不再可用的属性")]
        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
        private new ComboBoxStyle BoxStyle
        {
            get;
            set;
        }
        private object selectSource = null;

        [Description("选中的数据源"), Category("自定义")]
        public object SelectSource
        {
            get { return selectSource; }
            set
            {
                selectSource = value;
                SetText();
                if (SelectedChangedEvent != null)
                {
                    SelectedChangedEvent(value, null);
                }
            }
        }

 [Description("选中数据源改变事件"), Category("自定义")]
        public new event EventHandler SelectedChangedEvent;

重写点击事件来处理弹出

 protected override void click_MouseDown(object sender, MouseEventArgs e)
        {
            if (m_columns == null || m_columns.Count <= 0)
                return;
            if (m_ucPanel == null)
            {
                var p = this.Parent.PointToScreen(this.Location);
                int intScreenHeight = Screen.PrimaryScreen.Bounds.Height;
                int intHeight = Math.Max(p.Y, intScreenHeight - p.Y - this.Height);
                intHeight -= 100;
                m_ucPanel = new UCComboxGridPanel();
                m_ucPanel.ItemClick += m_ucPanel_ItemClick;
                m_ucPanel.Height = intHeight;
                m_ucPanel.Width = intWidth;
                m_ucPanel.Columns = m_columns;
                m_ucPanel.RowType = m_rowType;
                if (m_dataSource != null && m_dataSource.Count > 0)
                {
                    int _intHeight = Math.Min(110 + m_dataSource.Count * 36, m_ucPanel.Height);
                    m_ucPanel.Height = _intHeight;
                }
            }
            m_ucPanel.DataSource = m_dataSource;
            if (_frmAnchor == null || _frmAnchor.IsDisposed || _frmAnchor.Visible == false)
            {
                _frmAnchor = new Forms.FrmAnchor(this, m_ucPanel);
                _frmAnchor.Show(this.FindForm());
            }

        }

        void m_ucPanel_ItemClick(object sender, DataGridViewEventArgs e)
        {
            _frmAnchor.Hide();
            SelectSource = sender;
        }

        private void SetText()
        {
            if (!string.IsNullOrEmpty(m_textField) && selectSource != null)
            {
                var pro = selectSource.GetType().GetProperty(m_textField);
                if (pro != null)
                {
                    TextValue = pro.GetValue(selectSource, null).ToStringExt();
                }
            }
        }

完整代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using HZH_Controls.Controls;

namespace HZH_Controls.Controls.ComboBox
{
    public partial class UCComboxGrid : UCCombox
    {

        private Type m_rowType = typeof(UCDataGridViewRow);

        [Description("表格行类型"), Category("自定义")]
        public Type GridRowType
        {
            get { return m_rowType; }
            set
            {
                m_rowType = value;
            }
        }
        int intWidth = 0;

        private List<DataGridViewColumnEntity> m_columns = null;

        [Description("表格列"), Category("自定义")]
        public List<DataGridViewColumnEntity> GridColumns
        {
            get { return m_columns; }
            set
            {
                m_columns = value;
                if (value != null)
                    intWidth = value.Sum(p => p.WidthType == SizeType.Absolute ? p.Width : (p.Width < 80 ? 80 : p.Width));
            }
        }
        private List<object> m_dataSource = null;

        [Description("表格数据源"), Category("自定义")]
        public List<object> GridDataSource
        {
            get { return m_dataSource; }
            set { m_dataSource = value; }
        }

        private string m_textField;

        [Description("显示值字段名称"), Category("自定义")]
        public string TextField
        {
            get { return m_textField; }
            set
            {
                m_textField = value;
                SetText();
            }
        }
        [Obsolete("不再可用的属性")]
        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
        private new ComboBoxStyle BoxStyle
        {
            get;
            set;
        }
        private object selectSource = null;

        [Description("选中的数据源"), Category("自定义")]
        public object SelectSource
        {
            get { return selectSource; }
            set
            {
                selectSource = value;
                SetText();
                if (SelectedChangedEvent != null)
                {
                    SelectedChangedEvent(value, null);
                }
            }
        }

      

        [Description("选中数据源改变事件"), Category("自定义")]
        public new event EventHandler SelectedChangedEvent;
        public UCComboxGrid()
        {
            InitializeComponent();
        }
        UCComboxGridPanel m_ucPanel = null;
        Forms.FrmAnchor _frmAnchor;
        protected override void click_MouseDown(object sender, MouseEventArgs e)
        {
            if (m_columns == null || m_columns.Count <= 0)
                return;
            if (m_ucPanel == null)
            {
                var p = this.Parent.PointToScreen(this.Location);
                int intScreenHeight = Screen.PrimaryScreen.Bounds.Height;
                int intHeight = Math.Max(p.Y, intScreenHeight - p.Y - this.Height);
                intHeight -= 100;
                m_ucPanel = new UCComboxGridPanel();
                m_ucPanel.ItemClick += m_ucPanel_ItemClick;
                m_ucPanel.Height = intHeight;
                m_ucPanel.Width = intWidth;
                m_ucPanel.Columns = m_columns;
                m_ucPanel.RowType = m_rowType;
                if (m_dataSource != null && m_dataSource.Count > 0)
                {
                    int _intHeight = Math.Min(110 + m_dataSource.Count * 36, m_ucPanel.Height);
                    m_ucPanel.Height = _intHeight;
                }
            }
            m_ucPanel.DataSource = m_dataSource;
            if (_frmAnchor == null || _frmAnchor.IsDisposed || _frmAnchor.Visible == false)
            {
                _frmAnchor = new Forms.FrmAnchor(this, m_ucPanel);
                _frmAnchor.Show(this.FindForm());
            }

        }

        void m_ucPanel_ItemClick(object sender, DataGridViewEventArgs e)
        {
            _frmAnchor.Hide();
            SelectSource = sender;
        }

        private void SetText()
        {
            if (!string.IsNullOrEmpty(m_textField) && selectSource != null)
            {
                var pro = selectSource.GetType().GetProperty(m_textField);
                if (pro != null)
                {
                    TextValue = pro.GetValue(selectSource, null).ToStringExt();
                }
            }
        }
    }
}

namespace HZH_Controls.Controls.ComboBox
{
    partial class UCComboxGrid
    {
        /// <summary> 
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary> 
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region 组件设计器生成的代码

        /// <summary> 
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.SuspendLayout();
            // 
            // txtInput
            // 
            this.txtInput.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(240)))), ((int)(((byte)(240)))), ((int)(((byte)(240)))));
            // 
            // UCComboxGrid
            // 
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
            this.BackColor = System.Drawing.Color.Transparent;
            this.BoxStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
            this.FillColor = System.Drawing.Color.FromArgb(((int)(((byte)(240)))), ((int)(((byte)(240)))), ((int)(((byte)(240)))));
            this.Name = "UCComboxGrid";
            this.RectColor = System.Drawing.Color.FromArgb(((int)(((byte)(240)))), ((int)(((byte)(240)))), ((int)(((byte)(240)))));
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

    }
}

以上就是全部东西了

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