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

官网

http://www.hzhcontrols.com

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

用处及效果

 1   List<DataGridViewColumnEntity> lstCulumns = new List<DataGridViewColumnEntity>();
 2             lstCulumns.Add(new DataGridViewColumnEntity() { DataField = "ID", HeadText = "编号", Width = 70, WidthType = SizeType.Absolute });
 3             lstCulumns.Add(new DataGridViewColumnEntity() { DataField = "Name", HeadText = "姓名", Width = 100, WidthType = SizeType.Absolute });
 4             lstCulumns.Add(new DataGridViewColumnEntity() { DataField = "Age", HeadText = "年龄", Width = 100, WidthType = SizeType.Absolute });
 5             lstCulumns.Add(new DataGridViewColumnEntity() { DataField = "Birthday", HeadText = "生日", Width = 120, WidthType = SizeType.Absolute, Format = (a) => { return ((DateTime)a).ToString("yyyy-MM-dd"); } });
 6             lstCulumns.Add(new DataGridViewColumnEntity() { DataField = "Sex", HeadText = "性别", Width = 100, WidthType = SizeType.Absolute, Format = (a) => { return ((int)a) == 0 ? "女" : "男"; } });
 7             this.ucComboxGrid1.GridColumns = lstCulumns;
 8             List<object> lstSourceGrid = new List<object>();
 9             for (int i = 0; i < 100; i++)
10             {
11                 TestModel model = new TestModel()
12                 {
13                     ID = i.ToString(),
14                     Age = 3 * i,
15                     Name = "姓名——" + i,
16                     Birthday = DateTime.Now.AddYears(-10),
17                     Sex = i % 2
18                 };
19                 lstSourceGrid.Add(model);
20             }
21             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

 1  [Description("项点击事件"), Category("自定义")]
 2         public event DataGridViewEventHandler ItemClick;
 3         private Type m_rowType = typeof(UCDataGridViewRow);
 4 
 5         public Type RowType
 6         {
 7             get { return m_rowType; }
 8             set
 9             {
10                 m_rowType = value;
11                 this.ucDataGridView1.RowType = m_rowType;
12             }
13         }
14 
15         private List<DataGridViewColumnEntity> m_columns = null;
16 
17         public List<DataGridViewColumnEntity> Columns
18         {
19             get { return m_columns; }
20             set
21             {
22                 m_columns = value;
23                 this.ucDataGridView1.Columns = value;
24             }
25         }
26         private List<object> m_dataSource = null;
27 
28         public List<object> DataSource
29         {
30             get { return m_dataSource; }
31             set { m_dataSource = value; }
32         }
33 
34         private string strLastSearchText = string.Empty;
35         UCPagerControl m_page = new UCPagerControl();

一些事件，处理数据绑定

 1  void ucDataGridView1_ItemClick(object sender, DataGridViewEventArgs e)
 2         {
 3             if (ItemClick != null)
 4             {
 5                 ItemClick((sender as IDataGridViewRow).DataSource, null);
 6             }
 7         }
 8 
 9         void txtInput_TextChanged(object sender, EventArgs e)
10         {
11             timer1.Enabled = false;
12             timer1.Enabled = true;
13         }
14 
15         private void UCComboxGridPanel_Load(object sender, EventArgs e)
16         {
17             m_page.DataSource = m_dataSource;
18             this.ucDataGridView1.DataSource = m_page.GetCurrentSource();
19         }
20 
21         private void timer1_Tick(object sender, EventArgs e)
22         {
23             if (strLastSearchText == txtSearch.InputText)
24             {
25                 timer1.Enabled = false;
26             }
27             else
28             {
29                 strLastSearchText = txtSearch.InputText;
30                 Search(txtSearch.InputText);
31             }
32         }
33 
34         private void Search(string strText)
35         {
36             m_page.StartIndex = 0;
37             if (!string.IsNullOrEmpty(strText))
38             {
39                 strText = strText.ToLower();
40                 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)));
41                 m_page.DataSource = lst;
42             }
43             else
44             {
45                 m_page.DataSource = m_dataSource;
46             }
47             m_page.Reload();
48         }

完整代码

  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Drawing;
  5 using System.Data;
  6 using System.Linq;
  7 using System.Text;
  8 using System.Windows.Forms;
  9 
 10 namespace HZH_Controls.Controls.ComboBox
 11 {
 12     [ToolboxItem(false)]
 13     public partial class UCComboxGridPanel : UserControl
 14     {
 15         [Description("项点击事件"), Category("自定义")]
 16         public event DataGridViewEventHandler ItemClick;
 17         private Type m_rowType = typeof(UCDataGridViewRow);
 18 
 19         public Type RowType
 20         {
 21             get { return m_rowType; }
 22             set
 23             {
 24                 m_rowType = value;
 25                 this.ucDataGridView1.RowType = m_rowType;
 26             }
 27         }
 28 
 29         private List<DataGridViewColumnEntity> m_columns = null;
 30 
 31         public List<DataGridViewColumnEntity> Columns
 32         {
 33             get { return m_columns; }
 34             set
 35             {
 36                 m_columns = value;
 37                 this.ucDataGridView1.Columns = value;
 38             }
 39         }
 40         private List<object> m_dataSource = null;
 41 
 42         public List<object> DataSource
 43         {
 44             get { return m_dataSource; }
 45             set { m_dataSource = value; }
 46         }
 47 
 48         private string strLastSearchText = string.Empty;
 49         UCPagerControl m_page = new UCPagerControl();
 50 
 51         public UCComboxGridPanel()
 52         {
 53             InitializeComponent();
 54             this.ucDataGridView1.Page = m_page;
 55             this.ucDataGridView1.IsAutoHeight = false;
 56             this.txtSearch.txtInput.TextChanged += txtInput_TextChanged;
 57             this.ucDataGridView1.ItemClick += ucDataGridView1_ItemClick;
 58         }
 59 
 60         void ucDataGridView1_ItemClick(object sender, DataGridViewEventArgs e)
 61         {
 62             if (ItemClick != null)
 63             {
 64                 ItemClick((sender as IDataGridViewRow).DataSource, null);
 65             }
 66         }
 67 
 68         void txtInput_TextChanged(object sender, EventArgs e)
 69         {
 70             timer1.Enabled = false;
 71             timer1.Enabled = true;
 72         }
 73 
 74         private void UCComboxGridPanel_Load(object sender, EventArgs e)
 75         {
 76             m_page.DataSource = m_dataSource;
 77             this.ucDataGridView1.DataSource = m_page.GetCurrentSource();
 78         }
 79 
 80         private void timer1_Tick(object sender, EventArgs e)
 81         {
 82             if (strLastSearchText == txtSearch.InputText)
 83             {
 84                 timer1.Enabled = false;
 85             }
 86             else
 87             {
 88                 strLastSearchText = txtSearch.InputText;
 89                 Search(txtSearch.InputText);
 90             }
 91         }
 92 
 93         private void Search(string strText)
 94         {
 95             m_page.StartIndex = 0;
 96             if (!string.IsNullOrEmpty(strText))
 97             {
 98                 strText = strText.ToLower();
 99                 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)));
100                 m_page.DataSource = lst;
101             }
102             else
103             {
104                 m_page.DataSource = m_dataSource;
105             }
106             m_page.Reload();
107         }
108     }
109 }

View Code

  1 namespace HZH_Controls.Controls.ComboBox
  2 {
  3     partial class UCComboxGridPanel
  4     {
  5         /// <summary> 
  6         /// 必需的设计器变量。
  7         /// </summary>
  8         private System.ComponentModel.IContainer components = null;
  9 
 10         /// <summary> 
 11         /// 清理所有正在使用的资源。
 12         /// </summary>
 13         /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
 14         protected override void Dispose(bool disposing)
 15         {
 16             if (disposing && (components != null))
 17             {
 18                 components.Dispose();
 19             }
 20             base.Dispose(disposing);
 21         }
 22 
 23         #region 组件设计器生成的代码
 24 
 25         /// <summary> 
 26         /// 设计器支持所需的方法 - 不要
 27         /// 使用代码编辑器修改此方法的内容。
 28         /// </summary>
 29         private void InitializeComponent()
 30         {
 31             this.components = new System.ComponentModel.Container();
 32             this.panel1 = new System.Windows.Forms.Panel();
 33             this.panel2 = new System.Windows.Forms.Panel();
 34             this.timer1 = new System.Windows.Forms.Timer(this.components);
 35             this.ucControlBase1 = new HZH_Controls.Controls.UCControlBase();
 36             this.ucDataGridView1 = new HZH_Controls.Controls.UCDataGridView();
 37             this.txtSearch = new HZH_Controls.Controls.UCTextBoxEx();
 38             this.ucSplitLine_V2 = new HZH_Controls.Controls.UCSplitLine_V();
 39             this.ucSplitLine_V1 = new HZH_Controls.Controls.UCSplitLine_V();
 40             this.ucSplitLine_H2 = new HZH_Controls.Controls.UCSplitLine_H();
 41             this.ucSplitLine_H1 = new HZH_Controls.Controls.UCSplitLine_H();
 42             this.panel1.SuspendLayout();
 43             this.ucControlBase1.SuspendLayout();
 44             this.SuspendLayout();
 45             // 
 46             // panel1
 47             // 
 48             this.panel1.Controls.Add(this.ucControlBase1);
 49             this.panel1.Controls.Add(this.panel2);
 50             this.panel1.Controls.Add(this.txtSearch);
 51             this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
 52             this.panel1.Location = new System.Drawing.Point(1, 1);
 53             this.panel1.Name = "panel1";
 54             this.panel1.Padding = new System.Windows.Forms.Padding(5);
 55             this.panel1.Size = new System.Drawing.Size(447, 333);
 56             this.panel1.TabIndex = 4;
 57             // 
 58             // panel2
 59             // 
 60             this.panel2.Dock = System.Windows.Forms.DockStyle.Top;
 61             this.panel2.Location = new System.Drawing.Point(5, 47);
 62             this.panel2.Name = "panel2";
 63             this.panel2.Size = new System.Drawing.Size(437, 15);
 64             this.panel2.TabIndex = 1;
 65             // 
 66             // timer1
 67             // 
 68             this.timer1.Interval = 1000;
 69             this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
 70             // 
 71             // ucControlBase1
 72             // 
 73             this.ucControlBase1.ConerRadius = 5;
 74             this.ucControlBase1.Controls.Add(this.ucDataGridView1);
 75             this.ucControlBase1.Dock = System.Windows.Forms.DockStyle.Fill;
 76             this.ucControlBase1.FillColor = System.Drawing.Color.Transparent;
 77             this.ucControlBase1.Font = new System.Drawing.Font("微软雅黑", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Pixel);
 78             this.ucControlBase1.IsRadius = false;
 79             this.ucControlBase1.IsShowRect = true;
 80             this.ucControlBase1.Location = new System.Drawing.Point(5, 62);
 81             this.ucControlBase1.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5);
 82             this.ucControlBase1.Name = "ucControlBase1";
 83             this.ucControlBase1.Padding = new System.Windows.Forms.Padding(5);
 84             this.ucControlBase1.RectColor = System.Drawing.Color.FromArgb(((int)(((byte)(220)))), ((int)(((byte)(220)))), ((int)(((byte)(220)))));
 85             this.ucControlBase1.RectWidth = 1;
 86             this.ucControlBase1.Size = new System.Drawing.Size(437, 266);
 87             this.ucControlBase1.TabIndex = 2;
 88             this.ucControlBase1.TabStop = false;
 89             // 
 90             // ucDataGridView1
 91             // 
 92             this.ucDataGridView1.BackColor = System.Drawing.Color.White;
 93             this.ucDataGridView1.Columns = null;
 94             this.ucDataGridView1.DataSource = null;
 95             this.ucDataGridView1.Dock = System.Windows.Forms.DockStyle.Fill;
 96             this.ucDataGridView1.HeadFont = new System.Drawing.Font("微软雅黑", 12F);
 97             this.ucDataGridView1.HeadHeight = 40;
 98             this.ucDataGridView1.HeadPadingLeft = 0;
 99             this.ucDataGridView1.HeadTextColor = System.Drawing.Color.Black;
100             this.ucDataGridView1.IsAutoHeight = false;
101             this.ucDataGridView1.IsShowCheckBox = false;
102             this.ucDataGridView1.IsShowHead = true;
103             this.ucDataGridView1.Location = new System.Drawing.Point(5, 5);
104             this.ucDataGridView1.Name = "ucDataGridView1";
105             this.ucDataGridView1.Page = null;
106             this.ucDataGridView1.RowHeight = 30;
107             this.ucDataGridView1.RowType = typeof(HZH_Controls.Controls.UCDataGridViewRow);
108             this.ucDataGridView1.Size = new System.Drawing.Size(427, 256);
109             this.ucDataGridView1.TabIndex = 0;
110             this.ucDataGridView1.TabStop = false;
111             // 
112             // txtSearch
113             // 
114             this.txtSearch.BackColor = System.Drawing.Color.Transparent;
115             this.txtSearch.ConerRadius = 5;
116             this.txtSearch.Cursor = System.Windows.Forms.Cursors.IBeam;
117             this.txtSearch.DecLength = 2;
118             this.txtSearch.Dock = System.Windows.Forms.DockStyle.Top;
119             this.txtSearch.FillColor = System.Drawing.Color.Empty;
120             this.txtSearch.Font = new System.Drawing.Font("微软雅黑", 18F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Pixel);
121             this.txtSearch.InputText = "";
122             this.txtSearch.InputType = HZH_Controls.TextInputType.NotControl;
123             this.txtSearch.IsFocusColor = true;
124             this.txtSearch.IsRadius = true;
125             this.txtSearch.IsShowClearBtn = true;
126             this.txtSearch.IsShowKeyboard = false;
127             this.txtSearch.IsShowRect = true;
128             this.txtSearch.IsShowSearchBtn = false;
129             this.txtSearch.KeyBoardType = HZH_Controls.Controls.KeyBoardType.UCKeyBorderAll_EN;
130             this.txtSearch.Location = new System.Drawing.Point(5, 5);
131             this.txtSearch.Margin = new System.Windows.Forms.Padding(4, 5, 4, 5);
132             this.txtSearch.MaxValue = new decimal(new int[] {
133             1000000,
134             0,
135             0,
136             0});
137             this.txtSearch.MinValue = new decimal(new int[] {
138             1000000,
139             0,
140             0,
141             -2147483648});
142             this.txtSearch.Name = "txtSearch";
143             this.txtSearch.Padding = new System.Windows.Forms.Padding(5);
144             this.txtSearch.PromptColor = System.Drawing.Color.Gray;
145             this.txtSearch.PromptFont = new System.Drawing.Font("微软雅黑", 15F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Pixel);
146             this.txtSearch.PromptText = "输入内容模糊搜索";
147             this.txtSearch.RectColor = System.Drawing.Color.FromArgb(((int)(((byte)(220)))), ((int)(((byte)(220)))), ((int)(((byte)(220)))));
148             this.txtSearch.RectWidth = 1;
149             this.txtSearch.RegexPattern = "";
150             this.txtSearch.Size = new System.Drawing.Size(437, 42);
151             this.txtSearch.TabIndex = 0;
152             // 
153             // ucSplitLine_V2
154             // 
155             this.ucSplitLine_V2.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(232)))), ((int)(((byte)(232)))), ((int)(((byte)(232)))));
156             this.ucSplitLine_V2.Dock = System.Windows.Forms.DockStyle.Right;
157             this.ucSplitLine_V2.Location = new System.Drawing.Point(448, 1);
158             this.ucSplitLine_V2.Name = "ucSplitLine_V2";
159             this.ucSplitLine_V2.Size = new System.Drawing.Size(1, 333);
160             this.ucSplitLine_V2.TabIndex = 3;
161             this.ucSplitLine_V2.TabStop = false;
162             // 
163             // ucSplitLine_V1
164             // 
165             this.ucSplitLine_V1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(232)))), ((int)(((byte)(232)))), ((int)(((byte)(232)))));
166             this.ucSplitLine_V1.Dock = System.Windows.Forms.DockStyle.Left;
167             this.ucSplitLine_V1.Location = new System.Drawing.Point(0, 1);
168             this.ucSplitLine_V1.Name = "ucSplitLine_V1";
169             this.ucSplitLine_V1.Size = new System.Drawing.Size(1, 333);
170             this.ucSplitLine_V1.TabIndex = 2;
171             this.ucSplitLine_V1.TabStop = false;
172             // 
173             // ucSplitLine_H2
174             // 
175             this.ucSplitLine_H2.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(232)))), ((int)(((byte)(232)))), ((int)(((byte)(232)))));
176             this.ucSplitLine_H2.Dock = System.Windows.Forms.DockStyle.Bottom;
177             this.ucSplitLine_H2.Location = new System.Drawing.Point(0, 334);
178             this.ucSplitLine_H2.Name = "ucSplitLine_H2";
179             this.ucSplitLine_H2.Size = new System.Drawing.Size(449, 1);
180             this.ucSplitLine_H2.TabIndex = 1;
181             this.ucSplitLine_H2.TabStop = false;
182             // 
183             // ucSplitLine_H1
184             // 
185             this.ucSplitLine_H1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(232)))), ((int)(((byte)(232)))), ((int)(((byte)(232)))));
186             this.ucSplitLine_H1.Dock = System.Windows.Forms.DockStyle.Top;
187             this.ucSplitLine_H1.Location = new System.Drawing.Point(0, 0);
188             this.ucSplitLine_H1.Name = "ucSplitLine_H1";
189             this.ucSplitLine_H1.Size = new System.Drawing.Size(449, 1);
190             this.ucSplitLine_H1.TabIndex = 0;
191             this.ucSplitLine_H1.TabStop = false;
192             // 
193             // UCComboxGridPanel
194             // 
195             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
196             this.BackColor = System.Drawing.Color.White;
197             this.Controls.Add(this.panel1);
198             this.Controls.Add(this.ucSplitLine_V2);
199             this.Controls.Add(this.ucSplitLine_V1);
200             this.Controls.Add(this.ucSplitLine_H2);
201             this.Controls.Add(this.ucSplitLine_H1);
202             this.Name = "UCComboxGridPanel";
203             this.Size = new System.Drawing.Size(449, 335);
204             this.Load += new System.EventHandler(this.UCComboxGridPanel_Load);
205             this.panel1.ResumeLayout(false);
206             this.ucControlBase1.ResumeLayout(false);
207             this.ResumeLayout(false);
208 
209         }
210 
211         #endregion
212 
213         private UCSplitLine_H ucSplitLine_H1;
214         private UCSplitLine_H ucSplitLine_H2;
215         private UCSplitLine_V ucSplitLine_V1;
216         private UCSplitLine_V ucSplitLine_V2;
217         private System.Windows.Forms.Panel panel1;
218         private UCControlBase ucControlBase1;
219         private UCDataGridView ucDataGridView1;
220         private System.Windows.Forms.Panel panel2;
221         private System.Windows.Forms.Timer timer1;
222         private UCTextBoxEx txtSearch;
223     }
224 }

View Code

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

 1  private Type m_rowType = typeof(UCDataGridViewRow);
 2 
 3         [Description("表格行类型"), Category("自定义")]
 4         public Type GridRowType
 5         {
 6             get { return m_rowType; }
 7             set
 8             {
 9                 m_rowType = value;
10             }
11         }
12         int intWidth = 0;
13 
14         private List<DataGridViewColumnEntity> m_columns = null;
15 
16         [Description("表格列"), Category("自定义")]
17         public List<DataGridViewColumnEntity> GridColumns
18         {
19             get { return m_columns; }
20             set
21             {
22                 m_columns = value;
23                 if (value != null)
24                     intWidth = value.Sum(p => p.WidthType == SizeType.Absolute ? p.Width : (p.Width < 80 ? 80 : p.Width));
25             }
26         }
27         private List<object> m_dataSource = null;
28 
29         [Description("表格数据源"), Category("自定义")]
30         public List<object> GridDataSource
31         {
32             get { return m_dataSource; }
33             set { m_dataSource = value; }
34         }
35 
36         private string m_textField;
37 
38         [Description("显示值字段名称"), Category("自定义")]
39         public string TextField
40         {
41             get { return m_textField; }
42             set
43             {
44                 m_textField = value;
45                 SetText();
46             }
47         }
48         [Obsolete("不再可用的属性")]
49         [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
50         private new ComboBoxStyle BoxStyle
51         {
52             get;
53             set;
54         }
55         private object selectSource = null;
56 
57         [Description("选中的数据源"), Category("自定义")]
58         public object SelectSource
59         {
60             get { return selectSource; }
61             set
62             {
63                 selectSource = value;
64                 SetText();
65                 if (SelectedChangedEvent != null)
66                 {
67                     SelectedChangedEvent(value, null);
68                 }
69             }
70         }
71 
72  [Description("选中数据源改变事件"), Category("自定义")]
73         public new event EventHandler SelectedChangedEvent;

重写点击事件来处理弹出

 1  protected override void click_MouseDown(object sender, MouseEventArgs e)
 2         {
 3             if (m_columns == null || m_columns.Count <= 0)
 4                 return;
 5             if (m_ucPanel == null)
 6             {
 7                 var p = this.Parent.PointToScreen(this.Location);
 8                 int intScreenHeight = Screen.PrimaryScreen.Bounds.Height;
 9                 int intHeight = Math.Max(p.Y, intScreenHeight - p.Y - this.Height);
10                 intHeight -= 100;
11                 m_ucPanel = new UCComboxGridPanel();
12                 m_ucPanel.ItemClick += m_ucPanel_ItemClick;
13                 m_ucPanel.Height = intHeight;
14                 m_ucPanel.Width = intWidth;
15                 m_ucPanel.Columns = m_columns;
16                 m_ucPanel.RowType = m_rowType;
17                 if (m_dataSource != null && m_dataSource.Count > 0)
18                 {
19                     int _intHeight = Math.Min(110 + m_dataSource.Count * 36, m_ucPanel.Height);
20                     m_ucPanel.Height = _intHeight;
21                 }
22             }
23             m_ucPanel.DataSource = m_dataSource;
24             if (_frmAnchor == null || _frmAnchor.IsDisposed || _frmAnchor.Visible == false)
25             {
26                 _frmAnchor = new Forms.FrmAnchor(this, m_ucPanel);
27                 _frmAnchor.Show(this.FindForm());
28             }
29 
30         }
31 
32         void m_ucPanel_ItemClick(object sender, DataGridViewEventArgs e)
33         {
34             _frmAnchor.Hide();
35             SelectSource = sender;
36         }
37 
38         private void SetText()
39         {
40             if (!string.IsNullOrEmpty(m_textField) && selectSource != null)
41             {
42                 var pro = selectSource.GetType().GetProperty(m_textField);
43                 if (pro != null)
44                 {
45                     TextValue = pro.GetValue(selectSource, null).ToStringExt();
46                 }
47             }
48         }

完整代码

  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Drawing;
  5 using System.Data;
  6 using System.Linq;
  7 using System.Text;
  8 using System.Windows.Forms;
  9 using HZH_Controls.Controls;
 10 
 11 namespace HZH_Controls.Controls.ComboBox
 12 {
 13     public partial class UCComboxGrid : UCCombox
 14     {
 15 
 16         private Type m_rowType = typeof(UCDataGridViewRow);
 17 
 18         [Description("表格行类型"), Category("自定义")]
 19         public Type GridRowType
 20         {
 21             get { return m_rowType; }
 22             set
 23             {
 24                 m_rowType = value;
 25             }
 26         }
 27         int intWidth = 0;
 28 
 29         private List<DataGridViewColumnEntity> m_columns = null;
 30 
 31         [Description("表格列"), Category("自定义")]
 32         public List<DataGridViewColumnEntity> GridColumns
 33         {
 34             get { return m_columns; }
 35             set
 36             {
 37                 m_columns = value;
 38                 if (value != null)
 39                     intWidth = value.Sum(p => p.WidthType == SizeType.Absolute ? p.Width : (p.Width < 80 ? 80 : p.Width));
 40             }
 41         }
 42         private List<object> m_dataSource = null;
 43 
 44         [Description("表格数据源"), Category("自定义")]
 45         public List<object> GridDataSource
 46         {
 47             get { return m_dataSource; }
 48             set { m_dataSource = value; }
 49         }
 50 
 51         private string m_textField;
 52 
 53         [Description("显示值字段名称"), Category("自定义")]
 54         public string TextField
 55         {
 56             get { return m_textField; }
 57             set
 58             {
 59                 m_textField = value;
 60                 SetText();
 61             }
 62         }
 63         [Obsolete("不再可用的属性")]
 64         [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
 65         private new ComboBoxStyle BoxStyle
 66         {
 67             get;
 68             set;
 69         }
 70         private object selectSource = null;
 71 
 72         [Description("选中的数据源"), Category("自定义")]
 73         public object SelectSource
 74         {
 75             get { return selectSource; }
 76             set
 77             {
 78                 selectSource = value;
 79                 SetText();
 80                 if (SelectedChangedEvent != null)
 81                 {
 82                     SelectedChangedEvent(value, null);
 83                 }
 84             }
 85         }
 86 
 87       
 88 
 89         [Description("选中数据源改变事件"), Category("自定义")]
 90         public new event EventHandler SelectedChangedEvent;
 91         public UCComboxGrid()
 92         {
 93             InitializeComponent();
 94         }
 95         UCComboxGridPanel m_ucPanel = null;
 96         Forms.FrmAnchor _frmAnchor;
 97         protected override void click_MouseDown(object sender, MouseEventArgs e)
 98         {
 99             if (m_columns == null || m_columns.Count <= 0)
100                 return;
101             if (m_ucPanel == null)
102             {
103                 var p = this.Parent.PointToScreen(this.Location);
104                 int intScreenHeight = Screen.PrimaryScreen.Bounds.Height;
105                 int intHeight = Math.Max(p.Y, intScreenHeight - p.Y - this.Height);
106                 intHeight -= 100;
107                 m_ucPanel = new UCComboxGridPanel();
108                 m_ucPanel.ItemClick += m_ucPanel_ItemClick;
109                 m_ucPanel.Height = intHeight;
110                 m_ucPanel.Width = intWidth;
111                 m_ucPanel.Columns = m_columns;
112                 m_ucPanel.RowType = m_rowType;
113                 if (m_dataSource != null && m_dataSource.Count > 0)
114                 {
115                     int _intHeight = Math.Min(110 + m_dataSource.Count * 36, m_ucPanel.Height);
116                     m_ucPanel.Height = _intHeight;
117                 }
118             }
119             m_ucPanel.DataSource = m_dataSource;
120             if (_frmAnchor == null || _frmAnchor.IsDisposed || _frmAnchor.Visible == false)
121             {
122                 _frmAnchor = new Forms.FrmAnchor(this, m_ucPanel);
123                 _frmAnchor.Show(this.FindForm());
124             }
125 
126         }
127 
128         void m_ucPanel_ItemClick(object sender, DataGridViewEventArgs e)
129         {
130             _frmAnchor.Hide();
131             SelectSource = sender;
132         }
133 
134         private void SetText()
135         {
136             if (!string.IsNullOrEmpty(m_textField) && selectSource != null)
137             {
138                 var pro = selectSource.GetType().GetProperty(m_textField);
139                 if (pro != null)
140                 {
141                     TextValue = pro.GetValue(selectSource, null).ToStringExt();
142                 }
143             }
144         }
145     }
146 }

View Code

 1 namespace HZH_Controls.Controls.ComboBox
 2 {
 3     partial class UCComboxGrid
 4     {
 5         /// <summary> 
 6         /// 必需的设计器变量。
 7         /// </summary>
 8         private System.ComponentModel.IContainer components = null;
 9 
10         /// <summary> 
11         /// 清理所有正在使用的资源。
12         /// </summary>
13         /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
14         protected override void Dispose(bool disposing)
15         {
16             if (disposing && (components != null))
17             {
18                 components.Dispose();
19             }
20             base.Dispose(disposing);
21         }
22 
23         #region 组件设计器生成的代码
24 
25         /// <summary> 
26         /// 设计器支持所需的方法 - 不要
27         /// 使用代码编辑器修改此方法的内容。
28         /// </summary>
29         private void InitializeComponent()
30         {
31             this.SuspendLayout();
32             // 
33             // txtInput
34             // 
35             this.txtInput.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(240)))), ((int)(((byte)(240)))), ((int)(((byte)(240)))));
36             // 
37             // UCComboxGrid
38             // 
39             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
40             this.BackColor = System.Drawing.Color.Transparent;
41             this.BoxStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
42             this.FillColor = System.Drawing.Color.FromArgb(((int)(((byte)(240)))), ((int)(((byte)(240)))), ((int)(((byte)(240)))));
43             this.Name = "UCComboxGrid";
44             this.RectColor = System.Drawing.Color.FromArgb(((int)(((byte)(240)))), ((int)(((byte)(240)))), ((int)(((byte)(240)))));
45             this.ResumeLayout(false);
46             this.PerformLayout();
47 
48         }
49 
50         #endregion
51 
52     }
53 }

View Code

以上就是全部东西了

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原文地址：https://www.cnblogs.com/bfyx/p/11425464.html

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

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