前两天分享了GridControl的自定义编辑器，今天再来分享一下整理出来的GridLookUpEdit的自定义编辑器。
本代码用的DevExpress版本号：17.2.6.0，旧的版本可能有些地方会有些微的变化。
该自定义编辑器需要用到上篇中定义的MyGridView（具体代码可在自定义GridControl编辑器一文中阅览），此控件包含了多列模糊查询功能，希望对使用或正在学习DevExpress的同学有所帮助。
后续有时间会陆续将一些比较实用的自定义编辑器分享出来。
1 using System;
2 using System.Collections.Generic;
3 using System.ComponentModel;
4 using System.Windows.Forms;
5 using Comteck.Dto;
6 using DevExpress.XtraEditors;
7 using DevExpress.XtraEditors.Controls;
8 using DevExpress.XtraEditors.Drawing;
9 using DevExpress.XtraEditors.Popup;
10 using DevExpress.XtraEditors.Registrator;
11 using DevExpress.XtraEditors.Repository;
12 using DevExpress.XtraEditors.ViewInfo;
13 using DevExpress.XtraGrid;
14 using DevExpress.XtraGrid.Views.Base;
15
16 namespace Comteck.Winforms.Controls {
17 /// <summary>
18 /// 自定义的GridLookupEdit,允许进行多列的匹配
19 /// <para>参照：https://www.devexpress.com/Support/Center/Example/Details/E1985 </para>
20 /// </summary>
21 [ToolboxItem(true)]
22 public class MyGridLookUpEdit : GridLookUpEdit {
23 /// <summary>
24 /// 自动注册下拉框编辑器
25 /// </summary>
26 static MyGridLookUpEdit() {
27 RepositoryItemMyGridLookUpEdit.RegisterCustomGridLookUpEdit();
28 }
29
30 /// <summary>
31 /// 创建自定义GridLookupEdit
32 /// </summary>
33 public MyGridLookUpEdit() : base() {
34 Initialize();
35 }
36
37 /// <summary>
38 /// 初始化
39 /// </summary>
40 private void Initialize() {
41 this.Tag = false; // 设置全选标记
42 this.Properties.AllowMouseWheel = false;
43 //this.EnterMoveNextControl = true;
44 this.Properties.ImmediatePopup = true;
45 this.Properties.TextEditStyle = TextEditStyles.Standard;
46
47 #region 编辑框默认自动全选
48
49 // 鼠标移入文本编辑框触发事件
50 this.Enter += (sender, e) => {
51 // 设置全选标记
52 this.Tag = true;
53 this.SelectAll();
54 };
55 // 获取输入焦点时自动全选
56 this.MouseUp += (sender, e) => {
57 // 如果鼠标左键操作并且标记存在，则执行全选
58 if (e.Button == MouseButtons.Left && (bool)this.Tag) {
59 this.SelectAll();
60 }
61
62 // 取消全选标记
63 this.Tag = false;
64 };
65 // 双击输入框时自动全选
66 this.DoubleClick += (sender, e) => {
67 this.SelectAll();
68 };
69
70 #endregion
71
72 this.KeyDown += this.MyGridLookUpEdit_KeyDown;
73 }
74
75 /// <summary>
76 ///
77 /// </summary>
78 /// <param name="sender"></param>
79 /// <param name="e"></param>
80 private void MyGridLookUpEdit_KeyDown(object sender, KeyEventArgs e) {
81 if (e.KeyCode == Keys.Delete) {
82 var control = sender as BaseEdit;
83 if (control.ReadOnly) { return; }
84 control.EditValue = null;
85 e.Handled = true;
86 } else if (e.KeyCode == Keys.Down) {
87 this.ShowPopup();
88
89 e.Handled = true;
90 } else if (e.KeyCode == Keys.Back) {
91 if (this.IsPopupOpen == false) {
92 this.ShowPopup();
93
94 e.Handled = true;
95 }
96 }
97 }
98
99 /// <summary>
100 /// 自定义编辑器名称
101 /// </summary>
102 public override string EditorTypeName => RepositoryItemMyGridLookUpEdit.MyGridLookUpEditName;
103
104 /// <summary>
105 /// 重写下拉框编辑器
106 /// </summary>
107 [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
108 public new RepositoryItemMyGridLookUpEdit Properties => base.Properties as RepositoryItemMyGridLookUpEdit;
109
110 //
111 // 摘要:
112 // Gets or sets whether focus is moved to the next control (according to the tab
113 // order) when an end-user presses ENTER.
114 [DefaultValue(true)]
115 [DXCategory("Behavior")]
116 public override bool EnterMoveNextControl { get; set; } = true;
117
118 /// <summary>
119 ///
120 /// </summary>
121 /// <returns></returns>
122 protected override PopupBaseForm CreatePopupForm() {
123 return new MyGridLookUpPopupForm(this);
124 }
125
126 /// <summary>
127 ///
128 /// </summary>
129 /// <param name="e"></param>
130 /// <returns></returns>
131 public override bool IsNeededKey(KeyEventArgs e) {
132 return this.Properties.IsNeededKey(e.KeyData);
133 }
134
135 /// <summary>
136 /// 正常情况下，在输入第一个字符（主要是数字及字母）后，虽然自动弹出了下拉框并过滤了数据，
137 /// 但是此时光标并未定位到下拉框中，导致回车后并未返回匹配到的首行记录
138 /// 此处就是为了解决以上问题，展开下拉框时自动定位到首行
139 /// </summary>
140 protected override void OnPopupShown() {
141 base.OnPopupShown();
142
143 BeginInvoke(new Action(() => {
144 if (this.GetSelectedDataRow() == null) {
145 this.Properties.View.FocusedRowHandle = 0;
146 }
147 }));
148 }
149 }
150
151 /// <summary>
152 /// 匹配自定义编辑器的下拉GridLookUpEdit
153 /// </summary>
154 [DXCategory("Properties")]
155 [UserRepositoryItem("RegisterMyGridLookUpEdit")]
156 public class RepositoryItemMyGridLookUpEdit : RepositoryItemGridLookUpEdit {
157 /// <summary>
158 /// 编辑器的名称
159 /// </summary>
160 public const string MyGridLookUpEditName = "MyGridLookUpEdit";
161
162 /// <summary>
163 /// 注册编辑器
164 /// </summary>
165 static RepositoryItemMyGridLookUpEdit() {
166 RegisterCustomGridLookUpEdit();
167 }
168
169 /// <summary>
170 /// 创建自定义的编辑器
171 /// </summary>
172 public RepositoryItemMyGridLookUpEdit() {
173 // 不允许自动完成
174 base.AutoComplete = false;
175 }
176
177 /// <summary>
178 /// 编辑器名称
179 /// </summary>
180 public override string EditorTypeName => MyGridLookUpEditName;
181
182 /// <summary>
183 /// 注册编辑器
184 /// </summary>
185 public static void RegisterCustomGridLookUpEdit() {
186 EditorRegistrationInfo.Default.Editors.Add(
187 new EditorClassInfo(
188 MyGridLookUpEditName,
189 typeof(MyGridLookUpEdit),
190 typeof(RepositoryItemMyGridLookUpEdit),
191 typeof(GridLookUpEditBaseViewInfo),
192 new ButtonEditPainter(),
193 true));
194 }
195
196 /// <summary>
197 /// 创建自定义GridView
198 /// </summary>
199 /// <returns></returns>
200 protected override ColumnView CreateViewInstance() {
201 return new MyGridView();
202 }
203
204 /// <summary>
205 /// 创建自定义GridControl
206 /// </summary>
207 /// <returns></returns>
208 protected override GridControl CreateGrid() {
209 return new MyGridControl();
210 }
211 }
212
213 public class MyGridLookUpPopupForm : PopupGridLookUpEditForm
214 {
215 public MyGridLookUpPopupForm(GridLookUpEdit ownerEdit)
216 : base(ownerEdit) {
217 }
218
219 protected override void OnKeyDown(KeyEventArgs e) {
220 if (e.KeyCode == Keys.Tab) {
221 this.OwnerEdit.EditValue = QueryResultValue();
222 this.OwnerEdit.SendKey(e);
223 }
224
225 base.OnKeyDown(e);
226 }
227 }
228 }
原文地址：https://www.cnblogs.com/geping/p/10407689.html
时间： 2024-11-04 11:09:05