Dot Net WinForm 控件开发 (六) 为属性提供弹出式编辑对话框

１、先画出弹出对话框的windows窗体


代码如下：

 1 using  System;
 2 using  System.Collections.Generic;
 3 using  System.ComponentModel;
 4 using  System.Data;
 5 using  System.Drawing;
 6 using  System.Text;
 7 using  System.Windows.Forms;
 8
 9 namespace  CustomControlSample
10 {
11    public partial class FrmSimpleCustomTypeDialogEditor : Form
12    {
13        private SimpleCustomType _simpleCustomType;
14
15        public SimpleCustomType SimpleCustomTypeProperty
16        {
17            get { return _simpleCustomType; }
18            set { _simpleCustomType = value; }
19        }
20
21
22        public FrmSimpleCustomTypeDialogEditor(SimpleCustomType sct)
23        {
24            InitializeComponent();
25            this._simpleCustomType = sct;
26            this.textBox1.Text = sct.Min.ToString();
27            this.textBox2.Text = sct.Max.ToString();
28        }
29
30        private void button1_Click(object sender, EventArgs e)
31        {
32            this.DialogResult = DialogResult.OK;
33            this._simpleCustomType.Min = int.Parse(this.textBox1.Text);
34            this._simpleCustomType.Max = int.Parse(this.textBox2.Text);
35            this.Close(); //　这句随便写不写？！！
36        }
37
38        private void button2_Click(object sender, EventArgs e)
39        {
40            this.Close();
41        }
42
43        private void textBox1_Validating(object sender, CancelEventArgs e)
44        {
45            try
46            {
47                int.Parse(textBox1.Text);
48            }
49            catch (FormatException)
50            {
51                e.Cancel = true;
52                MessageBox.Show("无效的值。", "验证错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
53            }
54        }
55
56        private void textBox2_Validating(object sender, CancelEventArgs e)
57        {
58            try
59            {
60                int.Parse(textBox2.Text);
61            }
62            catch (FormatException)
63            {
64                e.Cancel = true;
65                MessageBox.Show("无效的值。", "验证错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
66            }
67        }
68
69    }
70}

2、再编写属性值编辑器类

 1 SimpleCustomTypeDialogEdit #region SimpleCustomTypeDialogEdit
 2    /**//// <summary>
 3    /// SimpleCustomType 值编辑器 for Modal
 4    /// </summary>
 5    public class SimpleCustomTypeDialogEditor : UITypeEditor
 6    {
 7        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
 8        {
 9            if (context != null && context.Instance != null)
10            {
11                return UITypeEditorEditStyle.Modal;
12            }
13            return base.GetEditStyle(context);
14        }
15
16        public override object EditValue(ITypeDescriptorContext context, System.IServiceProvider provider, object value)
17        {
18            System.Windows.Forms.Design.IWindowsFormsEditorService editorService = null;
19            if (context != null && context.Instance != null && provider != null)
20            {
21                editorService = (System.Windows.Forms.Design.IWindowsFormsEditorService)provider.GetService(typeof(System.Windows.Forms.Design.IWindowsFormsEditorService));
22                if (editorService != null)
23                {
24                    CustomControl control = (CustomControl)context.Instance;
25                    FrmSimpleCustomTypeDialogEditor dlg = new FrmSimpleCustomTypeDialogEditor(control.DialogProperty);
26                    if (dlg.ShowDialog() == DialogResult.OK)
27                    {
28                        value = dlg.SimpleCustomTypeProperty;
29                        return value;
30                    }
31                }
32            }
33
34            return value;
35        }
36    }
37    #endregion

3、再添加一个属性，并用EditorAttribute 指定相应的编辑器类

 1 弹出属性值编辑对话框的属性 #region 弹出属性值编辑对话框的属性
 2        // 注意：这里设置了复杂属性的初始值 new SimpleCustomType(1, 2)
 3        private SimpleCustomType dialogField = new SimpleCustomType(1, 2);
 4
 5        [Category("弹出式属性值编辑对话框")]
 6        [TypeConverter(typeof(SimpleCustomTypeConverter))]
 7        [Editor(typeof(SimpleCustomTypeDialogEditor), typeof(UITypeEditor))]
 8        public SimpleCustomType DialogProperty
 9        {
10            get { return dialogField; }
11            set { dialogField = value; }
12        }
13        #endregion

The end.