当前文件路径：HeroBeastControlsNavMenu/NavMenu/Converter/NavMenuItemConverter.cs

		            
 1using System;
 2using System.Collections.Generic;
 3using System.ComponentModel;
 4using System.Text;
 5using System.Web;
 6using System.Web.UI;
 7using System.Web.UI.WebControls;
 8using System.Globalization;
 9
10namespace HeroBeastControls.NavMenu
11...{
12    /**//// <summary>
13    /// NavMenuItem类型转换器
14    /// </summary>
15    public class NavMenuItemConverter : ExpandableObjectConverter
16    ...{
17        方法#region 方法
18
19        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
20        ...{
21            if (sourceType == typeof(string))
22            ...{
23                return true;
24            }
25            return base.CanConvertFrom(context, sourceType);
26        }
27
28        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
29        ...{
30            if (destinationType == typeof(string))
31            ...{
32                return true;
33            }
34            return base.CanConvertTo(context, destinationType);
35        }
36
37        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture,
38            object value)
39        ...{
40            if (value == null)
41            ...{
42                return new NavMenuItem();
43            }
44            if (value is string)
45            ...{
46                string s = (string)value;
47                if (s.Length == 0)
48                ...{
49                    return new NavMenuItem();
50                }
51                return "NavMenuItem";
52
53            }
54            return base.ConvertFrom(context, culture, value);
55        }
56
57        public override object ConvertTo(
58            ITypeDescriptorContext context,
59            CultureInfo culture, object value, Type destinationType)
60        ...{
61            if (value != null)
62            ...{
63                if (!(value is NavMenuItem))
64                ...{
65                    throw new ArgumentException(
66                        "Invalid NavMenuItem", "value");
67                }
68            }
69
70            if (destinationType == typeof(string))
71            ...{
72                if (value == null)
73                ...{
74                    return String.Empty;
75                }
76                return "NavMenuItem";
77            }
78            return base.ConvertTo(context, culture, value,
79                destinationType);
80        }
81        #endregion
82    }
83}
84