1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
| public class DataPointConverter : ExpandableObjectConverter
{
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
{
if (destinationType == typeof(DataPoint))
return true;
return base.CanConvertTo(context, destinationType);
}
public override object ConvertTo(ITypeDescriptorContext context,
System.Globalization.CultureInfo culture,
object value,
Type destinationType)
{
if (destinationType == typeof(System.String) &&
value is DataPoint)
{
return ((DataPoint)value).X.ToString()+"; "+((DataPoint)value).Y.ToString();
}
return base.ConvertTo(context, culture, value, destinationType);
}
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
{
if (sourceType == typeof(System.String))
return true;
return base.CanConvertFrom(context, sourceType);
}
public override object ConvertFrom(ITypeDescriptorContext context,
System.Globalization.CultureInfo culture,
object value)
{
if (value is string)
{
try{
string s = (string)value;
string[] parts = s.Split(new char[] {';'});
DataPoint dp = new DataPoint();
dp.X = Double.Parse(parts[0].Trim());
dp.Y = Double.Parse(parts[1].Trim());
return dp;
}
catch
{
throw new ArgumentException("Cannot convert!");
}
}
return base.ConvertFrom(context, culture, value);
}
} |