|
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Globalization;
using System.Text;
using System.Windows;
namespace Pfz.WpfControls.TypeConverters
{
/// <summary>
/// Class that strings into GridLengths.
/// </summary>
public sealed class ObservableLengthsConverter:
TypeConverter
{
private static readonly GridLengthConverter _converter = new GridLengthConverter();
/// <summary>
/// Returns true for string.
/// </summary>
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
{
return sourceType == typeof(string);
}
/// <summary>
/// Returns true for string.
/// </summary>
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
{
return destinationType == typeof(string);
}
/// <summary>
/// Convert from string.
/// </summary>
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
string stringValue = value as string;
if (stringValue == null)
return null;
var resultArray = FromString(stringValue);
return new ObservableCollection<GridLength>(resultArray);
}
/// <summary>
/// Convert to string.
/// </summary>
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType != typeof(string))
throw new ArgumentException("The only conversion supported is to string.", "destinationType");
var enumerable = (IEnumerable<GridLength>)value;
return ToString(enumerable);
}
/// <summary>
/// Converts a string into an array of GridLengths.
/// </summary>
public static GridLength[] FromString(string lengths)
{
string[] split = lengths.Split(',');
int length = split.Length;
if (length == 0)
return null;
var result = new GridLength[length];
for(int i=0; i<length; i++)
{
string trimmed = split[i].Trim();
result[i] = (GridLength)_converter.ConvertFrom(trimmed);
}
return result;
}
/// <summary>
/// Converts a collection of GridLengths to a string separated by comma.
/// </summary>
public static string ToString(IEnumerable<GridLength> lengths)
{
StringBuilder result = new StringBuilder();
foreach(var length in lengths)
{
result.Append(length.ToString());
result.Append(',');
}
if (result.Length == 0)
return null;
result.Length--;
return result.ToString();
}
}
}
|
By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.
If a file you wish to view isn't highlighted, and is a text file (not binary), please
let us know and we'll add colourisation support for it.
I started to program computers when I was 11 years old, as a hobbyist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.
At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do their work easier, faster and with less errors.
Want more info or simply want to contact me?
Take a look at:
http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com
Codeproject MVP 2012, 2015 & 2016
Microsoft MVP 2013-2014 (in October 2014 I started working at Microsoft, so I can't be a Microsoft MVP anymore).