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using System;
using System.Globalization;
namespace Xamarin.Forms
{
public class GridLengthTypeConverter : TypeConverter
{
public override object ConvertFromInvariantString(string value)
{
if (value == null)
return null;
double length;
value = value.Trim();
if (string.Compare(value, "auto", StringComparison.OrdinalIgnoreCase) == 0)
return GridLength.Auto;
if (string.Compare(value, "*", StringComparison.OrdinalIgnoreCase) == 0)
return new GridLength(1, GridUnitType.Star);
if (value.EndsWith("*", StringComparison.Ordinal) && double.TryParse(value.Substring(0, value.Length - 1), NumberStyles.Number, CultureInfo.InvariantCulture, out length))
return new GridLength(length, GridUnitType.Star);
if (double.TryParse(value, NumberStyles.Number, CultureInfo.InvariantCulture, out length))
return new GridLength(length);
throw new FormatException();
}
}
}
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