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fix bug in TryParse - needed to specify MakeByRefType(), pass through the return value from the array

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Michael Becker 2020-12-04 23:42:30 -05:00
parent c507fe4f83
commit 080a5c0f2d
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GPG Key ID: 506F54899E2BFED7
1 changed files with 12 additions and 2 deletions
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14
MBS.Framework/StringExtensions.cs
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@ -55,6 +55,13 @@ namespace MBS.Framework
return (T)Parse(value, typeof(T)); return (T)Parse(value, typeof(T));
} }
public static T TryParse<T>(this string value, T defaultValue = default(T))
{
if (TryParse(value, typeof(T), out object output))
return (T)output;
return defaultValue;
}
/// <summary> /// <summary>
/// Parses the given <paramref name="value" /> with the specified <paramref name="type" />'s public static Parse(<see cref="String" />) method. If no such method exists, /// Parses the given <paramref name="value" /> with the specified <paramref name="type" />'s public static Parse(<see cref="String" />) method. If no such method exists,
@ -67,6 +74,7 @@ namespace MBS.Framework
{ {
return TryParse(value, type, value, out output); return TryParse(value, type, value, out output);
} }
/// <summary> /// <summary>
/// Parses the given <paramref name="value" /> with the specified <paramref name="type" />'s public static Parse(<see cref="String" />) method. If no such method exists, /// Parses the given <paramref name="value" /> with the specified <paramref name="type" />'s public static Parse(<see cref="String" />) method. If no such method exists,
/// returns <paramref name="defaultValue" />. /// returns <paramref name="defaultValue" />.
@ -77,12 +85,14 @@ namespace MBS.Framework
/// <param name="defaultValue">Default value.</param> /// <param name="defaultValue">Default value.</param>
public static bool TryParse(this string value, Type type, object defaultValue, out object output) public static bool TryParse(this string value, Type type, object defaultValue, out object output)
{ {
System.Reflection.MethodInfo miParse = type.GetMethod("TryParse", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static, null, System.Reflection.CallingConventions.Any, new Type[] { typeof(string), type }, null); System.Reflection.MethodInfo miParse = type.GetMethod("TryParse", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static, null, new Type[] { typeof(string), type.MakeByRefType() }, null);
if (miParse != null) if (miParse != null)
{ {
// the given type implements a public static Parse(String) method, so use it // the given type implements a public static Parse(String) method, so use it
object retval = null; object retval = null;
bool ret = (bool)miParse.Invoke(null, new object[] { value, retval }); object[] parms = new object[] { value, retval };
bool ret = (bool)miParse.Invoke(null, parms);
retval = parms[1];
if (ret) if (ret)
{ {
output = retval; output = retval;