// Preferred way: works with nullable types! (but a null value returns false)
public static bool IsNumeric(object o) => o is byte || o is sbyte || o is ushort || o is uint || o is ulong || o is short || o is int || o is long || o is float || o is double || o is decimal;
// Preferred way: works with nullable types! (but a null value returns false)
public static bool IsNumeric(object o) => o is byte || o is sbyte || o is ushort || o is uint || o is ulong || o is short || o is int || o is long || o is float || o is double || o is decimal;
// Preferred way: works with nullable types! (but a null value returns false) public static bool IsNumeric(object o) => o is byte || o is sbyte || o is ushort || o is uint || o is ulong || o is short || o is int || o is long || o is float || o is double || o is decimal;
// Another way based on a type instead (not preferred in most cases)
public static bool IsNumeric(Type type)
{
switch (Type.GetTypeCode(type))
{
case TypeCode.Byte:
case TypeCode.SByte:
case TypeCode.UInt16:
case TypeCode.UInt32:
case TypeCode.UInt64:
case TypeCode.Int16:
case TypeCode.Int32:
case TypeCode.Int64:
case TypeCode.Decimal:
case TypeCode.Double:
case TypeCode.Single:
return true;
case TypeCode.Object:
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>))
{
return IsNumeric(Nullable.GetUnderlyingType(type));
}
return false;
default:
return false;
}
}
// Another way based on a type instead (not preferred in most cases)
public static bool IsNumeric(Type type)
{
switch (Type.GetTypeCode(type))
{
case TypeCode.Byte:
case TypeCode.SByte:
case TypeCode.UInt16:
case TypeCode.UInt32:
case TypeCode.UInt64:
case TypeCode.Int16:
case TypeCode.Int32:
case TypeCode.Int64:
case TypeCode.Decimal:
case TypeCode.Double:
case TypeCode.Single:
return true;
case TypeCode.Object:
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>))
{
return IsNumeric(Nullable.GetUnderlyingType(type));
}
return false;
default:
return false;
}
}
// Another way based on a type instead (not preferred in most cases)
public static bool IsNumeric(Type type)
{
switch (Type.GetTypeCode(type))
{
case TypeCode.Byte:
case TypeCode.SByte:
case TypeCode.UInt16:
case TypeCode.UInt32:
case TypeCode.UInt64:
case TypeCode.Int16:
case TypeCode.Int32:
case TypeCode.Int64:
case TypeCode.Decimal:
case TypeCode.Double:
case TypeCode.Single:
return true;
case TypeCode.Object:
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>))
{
return IsNumeric(Nullable.GetUnderlyingType(type));
}
return false;
default:
return false;
}
}
bool IsStringOrNumericType(Type type){// Haal het onderliggende type op als het een nullable type is.Type underlyingType = Nullable.GetUnderlyingType(type) ?? type;// Controleer of het onderliggende type een string of numeriek type is.return underlyingType == typeof(string) ||underlyingType == typeof(byte) || underlyingType == typeof(sbyte) ||underlyingType == typeof(short) || underlyingType == typeof(ushort) ||underlyingType == typeof(int) || underlyingType == typeof(uint) ||underlyingType == typeof(long) || underlyingType == typeof(ulong) ||underlyingType == typeof(float) || underlyingType == typeof(double) ||underlyingType == typeof(decimal);}
270900cookie-checkC# IsNumeric