public NumberParser(Type fieldType)
{
if (fieldType == typeof(int))
{
parseFunction = (string input, out object value) => { int parsedVal; bool result = int.TryParse(input, out parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (int)value1 == (int)value2;
}
else if (fieldType == typeof(uint))
{
parseFunction = (string input, out object value) => { uint parsedVal; bool result = uint.TryParse(input, out parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (uint)value1 == (uint)value2;
}
else if (fieldType == typeof(long))
{
parseFunction = (string input, out object value) => { long parsedVal; bool result = long.TryParse(input, out parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (long)value1 == (long)value2;
}
else if (fieldType == typeof(ulong))
{
parseFunction = (string input, out object value) => { ulong parsedVal; bool result = ulong.TryParse(input, out parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (ulong)value1 == (ulong)value2;
}
else if (fieldType == typeof(byte))
{
parseFunction = (string input, out object value) => { byte parsedVal; bool result = byte.TryParse(input, out parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (byte)value1 == (byte)value2;
}
else if (fieldType == typeof(sbyte))
{
parseFunction = (string input, out object value) => { sbyte parsedVal; bool result = sbyte.TryParse(input, out parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (sbyte)value1 == (sbyte)value2;
}
else if (fieldType == typeof(short))
{
parseFunction = (string input, out object value) => { short parsedVal; bool result = short.TryParse(input, out parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (short)value1 == (short)value2;
}
else if (fieldType == typeof(ushort))
{
parseFunction = (string input, out object value) => { ushort parsedVal; bool result = ushort.TryParse(input, out parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (ushort)value1 == (ushort)value2;
}
else if (fieldType == typeof(char))
{
parseFunction = (string input, out object value) => { char parsedVal; bool result = char.TryParse(input, out parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (char)value1 == (char)value2;
}
else
{
parseFunction = null;
equalsFunction = null;
}
}
static Inner()
{
if (typeof(IEquatable <T>).IsAssignableFrom(typeof(T)))
{
var _equals = typeof(IEquatable <T>).GetMethod(nameof(IEquatable <T> .Equals), new[] { typeof(T) });
if (_equals != null)
{
var x = Expression.Parameter(typeof(T).MakeByRefType());
var y = Expression.Parameter(typeof(T).MakeByRefType());
equals = Expression.Lambda <EqualsFunc>(Expression.Call(x, _equals, y), x, y).Compile();
}
}
if (equals == null)
{
equals = (ref T x, ref T y) => x.Equals(y);
}
}
public NumberParser(Type fieldType)
{
if (fieldType == typeof(float))
{
parseFunction = (string input, out object value) => { float parsedVal; bool result = float.TryParse(input, out parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (float)value1 == (float)value2;
}
else if (fieldType == typeof(double))
{
parseFunction = (string input, out object value) => { double parsedVal; bool result = double.TryParse(input, out parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (double)value1 == (double)value2;
}
else if (fieldType == typeof(decimal))
{
parseFunction = (string input, out object value) => { decimal parsedVal; bool result = decimal.TryParse(input, out parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (decimal)value1 == (decimal)value2;
}
else
{
parseFunction = null;
equalsFunction = null;
}
}
/// <summary>
/// 定义比较函数
/// </summary>
/// <param name="equalFunc">Equals的实现函数</param>
/// <param name="gethashCode">GetHashCode的实现函数</param>
public CustomEqualityComparer(EqualsFunc <T> equalFunc, GetHashCodeDelgate <T> gethashCode)
{
_equalFunc = equalFunc;
_gethashCode = gethashCode;
}
/// <summary>
/// 定义比较函数
/// </summary>
/// <param name="equalFunc">Equals的实现函数</param>
public CustomEqualityComparer(EqualsFunc <T> equalFunc)
: this(equalFunc, null)
{
}
public NumberParser(Type fieldType)
{
// 整型
if (fieldType == typeof(int))
{
parseFunction = (string input, out object value) => { bool result = int.TryParse(input, out int parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (int)value1 == (int)value2;
}
else if (fieldType == typeof(uint))
{
parseFunction = (string input, out object value) => { bool result = uint.TryParse(input, out uint parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (uint)value1 == (uint)value2;
}
else if (fieldType == typeof(long))
{
parseFunction = (string input, out object value) => { bool result = long.TryParse(input, out long parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (long)value1 == (long)value2;
}
else if (fieldType == typeof(ulong))
{
parseFunction = (string input, out object value) => { bool result = ulong.TryParse(input, out ulong parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (ulong)value1 == (ulong)value2;
}
else if (fieldType == typeof(byte))
{
parseFunction = (string input, out object value) => { bool result = byte.TryParse(input, out byte parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (byte)value1 == (byte)value2;
}
else if (fieldType == typeof(sbyte))
{
parseFunction = (string input, out object value) => { bool result = sbyte.TryParse(input, out sbyte parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (sbyte)value1 == (sbyte)value2;
}
else if (fieldType == typeof(short))
{
parseFunction = (string input, out object value) => { bool result = short.TryParse(input, out short parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (short)value1 == (short)value2;
}
else if (fieldType == typeof(ushort))
{
parseFunction = (string input, out object value) => { bool result = ushort.TryParse(input, out ushort parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (ushort)value1 == (ushort)value2;
}
else if (fieldType == typeof(char))
{
parseFunction = (string input, out object value) => { bool result = char.TryParse(input, out char parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (char)value1 == (char)value2;
}
// 浮点型
else if (fieldType == typeof(float))
{
parseFunction = (string input, out object value) => { bool result = float.TryParse(input, out float parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (float)value1 == (float)value2;
}
else if (fieldType == typeof(double))
{
parseFunction = (string input, out object value) => { bool result = double.TryParse(input, out double parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (double)value1 == (double)value2;
}
else if (fieldType == typeof(decimal))
{
parseFunction = (string input, out object value) => { bool result = decimal.TryParse(input, out decimal parsedVal); value = parsedVal; return(result); };
equalsFunction = (object value1, object value2) => (decimal)value1 == (decimal)value2;
}
else
{
throw new Exception("Type必须是数字类型");
}
}