public static Expression ParseToBody(Expression expression, ParameterExpression p)
{
MapExpressionVisitor mapExpressionVisitor = new MapExpressionVisitor();
mapExpressionVisitor._p = p;
return(mapExpressionVisitor.Visit(expression));
}
public static Expression ParseToBody(Expression expression)
{
MapExpressionVisitor mapExpressionVisitor = new MapExpressionVisitor();
mapExpressionVisitor._type = null;
return(mapExpressionVisitor.Visit(expression));
}
/// <summary>
/// 定义规则
/// </summary>
/// <typeparam name="TValue"></typeparam>
/// <param name="tOut">返回<see cref="TOut"/> 属性或字段</param>
/// <param name="from">用于生成<see cref="TOut"/>列的规则 </param>
/// <returns></returns>
public Map <TIn, TOut> DefineRule <TValue>(Expression <Func <TOut, TValue> > tOut, Expression <Func <TIn, TValue> > from)
{
var name = tOut.GetPropertyOrFieldName();
//不同的处理结果处理
if (!_dict_rule.ContainsKey(name))
{
_dict_rule.Add(name, MapExpressionVisitor.ParseToBody(from, _parameterExpression));
}
else
{
if (_dict_rule.Remove(name))
{
_dict_rule.Add(name, MapExpressionVisitor.ParseToBody(from, _parameterExpression));
}
}
return(this);
}