Question

在将项目更新到.net核心（从完整的.net）之前，我已经习惯了这样做，并且操作beetwen两个表达式：

public class ExpressionBuilder<T>
{
    private Expression<Func<T, bool>> _mainExpression;

    public ExpressionBuilder()
    {
        _mainExpression = e => true;
    }

    public void AddExpression(Expression<Func<T, bool>> expression)
    {
        _mainExpression = _mainExpression.And(expression);
    }

    public Expression<Func<T, bool>> Build()
    {
        return _mainExpression;
    }
}

现在变量_mainExpression没有实现的方法And。我该怎么做才能合并两个表达式？

Answer 1

试试这个：

WARNING in ./main.js from UglifyJs
Condition always true [./d3.v3.min.js:5,23414]
Condition always true [./dataTables.bootstrap.min.js:5,13]
Condition always true [./jquery.dataTables.min.js:5,13]

ERROR in ./jquery.dataTables.min.js
Module not found: Error: Cannot resolve module 'jquery' in /myapp/app/js
 @ ./jquery.dataTables.min.js 5:52-111

ERROR in ./dataTables.bootstrap.min.js
Module not found: Error: Cannot resolve module 'jquery' in /myapp/app/js
 @ ./dataTables.bootstrap.min.js 5:52-128

ERROR in ./dataTables.bootstrap.min.js
Module not found: Error: Cannot resolve module 'datatables.net' in /myapp/app/js
 @ ./dataTables.bootstrap.min.js 5:52-128

另请查看this。

如何在.net核心中合并表达式

1 个答案: