您可以通过动态创建传递给的lambda来做到这一点
Select:
Func<Data,Data> CreateNewStatement( string fields ){ // input parameter "o" var xParameter = expression.Parameter( typeof( Data ), "o" ); // new statement "new Data()" var xNew = expression.New( typeof( Data ) ); // create initializers var bindings = fields.Split( ',' ).Select( o => o.Trim() ) .Select( o => { // property "Field1" var mi = typeof( Data ).GetProperty( o ); // original value "o.Field1" var xOriginal = expression.Property( xParameter, mi ); // set value "Field1 = o.Field1" return expression.Bind( mi, xOriginal ); } ); // initialization "new Data { Field1 = o.Field1, Field2 = o.Field2 }" var xInit = expression.MemberInit( xNew, bindings ); // expression "o => new Data { Field1 = o.Field1, Field2 = o.Field2 }" var lambda = expression.Lambda<Func<Data,Data>>( xInit, xParameter ); // compile to Func<Data, Data> return lambda.Compile();}然后，您可以像这样使用它：
var result = list.Select( CreateNewStatement( "Field1, Field2" ) );
