IEnumerator IEnumerable.GetEnumerator()
{
string url = PostHelper.BuildUrl(_criteria);
IEnumerable <Post> posts = PostHelper.PerformWebQueryAsync(url).Result;
return(posts.GetEnumerator());
}
public override object Execute(Expression expression)
{
string url = this.GetQueryText(expression);
IEnumerable <Post> post = PostHelper.PerformWebQueryAsync(url).Result;
return(post);
}
public override string GetQueryText(Expression expression)
{
SearchCriteria criteria;
//翻译查询条件
criteria = new PostExpressionVisitor().ProcessExpression(expression);
//生成URL
string url = PostHelper.BuildUrl(criteria, @"http://localhost/api/Cnblogs");
return(url);
}