从 sqlite Foxit SDK FullTextSearch 中检索结果

问题描述

我正在 Xamarin.Android 中尝试使用 Foxit Pdf Sdk 的 FullTextSearch 函数。 根据他们的文档，结果保存在 sqlite 中。 我在从 sqlite 检索结果时遇到问题，并且在 Foxit Sdk 中没有关于检索的文档。

这是我的代码。

int errCode = Library.Initialize(sn,key);
            if (errCode != Constants.EErrSuccess)
                return string.Empty;

            var search = new FullTextSearch();
            string dbPath = database;
            search.SetDataBasePath(dbPath);
            // Get document source information.
            DocumentsSource source = new DocumentsSource(directory);

            // Create a Pause callback object implemented by users to pause the updating process.
            PauseUtil pause = new PauseUtil(30);

            // Start to update the index of PDF files which receive from the source.
            Progressive progressive = search.StartUpdateIndex(source,pause,false);
            int state = Progressive.etoBeContinued;
            while (state == Progressive.etoBeContinued)
            {
                state = progressive.Resume();
            }

            // Create a callback object which will be invoked when a matched one is found.
            MySearchCallback searchCallback = new MySearchCallback();

            // Search the specified keyword from the indexed data source.
            bool isFinished = search.SearchOf(searchIndex,FullTextSearch.ERankHitCountASC,searchCallback);

解决方法

首先，我在 SearchCallBack 函数中创建了一个属性。

public List<DtoSearchResult> SearchResults { get; set; }

当覆盖 RetrieveSearchResult 正在处理时，我将结果添加到列表中

public override int RetrieveSearchResult(string filePath,int pageIndex,string matchResult,int matchStartTextIndex,int matchEndTextIndex)
        {
            try
            {
                DtoSearchResult result = new DtoSearchResult();
                result.FilePath = filePath;
                result.MatchResult = matchResult;
                result.PageIndex = pageIndex;
                SearchResults.Add(result);
                return 0;
            }
            catch (System.Exception ex)
            {

                throw ex;
            }
            
        }

然后我从活动中调用了 SearchResults 属性。

searchCallback.SearchResults = new List<DataTransferObjects.DtoSearchResult>();
bool isFinished = search.SearchOf(searchIndex,FullTextSearch.ERankHitCountASC,searchCallback);
var result = searchCallback.SearchResults;