Question

我正在尝试使用Web服务和Linq To Sql进行自动完成搜索以访问数据库。

这是我的代码。这会返回与任何搜索字词匹配的结果，我想对其进行修改，以便每个结果都包含所有搜索字词。

我知道SQL全文搜索可能是最优雅的解决方案，但我想看看是否可以在不修改数据库的情况下实现此功能。

 string[] searchTerms = searchString.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries).ToArray();
        IQueryable<AccountResult> results = db.cdAccounts
            .Select(x =>
                new AccountResult()
                {
                    idAccount = x.id_Account,
                    AccountName = x.AccountNme,
                    AccountNumber = x.AccountNum
                }).Distinct().OrderBy(x => x.AccountName);
        foreach (string searchTerm in searchTerms)
            results = results.Where(x => x.AccountName.Contains(searchTerm) || x.AccountNumber.Contains(searchTerm));

        return results.OrderBy(x => x.AccountName).Take(40).ToList();

Answer 1

我最终使用linq搜索第一个术语，然后是否有多个术语。我愿意接受改进/优化。

//...
if (searchTerms.Count() > 1)
{
    List<string> remainingSearchTerms = new List<string>();
    for (int x = 1; x < searchTerms.Count(); x++)
        remainingSearchTerms.Add(searchTerms[x]);
    List<SearchResult> matchingResults = new List<SearchResult>();

    foreach (SearchResult result in allResults)
        if (MatchSearchTerms(new string[] { result.Name, result.Number, result.id.ToString() }, remainingSearchTerms.ToArray()))
            matchingResults.Add(result);

    return matchingResults.OrderBy(x => x.Name).Take(MaxResults).ToList();
}
else
    return allResults.OrderBy(x => x.Name).Take(MaxResults).ToList();
//...

private bool MatchSearchTerms(string[] searchFields, string[] searchTerms)
{
    bool match = true;
    foreach (string searchTerm in searchTerms)
    {
        if (match)
        {
            bool fieldMatch = false;
            foreach (string field in searchFields)
            {
                if (field.ToLower().Contains(searchTerm.ToLower()))
                {
                    fieldMatch = true; //Only one field needs to match the term
                    break;
                }
            }
            match = fieldMatch;
        }
        else
            break;
    }
    return match;
}

Answer 2

我不知道linq to sql，但是当你应该追加结果时，看起来你正在为每个循环重新分配结果。

Linq To Sql搜索多列和多个单词

2 个答案: