Question

我正在尝试使用ajax调用填充页面，并且只在我成功调用ajax时获取sql语句。

我的方法是：

$('#news-search').on('click', function (e) {
    e.preventDefault();
    $.ajax({
        type: 'post',
        url: '/news.aspx/NewsSearch',
        data: JSON.stringify({
            title: $('#txt_newsSearch').val()
        }),
        contentType: 'application/json;charset=utf-8',
        dataType: 'json',
        success: function(msg) {
            console.log(msg.d);

        },
        error: function (err, jqXHR) {
            console.log(jqXHR);
            console.log(err);

        }
    });
});

我在后面的代码中调用了一个webmethod：

[System.Web.Services.WebMethod]
public static string NewsSearch(string title)
{
    var obj = new NewsSearch();
    using (var db = new DbDataContext())
    {
        var q = db.News.Where(x => x.NewsTitle.Contains(title)).Select(x => new
        {
            x.Article,
            x.NewsTitle,
            x.PublishDate

        });            
        return q.ToString();  
    }
}

我创建了一个名为NewsSearch的类，其中包含我想要恢复的属性，我尝试在select中分配，但我不能。

如何获取成功调用返回的属性？

此时将其返回控制台。

SELECT [t0].[Article], [t0].[NewsTitle], [t0].[PublishDate]
FROM [dbo].[News] AS [t0]
WHERE [t0].[NewsTitle] LIKE @p0

Answer 1

以下代码将以JSON格式返回NewsSearch对象：

public class NewsSearchResult
{
    public string Article;
    public string NewsTitle;
    public DateTime PublishDate;
}

public class NewsSearch
{
    public List<NewsSearchResult> Results;
}

[System.Web.Services.WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public static NewsSearch NewsSearch(string title)
{
    var obj = new NewsSearch();
    using (var db = new DbDataContext())
    {
        var q = db.News.Where(x => x.NewsTitle.Contains(title)).Select(x => new NewsSearchResult
        {
            Article = x.Article,
            NewsTitle = x.NewsTitle,
            PublishDate = x.PublishDate,
        });            
        obj.Results = q.ToList();  
    }

    return obj;
}

Answer 2

您必须序列化结果，否则您将获得linq查询。

[System.Web.Services.WebMethod]
public static string NewsSearch(string title)
{
    var obj = new NewsSearch();
    using (var db = new DbDataContext())
    {
        var q = db.News.Where(x => x.NewsTitle.Contains(title)).Select(x => new
        {
            x.Article,
            x.NewsTitle,
            x.PublishDate

        });            
        JavaScriptSerializer json = new JavaScriptSerializer();
        return json.Serialize(q.ToArray());  
    }
}

不要忘记包含名称空间System.Web.Script.Serialization

查看代码项目文章Example Of JavaScript Serializer And Json String Using WebMethod

从$ .ajax调用

2 个答案: