将 json 数据从 webservice 放入 sql 数据库答案

【问题标题】：placing the json data to sql database from webservice将 json 数据从 webservice 放入 sql 数据库
【发布时间】：2010-08-25 09:27:47
【问题描述】：

这是我检索用户名的特定 web 服务代码，我如何编写 c# 代码将 json 数据放置到 web 服务中的 sql 数据库并在 html 页面中显示确认

public class AjaxService : System.Web.Services.WebService
{
    [WebMethod]
    public bool CheckUserNameAvailability(string userName)
    {
        List<String> userNames = new List<string>() { "azamsharp", "johndoe", "marykate", "alexlowe", "scottgu" };

        var user = (from u in userNames
                    where u.ToLower().Equals(userName.ToLower())
                    select u).SingleOrDefault<String>();

        return String.IsNullOrEmpty(user) ? true : false; 

    }

}

}

【问题讨论】：

标签： c# jquery ajax sql-server-2005 json

【解决方案1】：

如下装饰您的 AjaxService 类：

[WebService(Description = "Web services to query the book database.", Namespace ="http://www.your-site-url.com/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ScriptService]
public class AjaxService: System.Web.Services.WebService
{

    [WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public bool CheckUsernameAvailability(string userName, Options options)
    {
        return this.WriteToSql(options);
    }

    private bool WriteToSql(Options options)
    {
        bool result = false;

        try
        {
            SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["SqlConnectionString"].ConnectionString);

            SqlCommand command = new SqlCommand("INSERT_OPTION", connection);
            command.CommandType = CommandType.StoredProcedure;
            command.Parameters.Add("@Option1", SqlDbType.NVarChar, 20).Value = options.Option1;
            command.Parameters.Add("@Optoin2", SqlDbType.Bit).Value = (options.Option2 == true ) ? 1 : 0;

            connection.Open();
            command.ExecuteNonQuery();
            connection.Close();

            result = true;
        }
        catch(Exception ex)
        {
            //do some logging here...
            result = false;
        }

        return result;
    }
}

[Serializable]
public class Options
{
    public string Option1 { get; set; }
    public bool Option2 { get; set; }
}

那么您的 JQuery 将如下所示：

$( function(){

    $.ajax({
        type: 'POST',
        contentType: "application/json; charset=utf-8",
        url: "AjaxService.asmx/CheckUsernameAvailability",
        data: { userName: 'TestUsername', options: { Option1: 'test', Option2: 'false' } },
        success: function(msg) {
            //display acknowledgement here. DO NOT USE EVAL! It's bad.

            var result = eval(msg);
            alert(result);
        } 
    });

});

【讨论】：