asp.net中如何使用json?

Question

问题如下：
我有一个a页面，访问它时，将在页面打印Json格式的数据，例如：
{"xuenian":"2007-2008","xueqi":"1","startTime":"2009-07-19 08:30","endTime":"2009-07-22 18:00","menshu":"10","isReadDB":"Y"}然后 我在B页面里访问a页面，希望能在b页面中获得以上打印的值保存在一个变量里，请问各位大大怎么写，谢谢了如果有人知道，请说详细点，有示例更好！

Answer 1

1 xmlhttp or xmlhttprequest

Answer 2

3.5里已经有JSON类了 System.Runtime.Serialization.Json 
以前版本没得，感觉失败。。

Answer 3

参考
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Text;
/// <summary>
/// </summary>
public static class Json
{    public static string CreateJsonParameters1(DataTable dt)
    {
        StringBuilder JsonString = new StringBuilder();
        //Exception Handling        
        if (dt != null && dt.Rows.Count > 0)
        {
            JsonString.Append("{\"totalCount\":" + dt.Rows.Count.ToString() + ",");
            JsonString.Append("\"JsonData\":[");
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                JsonString.Append("{");
                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    if (j < dt.Columns.Count - 1)
                    {
                        JsonString.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + "\"" + dt.Rows[i][j].ToString() + "\",");
                    }
                    else if (j == dt.Columns.Count - 1)
                    {
                        JsonString.Append("\"" + dt.Columns[j].ColumnName.ToString() + "\":" + "\"" + dt.Rows[i][j].ToString() + "\"");
                    }
                }
          
                if (i == dt.Rows.Count - 1)
                {
                    JsonString.Append("}");
                }
                else
                {
                    JsonString.Append("},");
                }
            }
            JsonString.Append("]}");
            return JsonString.ToString();
        }
        else
        {
            return null;
        }
    }
}

Answer 4

public static string ToJson(this object obj)
       {
           DataContractJsonSerializer serializer = new DataContractJsonSerializer(obj.GetType());
           Stream stream = new MemoryStream();
          serializer.WriteObject(stream, obj);
          stream.Position = 0;
           StreamReader streamReader = new StreamReader(stream);
          return streamReader.ReadToEnd();
       }
参考