使用json来传递值

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Data;

using System.Web.Script.Serialization;

public void ProcessRequest(HttpContext context)

{

context.Response.ContentType = "text/plain";

string strValue = context.Request["value"];

List list = GetModelList(strValue);

JavaScriptSerializer jss = new JavaScriptSerializer();

string str2 = jss.Serialize(list);

context.Response.Write(str2);

}

/// 获得数据列表

///

public List GetModelList(string strValue)

{

string sql1 = "select * from city where proID=" + strValue;

DataTable dt = new DataTable();

dt = SqlHelper.ExecuteDataTable(sql1);

return DataTableToList(dt);

}

public static Model DataRowToModel(DataRow row)

{

Model model = new Model();

if (row != null)

{

if (row["cityID"] != null && row["cityID"].ToString() != "")

{

model.CityID = int.Parse(row["cityID"].ToString());

}

if (row["cityName"] != null)

{

model.cityName = row["cityName"].ToString();

}

if (row["proID"] != null && row["proID"].ToString() != "")

{

model.ProID = int.Parse(row["proID"].ToString());

}

}

return model;

}

/// 获得数据列表

///

public List DataTableToList(DataTable dt) {

List modelList = new List();

int rowsCount = dt.Rows.Count;

if (rowsCount > 0)

{

Model model;

for (int n = 0; n < rowsCount; n++)

{

model = DataRowToModel(dt.Rows[n]);

if (model != null)

{

modelList.Add(model);

}

}

}

return modelList;

}