jquery autocomplete

 public class JsonHandler : IHttpHandler     {

        public void ProcessRequest(HttpContext context)         {             string str = context.Request.QueryString["q"];

            DataTable dt = new DataTable();             DataColumn copycolumn1 = new DataColumn("name", typeof(String));             DataColumn copycolumn2 = new DataColumn("code", typeof(String));             DataColumn copycolumn3 = new DataColumn("spell", typeof(String));             dt.Columns.Add(copycolumn1);             dt.Columns.Add(copycolumn2);             dt.Columns.Add(copycolumn3);

            for (int i = 0; i < 10; i++)             {                 DataRow row = dt.NewRow();                 row["name"] = "深发展A"+i;                 row["code"] = "000001";                 row["spell"] = "sfza";                 dt.Rows.Add(row.ItemArray);                 DataRow row1 = dt.NewRow();                 row1["name"] = "苹果A" + i;                 row1["code"] = "000002";                 row1["spell"] = "apple";                 dt.Rows.Add(row1.ItemArray);             }             string str1 = DataTableToJson(dt);             context.Response.ContentType = "application/json";             context.Response.Write(str1);         }

        public bool IsReusable         {             get             {                 return false;             }         }

        /// <summary>          /// dataTable转换成Json格式          /// </summary>          /// <param name="dt"></param>          /// <returns></returns>          public string DataTableToJson(DataTable dtChild)         {             StringBuilder jsonBuilder = new StringBuilder();             jsonBuilder.Append("[");             for (int i = 0; i < dtChild.Rows.Count; i++)             {                 jsonBuilder.Append("{");                 for (int j = 0; j < dtChild.Columns.Count; j++)                 {                     jsonBuilder.Append("");                     jsonBuilder.Append(dtChild.Columns[j].ColumnName);                     jsonBuilder.Append(":\"");                     jsonBuilder.Append(dtChild.Rows[i][j].ToString());                     jsonBuilder.Append("\",");                 }                 jsonBuilder.Remove(jsonBuilder.Length - 1, 1);                 jsonBuilder.Append("},");             }             jsonBuilder.Remove(jsonBuilder.Length - 1, 1);             jsonBuilder.Append("]");             return jsonBuilder.ToString();         }              }