if (dataType == "SearchCustomer")
        {
          int ID;
          if (Int32.TryParse(CustomerID, out ID))
          {
            string s = GridComputer.GridCustomer.getCustomer(1, 1, ID);
            if (s == null)
            {
              context.Response.ContentType = "text/plain";
              context.Response.Write("[{\"name\":无用户,\"id\":\"0\",\"company\":\"无用户\"}]");
            }
            else { context.Response.Write(s); }
          }
 
        } 

 $(document).ready(function () {
      $("#Button3").click(
    function (SucCallback) {
      $.ajax(
      {
        type: "get",
        url: 'GridDatas.ashx', //后台处理程序  
        dataType: 'json',   //接受数据格式  
        data: 'DataType=SearchCustomer&CustomerID=' + document.getElementById("Text3").value,     //要传递的数据  
        success:SucCallback,
        error: function () { alert("error"); }
      });
    })
    })

grid.getCustomer(1,2,function (data) {
    var list = '<p>' + tree_GridInfo._name + '的用户有</p><br>';
    list += '<table id="customers"><tr><th>姓名</th><th>电话</th></tr> ';
    $.each(data, function (i, n) {
      list += '<tr onclick="showUser(' + 1 + ')"><td>';
      list += n.name + '</td>' + '<td>' + n.company;
      list += '</td></tr>';
    });
    $("#SearchResult").html(list)

context.Response.Write("{\"name\":无用户,\"id\":\"0\",\"company\":\"无用户\"}");

$(document).ready(function () {
      $("#Button3").click(
    function (SucCallback) {
      $.ajax(
      {
        type: "get",
        url: 'GridDatas.ashx', //后台处理程序  
        dataType: 'json',   //接受数据格式  
        data: 'DataType=SearchCustomer&CustomerID=' + document.getElementById("Text3").value,     //要传递的数据  
        function (dataJson) {
           alert(dataJson.Name);
           alert(dataJson.Id);
        },
        error: function () { alert("error"); }
      });
    })
    })