我正在尝试构建一个树形面板(或者只是一个简单的树,我只需要它工作)并使用数据库中的数据加载它
这是我构建树的代码
var objHandler = new Interact();
var treestore = new Ext.data.TreeStore ( {
root:{
id:'root_node',
nodeType:'async',
text:'Root'
},
proxy:{
type:'ajax',
url:'myUrl'
}
});
function ReadTree() {
try {
objHandler.ReadAssets(function (serverResponse) {
if (serverResponse.error == null) {
var result = serverResponse.result;
if (result.length > 2) {
treestore.load(Ext.decode(result));//TreeStore does not inherit from Ext.data.Store and thus does not have a loadData method. Both TreeStore and Store inherit from Ext.data.AbstractStore which defines a load method only. Therefore TreeStore has a load method
}
}
else {
alert(serverResponse.error.message);
}
}); //eo serverResponse
} //eo try
catch (e) {
alert(e.message);
}
}
var AssetTree = Ext.create('Ext.tree.Panel', {
title: 'Asset Tree',
width: 200,
height: 150,
store: treestore,
// loader: new Ext.tree.TreeLoader({ url: 'myurl' }),
columns: [
{ xtype: 'treecolumn',text : 'First Name', dataIndex :'Title'}/*,
{text : 'Last', dataIndex :'Adress'},
{text : 'Hired Month', dataIndex :'Description'}*/
],
autoscroll : true
});
ReadTree();
我正在使用 jayrock:http ://code.google.com/p/jayrock/
交互.ashx.cs:
公共类交互:JsonRpcHandler {
[JsonRpcMethod()]
public string ReadAssets()
{
// Make calls to DB or your custom assembly in project and return the result in JSON format. //This part is making custom assembly calls.
clsDBInteract objDBInteract = new clsDBInteract();
string result;
try
{
result = objDBInteract.FetchAssetsJSON();
}
catch (Exception ex)
{
throw ex;
}
return result;
}
clsDBInteract.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Data.Sql;
using System.Data.SqlClient;
using Extensions;
namespace WebBrowser
{
public class clsDBInteract
{
SqlConnection dbConn = new SqlConnection("server=***********; user id = *****; password = ******; Database=*******");
/////// data to fill assets grid
public DataSet FetchAssetsDS()
{
DataSet ds = new DataSet();
try
{
SqlCommand sqlCommand = new SqlCommand("select Title, adress, Description from table");
sqlCommand.Connection = dbConn;
sqlCommand.CommandType = CommandType.Text;
SqlDataAdapter sda = new SqlDataAdapter(sqlCommand);
dbConn.Open();
sda.Fill(ds);
if (sqlCommand.Connection.State == ConnectionState.Open)
{
dbConn.Close();
}
//ds = sqlCommand.ExecuteNonQuery();
}
catch (Exception ex)
{
throw ex;
}
return ds;
}//eo FetchAssetsDS
public string FetchAssetsJSON()
{
string result = string.Empty;
try
{
DataSet ds = FetchAssetsDS();
result = ds.ToJSONString(); // This method will convert the contents on Dataset to JSON format;
}
catch (Exception ex)
{
throw ex;
}
return result;
}//eo FetchAssetsJSON
}//eo clsDBInteract
}
我没有任何错误,但面板是空的,我测试过,我可以读取 readtree 函数中的数据..所以我猜问题可能出在商店或加载中
我已经两个多星期了,我试图解决这个问题,任何帮助都将不胜感激
PS:我使用 ExtJs4 和 c# .net
谢谢