【一】zTree 同步加載（第一個例子）

本文轉載自查看原文 2012-08-08 16:53 5502 zTree/ 加載

zTree.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.Web;

/// <summary>
/// zTree 的摘要說明
/// </summary>
public class zTree
{
     #region 構造函數
     public zTree()
    {
         //
         // TODO: 在此處添加構造函數邏輯
         //
    }
     #endregion

     public string GetModule()
    {
         string sql = " SELECT m.ID, m.Name, m.ParentID, m.Url, m.Ico FROM Module m ORDER BY m.Level, m.[Index] ";
        DataTable dt = Common.GetTable(sql);
         string treeJson = DtToJson(dt, " ParentID ", " 0 ", " ID ", " Name ").Substring( 12);
         return treeJson;
    }
     // json處理

     public static string DtToJson(DataTable dt, string pField, string pValue, string kField, string TextField)
    {
        StringBuilder sb = new StringBuilder();
         string filter = String.Format( " {0}='{1}' ", pField, pValue); // 獲取頂級目錄.
        DataRow[] drs = dt.Select(filter);
         if (drs.Length < 1)
             return "";
        sb.Append( " ,\"children\":[ ");
         foreach (DataRow dr in drs)
        {
             string pcv = dr[kField].ToString();
            sb.Append( " { ");
            sb.AppendFormat( " \"name\":\"{0}\", ", dr[TextField].ToString());
            sb.AppendFormat( " \"id\":\"{0}\", ", dr[kField].ToString());
            sb.AppendFormat( " \"pId\":\"{0}\", ", dr[kField].ToString());
            sb.AppendFormat( " \"url\":\"{0}\", ", " http://www.baidu.com ");
            sb.AppendFormat( " \"icon\":\"{0}\", ", "");
            sb.AppendFormat( " \"open\":\"{0}\", ", true);
            sb.AppendFormat( " \"checked\":\"{0}\" ", false);

            sb.Append(DtToJson(dt, pField, pcv, kField, TextField).TrimEnd( ' , '));
            sb.Append( " }, ");
        }
         if (sb.ToString().EndsWith( " , "))
        {
            sb.Remove(sb.Length - 1, 1);
        }
        sb.Append( " ] ");
         return sb.ToString();
    }
}

Common.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.OleDb;
using System.Linq;
using System.Web;

/// <summary>
/// Class1 的摘要說明
/// </summary>
public class Common
{
     public Common()
    {
         //
         // TODO: 在此處添加構造函數邏輯
         //
    }

     public static DataTable GetTable( string sql)
    {
         string strConn = @" Provider=SQLOLEDB;Data Source=127.0.0.1\SQLEXPRESS;Initial Catalog=a;User Id=sa;Password=123456; ";
        DataSet ds = new DataSet();
        DataTable dt = new DataTable();
         using (OleDbConnection conn = new OleDbConnection(strConn))
        {
             if (conn.State != ConnectionState.Open)
                conn.Open();
            OleDbCommand comm = new OleDbCommand(sql, conn);
            OleDbDataAdapter da = new OleDbDataAdapter(comm);
            da.Fill(ds);
             if (conn.State != ConnectionState.Closed)
                conn.Close();
        }
        dt = ds.Tables[ 0];
         return dt;
    }
}

Handler.ashx

<%@ WebHandler Language= " C# " Class= " Handler " %>

using System;
using System.Web;

public class Handler : IHttpHandler {

     public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = " text/plain ";
         string method = context.Request[ " action "];
         switch (method)
        {
             case " GetModule ":
                {
                     string a = context.Request.Params[ " id "]; // 參數為id
                    zTree zTree = new zTree();

                    context.Response.Write(zTree.GetModule());
                     break;
                }
             default:
                 break;
        }
    }

     public bool IsReusable {
         get {
             return false;
        }
    }

}

aspx

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