详解Jquery EasyUI tree 的异步加载(遍历指定文件夹,根据文件夹内的文件生成tree)

Jquery EasyUI tree 的异步加载(遍历指定文件夹,根据文件夹内的文件生成tree)具体代码如下:

private void SMT(HttpContext context)

{

string SqlConnection82 = System.Configuration.ConfigurationManager.AppSettings["LocalConnectionString"];

string path = context.Server.MapPath(@"~/CISWeb/SMT_SOP");

string id = string.Empty;

List<string> filesNameList = getFiles(path);

if (filesNameList.Count > 0)

context.Response.Write(ListToJson(filesNameList,id));

else

{

context.Response.Write("0");

}

}

/// <summary>

/// 范围指定目录下的 文件夹/文件 数量

/// </summary>

/// <param name="path"></param>

/// <returns></returns>

private static List<string> getFiles(string path)

{

DirectoryInfo SMT_SOP = new DirectoryInfo(path);

List<string> allFileList = new List<string>();

DirectoryInfo[] allDir = SMT_SOP.GetDirectories();//获取文件夹数量

foreach (DirectoryInfo d in allDir)

{

allFileList.Add("0|" + d.Name);

}

FileInfo[] allFile = SMT_SOP.GetFiles();//获取文件数量

foreach (FileInfo fi in allFile)

{

allFileList.Add("1|" + fi.Name);

}

return allFileList;

}

/// <summary>

/// 遍历指定文件夹,根据文件夹内的文件返回JSON

/// </summary>

/// <param name="filesNameList"></param>

/// <param name="id">第一次调用这个方法的时候,id=""</param>

/// <returns></returns>

public string ListToJson(List<string> filesNameList,string id)

{

StringBuilder sb2 = new StringBuilder();

sb2.Append("[");

for (int i = 0; i < filesNameList.Count; i++)

{

if (filesNameList[i].ToString().Split('|')[0] == "0")

{

sb2.Append("{ \"id\":" +id+ (i + 1).ToString() + ",\"text\":\"" + filesNameList[i].ToString().Split('|')[1] + "\",\"state\":\"closed\",\"children\": [");

sb2.Append("]},");

}

else

{

sb2.Append("{\"id\":"+id + (i + 1).ToString() + ",\"text\":\"" + String.Format(filesNameList[i].ToString().Split('|')[1]) + "\"},");

}

}

sb2.Remove(sb2.Length - 1, 1);

sb2.Append("]");

return sb2.ToString();

}

前台

$.ajax({

type: "post",

url: "../../ajax/Handler.ashx?action=SMT",

data: {},

success: function (result) {

$("#menuDiv").dialog("open");//jQuery UI中的模态窗口

var treeData = eval(result);

$("#tt").tree({

data: treeData})

}

})

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