ASP.NET MVC異步獲取和刷新ExtJS6 TreeStore

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ASP.NET MVC異步獲取和刷新ExtJS6 TreeStore

ASP.NET MVC異步獲取和刷新ExtJS6 TreeStore:從數(shù)據(jù)庫(kù)獲取構(gòu)造樹(shù)結(jié)構(gòu)是ExtJS TreePanel的核心技術(shù)，常用方法是TreeStroe里配置proxy，這種方式的root成了一個(gè)不受控制的節(jié)點(diǎn)。 TreeStroe的root實(shí)際是一個(gè)層疊json數(shù)據(jù)，大部分情況是直接寫(xiě)一些簡(jiǎn)單數(shù)據(jù)，但在實(shí)際應(yīng)用中必定是要從數(shù)據(jù)庫(kù)讀取的。我的方法

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導(dǎo)讀ASP.NET MVC異步獲取和刷新ExtJS6 TreeStore:從數(shù)據(jù)庫(kù)獲取構(gòu)造樹(shù)結(jié)構(gòu)是ExtJS TreePanel的核心技術(shù)，常用方法是TreeStroe里配置proxy，這種方式的root成了一個(gè)不受控制的節(jié)點(diǎn)。 TreeStroe的root實(shí)際是一個(gè)層疊json數(shù)據(jù)，大部分情況是直接寫(xiě)一些簡(jiǎn)單數(shù)據(jù)，但在實(shí)際應(yīng)用中必定是要從數(shù)據(jù)庫(kù)讀取的。我的方法

從數(shù)據(jù)庫(kù)獲取構(gòu)造樹(shù)結(jié)構(gòu)是ExtJS TreePanel的核心技術(shù)，常用方法是TreeStroe里配置proxy，這種方式的root成了一個(gè)不受控制的節(jié)點(diǎn)。

TreeStroe的root實(shí)際是一個(gè)層疊json數(shù)據(jù)，大部分情況是直接寫(xiě)一些簡(jiǎn)單數(shù)據(jù)，但在實(shí)際應(yīng)用中必定是要從數(shù)據(jù)庫(kù)讀取的。我的方法是先用Ext.Ajax.request獲取root數(shù)據(jù)形成TreeStroe。定義一個(gè)全局的TreeStroe名字是mTreeStore,用Ext.Ajax.request獲得root數(shù)據(jù)。TreeStoreRefresh函數(shù)與此類似，將mTreeStore的root換為新值。TreePanel的rootVisible屬性必須為true，增加一個(gè)節(jié)點(diǎn)單擊事件顯示節(jié)點(diǎn)的信息。

var mTreeStore = null;
Ext.Ajax.request({
 async: false,
 url: '/api/BasicData_API/GetBasicTablesTreeSource',
 method: 'get',
 success: function (response, options)
 {
 var TreeRoot = Ext.decode(response.responseText);
 mTreeStore = Ext.create('Ext.data.TreeStore',
 {
 root: TreeRoot
 });
 },
 failure: function (response, options)
 {
 //var responseArray = Ext.decode(response.responseText);
 Ext.Msg.alert('服務(wù)器錯(cuò)誤', '數(shù)據(jù)處理錯(cuò)誤原因:\n\r' + response.responseText);
 }
});

function TreeStoreRefresh()
{
 Ext.Ajax.request({
 async: false,
 url: '/api/BasicData_API/GetBasicTablesTreeSource',
 method: 'get',
 success: function (response, options)
 {
 var TreeRoot = Ext.decode(response.responseText);
 if (mTreeStore != null)
 {
 mTreeStore.setRoot(TreeRoot);
 }
 },
 failure: function (response, options)
 {
 //var responseArray = Ext.decode(response.responseText);
 Ext.Msg.alert('服務(wù)器錯(cuò)誤', '數(shù)據(jù)處理錯(cuò)誤原因:\n\r' + response.responseText);
 }
 });
}

Ext.define('TreeToolbarCls', {
 extend: 'Ext.toolbar.Toolbar',
 padding:'0 0 0 0',
 items: [{
 text: '刷新',
 iconCls: 'refresh',
 handler: TreeStoreRefresh,
 height: 30,
 width: 65
 }]
});

Ext.define('U1TreeCls',
{
 extend: 'Ext.tree.Panel',
 xtype: 'U1Tree_xtype',
 //title: '基礎(chǔ)數(shù)據(jù)字典',
 rootVisible: true,
 width: 300,
 store: mTreeStore,
 scrollable: true,
 tbar:Ext.create('TreeToolbarCls'),
 listeners:
 {
 itemclick: NodeClick
 }
});

function NodeClick(node, record, item, index, e, eOpts)
{
 if (typeof (record.data) == "undefined")
 {
 return;
 }
 var message = Ext.String.format('Level={0}<br/>state={1}', record.data.Level, record.data.state);
 Ext.Msg.alert("節(jié)點(diǎn)信息", message);
}

下面是后臺(tái)C#代碼

定義一個(gè)TreeNode類，包含TreePanel節(jié)點(diǎn)固有的一些屬性，也可以任意擴(kuò)充，利用這個(gè)可以自定義許多附加數(shù)據(jù)，如我在里面定義Level表示節(jié)點(diǎn)的級(jí)別。

 [Authorize]
 [RoutePrefix("api/BasicData_API")]
 public class BasicData_APIController : ApiController
 {
 [Route("GetBasicTablesTreeSource")]
 public HttpResponseMessage GetBasicTablesTreeSource(string condition = null)
 {
 List<TreeNode> lstF = new List<TreeNode>();
 ZydAdonet z = ZydAdonet.Instance();
 string s1 = "select TableName,title from BaseDataTables order by TableName";
 string sqltext = s1;
 DataTable dt1;
 string ErrMes;
 z.Sql2DTReadOnly(s1, out dt1, null, out ErrMes);
 TreeNode tnd;
 foreach (DataRow drx in dt1.Rows)
 {
 tnd = new TreeNode
 {
 id = drx["TableName"].ToString(),
 text = drx["title"].ToString(),
 Level = 1,
 iconCls = "table_6",
 state = drx["TableName"].ToString() + " OK",
 leaf = true
 };
 lstF.Add(tnd);
 }
 TreeNode root = new TreeNode
 {
 text = "基礎(chǔ)數(shù)據(jù)字典",
 expanded = false,
 iconCls = "folder_close",
 Level = 0,
 state = "RootOfTree",
 leaf = true
 };
 if (lstF.Count > 0)
 {
 root.expanded = true;
 root.leaf = false;
 root.iconCls = "folder_open";
 root.children = lstF;
 }

 string JsonStr;
 JsonStr = JsonConvert.SerializeObject(root);
 HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK, "value");
 response.Content = new StringContent(JsonStr, Encoding.GetEncoding("UTF-8"), "application/json");
 response.Headers.CacheControl = new CacheControlHeaderValue()
 {
 MaxAge = TimeSpan.FromMinutes(10)
 };
 return response;
 }
 }

 internal class TreeNode
 {
 public string id { get; set; }
 public string text { get; set; }
 public string iconCls { get; set; }
 public string state { get; set; }
 public bool leaf { get; set; }
 public int Level { get; set; }
 public bool expanded { get; set; }
 public List<TreeNode> children { get; set; }
 }

在NodeClick函數(shù)中斷可以監(jiān)視到更多的信息：