thank you very much for your reply！
But there are still some problems.When mode: 'remote', after entering some words in the tagbox, the drop-down list will find some matching options, but the entered words suddenly disappear. combobox does not have this problem

If I don't select any of the options in the drop-down, clicking the drop-down button again will find that the drop-down options are the ones that matched the word I just entered, not all of them.

Please override the 'tagFormatter' function to achieve your requirement.

Code:

$('#cc').tagbox({
	onBeforeLoad: function(){
		var data = $(this).tagbox('getData');
		var opts = $(this).tagbox('options');
		var values = $(this).tagbox('getValues');
		opts.mappingRows = opts.mappingRows||[];
		data = data.concat(opts.mappingRows);
		for(var i=0; i<values.length; i++){
			var item = $.easyui.getArrayItem(data, opts.valueField, values[i]);
			if (item){
				var row = $.easyui.getArrayItem(opts.mappingRows, opts.valueField, values[i]);
				if (!row){
					opts.mappingRows.push(item);
				}
			}
		}
	},
	tagFormatter: function(value,row){
		var opts = $(this).tagbox('options');
		if (row && row[opts.textField]){
			return row[opts.textField];
		}
		var mappingRows = opts.mappingRows||[];
		var item = $.easyui.getArrayItem(mappingRows, opts.valueField, value);
		return item ? item[opts.textField] : value;
	}
})

Ver:1.10.1
The tagbox is inherited from the ComboBox plugin, so I can use all the properties in the ComboBox plugin. When I use mode: "remote" in tagbox I got some exceptions.

Code:

<input name="item.graph_id" class="form-control easyui-tagbox" id="graph_id"
					data-options="required:true,valueField:'id',textField:'title',hasDownArrow: true,limitToList: true,
					url:'#(path)/graph/listj',mode:'remote',delay:500," 
					value="#(item.graph_id??)">

1、When you directly select some options from the drop-down options, and then enter some words, the selected value suddenly becomes the result of id. Finally, delete all the selected values, click the drop-down button, and find that the drop-down options are not the same as the beginning.

2、Chinese internationalization of tagbox is wrong, still in English

Your json data has the wrong format, please use the 'loadFilter' function to convert your original data to correct data format.

Code:

$('#tt').treegrid({
	loadFilter:function(data,parentId){
		function getRows(children){
			var rows = [];
			function setRows(pid, children){
				$.map(children, function(row){
					row._parentId = pid;
					rows.push(row);
					if (row.children && row.children.length){
						setRows(row.id, row.children);
					}
					row.children = undefined;
				});
			}
			setRows(null, children);
			return rows;
		}
		data.rows = getRows(data.rows);
		return data;
	}
})

thank you very much!

Please confirm if you removed the node successfully. Here is the example http://jsfiddle.net/mgq8h4d2/. It works fine.

Hello , The attachment is my example。
wait on line....

In my demo，when i delete the first node then it works fine. but when i delete the other nodes ,it doesn't work

The 'remove' method can remove the specified node. Please check your code carefully. If your issue continues, please provide an example to demonstrate your issue.

Code:

function deleteSubject(id){
	var t = $('#tt');
	$.messager.confirm('提示', '确定删除该科目？', function(r){
		if(r){
			var data1 = t.treegrid("getData");
			console.info(data1);
			t.treegrid("remove",id); 
			var data = t.treegrid("getData");
			console.info(data);
		}
	});
	
	/*var footer = t.treegrid("getFooterRows");
	var json = {};
	json.total = 10;
	json.rows = data;
	json.footer = footer;
	t.treegrid("loadData",json);*/
}

t.treegrid("remove",id);
         var data = t.treegrid("getData");
         console.info(data);

This is my code . After it is called, the html dom element is removed but when I invoke the  'getData' method, the result also contains the removed data。

easyui version 1.4 。 waiting.....

[<script type="text/javascript" src="jquery.easyui.min.js"></script>]

Please refer to the attached example 'tree_test.html'. It works fine.

Thank you very much！I change nothing，but change the version to 1.3.6 . It works well in my company code.
I also change the attached example 'tree_test.html' .
<!DOCTYPE html>
<html>
<head>
   <meta charset="UTF-8">
   <title>Basic Tree - jQuery EasyUI Demo</title>
   <link rel="stylesheet" type="text/css" href="http://www.jeasyui.com/easyui/themes/default/easyui.css">
   <link rel="stylesheet" type="text/css" href="http://www.jeasyui.com/easyui/themes/icon.css">
   <script type="text/javascript" src="http://www.jeasyui.com/easyui/jquery.min.js"></script>
   <script type="text/javascript" src="jquery.easyui.min.js"></script>  /**this file is 1.4.1 not 1.4.1.x ,it works well now.  but It doesn't work in my company . Strange 。***/
   <script type="text/javascript">
      $(function(){
         $('#tt').tree({
            lines:true,
            animate:true,
            onClick:function(node){
               console.log(node.text);
            }
         })
      })
   </script>
</head>

[console.info(node); -----------------------------------------is null why???]

$(function(){
   // 上级节点
   $('#cc').combotree();
   // 展示资源树
   $("#tt").tree({
      url:path+'/pdc_Resources/list',
      animate:true,
      lines:true,
      // 点击属性节点，表示要修改节点
      onClick:function(node){
         console.info(node); -----------------------------------------is null why???
         $("#res_content").children().remove(); // 删除先前load
         // 不是点击资源管理---进入修改
         if(node.id != 0){
            $("#res_content").load(path+"/pdc_Resources/edit/"+node.id);
         }else{
            $("#res_content").load(path+"/pdc_Resources/add");
         }
      },
      onLoadSuccess:function(node,data){
         $('#cc').combotree("loadData",data)
      }      
   });
   
});

My English is so bad .
EasyUI Vesion is 1.4.1 and I have add the easyui-1.4.1-patch.zip. but it doesn't work!