Question

基本上我想要的是过滤数据网格中的值。我已经看到几个成功完成这个的例子。像这些

http://dalvinder.serveblog.net/2011/06/25/flex-spark-datagrid-filtering/？

http://blog.bobklaas.com/?p=126？

问题是所有这些示例都使用预定义的arraycollection作为其数据网格的数据提供者，而我使用callresponder结果作为数据提供者。目前，我正在使用php服务从数据库中检索数据并填充我的数据网格，所以我的代码看起来像这样

    <mx:DataGrid x="34.3" y="99.65" id="dataGrid"   creationComplete="dataGrid_creationCompleteHandler(event)" dataProvider="{getAllStudentsResult2.lastResult}"  width="711" headerHeight="25" change="dataGrid_changeHandler(event)" styleName="table" height="367"
                     alternatingItemColors="[#e0e0e0, #cacaca]"
                     horizontalScrollPolicy="auto">

似乎我无法过滤来自callresponder结果的值，所以我尝试使用这样的resultevent处理程序将callresponder结果转移到另一个arraycollection

[Bindable]private var searchArray:ArrayCollection = new ArrayCollection();//variable declaration


protected function getAllStudents2Result_resultHandler(event:ResultEvent):void
        {
            searchArray = event.result as ArrayCollection;  
        }

然后我将我的数据网格提供程序更改为此

dataProvider="{searchArray}"

然后我使用blog.bobklaas.com/?p=126中的代码来过滤我的数据网格

            public function filterResults():void
        {

            var filterText:String = StringUtil.trim(keyword.text.toLowerCase()); //Trimmed text String to filter by
            var columnArray:Array = ['ID','FirstName','Lastname', 'Location', 'Level']; //Datagrid column names to filter on
            var gridDataProvider:ArrayCollection = searchArray; //Name of datagrid's dataprovider. In this case e.g. databases
            var dataGridName:String = 'dataGrid'; //Name of the datagrid you are filtering by

            //Do not edit code past this point
            var filteredData:Array = [];
            var added:Boolean=false;
            var i:int;
            var j:int;

            // Loop Through Grid
            for(i=0; i < gridDataProvider.length; i++){    
                added = false;
        //  Alert.show(gridDataProvider.getItemAt(i).toString());
                //Loop through grid column
                for(j=0; j<columnArray.length; j++){  


                    if(gridDataProvider[i][columnArray[j]]!=null){
                        //Grab datagrid cell contents, trim it, and convert to lowercase for comparison.
                        var filterString:String = gridDataProvider[i][columnArray[j]].toString().toLowerCase();

                        //Compare the datagrid string(filterString) to the user typed string(filterText).  
                        if(!added){      
                            //If the datagrid string matches the users string, put it into the array.

                            if(filterString.indexOf(filterText) != -1){

                                filteredData.push(gridDataProvider[i]);
                                added = true;
                            } 
                        }else{
                            //Do nothing, break out.
                            break;
                        }
                    }    
                }
            }

            //Set datagrid dataprovider
            if(filterText.length == 0){
                this[dataGridName].dataProvider = gridDataProvider; //Display the original unfiltered data
            }else{
                this[dataGridName].dataProvider = filteredData; //Pusht he filtered data into the datagrid
            }
        }

我运行应用程序后没有任何反应。我仍然无法过滤searchArray中的值。

任何人都可以提出更好的解决方案，或者我做错了什么？

Answer 1

接缝是空白的，因为： searchArray = event.result as ArrayCollection;

你是复制指针地址而不是数据; 如果删除搜索数组，则event.result也将被删除。

我有同样的问题，我找不到呼叫响应器上的过滤器，这是我的代码

protected function getServiciosResult_resultHandler(event:ResultEvent):void
        {
            var i:int;
            var searchArray2:ArrayCollection;
            searchArray2= event.result as ArrayCollection;
            searchArray = new ArrayCollection();
            for(i=0;i<searchArray2.length;i++){
                searchArray.addItem(searchArray2[i]);
            }

        }

如果您注意到，我将数据从searchArray2复制到searchArray。感谢您的代码，它帮助我完成了我的代码。

使用PHP服务从call responder lastResult过滤datagrid，dataprovider

1 个答案: