Ext Js组合按不同项目过滤

问题描述

我有两个要求绑定EXT Js组合

I have two requirement to bind the EXT Js combo

- 组合中的第一个项目应该有固定的文本，如Unfilterd

-- The first Item in the combo should have the fixed text such as "Unfilterd"

- 之后，我需要将数据存储绑定到上述组合。数据存储区重新创建了columnA值，因此如何对数据存储区进行过滤，以使其在绑定组合之前在列A中具有不同的行。

-- After that I need to bind the data store to the above combo. The datastore has repated columnA values, so how can filter the datastore so that it has distinct rows in a columnA before binding the combo.

注意：

我使用数据存储绑定网格panle，我不想创建另一个对数据库的调用。这就是为什么我寻找一个解决方案来过滤Ext Js数据存储的数据的原因。

I am using the data store to bind the grid panle aswell, I do not want to create another call to database. That's the reason why I am looking for a solution to filter the data by Ext Js datastore.

我的示例代码如下

extManager1.comboFilter = new Ext.form.ComboBox({
                  editable: false
                , id: 'BaseTemplate'
                , fieldLabel: 'Base Templates'
                , name: 'BaseTemplate'
                , editable: false
                , store: extManager1.GetTemplateDetails
                , displayField:'FilterBy'
                , valueField: 'value'
                , mode: 'local'
                , boxLabel: 'BaseTemplate'
                , typeAhead: true
                , triggerAction: 'all'
                , forceSelection: true
                , selectOnFocus: true
                , emptyText:'Unfilterd'
                ,listeners:{select:{fn:function(combo, value) {

                //This code filters the grid panel data by selected combo value
                Ext.getCmp('TemplateGridPanel').store.filter('productdisplayheading', combo.getValue());

                }}

                }

    });

推荐答案

您可能需要创建另一个存储对象内容您需要。但是没有必要从数据库中重新获取数据 - 您可以使用 extManager1.GetTemplateDetails 存储中的数据填充新存储。请查看 - 它可用于从现有商店获取不同的值。

You will probably need to create another store object with the contents you need. But there's no need to fetch the data again from the database - you can populate the new store with the data in your extManager1.GetTemplateDetails store. Take a look at the collect method of ExtJS Store - it can be used to fetch distinct values from an existing store.

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