保存在DataGrid的状态：可见列，列宽和顺序 [英] save state of a dataGrid: visible columns, columns width and order

问题描述

我要远程保存FLEX3的DataGrid的（对数据库）的状态（可见列，列宽和顺序）。

I want to save remotely (on a database) the state (visible columns, columns width and order) of a Flex3 DataGrid.

有关宽度和可见性，我可以简单地将它们保存通过访问各列的属性..丑，但有可能.. 但对于订单？我一定要动态创建DataGrid的??

For width and visibility I can simply save them by accessing each column attribute.. ugly but possible.. But for the order? Do I have to create the dataGrid dynamically??

任何想法是AP preciated 谢谢

Any idea is appreciated thanks

推荐答案

在我来说，我已经被头名保存的命令（我做你的DataGrid中始终具有相同的列头名的假设）。

In my case I have saved the order by header name (I'm making an assumption that your DataGrid always has the same columns and header names).

        for (var n:Number = 0; n< datagrid.columns.length; n++)
        {
            var thiscol:DataGridColumn = DataGridColumn(datagrid.columns[n]);
            colArray.addItem(thiscol.headerText);
        }

然后，我可以通过检索列标题的顺序列表，并根据需要交换的数据网格列的位置恢复列的顺序。

Then I can restore the column order by retrieving the ordered list of column headers, and swapping the position of columns in the datagrid as required.

        for (var n:Number = 0; n < colArray.length; n++)
        {
            moveColumnTo(String(colArray.getItemAt(n)), n);
        }

我已经定义了一个函数moveColumnTo（）来执行切换。

I have defined a function moveColumnTo() to perform the switch.

        private function moveColumnTo(columnName:String, columnIndex:Number):void
        {
            // Find current column position
            var i:Number = -1;
            for (var n:Number = 0; n < datagrid.columns.length; n++)
            {
                if (DataGridColumn(datagrid.columns[n]).headerText == columnName)
                {
                    i = n;
                    break;
                }
            }

            if (i == -1 || i == columnIndex) return; // Don't shift column

            this.mx_internal::shiftColumns(i, columnIndex); // Shift column to required position
        }

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