C# ListView 列寬調整 刷新

/***********************************************************************
 *                    C# ListView 列寬調整 刷新 
 * 說明：
 *     記錄將C#中的ListView列寬設置為自動調整。
 *
 *                                   2016-7-5 深圳 南山平山村 曾劍鋒
 **********************************************************************/

一、參考文章：
    1. C# ListView Column Width Auto
        http://stackoverflow.com/questions/1257500/c-sharp-listview-column-width-auto
    2. C# Clear all items in ListView
        http://stackoverflow.com/questions/435379/c-sharp-clear-all-items-in-listview

二、有效信息：
    You gave the answer: -2 will autosize the column to the length of the text in the column header, -1 will autosize to the longest item in the column. All according to MSDN. Note though that in the case of -1, you will need to set the column width after adding the item(s). So if you add a new item, you will also need to assign the width property of the column (or columns) that you want to autosize according to data in ListView control.