sql - 是否可以将未绑定(bind)的列插入到绑定(bind)的数据 GridView 中？

Question

我有一个 datagridview，绑定(bind)到数据和运行膨胀。两列中的数据是整数，但它们具有我希望表单用户看到的含义。

Column 1       Column 2       Column 3       Column 4
_____________________________________________________
Bob            1              2               Yes
Mary           1              3               No
Tod            2              2               No
Beth           3              3               Yes

其中 1、2 和 3 类似于工作技能。所以我想隐藏第 2 列和第 3 列并从 SQL 来回解释。

Column 1       Column 2       Column 3       Column 2a        Column 3a        Column 4
_______________________________________________________________________________________
Bob            1              2              Accounting      Admin            Yes
Mary           1              3              Accounting      Manager          No
Tod            2              2              Architect       Admin            No
Beth           3              3              IT              Manager          Yes

只能想象第 2 列和第 3 列是隐藏的，也许 2a 和 3a 是组合框，它们背后有代码将字符串转换为整数。

该项目太大，无法首先修复它以使用字符串。我对其他建议持开放态度，例如制作基于另一个 SQL 命令的数据绑定(bind)和功能的第 2 列和第 3 列组合框。不过，我看不出它是如何工作的。

Answer 1

来自 Data Binding with Windows Forms 2.0: Programming Smart Client Data Applications with .NET :

There are two primary ways to populate the contents of unbound columns: handling the RowsAdded event or handling the CellFormatting event. The former is a good place to set the cell’s value to make it available for programmatic retrieval later. The latter is a good place to provide a value that will be used for display purposes only and won’t be stored as part of the data retained by the grid cells collection. The CellFormatting event can also be used to transform values as they are presented in a cell to something different than the value that is actually stored in the data that sits behind the grid.