数据绑定到单选按钮（组）

Question

I'm trying to somehow bind an entity field(?) to a radio button.

Perhaps an example:

I have a groupbox with two radio buttons in it: Toss Won and Toss Lost. I have a database field called TossWon. What I want to happen, is when Toss Won is Checked, then TossWon should be 1 (ie true). When Toss Lost is Checked, TossWon should be false.

How can I do this? Should I be binding to some property of the groupbox (don't think so), or to one or both of the radio buttons?

I know I can use events, but I'm wondering if there is a 'better' way.

Answer 1

避免事件的优雅解决方案是在数据库中添加计算字段TossLost= NOT(TossWon) 。

Answer 2

Data bind TossWon to both radio buttons.

Then handling the Binding.Parse / Binding.Format event of the radio buttons

// Displaying data, true if data is 1 else false
rdoTossWin.DataBindings[0].Parse += (sender, e) => e.Value = ((int)e.Value) == 1;
// Change the true to 1 and false to 0
rdoTossWin.DataBindings[0].Format += (sender, e) => e.Value = (bool)e.Value ? 1 : 0;

Answer 3

As HubertL pointed out, only one filed suffices. You should put both radio buttons in a groupbox so that checking one causes the other one be unchecked without writing any code. The you can simply bind property TossWon to Checked property of rdTossWin :

rdTossWin.DataBindings.Add("Checked", yourDataSource,"TossWin");