WinForm的结合单选按钮 [英] WinForm binding radio button

问题描述

我用VS2010，然后拖放会员datagridview的设计视图。
之后，我拖放名成员文本框设计视图，然后尝试编辑和保存。这是正常工作。

I use VS2010 and then drag and drop Member datagridview to design view. After that I drag and drop name member textfield to design view and then try to edit and save. It's work properly.

然后我拖放性别单选按钮设计视图。但结合简化版，它的工作。

And then I drag and drop sex radio button to design view. But binding it does't work.

我怎么能在这种情况下绑定？

How can I binding in this situation?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Test7
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void memberBindingNavigatorSaveItem_Click(object sender, EventArgs e)
        {
            this.Validate();
            this.memberBindingSource.EndEdit();
            this.tableAdapterManager.UpdateAll(this.dbDataSet);

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'dbDataSet.Member' table. You can move, or remove it, as needed.
            this.memberTableAdapter.Fill(this.dbDataSet.Member);
            // TODO: This line of code loads data into the 'dbDataSet.Member' table. You can move, or remove it, as needed.
            this.memberTableAdapter.Fill(this.dbDataSet.Member);

        }


        private void memberBindingNavigatorSaveItem_Click_1(object sender, EventArgs e)
        {
            this.Validate();
            this.memberBindingSource.EndEdit();
            this.tableAdapterManager.UpdateAll(this.dbDataSet);

        }
    }
}

推荐答案

下面是两种可能的解决方案。

Here are two possible solutions.

绑定格式化和分析事件

绑定类有关于即时绑定数据的转换中的形式内置工具的< A HREF =http://msdn.microsoft.com/en-us/library/system.windows.forms.binding.format.aspx相对=nofollow>格式和的解析事件

The Binding class has a built-in facility for on-the-fly transformations of bound data in the form of the Format and Parse events.

下面是你将如何使用这些事件只有男性单选按钮。在代码中创建绑定，而不是在设计师：

Here's how you would use those events with just the "Male" radiobutton. Create the binding in code, not in the designer:

// create binding between "Sex" property and RadioButton.Checked property
var maleBinding = new Binding("Checked", bindingSource1, "Sex");
// when Formatting (reading from datasource), return true for M, else false
maleBinding.Format += (s, args) => args.Value = ((string)args.Value) == "M";
// when Parsing (writing to datasource), return "M" for true, else "F"
maleBinding.Parse += (s, args) => args.Value = (bool)args.Value ? "M" : "F";
// add the binding
maleRb.DataBindings.Add(maleBinding);

// you don't need to bind the Female radiobutton, just make it do the opposite
// of Male by handling the CheckedChanged event on Male:
maleRb.CheckedChanged += (s, args) => femaleRb.Checked = !maleRb.Checked;

---

计算属性

另一种方法是将计算的属性添加到您的数据源：

Another approach is to add a computed property to your datasource:

public bool IsMale
{ 
    get { return Sex == "M"; }
    set 
    {  
        if (value)
            Sex = "M";
        else
            Sex = "F";
    }
}

现在你可以简单地将男单选按钮绑定到这个属性。在你的数据源（只是不显示在网格中该属性）

Now you can simply bind the Male radiobutton to this property on your datasource (just don't show this property in the grid).

和你可以再次女钩到男像这样：

And again you can hook up Female to Male like so:

maleRb.CheckedChanged += (s, args) => femaleRb.Checked = !maleRb.Checked;

这篇关于WinForm的结合单选按钮的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！