枚举和组合框中C＃ [英] Enums and Combo Boxes in C#

问题描述

我目前正在开发一个C＃应用程序。

I am currently developing a C# application.

我需要使用带有组合框的枚举来获取所选择的月份。我有以下创建枚举：

I need to use an enum with a combo box to get the selected month. I have the following to create the enum:

enum Months 
{ 
   January = 1,
   February,
   March,
   April,
   May,
   June,
   July,
   August,
   September,
   October,
   November,
   December 
};

然后我使用以下命令初始化组合框：

I then initialise the combobox using the following:

cboMonthFrom.Items.AddRange(Enum.GetNames(typeof(Months)));

这一段代码工作正常，但问题是当我尝试获取所选的枚举值

This bit of code works fine however the problem is when I try to get the selected enum value for the selected month

要从组合框中获取枚举值，我使用了以下内容：

To get the value the enumerator from the combo box I have used the following:

private void cboMonthFrom_SelectedIndexChanged(object sender, EventArgs) 
{
   Months selectedMonth = (Months)cboMonthFrom.SelectedItem;
   Console.WriteLine("Selected Month: " + (int)selectedMonth);
}

但是，当我尝试运行上面的代码时出现错误说出现 System.InvalidCastException 类型的第一次机会异常。

However, when I try to run the code above it comes up with an error saying A first chance exception of type System.InvalidCastException occurred.

我做错了。

感谢您提供任何帮助

推荐答案

b
$ b

Try this

Months selectedMonth = (Months)Enum.Parse(typeof(Months), cboMonthFrom.SelectedItem.ToString());

而不是

Months selectedMonth = (Months)cboMonthFrom.SelectedItem;

更新时正确更改

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