C＃中的枚举和组合框 [英] Enums and ComboBoxes in C#

问题描述

我目前正在开发C＃应用程序。

I am currently developing a C# application.

我需要使用带有ComboBox的枚举来获取选定的月份。我用以下方法创建枚举：

I need to use an Enum with a ComboBox 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ComboBox：

I then initialise the ComboBox using the following:

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

这段代码可以正常工作，但是问题是当我尝试获取所选的Enum值时

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

要从组合框获取枚举值，我使用了以下内容：

To get the Enum value from the ComboBox 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会出现错误说发生类型为'System.InvalidCastException'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。

感谢您可以提供的任何帮助

Thanks for any help you can provide

推荐答案

尝试一下

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

而不是

Months selectedMonth = (Months)cboMonthFrom.SelectedItem;

已进行了正确的更改

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