如何將列表框中選定的值分配給枚舉var？

Question

我想避免的kludginess：

private void listBoxBeltPrinters_SelectedIndexChanged(object sender, System.EventArgs e) 
{ 
    string sel = string listBoxBeltPrinters.SelectedItem.ToString(); 
    if (sel == "Zebra QL220") 
    { 
     PrintUtils.printerChoice = PrintUtils.BeltPrinterType.ZebraQL220; 
    } 
    else if (sel == "ONiel") 
    { 
     PrintUtils.printerChoice = PrintUtils.BeltPrinterType.ONiel; 
    } 
    else if (. . .) 
} 

有沒有一種方法可以讓我更優雅或雄辯地分配給基於列表框中選擇一個枚舉，是這樣的：

PrintUtils.printerChoice = listBoxBeltPrinters.SelectedItem.ToEnum(PrintUtils.BeltPrinterType)? 

？

Answer 1

你可以嘗試這樣的事情

Array values = Enum.GetValues(typeof(BeltPrinterType));//If this doesn't help in compact framework try below code 
Array values = GetBeltPrinterTypes();//this should work, rest all same 
foreach (var item in values) 
{ 
    listbox.Items.Add(item); 
} 

private static BeltPrinterType[] GetBeltPrinterTypes() 
{ 
    FieldInfo[] fi = typeof(BeltPrinterType).GetFields(BindingFlags.Static | BindingFlags.Public); 
    BeltPrinterType[] values = new BeltPrinterType[fi.Length]; 
    for (int i = 0; i < fi.Length; i++) 
    { 
     values[i] = (BeltPrinterType)fi[i].GetValue(null); 
    } 
    return values; 
    } 

private void listBoxBeltPrinters_SelectedIndexChanged(object sender, System.EventArgs e) 
{ 
    if(!(listBoxBeltPrinters.SelectedItem is BeltPrinterType)) 
    { 
     return; 
    } 
    PrintUtils.printerChoice = (BeltPrinterType)listBoxBeltPrinters.SelectedItem; 
} 

Answer 2

使用Enum.Parse可以將字符串轉換爲Enum。

PrintUtils.printerChoice = (PrintUtils.BeltPrinterType)Enum.Parse(typeof(PrintUtils.BeltPrinterType),listBoxeltPrinters.SelectedItem); 

也有是方法Enum.TryParse返回指示布爾如果解析成功時。