string.Format“C”（货币）返回字符串“C”而不是格式化文本(string.Format “C” (currency) is returning the string “C” instead of formatted text)

 我试图确保从TextBox派生的文本始终格式化为货币。 
 
 我已经像这样覆盖了Text属性。 
 
   public override string Text
    {
        get
        {
            return base.Text;
        }
        set
        {                
            double tempDollarAmount = 0;
            string tempVal = value.Replace("$", "").Replace(",","");
            if (double.TryParse(tempVal, out tempDollarAmount))
            {
                base.Text = string.Format("C", tempDollarAmount);
            }
            else
            {                 
                base.Text = "$0.00";
            }                
        }
    }
 
 结果： 
 
 
 
 如果传递值“文本”（AmountControl.Text =“文本”;），我的测试页上的控件的文本设置为“$ 0.00”，如预期的那样。 
 
 
 如果我传递值7（AmountControl.Text =“7”;），我希望看到“$ 7.00”，但我的测试页面上的控件文本设置为“C”。 
 
 
 我认为我错过了一些非常简单的东西。 这是关于财产的东西吗？ 或者我错误地使用了字符串格式方法？ 

I am trying to ensure that the text in my control derived from TextBox is always formatted as currency.
 
I have overridden the Text property like this.
 
   public override string Text
    {
        get
        {
            return base.Text;
        }
        set
        {                
            double tempDollarAmount = 0;
            string tempVal = value.Replace("$", "").Replace(",","");
            if (double.TryParse(tempVal, out tempDollarAmount))
            {
                base.Text = string.Format("C", tempDollarAmount);
            }
            else
            {                 
                base.Text = "$0.00";
            }                
        }
    }
 
Results:
 
 
 
If I pass the value "Text" (AmountControl.Text = "Text";) , the text of the control on my test page is set to "$0.00", as expected.
 
 
If I pass the value 7 (AmountControl.Text = "7";) , I expect to see "$7.00", but the text of the control on my test page is set to "C".
 
 
I assume that I am missing something very simple here. Is it something about the property? Or am I using the string format method incorrectly?

原文：https://stackoverflow.com/questions/484048