c# - 将字符串转换为十进制时出现 System.FormatException : Input string was not in a correct format ,。

Question

我在使用 ASP.NET 和 C# 时遇到了一点问题。这是我的错误代码:

An exception of type 'System.FormatException' occurred in mscorlib.dll but was not handled in >user code

Additional information: Input string was not in a correct format.

protected void Page_Load(object sender, EventArgs e)
{
    if(this.IsPostBack == false)
    {
        Currency.Items.Add(new ListItem("Euro", "0.85"));
        Currency.Items.Add(new ListItem("Yen", "11.30"));
        Currency.Items.Add(new ListItem("PLN", "4.20"));
        Currency.Items.Add(new ListItem("GBP", "5.62"));
    }
}

protected void Convert_Click(object sender, EventArgs e)
{
    decimal oldAmount;
    bool succes = Decimal.TryParse(TextBox.Value, out oldAmount);

    if(succes)
    {
        ListItem item = Currency.Items[Currency.SelectedIndex];
        decimal newAmount = oldAmount * decimal.Parse(item.Value);
        Result.InnerText = "Result: " + newAmount;
    }

}

我尝试了 Decimal.Parse、Decimal.TryParse 和其他奇怪的组合。现在我确定问题出在字符串并将它们解析为十进制。当我创建 String 变量时 - 解析时出现了同样的错误。那么有人可以告诉我如何将字符串转换为十进制吗？

Answer 1

尝试使用“0,85”而不是“0.85”。如果你改变文化，我认为你可以使用点小数。以下是更多信息: How to change symbol for decimal point in double.ToString()?