字符串转换为双C＃ [英] Convert string to Double C#

问题描述

我在数据库字段是浮动。我的应用程序是WindowsForm。我需要的值转换格式43.27的文本框一倍。
当我这样做COnvert.ToDouble（txtbox.Text）我得到异常说输入的字符串格式错误。
如何解决这个问题，

I have a field in DB which is float. My application is WindowsForm. I need to convert the value in textbox of the format 43.27 to double. When I do this COnvert.ToDouble(txtbox.Text) I get exception saying input string is wrong format. How to rectify this issue

推荐答案

尝试解析时指定一个文化：

Try specifying a culture when parsing:

// CultureInfo.InvariantCulture would use "." as decimal separator
// which might not be the case of the current culture
// you are using in your application. So this will parse
// values using "." as separator.
double d = double.Parse(txtbox.Text, CultureInfo.InvariantCulture);

和处理错误的情况下正常，而不是抛出异常的周围，你可以使用的TryParse 方式：

And to handle the error case for gracefully instead of throwing exceptions around you could use the TryParse method:

double d;
if (double.TryParse(txtbox.Text, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out d))
{
    // TODO: use the parsed value
}
else
{
    // TODO: tell the user to enter a correct number
}

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