用逗号和点接受小数点数

Question

我正在开发一个uwp应用程序,我有一个文本框,我只想接受小数,逗号或点(例如:1.5或1.5或1.50或1.50)使用在此文本框中输入的值,并在单击按钮后在应用程序中将执行操作:

double value= Convert.ToDouble(inputBox.Text);

InputBox是我的文本框,用户输入数字.如果我输入例如1,50不给出错误,并执行我想要的操作.如果我输入1.50就会出现此错误,在我提供的这行代码中:

System.FormatException was unhandled by user code
Message=Input string was not in a correct format.

Answer 1

您可以手动指定分隔符(.和,)并尝试使用以下两种格式进行分析:

string source = "123,456"; // "123.456" (with dot) will be accepted as well
double result;

if (double.TryParse(source, 
                    NumberStyles.Number, //TODO: you may want to change style
                    new NumberFormatInfo() { 
                      NumberDecimalSeparator = ".", 
                      NumberGroupSeparator = "" }, 
                    out result) ||
    double.TryParse(source, 
                    NumberStyles.Number, //TODO: you may want to change style
                    new NumberFormatInfo() { 
                      NumberDecimalSeparator = ",", 
                      NumberGroupSeparator = "" }, 
                    out result)) 
{
    // result contains parsed source value
}
else 
{
    // source is not a valid double
}