将字符串转换为double [英] Casting a string to a double

问题描述

我正在尝试这样做：

Double myDouble

myDouble =（double）myString


我有确保myString具有有效值，即79.46。但是编译器

不会让我做演员。


如何将值输入myDouble。


谢谢，


T

I''m trying to do this:
Double myDouble
myDouble = (double) myString

I have ensured that myString has a valid value i.e. 79.46. But the compiler
won''t let me do the cast.

How can I get the value into myDouble.

Thanks,

T

推荐答案

试试这个：

myDouble = Double.Parse（）;


确保当然可以处理任何可能的错误。请查看

文件。


Tina < TI ********** @ nospammeexcite.com>在留言中写道

news：％2 ****************** @ TK2MSFTNGP02.phx.gbl ...

Try this:

myDouble = Double.Parse();

Make sure to handle any possible errors of course. look it up in
documention.

"Tina" <ti**********@nospammeexcite.com> wrote in message
news:%2******************@TK2MSFTNGP02.phx.gbl...

我正在尝试这样做：
双myDouble
myDouble =（double）myString

我确保myString有一个有效值，即79.46。但是
编译器不会让我做演员。

如何将值传入myDouble。

谢谢，

I''m trying to do this:
Double myDouble
myDouble = (double) myString

I have ensured that myString has a valid value i.e. 79.46. But the
compiler won''t let me do the cast.

How can I get the value into myDouble.

Thanks,

T

更喜欢使用double.tryparse而不是因为1.它没有扔掉

2.文化意识


-


________________________

热烈的问候，

Alvin Bruney [MVP ASP.NET]


[无耻作者插件]

专业版VSTO.NET - Wrox / Wiley

OWC使用.NET的黑皮书
www.lulu.com/owc ，亚马逊

博客： http://www.msmvps.com/ blogs / alvin

----------------------------------- --------------------


" Glen Martin" <他********* @ newsgroups.nospam>在消息中写道

新闻：uC ************** @ TK2MSFTNGP04.phx.gbl ...

prefer the use of double.tryparse instead because 1. it doesn''t throw
2. it is culture aware

--

________________________
Warm regards,
Alvin Bruney [MVP ASP.NET]

[Shameless Author plug]
Professional VSTO.NET - Wrox/Wiley
The O.W.C. Black Book with .NET
www.lulu.com/owc, Amazon
Blog: http://www.msmvps.com/blogs/alvin
-------------------------------------------------------

"Glen Martin" <He*********@newsgroups.nospam> wrote in message
news:uC**************@TK2MSFTNGP04.phx.gbl...

试试这个：

myDouble = Double.Parse（）;

确保当然可以处理任何可能的错误。在
文档中查阅。

Tina < TI ********** @ nospammeexcite.com>在消息中写道
新闻：％2 ****************** @ TK2MSFTNGP02.phx.gbl ...

Try this:

myDouble = Double.Parse();

Make sure to handle any possible errors of course. look it up in
documention.

"Tina" <ti**********@nospammeexcite.com> wrote in message
news:%2******************@TK2MSFTNGP02.phx.gbl...

我是试图这样做：
双myDouble
myDouble =（double）myString

我确保myString有一个有效值，即79.46。但是
编译器不会让我做演员。

如何将值传入myDouble。

谢谢，

T

I''m trying to do this:
Double myDouble
myDouble = (double) myString

I have ensured that myString has a valid value i.e. 79.46. But the
compiler won''t let me do the cast.

How can I get the value into myDouble.

Thanks,

T

试试这个

System.String MyString =" ; 123.456" ;;


System.Double MyDouble;


System.Boolean CanBeConverted = System.Double.TryParse（MyString，out

MyDouble）;

" Tina" < TI ********** @ nospammeexcite.com> écritdansle message de news：

％2 ****************** @ TK2MSFTNGP02.phx.gbl ...

Try this
System.String MyString = "123.456";

System.Double MyDouble;

System.Boolean CanBeConverted = System.Double.TryParse(MyString, out
MyDouble);
"Tina" <ti**********@nospammeexcite.com> a écrit dans le message de news:
%2******************@TK2MSFTNGP02.phx.gbl...

我正在尝试这样做：
Double myDouble
myDouble =（double）myString

我确保myString有一个有效值，即79.46。但是
编译器不会让我做演员。

如何将值传入myDouble。

谢谢，

T

I''m trying to do this:
Double myDouble
myDouble = (double) myString

I have ensured that myString has a valid value i.e. 79.46. But the
compiler won''t let me do the cast.

How can I get the value into myDouble.

Thanks,

T

这篇关于将字符串转换为double的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！