在vb.net中需要有关浮点数的帮助 [英] need help in vb.net about float number

问题描述

大家好，我正在使用vb.net 2008构建一个下载器，所有东西都运行良好

但我的问题是当我尝试以MB显示文件大小我不能显示点之前的位数，例如我想在结果中的点之前仅显示4位数作为3.1234而不是3.12345677

我在项目中用于将字节转换为MB的代码如下：

 Label1.Text =（（e.TotalBytesToReceive /  1024 ）/  1024 ）&   MB 

希望有人会帮助我..提前感谢：）

解决方案

尝试格式化这样的金额;

< pre lang =vb> Label1.Text = 字符串 .Format（ {0：###，## 0.0000} MB，（e.TotalBytesToReceive / 1024 。 0 ）/ 1024 。 0 ））

希望这会有所帮助，

Fredrik

感谢所有人试图帮助我..解决方案代码：

 Label1.Text = 字符串 .Format（  {0}，（（（e.TotalBytesToReceive /  1024 ）/  1024 ））。ToString（  F04））&   MB 
 

:)感谢@wes Aday并感谢@Fredrik Bornander尝试帮助我：）

Hi all , i'm building a downloader using vb.net 2008 , all things is working good
but what my problem is when i try to show the file size in MB i can't show the number of digits before the dot , for example i want to show only 4 digits before the dot in the result as 3.1234 and not as 3.12345677
the code i use to convert bytes to MB in my project is as :

Label1.Text = ((e.TotalBytesToReceive / 1024) / 1024) & "MB"

hope some one will help me .. thanks in advance :)

解决方案

Try formatting the amount like this;

Label1.Text = String.Format("{0:###,##0.0000}MB", (e.TotalBytesToReceive / 1024.0) / 1024.0))

Hope this helps,
Fredrik

thanks for all for trying to help me .. the solution code :

Label1.Text = String.Format("{0}", (((e.TotalBytesToReceive / 1024) / 1024)).ToString("F04")) & "MB"

:) thanks @wes Aday and thanks @Fredrik Bornander for trying helping me :)

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