vb.net 如何在 Visual Studio 中将输出值设置为 2 个小数位？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/39827842/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How can I set an output value to 2 decimal places in Visual Studio?
提问by Rob P
Im putting together a basic Gross Profit Calculator in Visual Studio and need the output to show as a ￡ value, ie to 2 decimal places.
我在 Visual Studio 中组装了一个基本的毛利润计算器，并且需要将输出显示为 ￡ 值，即保留 2 个小数位。
I have tried this so far:
到目前为止我已经尝试过这个：
String.Format("{0:0.00}", TextBox3.Text = CStr(sale))
where TextBox3 is the output for the calculation. However on using this, nothing happens and the box remains empty and I can't work out why!
其中 TextBox3 是计算的输出。然而，在使用它时，没有任何反应，盒子仍然是空的，我不知道为什么！
采纳答案by sachin
Your syntax is not correct, re-write your code this way:
您的语法不正确，请按以下方式重新编写代码：
TextBox3.Text = String.Format("{0:0.00}", sale)
The String.Format's result wasn't being assigned to anything.
该String.Format的结果没有被分配到任何东西。
回答by Panagiotis Kanavos
The syntax is wrong, and besides, CStris just another way to format other types as a string. By using it you preventString.Formatfrom doing its job
语法是错误的，此外，CStr这只是将其他类型格式化为字符串的另一种方式。通过使用它，你可以阻止String.Format它的工作
I think you are looking for
我想你正在寻找
TextBox3.Text = String.Format("{0:0.00}", sale)
Furthermore, built-in numeric types override ToStringand allow custom formatting as well. If saleis a float, double or decimal, you can write:
此外，内置数字类型也覆盖ToString并允许自定义格式。如果sale是浮点数、双精度数或十进制数，则可以这样写：
TextBox3.Text = sale.ToString("0.00")
or
或者
TextBox3.Text = sale.ToString("N2")
