如何在NumericUpDown控件中显示一个空值? [英] How to display an empty value in NumericUpDown control?

问题描述

我有一个Windows Forms应用程序，该应用程序包含NumericUpDown控件，并且Minimum和Maximum值分别设置为(50:80)和步骤1.

I have a Windows Forms application that includes NumericUpDown control With Minimum and Maximum values set to (50:80) accordingly and step 1.

加载表单时，NumericUpDown显示50.

When form loads the NumericUpDown shows 50.

我知道NumericUpDown用于选择数字和数字类型，并且始终具有值，但是有什么方法可以使它在表单加载时显示为空?

I know that NumericUpDown is for picking numbers and numeric types and always has a value, but is there any way to make it show empty when form loads?

推荐答案

您不能将默认的NumericUpDown控件设置为空. NumericUpDown需要一个值来增加/减少.如果空"只是用户最初看到表单时看起来是空的问题，则可以通过将NumericUpDown的文​​本"设置为空来对其进行破解:

You can't make default NumericUpDown control empty. NumericUpDown need a value to increase/decrease from. If 'empty' is only a matter of look empty when user see the form at first, then you can hack it by setting NumericUpDown's Text to empty:

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    NumericUpDown1.Text = ""
End Sub

NummericUpDown1会显示为空，但NumericUpDown1.Value仍为50.

With that NumericUpDown1 will look empty, but NumericUpDown1.Value is still 50.

这篇关于如何在NumericUpDown控件中显示一个空值?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！