如果textbox1，如何将label设置为visible1 = false！ =每15秒一次？ [英] How to set visible to label1 = false if textbox1 ! =null every 15 second ?

问题描述

如果textbox1！=每15秒为空，如何设置visible1 = false？

我有windows表格c＃vs2015 form1

有label1和textbox1

i需要设置label1.visible = false;从textbox1开始15秒后有价值

来解释更多

假设我打开form1并在写下michel 15秒后写入textbox1 michel

set label1 = false

可见，如果textbox1没有值，15秒后不能对label1执行可见的错误

那么请该怎么做？



我尝试过：

How to set visible to label1 = false if textbox1 !=null every 15 second ?
I have windows form c# vs2015 form1
have label1 and textbox1
i need to set label1.visible=false ; after 15 second from textbox1 have value
to explain more
suppose i open form1 and write in textbox1 michel after writing michel by 15 second
set visible to label1=false
and if textbox1 not have value not execute visible to false to label1 after 15 second
so that how to do that please ?

What I have tried:

How to set visible to label1 = false if textbox1 !=null every 15 second ?

推荐答案

在 Textbox_TextChange 事件，启动计时器事件。触发 Timer_Tick 事件时，更改标签状态。

In the Textbox_TextChange event, start a timer event. When the Timer_Tick event fires, change the label state.

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