使用标签值作为定时器间隔的值
Use label value as the value for timer interval
在 visual basic .net 中是否可以使用 label1.text 作为 timer1.interval 的值?
我尝试了以下方法,不幸的是它不起作用。
Dim Try_Interval As Integer = My.Settings.Error_Millisec
Int32.TryParse(frmSettings.Lbl_Error_Millisec_Fin.Text, Try_Interval)
它说
An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in System.Windows.Forms.dll
Additional information: Value '0' is not a valid value for Interval.
Interval must be greater than 0.
我也试过将它存储在 my.settings 中,如下面的代码
Dim Try_Max As Integer = Convert.ToDouble(My.Settings.Error_Try)
Dim Try_Interval As Integer = My.Settings.Error_Millisec
有什么建议吗?
您可以得到间隔设置如下:
Dim timerValue As Integer
Integer.TryParse(timerLabel.Text, timerValue)
Timer1.Interval = timerValue
Int32.TryParse
在可以成功解析字符串为Int32
时初始化int参数,否则为0。所以要么是因为格式不正确导致无法解析字符串,要么是"0"
。它的价值是多少?
The value frmSettings.Lbl_Error_Millisec_Fin.Text is 0, take note that
I've taken that from another form.
An Int32 specifying the number of milliseconds before the Tick event
is raised relative to the last occurrence of the Tick event. The value
cannot be less than one.
因此请指定一个值为 >= 1
。
在 visual basic .net 中是否可以使用 label1.text 作为 timer1.interval 的值?
我尝试了以下方法,不幸的是它不起作用。
Dim Try_Interval As Integer = My.Settings.Error_Millisec
Int32.TryParse(frmSettings.Lbl_Error_Millisec_Fin.Text, Try_Interval)
它说
An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in System.Windows.Forms.dll
Additional information: Value '0' is not a valid value for Interval. Interval must be greater than 0.
我也试过将它存储在 my.settings 中,如下面的代码
Dim Try_Max As Integer = Convert.ToDouble(My.Settings.Error_Try)
Dim Try_Interval As Integer = My.Settings.Error_Millisec
有什么建议吗?
您可以得到间隔设置如下:
Dim timerValue As Integer
Integer.TryParse(timerLabel.Text, timerValue)
Timer1.Interval = timerValue
Int32.TryParse
在可以成功解析字符串为Int32
时初始化int参数,否则为0。所以要么是因为格式不正确导致无法解析字符串,要么是"0"
。它的价值是多少?
The value frmSettings.Lbl_Error_Millisec_Fin.Text is 0, take note that I've taken that from another form.
An Int32 specifying the number of milliseconds before the Tick event is raised relative to the last occurrence of the Tick event. The value cannot be less than one.
因此请指定一个值为 >= 1
。