VB6中CurTimeCtl控件格式化：如何设置为24小时制显示？

Hey there! I’ve tinkered with similar custom time controls before, so let’s walk through the most practical ways to get your CurTimeCtl displaying time in 24-hour format:

1. Check the Control’s Built-in Properties (Easiest Fix) #

Most time-focused controls expose formatting settings directly in the visual designer’s properties window (like Visual Studio):

• Hunt for properties named Format, TimeFormat, or DisplayMode.
• If there’s a dropdown, select "24-hour" mode directly, or pick "Custom" to define your own string.
• For custom mode, use the format string HH:mm:ss — note that HH is for 24-hour hours (hh would trigger 12-hour format with AM/PM).

2. Set the Format Programmatically #

If the properties window doesn’t have the option you need, you can define the format directly in your code when the form/control initializes:

Example (C#): #

// Assuming your control instance is named curTimeCtl1
curTimeCtl1.Format = DateTimeFormat.Custom;
curTimeCtl1.CustomFormat = "HH:mm:ss";
// Optional: Disable system format override if the control defaults to regional settings
curTimeCtl1.UseSystemFormat = false;

Example (VB.NET): #

' Assuming your control instance is named curTimeCtl1
curTimeCtl1.Format = DateTimeFormat.Custom
curTimeCtl1.CustomFormat = "HH:mm:ss"
' Optional: Disable system format override if the control defaults to regional settings
curTimeCtl1.UseSystemFormat = False

3. Override the Control’s Display Logic (Fallback) #

If the above methods don’t work (some custom controls lock down formatting), you can hook into the control’s events to manually format the time:

• Handle the Paint or TextChanged event.
• Fetch the current time, format it to a 24-hour string, and set the control’s text directly (or draw it yourself in the Paint event).

For example, in C#:

private void curTimeCtl1_TextChanged(object sender, EventArgs e)
{
    var currentTime = DateTime.Now;
    curTimeCtl1.Text = currentTime.ToString("HH:mm:ss");
}

Just make sure to disable any automatic text-updating setting the control might have, so your custom format doesn’t get overwritten.

内容的提问来源于stack exchange，提问作者Obfuscated