DateTimePicker类更改范围

Question

我有一个要求设置一个C＃DateTimePicker控制范围内更改，我希望它只显示小时：分钟：第二，我希望最小值为10秒。

E.g.

if hour == 0 && min == 0 
     then second should be limited to change within 10 ~ 59 
     else second can change within 0 ~ 59 

我该怎么做？

Answer 1

您需要将事件onValueChanged添加到datePicker控件。这是应该工作的代码。此代码适用于获胜形式。

public Form1() 
{ 
    InitializeComponent(); 

    if (dt.Seconds % 10 > 0) 
    {    
     initialValue = true; 
     dateTimePicker1.Value = dt.Seconds (-(dt.Seconds % 10)); 
    } 

    _prevDate = dateTimePicker1.Value; 

} 


private DateTime _prevDate; 
private bool initialValue = false; 

private void dateTimePicker1_ValueChanged(object sender, EventArgs e) 
{ 
    if(initialValue) 
    { 
     initialValue = false; 
     return; 
    } 

    DateTime dt = dateTimePicker1.Value; 
    TimeSpan diff = dt - _prevDate; 

    if (diff.Ticks < 0) 
     dateTimePicker1.Value = _prevDate.AddSeconds(-10); 
    else 
     dateTimePicker1.Value = _prevDate.AddSeconds(10); 

    _prevDate = dateTimePicker1.Value; 
} 

您需要将它添加到日期选择器：

this.dateTimePicker1.CustomFormat = "dd/MM/yyyy hh:mm:ss"; 
    this.dateTimePicker1.Format = System.Windows.Forms.DateTimePickerFormat.Custom; 
    this.dateTimePicker1.ShowUpDown = true; 

Answer 2

I played a while, here is the solution: 

namespace DataTimePicker1 
{ 
    public partial class Form1 : Form 
    { 
     public Form1() 
     { 
      InitializeComponent(); 
     } 

     private void dateTimePicker1_ValueChanged(object sender, EventArgs e) 
     { 
      DateTime dt = dateTimePicker1.Value; 

      if (dt.Hour == 0 && dt.Minute == 0 && 
       dt.Second < 10) 
      { 
       int inc = 10 - dt.Second; 
       dateTimePicker1.Value = dateTimePicker1.Value.AddSeconds(inc); 
      } 
     } 
    } 
}