天津投入产出系统后端
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using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.ComponentModel;
public class DateTimePickerA : DateTimePicker
{
public DateTimePickerA()
: base()
{
SetNullText();
base.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Bold);
}
/// <summary>
/// 值是否已改变
/// </summary>
private bool IsValueChanged = false;
/// <summary>
/// 原格式字符串
/// </summary>
private string _formatString = "yyyy年MM月dd日";
/// <summary>
/// 原格式
/// </summary>
private DateTimePickerFormat _originalFormat = DateTimePickerFormat.Custom;
/// <summary>
/// 可空日期
/// </summary>
private DateTime? valueX = null;
/// <summary>
/// 日期(值改变前为null)
/// </summary>
[Browsable(true), Category("扩展属性"), Description("可空日期(值改变前为null)")]
public DateTime? ValueX
{
get { return valueX; }
set
{
if (value == null)
{
valueX = value;
SetNullText();
}
else
{
this.CustomFormat = FormatString;
this.Value = value.Value;
valueX = value;
}
}
}
/// <summary>
/// 格式字符串
/// </summary>
[Browsable(true), Category("扩展属性"), Description("格式字符串")]
public string FormatString
{
get { return _formatString; }
set { _formatString = value; }
}
/// <summary>
/// 设置格式
/// </summary>
[Browsable(true), Category("扩展属性"), Description("设置格式")]
public DateTimePickerFormat OriginalFormat
{
get { return _originalFormat; }
set { _originalFormat = value; }
}
/// <summary>
/// 开始时间(该日期的00:00:00)
/// </summary>
[Browsable(true), Category("扩展属性"), Description("开始时间(为当前选中日期的00:00:00)")]
public DateTime? BeginTime
{
get
{
if (ValueX.HasValue)
return DateTime.Parse(ValueX.Value.ToString("yyyy-MM-dd 00:00:00"));
else
return null;
}
}
/// <summary>
/// 结束时间(该日期的23:59:59)
/// </summary>
[Browsable(true), Category("扩展属性"), Description("结束时间(为当前选中日期的23:59:59)")]
public DateTime? EndTime
{
get
{
if (ValueX.HasValue)
{
return DateTime.Parse(ValueX.Value.ToString("yyyy-MM-dd 23:59:59"));
}
else
return null;
}
}
/// <summary>
/// 设置空字符显示
/// </summary>
private void SetNullText()
{
this.Format = System.Windows.Forms.DateTimePickerFormat.Custom;
this.CustomFormat = " ";
}
protected override void OnCloseUp(EventArgs eventargs)
{
if (IsValueChanged)
{
this.Format = _originalFormat;
this.CustomFormat = _formatString;
valueX = this.Value;
IsValueChanged = false;
}
base.OnCloseUp(eventargs);
}
protected override void OnValueChanged(EventArgs eventargs)
{
this.IsValueChanged = true;
base.OnValueChanged(eventargs);
}
protected override void OnKeyDown(KeyEventArgs e)
{
//删除时间 www.2cto.com
if (e.KeyCode == Keys.Back || e.KeyCode == Keys.Delete)
{
this.ValueX = null;
this.CustomFormat = " ";
}
base.OnKeyDown(e);
}
}