要求：文本框中能手动输入数字，向上箭头根据鼠标位置给年月日递增，向下箭头递减
一：页面加载时：
private void FlatDatePicker_Load(object sender, EventArgs e)
{
txtMain.Text = DateTime.Now.ToString("MM/dd/yyyy");
txtMain.Location = new Point(,);
txtMain.Width = ;
btnUp.Width = ;
btnUp.Height = txtMain.Height / ;
btnDown.Width = ;
btnDown.Height = txtMain.Height / ;
this.Width = txtMain.Width + ;
this.Height = txtMain.Height;
btnUp.Location = new Point(txtMain.Width, );
btnDown.Location = new Point(txtMain.Width, btnUp.Height);
}
二、按下Delete键时不允许删除"/"
private void txtMain_KeyDown(object sender, KeyEventArgs e)
{
switch (e.KeyCode)
{
//不允许Delete键删除'/'
case Keys.Delete:
int selectIndex = txtMain.SelectionStart;
int selectLength = txtMain.SelectionLength;
int xiegangIndex1 = txtMain.Text.IndexOf('/');
int xiegangIndex2 = txtMain.Text.LastIndexOf('/');
bool condition1 = selectLength == 0 && (selectIndex == xiegangIndex1 || selectIndex == xiegangIndex2);
bool condition2 = selectLength > 0 && txtMain.Text.Substring(selectIndex, selectLength).Contains("/");
if (condition1 || condition2)
{
e.Handled = true;
}
break;
default:
break;
}
}
三、按下键时排除不合适字符
private void txtMain_KeyPress(object sender, KeyPressEventArgs e)
{
#region 不合适字符
if (!Char.IsNumber(e.KeyChar) && !Char.IsPunctuation(e.KeyChar) && !Char.IsControl(e.KeyChar))
{
e.Handled = true;//消除不合适字符
}
else if (Char.IsPunctuation(e.KeyChar))
{
if (e.KeyChar != '.' || this.Text.Length == )//小数点
{
e.Handled = true;
}
if (this.Text.LastIndexOf('.') != -)
{
e.Handled = true;
}
}
else if (txtMain.Text == "")
{
e.Handled = true;
}
#endregion
#region 按下数字键 数字超过指定的年月日则无效
if (Char.IsNumber(e.KeyChar))//按下数字键
{
int selectedIndex = txtMain.SelectionStart;
int selectedLength = txtMain.SelectionLength;
int monthLength = txtMain.Text.Split('/')[].Length;
int dayLength = txtMain.Text.Split('/')[].Length;
int yearLength = txtMain.Text.Split('/')[].Length;
int monthIndex = txtMain.Text.IndexOf('/', , );
int dayIndex = txtMain.Text.IndexOf('/', ); int month = DateTime.Now.Month;
int day = DateTime.Now.Day;
int year = DateTime.Now.Year;
if (txtMain.SelectedText.Contains("/"))
{
e.Handled = true;
}
else if (selectedIndex <= monthIndex)
{//修改月份
#region 修改月份
if (selectedIndex == )
{
if (selectedLength == )
{
if (monthLength == )
{
int.TryParse(e.KeyChar.ToString() + txtMain.Text.Substring(, ), out month);
}
else if (monthLength == )
{
e.Handled = true;
}
}
else if (selectedLength == )
{
if (monthLength == )
{
int.TryParse(e.KeyChar.ToString(), out month);
}
else if (monthLength == )
{
int.TryParse(e.KeyChar.ToString() + txtMain.Text.Substring(, ), out month);
}
}
else if (selectedLength == )
{
int.TryParse(e.KeyChar.ToString(), out month);
}
}
else if (selectedIndex == )
{
if (selectedLength == )
{
if (monthLength == )
{
int.TryParse(txtMain.Text.Substring(, ) + e.KeyChar.ToString(), out month);
}
else if (monthLength == )
{
e.Handled = true;
}
}
else if (selectedLength == )
{
int.TryParse(txtMain.Text.Substring(, ) + e.KeyChar.ToString(), out month);
}
}
else if (selectedIndex == )
{
e.Handled = true;
} if (month <= || month >= )
{
e.Handled = true;
}
#endregion
}
else if (selectedIndex <= dayIndex)
{//修改日期
#region 修改日期
if (selectedIndex == )
{
if (selectedLength == )
{
if (dayLength == )
{
int.TryParse(e.KeyChar.ToString() + txtMain.Text.Substring(, ), out day);
}
else if (dayLength == )
{
e.Handled = true;
}
}
else if (selectedLength == )
{
if (dayLength == )
{
int.TryParse(e.KeyChar.ToString(), out day);
}
else if (dayLength == )
{
int.TryParse(e.KeyChar.ToString() + txtMain.Text.Substring(, ), out day);
}
}
else if (selectedLength == )
{
int.TryParse(e.KeyChar.ToString(), out day);
}
}
else if (selectedIndex == )
{
if (selectedLength == )
{
if (dayLength == )
{
int.TryParse(txtMain.Text.Substring(, ) + e.KeyChar.ToString(), out day);
}
else if (dayLength == )
{
e.Handled = true;
}
}
else if (selectedLength == )
{
int.TryParse(txtMain.Text.Substring(, ) + e.KeyChar.ToString(), out day);
}
}
else if (selectedIndex == )
{
e.Handled = true;
} int.TryParse(txtMain.Text.Split('/')[], out month);
int.TryParse(txtMain.Text.Split('/')[], out year);
if ((month == || month == || month == || month == || month == || month == || month == ) && day > )
{
e.Handled = true;
}
else if ((month == || month == || month == || month == ) && day > )
{
e.Handled = true;
}
if (DateTime.IsLeapYear(year) && month == && day > )
{
e.Handled = true;
}
else if (!DateTime.IsLeapYear(year) && month == && day > )
{
e.Handled = true;
}
#endregion
}
else
{//修改年份
#region 修改年份
if (yearLength == )
{
int.TryParse(txtMain.Text.Substring(, ) + e.KeyChar.ToString(), out year);
if (year < )
{
e.Handled = true;
//txtMain.Text = txtMain.Text.Split('/')[0] + "/" + txtMain.Text.Split('/')[1] + "/" + DateTime.Now.Year;
}
}
else if (yearLength > && selectedLength <= )
{
e.Handled = true;
}
#endregion
}
}
#endregion
#region 按下BackSpcae键 不允许删除"/"
if (e.KeyChar == '\b')
{
int selectIndex = txtMain.SelectionStart;
int selectlength = txtMain.SelectionLength;
if (selectlength == && selectIndex > )
{
string delStr = txtMain.Text.Substring(selectIndex - , );
if (delStr == "/")
{
e.Handled = true;
}
}
if (selectlength > )
{
string delStr = txtMain.Text.Substring(selectIndex, selectlength);
if (delStr.Contains("/"))
{
e.Handled = true;
}
}
}
#endregion
}
四、
private void txtMain_KeyUp(object sender, KeyEventArgs e)
{
int selectIndex = txtMain.SelectionStart;
int month = ;
int.TryParse(txtMain.Text.Split('/')[], out month);
int day = ;
int.TryParse(txtMain.Text.Split('/')[], out day);
int year = ;
int.TryParse(txtMain.Text.Split('/')[], out year);
int xiegangIndex1 = txtMain.Text.IndexOf('/');//第一个'/'的位置
int xiegangIndex2 = txtMain.Text.LastIndexOf('/');//第二个'/'的位置
switch (e.KeyCode)
{
#region 松开左右键
case Keys.Left:
if (selectIndex <= xiegangIndex1)
{
FillDay();
Fillyear();
}
else if (selectIndex <= xiegangIndex2)
{
FillMonth();
Fillyear();
}
else
{
FillMonth();
FillDay();
}
txtMain.SelectionStart = selectIndex;
break;
case Keys.Right:
if (selectIndex <= xiegangIndex1)
{
FillDay();
Fillyear();
}
else if (selectIndex <= xiegangIndex2)
{
FillMonth();
Fillyear();
}
else
{
FillMonth();
FillDay();
}
break;
#endregion
case Keys.End:
break;
case Keys.Home:
break;
#region 上下键增减年月日
case Keys.Up:
selectIndex++;
if (selectIndex < )
{
if (month < )
{
month++;
FillMonth(month);
}
txtMain.Select(, );
}
else if (selectIndex < )
{
bool condition1 = (month == || month == || month == || month == || month == || month == || month == ) && day < ;
bool condition2 = (month == || month == || month == || month == ) && day < ;
bool condition3 = month == && (DateTime.IsLeapYear(year) && day < || !DateTime.IsLeapYear(year) && day < );
if (condition1 || condition2 || condition3)
{
day++;
FillDay(day);
}
txtMain.Select(, );
}
else
{
if (year < )
{
year++;
Fillyear(year);
}
txtMain.Select(, );
}
break;
case Keys.Down:
selectIndex--;
if (selectIndex < )
{
if (month > )
{
month--;
FillMonth(month);
}
txtMain.SelectionStart = ;
txtMain.Select(, );
}
else if (selectIndex < )
{
if (day > )
{
day--;
FillDay(day);
}
txtMain.SelectionStart = ;
txtMain.Select(, );
}
else
{
if (year > )
{
year--;
Fillyear(year);
}
txtMain.SelectionStart = ;
txtMain.Select(, );
}
break;
#endregion
case Keys.Delete:
break;
#region 松开数字键
case Keys.D0:
case Keys.D1:
case Keys.D2:
case Keys.D3:
case Keys.D4:
case Keys.D5:
case Keys.D6:
case Keys.D7:
case Keys.D8:
case Keys.D9:
case Keys.NumPad0:
case Keys.NumPad1:
case Keys.NumPad2:
case Keys.NumPad3:
case Keys.NumPad4:
case Keys.NumPad5:
case Keys.NumPad6:
case Keys.NumPad7:
case Keys.NumPad8:
case Keys.NumPad9:
if ((month > || selectIndex > ) && txtMain.Text.Split('/')[].Length < || (selectIndex == && txtMain.Text.Split('/')[].Length == ))
{
EidtDay(month);
FillMonth();
txtMain.Select(, );
} if ((month == && day > || month != && day > || (selectIndex < || selectIndex > )) && txtMain.Text.Split('/')[].Length < || (selectIndex == && txtMain.Text.Split('/')[].Length == ))
{
FillDay();
txtMain.Select(, );
} if (selectIndex > && txtMain.Text.Split('/')[].Length >= )
{
EidtDay(month, year);
Fillyear();
}
break;
#endregion
default:
break;
}
}
五、
private void txtMain_Leave(object sender, EventArgs e)
{
FillMonth();
FillDay();
Fillyear();
}
六、
private void txtMain_MouseDown(object sender, MouseEventArgs e)
{
FillMonth();
FillDay();
Fillyear();
}
七、
private void btnUp_Click(object sender, EventArgs e)
{
int selectIndex = txtMain.SelectionStart;
int month = ;
int.TryParse(txtMain.Text.Split('/')[], out month);
int day = ;
int.TryParse(txtMain.Text.Split('/')[], out day);
int year = ;
int.TryParse(txtMain.Text.Split('/')[], out year);
if (selectIndex < )
{
if (month < )
{
month++;
FillMonth(month);
}
txtMain.Select();
txtMain.Select(, );
}
else if ( <= selectIndex && selectIndex < )
{
bool condition1 = (month == || month == || month == || month == || month == || month == || month == ) && day < ;
bool condition2 = (month == || month == || month == || month == ) && day < ;
bool condition3 = month == && (DateTime.IsLeapYear(year) && day < || !DateTime.IsLeapYear(year) && day < );
if (condition1 || condition2 || condition3)
{
day++;
FillDay(day);
}
txtMain.Select();
txtMain.Select(, );
}
else if (selectIndex >= )
{
if (year < )
{
year++;
Fillyear(year);
}
txtMain.Select();
txtMain.Select(, );
}
}
private void btnDown_Click(object sender, EventArgs e)
{
int selectIndex = txtMain.SelectionStart;
int month = ;
int.TryParse(txtMain.Text.Split('/')[], out month);
int day = ;
int.TryParse(txtMain.Text.Split('/')[], out day);
int year = ;
int.TryParse(txtMain.Text.Split('/')[], out year);
if (selectIndex < )
{
if (month > )
{
month--;
FillMonth(month);
}
txtMain.Select();
txtMain.Select(, );
}
else if ( <= selectIndex && selectIndex < )
{
if (day > )
{
day--;
FillDay(day);
}
txtMain.Select();
txtMain.Select(, );
}
else if (selectIndex >= )
{
if (year > )
{
year--;
Fillyear(year);
}
txtMain.Select();
txtMain.Select(, );
}
}
八、
private bool Fillyear(int year = )
{
bool editBool = false;
if (year == )
{
int.TryParse(txtMain.Text.Split('/')[], out year);
if (year == )
{
year = DateTime.Now.Year;
editBool = true;
}
}
if (year < && year > )
{
txtMain.Text = txtMain.Text.Split('/')[] + "/" + txtMain.Text.Split('/')[] + "/" + DateTime.Now.Year;
editBool = true;
}
else
{
txtMain.Text = txtMain.Text.Split('/')[] + "/" + txtMain.Text.Split('/')[] + "/" + year;
editBool = true;
}
return editBool;
//txtMain.Select(0, 2);
} private bool FillMonth(int month = )
{
bool editBool = false;
if (month == )
{
int.TryParse(txtMain.Text.Split('/')[], out month);//txtMain.Text.Substring(0, 2)
if (month == )
{
month = DateTime.Now.Month;
editBool = true;
}
}
if ( >= month && month > )
{
txtMain.Text = "" + month.ToString() + "/" + txtMain.Text.Split('/')[] + "/" + txtMain.Text.Split('/')[];
editBool = true;
}
else
{
txtMain.Text = month + "/" + txtMain.Text.Split('/')[] + "/" + txtMain.Text.Split('/')[];
editBool = true;
}
return editBool;
//txtMain.Select(3, 2);
} private bool FillDay(int day = )
{
bool editBool = false;
if (day == )
{
int.TryParse(txtMain.Text.Split('/')[], out day);//txtMain.Text.Substring(0, 2)
if (day == )
{
day = DateTime.Now.Day;
editBool = true;
}
}
if ( >= day && day > )
{
txtMain.Text = txtMain.Text.Split('/')[] + "/" + "" + day.ToString() + "/" + txtMain.Text.Split('/')[];
editBool = true;
}
else
{
txtMain.Text = txtMain.Text.Split('/')[] + "/" + day.ToString() + "/" + txtMain.Text.Split('/')[];
editBool = true;
}
return editBool;
//txtMain.Select(6, 4);
}
九、
/// <summary>
/// 根据年月判断日期是否超出范围 是则修改
/// </summary>
private void EidtDay(int month = , int year = )
{
if (month == )
{
int.TryParse(txtMain.Text.Split('/')[], out month);
}
int day = ;
int.TryParse(txtMain.Text.Split('/')[], out day);
if (year == )
{
int.TryParse(txtMain.Text.Split('/')[], out year);
}
if (month == )
{
month = DateTime.Now.Month;
}
if (day == )
{
day = DateTime.Now.Day;
}
if (year == )
{
year = DateTime.Now.Year;
}
if ((month == || month == || month == || month == ) && day > )
{
if (month < )
{
txtMain.Text = "" + month + "/30/" + year;
}
else
{
txtMain.Text = month + "/30/" + year;
}
}
if (DateTime.IsLeapYear(year) && month == && day > )
{
txtMain.Text = "" + month + "/29/" + year;
}
if (!DateTime.IsLeapYear(year) && month == && day > )
{
txtMain.Text = "" + month + "/28/" + year;
}
}