Question

winform中comobox 的selectedvalue不显示问题

public Xjzt()
{
InitializeComponent();
BindYear();
//BindMonth();
//BindDay();

}

protected void BindYear()
{
comboBox3.Items.Clear();
//int startYear = DateTime.Now.Year - 10;
//int currentYear = DateTime.Now.Year;
int startYear = Convert.ToInt32(DateTime.Now.Year)-10;
int currentYear = Convert.ToInt32(DateTime.Now.Year);

for (int i = startYear; i <= currentYear+10; i++)
{
comboBox3.Items.Add(i.ToString());
}
comboBox3.SelectedIndex = 10;
//comboBox3.SelectedItem = currentYear;
//comboBox3.Text = currentYear.ToString();
}
protected void BindMonth()
{

comboBox4.Items.Clear();
int currentMonth = Convert.ToInt32(DateTime.Now.Month);
for (int i = 1; i <= 12; i++)
{
comboBox4.Items.Add(i.ToString());
}

comboBox4.SelectedIndex =1;
//comboBox4.SelectedItem = currentMonth;
//comboBox4.Text = currentMonth.ToString();
}

protected void BindDay()
{
comboBox5.Items.Clear();
//string year = comboBox3.Text;
//string month = comboBox4.Text ;
string year = comboBox3.SelectedItem.ToString();
string month = comboBox4.SelectedItem.ToString();
int days = DateTime.DaysInMonth(int.Parse(year), int.Parse(month));
for (int i = 1; i <= days; i++)
{
comboBox5.Items.Add(i.ToString());
}
}
private void comboBox3_SelectedIndexChanged(object sender, EventArgs e)
{
BindDay();
}

private void comboBox4_SelectedIndexChanged(object sender, EventArgs e)
{
BindDay();
}

大家帮忙调试一下，总是出错、。、
http://zhidao.baidu.com/question/251336816.html
我在这也问了，没解决。。

Answer 1

你光说报错，报什么错？

把你的comboBox3_SelectedIndexChanged的事件换成这个就好了
或者
就在事件里添加一个BindMonth();
在你的BindDay
之前