/C#/How to use combo box to find age in c#

How to use combo box to find age in c#

protected void btn_Click(object sender, EventArgs e)
    {
         // here you use your ddl,combobox or etc where age date is inserted
        DateTime dtStart = DateTime.Parse(txtDoB.Text);
        TimeSpan sp = DateTime.Now - dtStart;
        int year = "18";
        int days = 365;
        int total = year * days;

        if (sp.Days < total)
        {

            txtDoB.Text = "Not Valid";
            lblMess.Text = "You can not be under 18 years";
            lblMess.CssClass = "Errr";
            return;
        }
}

Similar codes

-1 vote361 views1 answer
Substring c#
C#
0 vote301 views2 answers
Get last id ef
C#
0 vote293 views1 answer
Api create in dotnet web
C#
3 votes373 views2 answers
Unity Make a 2D object look at the mouse position
C#Unity
0 vote333 views3 answers
Shell32.dll c# example
C#
0 vote300 views1 answer
Unity draw ray from one object to another
C#
0 vote325 views1 answer
Exception handling in c# web api
C#
7 votes308 views2 answers
Open url in c#
C#
0 vote311 views1 answer
Turtle graphics face in direction
C#
0 vote318 views1 answer
Unity set mouse
C#