/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

0 vote185 views1 answer
Random mac address c#
C#
0 vote170 views1 answer
C# tolower all in a array
C#
0 vote254 views1 answer
Wpf get screen size
C#
-1 vote177 views1 answer
The request was aborted could not create ssl/tls secure channel. c# restsharp
C#
0 vote171 views1 answer
C# list subfolders
C#
0 vote282 views1 answer
Unity customize hierarchy window
C#Unity
0 vote161 views1 answer
C# async rethrow exception
C#
-1 vote240 views1 answer
How to fix unity crashing
C#
0 vote168 views1 answer
Do loop c#
C#
2 votes190 views10 answers
Test
C#