如何在从MYSQL时间字段检索的datagridview中将时间列显示为hh：mm tt？

Question

I am having a column LOGINTIME as TIME datatype in MYSQL.

This column has more values such as

11:59:00

11:45:34

14:22:22

I want to display this column in datagridview as 'hh:mm tt' I mean,

11:59 AM

11:45 AM

02:22 PM

Code:

dataGridView1.Columns["LOGINTIME"].DefaultCellStyle.Format = "hh:mm tt";

This is the code I used, it displays me an error.

http://postimg.org/image/fm01hhyzp/

            MessageBox.Show(dataGridView1.Columns["LOGINTIME"].ValueType.ToString());

It displays "System.TimeSpan". So how to format a TimeSpan column in datagridview as "hh:mm tt"

Answer 1

.NET accepts the TIME datatype of MYSQL as System.TimeSpan not System.DateTime.

Here you are trying to assign custom DateTime format, that why you get error as "Input string was not in a correct format".

You need to assign custom TimeSpan format, like

dataGridView1.Columns["LOGINTIME"].DefaultCellStyle.Format = @"hh\:mm";

Check this link to know more about custom TimeSpan format

https://msdn.microsoft.com/en-us/library/ee372287(v=vs.110).aspx

By default, TimeSpan doesn't support 12hr time format.

You need to convert TimeSpan to DateTime object and specify any custom DateTime format as you want.

Answer 2

检查我编辑的答案...

   dataGridView1.Rows[Index].Cells["LOGINTIME"].Value = Convert.ToDateTime(dataGridView1.Rows[Index].Cells["LOGINTIME"].Value).ToString("hh:mm tt");