Question

In my TimeIn.aspx File, I am displaying clock with following code:

<div>
    <div>
        <asp:ScriptManager runat="server" ID="ScriptManager1" />
        <br />

        <asp:UpdatePanel runat="server" ID="UpdatePanel1">
            <ContentTemplate>
                <asp:Label runat="server" ID="Label4" Text="Current Time: "/>
                <asp:Label runat="server" ID="Label2" />
            </ContentTemplate>
            <Triggers>
                <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
            </Triggers>
        </asp:UpdatePanel>
        <asp:Timer ID="Timer1" runat="server" OnTick="Timer1_Tick" Interval="1000" />
    </div>
    <br />

    <br />
    <asp:Button ID="Button1" runat="server" Text="Check In" OnClick="CheckIn" />
</div>

The clock works fine. Then in TimeIn.aspx.cs file, I have written CheckIn method:

protected void CheckIn(object sender, EventArgs e)
{
    TimeSpan currtime = TimeSpan.Parse(Label2.Text);
    int eid = Convert.ToInt32(Session["EID"]);
    DBClient = new DBConnection();
    DBClient.CheckIn(eid, currtime, DateTime.Now.Date.ToString());
    Response.Redirect("ECheckin.aspx");
}

In Database, the Datatype of CheckinTime column is Time(7).
When CheckIn event fires it gives exception on first line of TimeSpan.Parse because Label2.Text have time with time format added (AM/PM).
Sample value of Label2.Text is: 1:41:28 PM
Whats the best solution to deal with this situation? I really want to use Time datatype in sql server because later i will have to perform calculations on time field.

Answer 1

Timespan is basically difference between two times.

Or we can say a stopwatch where value in stopwatch is time that have elapsed since when clock started and when clock stopped.

It has nothing to do with AM or PM.

Timespan = Date1 - Date2

I guess the error that you are getting will be FormatException

Your format of Label Text is DateTime that’s why AM/PM.

Instead of Timespan try using DateTime instance

like

DateTime currtime = DateTime.Parse(Label2.Text);