initializing timespan variable

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C#

TimeSpan entry=AdjustTime(int row, string colName);
private TimeSpan AdjustTime(int row, string colName)
{
    string s1 = dataGridView1.Rows[row].Cells[colName].Value.ToString();
    return ((!string.IsNullOrEmpty(s1)) ? TimeSpan.Parse(s1 = (s1 == "24:00:00") ? "23:59:59" : s1) : TimeSpan.Zero);
}

in this code returned timespan value is used to determines the entry time of a person and If "s1=""" so function will return Timespan.zero.the question is, in this state how I distinguish entry is default value or person entry time is "00:00"?

Posted 13-Mar-14 7:17am

mit62

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Matt T Heffron · Accepted Answer · 2014-03-13T07:33:00

You can't directly.
You need some other indicator.
You could try using a nullable TimeSpan:

C#

TimeSpan? entry=AdjustTime(int row, string colName);
private TimeSpan? AdjustTime(int row, string colName)
{
    string s1 = dataGridView1.Rows[row].Cells[colName].Value.ToString();
    return ((!string.IsNullOrEmpty(s1)) ? TimeSpan.Parse(s1 = (s1 == "24:00:00") ? "23:59:59" : s1) : null);
}

Or you could use another impossible value for the default:

C#

TimeSpan entry=AdjustTime(int row, string colName);
private TimeSpan AdjustTime(int row, string colName)
{
    string s1 = dataGridView1.Rows[row].Cells[colName].Value.ToString();
    return ((!string.IsNullOrEmpty(s1)) ? TimeSpan.Parse(s1 = (s1 == "24:00:00") ? "23:59:59" : s1) : TimeSpan.MinValue);
}