Find the future & invalid dates and blank it on a button click

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Hi,

I have Date fields in DateGridView. On a button click, i will select the particular column to find the FUTURE and INVALID (Ex: 00/11/2000, 11/00/2001, 11/12/0000).

And blank all those. Can you please let me know the best and short process?

Posted 21-Dec-15 22:45pm

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CHill60 22-Dec-15 6:01am

What have you tried?

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CHill60 · Answer 1 · 2015-12-22T03:46:00

The process is to go through the rows one by one and check the value in that column

You can use TryParse[^] or TryParseExact[^] to check whether the date is valid or not. For dates I recommend the latter (TryParseExact) so that Culture and format does not cause issues.

C#

const int colWithDate = 0;

for (var i = 0; i < GridView1.Rows.Count; i++)
{
    if (GridView1.Rows[i].Cells[0].Value != null)
    {
        DateTime checkDate;
        if (!DateTime.TryParseExact(GridView1.Rows[i].Cells[colWithDate].Value.ToString(), "d/m/yyyy", new CultureInfo("en-GB"),DateTimeStyles.None,  out checkDate))
            GridView1.Rows[i].Cells[0].Value = "";
    }
}