Question

I need to search a known column in my DataGridView and return the row containing a DateTimeobject with the closest matching time (that is less than the desired search time).

I have used linq in the past to search through a DataGridViewlooking for data. But in those cases, I was looking for an exact match, as in:

public DataGridViewRow FindRow(DataGridView dgv, string columnID, object searchID)
    {
        DataGridViewRow row = dgv.Rows
            .Cast<DataGridViewRow>()
            .Where(r => r.Cells[columnID].Value.Equals(searchID))
            .First();

        return row;
    }

Now I have an exact DateTimeobject with a column in my DataGridViewcontaining all DateTimeobjects.

DateAdded       Data1    Data2
12:34:56.012    x        y
12:34:56.345    x        y
12:34:56.678    x        y

In the above case, if I am searching for a DateTimeobject of “12:34:56.4”, I want to return the second row containing “12:34:56.345”.

I’m still familiarizing myself with linq. Anytone have any thoughts?

Answer 1

Sometimes asking the questions helps you to answer it yourself…

public DataGridViewRow FindRow(DataGridView dgv, DateTime searchID)
    {
        DataGridViewRow row = dgv.Rows
            .Cast<DataGridViewRow>()
            .Where(r => ((DateTime)r.Cells["DateAdded"].Value <= searchID))
            .Last();

        return row;
    }

This did the trick.