how display the selected month date in datagridview usingc#

Question

        DateTime dt1 = dateTimePicker1.Value;
        dt1 = new DateTime(dt1.Year, dt1.Month, 1); // get first day of selected month
        DateTime dt2 = dt1.AddMonths(1); // get first day of next month
        int numDays = (dt2 - dt1).Days;

        if (dataGridView1.RowCount < numDays)
        {
            dataGridView1.RowCount = numDays;
        }

        int row = 0;

        while (dt1 < dt2)
        {
            dataGridView1.Rows[row].Cells[1].Value = dt1.ToString("dd/MM/yyyy");
            dt1 = dt1.AddDays(1);
            row++;
        }

I work out your code, but when i run i get the error as follows;

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

the above error occurs in below line as follows;

dataGridView1.Rows[row].Cells[1].Value = dt1.ToString("dd/MM/yyyy");

please help me.

Thanks & regards,
rao.

Vulpes · Answer

Well the error can't be because there are insufficient rows in the DGV because we've already made sure that the RowCount is big enough to accomodate the month being displayed. So that only leaves the column count. I'd assumed from your original post that the first column (index 0) contained checkboxes and that the second column (index 1) would contain the dates that we're generating. However if in fact there's only one column in the DGV then just change the offending line to: dataGridView1.Rows[row].Cells [0] .Value = dt1.ToString(dd/MM/yyyy);

Vulpes · Answer

Try this: DateTime dt1 = dateTimePicker1.Value; dt1 = new DateTime(dt1.Year dt1.Month 1); // get first day of selected month DateTime dt2 = dt1.AddMonths(1); // get first day of next month int numDays = (dt2 - dt1).Days; if (dataGridView1.RowCount { dataGridView1.RowCount = numDays; } int row = 0; while (dt1 { dataGridView1.Rows[row].Cells[1].Value = dt1.ToString(dd/MM/yyyy); dt1 = dt1.AddDays(1); row++; }