Adding new columns to a Winforms DataGridView via code

Question

I\'m trying to add N number of columns for each days of a given month:

var daysCount = DateTime.DaysInMonth(DateTime.Now.Year, month);

for (int i = 1; i <= d         


        

Answer 1

The problem stems from your DataGridViewColumn.CellTemplate not being set.

For this scenario a DataGridViewTextBoxCell as the CellTemplate should suffice.

       var daysCount = DateTime.DaysInMonth(DateTime.Now.Year, 1);

        for (int i = 1; i <= daysCount; i++)
        {
            dataGridView1.Columns.Add(new DataGridViewColumn() { HeaderText = i.ToString(), CellTemplate = new DataGridViewTextBoxCell() });
        }