DataGridView Cell Alignment Won't Work

问题

I have a DataGridView that I use in a C# Winforms project. The grid does NOT autogenerate columns. I have manually set the column names and properties.

This includes the DefaultCellStyle for the cells. I want all cells that are of type DataGridViewCheckBoxColumn to be aligned centered. I have manually set this alignment for each column of this type in the designer. These changes do not show up when the datagridview is loaded.

As my next approach, I used the code below in the DataBindingComplete event (which also had no effect)

foreach (DataGridViewColumn dgvc in this.dgv_Automations.Columns)
{
    if(dgvc.CellType == typeof(DataGridViewCheckBoxCell))
        dgvc.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;
}

When debugging, the above code already had the alignment set the center. However, it still does not show up on the grid.

I CAN get it working if during the DataBindingComplete event I do something like this:

foreach (DataGridViewRow dgvr in this.dgv_Automations.Rows)
{
    dgvr.Cells["isErrors"].Style.Alignment = DataGridViewContentAlignment.MiddleCenter;
}

However, I have many of these columns and it really doesn't make sense to do it this way. EDIT: I have implemented it this way and with only about 10 rows there is very noticeable lag from setting this property on each cell.

My question is: what is the proper way of doing this? Why does the designer DefaultCellStyle not work?

回答1:

According to MSDN the DefaultCellStyle of a DataGridViewColumn is overridden by the styles specified through the DataGridView.RowsDefaultCellStyle, DataGridView.AlternatingRowsDefaultCellStyle, DataGridViewRow.DefaultCellStyle, and DataGridViewCell.Style properties.
So it's possibile that one of these styles are set to a value incompatible with your required alignment (for example DataGridViewContentAlignment.NotSet or DataGridViewContentAlignment.TopLeft)