cell styles not working in datagridview

Question

Hi experts ,

i had used some of the code from the user here in microsoft q and A . and tried to modified it according to my requirement

  InitializeComponent();

            this.EnableHeadersVisualStyles = false;
            this.ColumnHeadersDefaultCellStyle.Font = new Font("Tahoma", 9.75F, FontStyle.Bold); // HEADER FONT BOLD 
            this.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill; // fill the blank area 
            
            this.BackgroundColor = Color.FromArgb(250, 243, 198); // extra area color 
            this.DefaultCellStyle.SelectionBackColor = Color.FromArgb(168, 201, 170); // full row select color to green
            this.RowsDefaultCellStyle.BackColor = Color.FromArgb(250, 243, 198);
// rows back color 
            this.ColumnHeadersDefaultCellStyle.BackColor = Color.FromArgb(250, 243, 198); // change back color of header cells

  protected override void OnEditingControlShowing(DataGridViewEditingControlShowingEventArgs e)
        {
            // only place where it is working 
            e.CellStyle.BackColor = Color.FromArgb(0, 0, 0); // change cell color to black 
            e.CellStyle.ForeColor = Color.FromArgb(255, 255, 255); // change cell color to white  
            Font currentFont = e.CellStyle.Font;
            Font newFont = new Font(currentFont.FontFamily, 11, currentFont.Style | FontStyle.Bold);
            e.CellStyle.Font = newFont;

           
            base.OnEditingControlShowing(e);
        }

using the above , it gives me as i expected

but when i leaves the cell , it maintains its forecolor (for the full same row ), even though i applied to code to revert back but not maintaining its bold font .

protected override void OnCellEndEdit(DataGridViewCellEventArgs e)
        {
                      
            this.CurrentCell.Style.ForeColor = Color.FromArgb(0, 0, 0);
}

but surprisingly reverts back when i leave the row

so its clear that cell leave has no effect .

I am here trying to set the forecolor of the cell back to back as soon as the editing is finished for the current cell (whichit is only changing when i changed the row .)
another thing is font issue which i want is for all the cells in all the rows and columns

i had tried multiple methods to like cell end edit , cell leave but none of them is working . Pls help in this matter .

Answer 1

Hi @ankit goel , Welcome to Microsoft Q&A,

I used your code and it didn't appear that the current grid cannot be modified. To make all cells bold just use the OnCellFormatting event. The main code examples are as follows:

using System.Drawing;
using System.Windows.Forms;

namespace _10_30_x
{
    public partial class CustomControl2 : DataGridView
    {
        public CustomControl2()
        {
            InitializeComponent();
            this.EnableHeadersVisualStyles = false;
            this.ColumnHeadersDefaultCellStyle.Font = new Font("Tahoma", 9.75F, FontStyle.Bold); // HEADER FONT BOLD 
            this.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill; // fill the blank area 

            this.BackgroundColor = Color.FromArgb(250, 243, 198); // extra area color 
            this.DefaultCellStyle.SelectionBackColor = Color.FromArgb(168, 201, 170); // full row select color to green
            this.RowsDefaultCellStyle.BackColor = Color.FromArgb(250, 243, 198);
            // rows back color 
            this.ColumnHeadersDefaultCellStyle.BackColor = Color.FromArgb(250, 243, 198); // change back color of header cells
        }

        protected override void OnPaint(PaintEventArgs pe)
        {
            base.OnPaint(pe);
        }
        protected override void OnCellFormatting(DataGridViewCellFormattingEventArgs e)
        {
            base.OnCellFormatting(e);

            if (e.Value != null && e.RowIndex >= 0 && e.ColumnIndex >= 0)
            {
                Font newFont = new Font(e.CellStyle.Font.FontFamily, 11, e.CellStyle.Font.Style | FontStyle.Bold);
                e.CellStyle.Font = newFont;
            }
        }
        protected override void OnEditingControlShowing(DataGridViewEditingControlShowingEventArgs e)
        {
            // only place where it is working 
            e.CellStyle.BackColor = Color.FromArgb(0, 0, 0); // change cell color to black 
            e.CellStyle.ForeColor = Color.FromArgb(255, 255, 255); // change cell color to white             
            base.OnEditingControlShowing(e);
        }
    }
}

Best Regards,

Jiale

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