Datagridview Formatting issue on loading

Question

I have used the following code on my customdatagridview , but found out that it is not working properly

  public partial class Paymentdatagridview : DataGridView
    {
              
        public Paymentdatagridview()
        {
            
            // i have set enableheadervisualstyles to false 
            // make bold the headers
            // Add the columns to your custom DataGridView
            DataGridViewColumn column1 = new DataGridViewTextBoxColumn();
            column1.Name = "Column1";
            column1.HeaderText = "Particulars";
            column1.AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells;
            column1.SortMode = DataGridViewColumnSortMode.Automatic;
            this.Columns.Add(column1);

            DataGridViewColumn column2 = new DataGridViewTextBoxColumn();
            column2.Name = "Column2";
            column2.HeaderText = "Amount";
            column2.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
            column2.SortMode = DataGridViewColumnSortMode.Programmatic;
            this.Columns.Add(column2);

            this.AllowUserToAddRows = true;
            this.RowHeadersVisible = false;
            this.ColumnHeadersDefaultCellStyle.Font = new Font("Tahoma", 9.75F, FontStyle.Bold);
            this.CellBorderStyle = DataGridViewCellBorderStyle.None;        

            InitializeComponent();
        }

Above is the image when it is loaded

below is the image when i starts working in it

There are multiple issues in the above

1. I have used the following code

so that the backgroundcolour of datagridview should be same as of the parent but when the datagridview loads , i found out that the backgroundcolor of datagridview of first row is different.

1. after i starts working in it . the initial white color continues to take over the new rows and so on .
2. after i starts working in it . the initial white color continues to take over the new rows and so on .
3. I am trying to set the font to be bold but it is also not working for 1st row .

 protected override void OnParentChanged(EventArgs e)     
   {         
   base.OnParentChanged(e);      
               if (this.Parent != null)     
       {           
     this.BackgroundColor = this.Parent.BackColor;     
       }     
   }

Answer 1

Hi @rahul kumar , Welcome to Microsoft Q&A.

Regarding the background color of the cell you need to set it separately:

protected override void OnParentChanged(EventArgs e)
{
    base.OnParentChanged(e);
    if (this.Parent != null)
    {
        this.BackgroundColor = this.Parent.BackColor;
        this.DefaultCellStyle.BackColor = this.Parent.BackColor;
    }
}

Regarding the bolding of key information lines, you may be using some kind of wrong method. According to the previous code, you can modify the font of the current row when adding a new row.

protected override void OnCellValueChanged(DataGridViewCellEventArgs e)
{
    base.OnCellValueChanged(e);

    if (this.SelectedCells.Count > 0)
    {

        DataGridViewCell selectedCell = this.SelectedCells[0];

        if (selectedCell.ColumnIndex == 1 && (selectedCell.RowIndex % 3 == 0))
        {
            string name = this.Rows[selectedCell.RowIndex].Cells[0].Value.ToString();
            string price = selectedCell.Value.ToString();
            // Set current row's font style
            this.Rows[selectedCell.RowIndex].DefaultCellStyle.Font = new Font(this.DefaultCellStyle.Font, FontStyle.Bold);

            if (this.Rows[selectedCell.RowIndex + 1].IsNewRow)
            {
                DataGridViewRow row1 = new DataGridViewRow();
                row1.CreateCells(this, $"Cur Bal:{name} Dr", "");

                DataGridViewRow row2 = new DataGridViewRow();
                row2.CreateCells(this, "On Account", $"{price} cr");

                this.Rows.Add(row1);
                this.Rows.Add(row2);
            }
            else
            {
                this.Rows[selectedCell.RowIndex + 2].Cells[1].Value = $"{price} cr";
            }
        }
    }
}

Best Regards,

Jiale

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