How to convert file size in datagridview column value C#

Question

I`m making windows application.

In my application working process is like this

1. Write text in Text Box and click Start button

2. Matched data showed in DataGridView

And now I want to convert to file size in Datagridview column

For example, In my database, DBsize value saved in byte foramt like this : 451936256

but It`s hard to count it, So in DataGridView, I want to show convert it like this : 431MB

I showed my button click code below, How can I do that? Please help me.

Thank you

private void btnStart_Click(object sender, EventArgs e)
        {
            string webApplicationName = string.Empty;
            string siteID = string.Empty;
            mtlblError.Text = "no record returned";

            Migration_Status_DAC dac = new Migration_Status_DAC();
            DataSet ds = new DataSet();

            try
            {

                ds = dac.SelectWebApplicationStatus(mtextUrl.Text);
                DataTable dt = ds.Tables[0];


                if (ds != null && dt != null && dt.Rows.Count > 0)
                {

                    mgrdWebApplication.DataSource = dt;
                }
                else
                {
                     mtlblError.Visible = true;
                }
            }
            catch(Exception ex)
            {
                LogWrite.writeLog(ex.ToString();
            }
        }

Answer 1

I completed my code, advice from Reza Aghaei.

At first using CellFormatting event

private void mgrdContentDatabase_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
    if(this.mgrdContentDatabase.Columns[e.ColumnIndex].HeaderText== "Size(GB)")
    {
        if (e.Value != null)
        {
            CovertFileSize(e);
        }
    }
}

And Next Convert file size Method.

private void CovertFileSize(DataGridViewCellFormattingEventArgs formatting)
        {
            if (formatting.Value != null)
            {
                try
                {
                    long bytes;
                    bytes = Convert.ToInt64(formatting.Value);
                    string size = "0 Bytes";

                    //GB
                    if (bytes >= 1073741824.0)
                        size = String.Format("{0:##.##}", bytes / 1073741824.0) + " GB";
                    //MB
                    else if (bytes >= 1048576.0)
                        size = String.Format("{0:##.##}", bytes / 1048576.0) + " MB";
                    //KB
                    else if (bytes >= 1024.0)
                        size = String.Format("{0:##.##}", bytes / 1024.0) + " KB";
                    //Bytes
                    else if (bytes > 0 && bytes < 1024.0)
                        size = bytes.ToString() + " Bytes";

                    formatting.Value = size;
                    formatting.FormattingApplied = true;
                }
                catch(FormatException)
                {
                    formatting.FormattingApplied = false;
                }
            }

        }

Now it works well in my application.

Answer 2

You can use this function to convert bytes to Megabytes.

public double ConvertBytesToMegabytes(long bytes)
{
    return (bytes / 1024f) / 1024f;
}

Then use that on your code on this part.

webApplicationName =  ConvertBytesToMegabytes(dt.Rows[0]["AppName"].ToString());