C# - Saving a DataGridView to file and loading

Question

To start off, what I have is a simple Winforms app, with just a save and load button, and with a datagridview control to hold data. What I am looking to do is input some dat

Answer 1

I have tested a simple way to save datagridview to a file :

//DataGridView dgv=...
string file= "c:\\mygrid.bin";
using (BinaryWriter bw = new BinaryWriter(File.Open(file, FileMode.Create)))
{
    bw.Write(dgv.Columns.Count);
    bw.Write(dgv.Rows.Count);
    foreach (DataGridViewRow dgvR in dgv.Rows)
    {
       for (int j = 0; j < dgv.Columns.Count; ++j)
       {
           object val=dgvR.Cells[j].Value;
           if (val == null)
           {
                bw.Write(false);
                bw.Write(false);
            }
            else
            {
                bw.Write(true);
                bw.Write(val.ToString());
             }
         }
    }

and for loading such a file into a datagridview:

//DataGridView dgv = ...
dgv.Rows.Clear();
string file="c:\\mygrid.bin";
using (BinaryReader bw = new BinaryReader(File.Open(file, FileMode.Open)))
{
   int n=bw.ReadInt32();
   int m=bw.ReadInt32();
   for(int i=0;i

Consider that I have assumed that the datagridview control has fixed columns, in you specific situation you should add some codes to insert new columns or create a new gridview.