DataGridView.Rows.Count is 0

Question

I\'m trying to read the content of an excel file (I must process the data not show it) but the number of rows is 0. I did show the data in the UI and the rows didn\'t have a num

Answer 1

try this:

BindingSource bindingSource = new BindingSource();
bindingSource.DataSource = resultDt;

in your case:

bindingSource.DataSource = ds.Tables[0];

and:

dgResult.DataSource = bindingSource;
flowLayoutPanel.Controls.Add(dgResult); 

var c = dgResult.Rows.Count;

The binding source is what's responsible for syncing your data with the control. You want to use it, rather than trying to assign the table directly to the control.

Reference:

Datagridview rowcount showing 0 even when there is a valid datasource

Answer 2

Try this out

        string src = @"C:\SampleData\us-500.xls";
        OleDbConnection con = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + src +
                                          ";Extended Properties=Excel 8.0;");

        //con.Open();
        OleDbDataAdapter da = new OleDbDataAdapter("select * from [MySheet$]", con);
        DataSet ds = new DataSet();
        da.Fill(ds);

        BindingSource bindingSource = new BindingSource();
        bindingSource.DataSource = ds.Tables[0];

        var dataGridView1 = new DataGridView();

        // Add data grid view as child control on form, flow Layout Panel is placed on windows form 
        flowLayoutPanel1.Controls.Add(dataGridView1);

        dataGridView1.DataSource = bindingSource;
        int rows = dataGridView1.Rows.Count;
        int cells = dataGridView1.Rows[0].Cells.Count;