Count shows 1 extra record count.

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C#

if (txtcombo.Text == "Form ID")
                {
                  
                    label1.Hide();
                    Global.Open_DataConn("doc", "conData");
                    OleDbDataAdapter da = new OleDbDataAdapter("SELECT WCDCH.formid, WCDCH.surname, WCDCH.firstname, WCDCH.midname, WCDCH.ttransid FROM WCDCH INNER JOIN bankdata ON WCDCH.formid = bankdata.formid", Global.conData);
                    DataSet ds = new DataSet();
                    da.Fill(ds);
                    dataGridView1.DataSource = ds.Tables[0];
                    label2.Show();
                    label4.Visible = true;
                    label3.Text = dataGridView1.RowCount.ToString();     
                }
                else if (txtcombo.Text == "TransactionID")
                {                  
                    label2.Hide();
                    Global.Open_DataConn("doc", "conData");
                    OleDbDataAdapter da = new OleDbDataAdapter("SELECT WCDCH.formid, WCDCH.surname, WCDCH.firstname, WCDCH.midname, WCDCH.ttransid FROM WCDCH INNER JOIN bankdata ON WCDCH.ttransid = bankdata.ttransid", Global.conData);
                    DataSet ds = new DataSet();
                    da.Fill(ds);
                    dataGridView1.DataSource = ds.Tables[0];
                    label1.Show();
                    label4.Visible = true;
                    label3.Text = dataGridView1.RowCount.ToString();           
                }
                else
                {
                    MessageBox.Show("Please,Select option which you want");
                }      
            } 

I have done the get matching record from the database in datagrid and count the record from result shown in the datagrid, But the count shows the 1 extra record count.