private void login_Click(object sender, EventArgs e) { try { if ((textBox1.Text == "admin") && (textBox2.Text == "admin")) { this.Hide(); admin f = new admin(); f.Show(); } if ((textBox1.Text != "admin")) { con.Open(); SqlCommand cmd1 = new SqlCommand("Select Name,Password from Recipient where Name='" + textBox1.Text + "' and Password='******'", con); SqlDataReader dr1 = cmd1.ExecuteReader(); int count1 = 0; while (dr1.Read()) { count1++; } if (count1 == 1) { recipientaccount f = new recipientaccount(); this.Hide(); f.Show(); } con.Close(); } if ((textBox1.Text != "admin")) { con.Open(); SqlCommand cmd = new SqlCommand("Select Mail ,Password from Donor where Mail='" + textBox1.Text + "' and Password='******'", con); SqlDataReader dr = cmd.ExecuteReader(); int count = 0; while (dr.Read()) { count += 1; } if (count == 1) { donoraccount f = new donoraccount(); this.Hide(); f.Show(); } } con.Close(); } catch { MessageBox.Show("Error"); } }