Multiple SAP Crystal Reports

try

{

int i;

SqlCommand cmd1 = new SqlCommand();

cmd1.Connection = conn;

conn.Open();

SqlDataAdapter da2 = new SqlDataAdapter("Select Count(AdmNo) from StudenTable where [Class]='" + comboBox1.Text + "'", conn);

DataSet ds2 = new DataSet();

da2.Fill(ds2);

i = Convert.ToInt32(ds2.Tables[0].Rows[0][0]);

// MessageBox.Show(i.ToString());

conn.Close();

SqlCommand cmd2 = new SqlCommand();

cmd2.Connection = conn;

conn.Open();

SqlDataAdapter da3 = new SqlDataAdapter("Select Admission_No from StudenTable where [Class]='" + comboBox1.Text + "' ", conn);

DataSet ds3 = new DataSet();

da3.Fill(ds3);

conn.Close();

for (int j = 0; j < i; j++)

{

txt1AdmNo.Text = (ds3.Tables[0].Rows[j][0]).ToString();

//Write Print code here based On the admission Number

}

}

}

catch (Exception ex)

{

conn.Close();

MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);

}