Insert Values Gridview and Textbox into DB

for (int i = 0; i < dgvScreenDetails.Rows.Count; i++)
{

cmd.CommandText = "insert into UserHdr(UserType,UserId,UserName,DepartmentId,DepartmentName,Password,ScreenCode,ScreenName,DeleteFlag) values(@UserType,@UserId,@UserName,@DepartmentId,@DepartmentName,@Password,@ScreenCode,@ScreenName,'N')";

if (rbAdmin.Checked == true)
{
cmd.Parameters.Add("@UserType", SqlDbType.NVarChar).Value = rbAdmin.Text;
}
else if (rbManagement.Checked == true)
{
cmd.Parameters.Add("@UserType", SqlDbType.NVarChar).Value = rbManagement.Text;
}
else if (rbUser.Checked == true)
{
cmd.Parameters.Add("@UserType", SqlDbType.NVarChar).Value = rbUser.Text;
}
cmd.Parameters.Add("@UserId", SqlDbType.NVarChar).Value = txtUserId.Text;
cmd.Parameters.Add("@UserName", SqlDbType.NVarChar).Value = txtUserName.Text;
cmd.Parameters.Add("@DepartmentId", SqlDbType.NVarChar).Value = txtDeptId.Text;
cmd.Parameters.Add("@DepartmentName", SqlDbType.NVarChar).Value = txtDeptName.Text;
cmd.Parameters.Add("@Password", SqlDbType.NVarChar).Value = txtPassword.Text;
cmd.Parameters.Add("@ScreenCode", SqlDbType.NVarChar).Value = dgvScreenDetails.Rows[i].Cells[0].Value;
cmd.Parameters.Add("@ScreenName", SqlDbType.NVarChar).Value = dgvScreenDetails.Rows[i].Cells[1].Value;

}
cmd.ExecuteNonQuery();
MessageBox.Show("Record Saved Successfully");

txtUserId.Text = "";
txtUserName.Text = "";
txtDeptId.Text = "";
txtDeptName.Text = "";
txtPassword.Text = "";
txtRePassword.Text = "";
if (rbAdmin.Checked == true)
{
rbAdmin.Checked = false;
}
else if (rbManagement.Checked == true)
{
rbManagement.Checked = false;
}
else if (rbUser.Checked == true)
{
rbUser.Checked = false;
}

conn.Close();