Üdv! C# WPF programozással kapcsolatban lenne kérdésem megköszönném, ha valaki segítene!?

Íme a kódrészlet:

string connetionstring = "Data Source=ip_adress;Initial Catalog=name;Persist Security Info=True;User ID=user_id;Password=****;";

string StrQuery;

try

{

using (SqlConnection conn = new SqlConnection(connetionstring))

{

using (SqlCommand comm = new SqlCommand())

{

// SqlConnection conn = new SqlConnection(connetionstring);

// SqlCommand comm = new SqlCommand();

SqlConnection cnn2 = new SqlConnection(connetionstring);

comm.Connection = cnn2;

cnn2.Open();

for (int i = 0; i < dataGridView1.Rows.Count; i++)

{

StrQuery = "INSERT INTO [dbo].[PTS_Firewall_V2] ([valami], [valami1], [Scandate], [valami2], [valami3], [valami4], [valami5]) VALUES ('"

+ Convert.ToString(dataGridView1.Rows[i].Cells["valami"].Value) + "',' "

+ Convert.ToString(dataGridView1.Rows[i].Cells["valami1"].Value) + "',' "

+ Convert.ToString(dataGridView1.Rows[i].Cells["Scandate"].Value) + "', '"

+ Convert.ToString(dataGridView1.Rows[i].Cells["valami2"].Value) + "',' "

+ Convert.ToString(dataGridView1.Rows[i].Cells["valami3"].Value) + "',' "

+ Convert.ToString(dataGridView1.Rows[i].Cells["valami4"].Value) + "',' "

+ Convert.ToString(dataGridView1.Rows[i].Cells["valami5"].Value) + "')";

comm.CommandText = StrQuery;

//SqlDataReader dr = comm.ExecuteReader();

comm.ExecuteNonQuery();

// MessageBox.Show("Sikeresen feltöltve! / Succes upload!");

cnn2.Close();