pass parameter value from one method to another aspx.net - asp.net

Question

I need help here. Below is my code. In this line of code
dtCurrentTable.Rows[0]["Kolicina"] = Convert.ToInt32(Label37.Text) + 3;
instead of 3 in next method this Label37.Text value should be incremented for one each time when user press the button.So I want this label value in next method to start to count from current value for one each time on button click.
protected void btnTest_Click(object sender, EventArgs e)
{
var clickedRow = ((Button)sender).NamingContainer as GridViewRow;
var clickedIndex = clickedRow.RowIndex;
decimal old = dtCurrentTable.Rows[clickedIndex].Field<decimal>("Kolicina");
decimal oldIznos = dtCurrentTable.Rows[clickedIndex].Field<decimal>("VkIznos");
decimal VkDanok = dtCurrentTable.Rows[clickedIndex].Field<decimal>("VkDanok");
string Cena1 = dtCurrentTable.Rows[clickedIndex].Field<string>("Cena1");
int TarifaID = dtCurrentTable.Rows[clickedIndex].Field<Int16>("TarifaID");
newValue = old - 1;
// so i need label value from here to go in next method and increment++
Label37.Text = newValue.ToString();
decimal newIznos = oldIznos - Convert.ToDecimal(Cena1);
dtCurrentTable.Rows[clickedIndex].SetField("Kolicina", newValue.ToString());
dtCurrentTable.Rows[clickedIndex].SetField("VkIznos", newIznos.ToString());
}
protected void Button6_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["string2"].ConnectionString);
conn.Open();
ViewState["count"] = Convert.ToInt32(ViewState["count"]) + 1;
// SqlCommand sqlCmd = new SqlCommand();
// sqlCmd.CommandText = "SupaSpanak";
// sqlCmd.Connection = conn;
// sqlCmd.CommandType = CommandType.StoredProcedure;
SqlCommand cmd1 = new SqlCommand("SELECT pkid,Artikal,Vid,EdMera,TarifaID,Cena1 FROM Artikli WHERE Artikal= 'N KREM SUPA OD SPANA]++' AND Cena1 = 130.00", conn);
//brojac za kolicina
count++;
decimal noofcount = count;
Session["kolicina"] = noofcount;
Label5.Text = Session["kolicina"].ToString();//ViewState["count"].ToString();//
SqlDataReader reader = cmd1.ExecuteReader();
if (reader.Read())
{
Label9.Text = (string)reader["pkid"].ToString();
Label3.Text = (string)reader["Artikal"].ToString();
Label23.Text = (string)reader["Vid"].ToString();
Label10.Text = (string)reader["EdMera"].ToString();
Label7.Text = (string)reader["TarifaID"].ToString();
Label4.Text = (string)reader["Cena1"].ToString();
decimal cena = Convert.ToDecimal(Label5.Text);//kolicina
decimal kolicina = Convert.ToDecimal(Label4.Text);//cena
//vkIznos
decimal mnoz = cena * kolicina;
Label6.Text = mnoz.ToString();
Convert.ToDecimal(Label6.Text);
conn.Close();
DataTable dtCurrentTable = (DataTable)ViewState["Markici"];
if (Label37.Text == "0")
{
dtCurrentTable.Rows[0]["Kolicina"] = Label5.Text;
}
if (Label37.Text != "0")
{
//Here this current value of Label37.text need to be incremented for one each time when button is clicked.
dtCurrentTable.Rows[0]["Kolicina"] = Convert.ToInt32(Label37.Text) + 3;
}

Answer 1

you need viewstate,
public int Counter
{
get
{
if (ViewState["Counter"] != null)
{
return Convert.ToInt32(ViewState["Counter"]);
}
else
return 0;
}
set { ViewState["Counter"] = value; }
}
protected void Button6_Click(object sender, EventArgs e)
{
//other codes..
Counter = Counter + 1;
if (Label37.Text != "0")
{
dtCurrentTable.Rows[0]["Kolicina"] = Convert.ToInt32(Label37.Text) + Counter;
}
}