سلام ممنون از پاسختون این کد منه می شه بگید کجاش اشکال داره.......
SqlConnection objConnection = new SqlConnection();
string conString = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirecto ry|\\phone_Data.MDF;Integrated Security=True;Persist Security Info=True;User ID=sa;Password=123456;Connect Timeout=30;TrustServerCertificate=False;User Instance=True;";
objConnection.ConnectionString = conString;
SqlCommand objCommand = new SqlCommand();
objCommand.Connection = objConnection;
objCommand.CommandText = "INSERT INTO phone " +"(phone.name,famil,tel,fax) " +
"VALUES(@name, @famil,@phone,@fax)";
objCommand.Parameters.AddWithValue("@name",txtnewn ame.Text);
objCommand.Parameters.AddWithValue("@famil",txtnew famil.Text);
objCommand.Parameters.AddWithValue("@phone",txtnew tel.Text);
objCommand.Parameters.AddWithValue("@fax",txtnewfa x.Text);
objConnection.Open();
objCommand.ExecuteNonQuery();
objConnection.Close();
this.phoneTableAdapter.Fill(this.phone_DataDataSet .phone);
phoneTableAdapter.Update(this.phone_DataDataSet.ph one);
MessageBox.Show("اطلاعات با موفقیت ذخیره شد");