Put Words into a Variables and Check if it Matches the Data in database

Using the built in crypto classes in .NET can be surprisingly complicated. You need a lot of understanding of what you are doing to get it right and how to work in a secure manner. The choice of algorithm, what cipher mode, key length, block size and understand what salt is and how to use it and also how to hash a password to a proper key are some things you need to deal with. Hopefully, this article will make your life a lot easier.

private void ImageSearch()
{
   if (txtSearch.Text.Trim().Equals(""))
   {
      //when types nothing
      txtSearch.Focus();
      Warning.Text = "Please enter the keyword to search";
      //display message
      return;
   }
   else
   {
      int check = Process.CheckStopWord(txtSearch.Text.Trim());
      //check if the keyword is stop word
      if (check == 0)
      {
         txtSearch.Focus();
         Warning.Text = "No stop word found";
      }
      else
      {
         txtSearch.Focus();
         Warning.Text = "Found Stop word";
      }
   }
}
public static int CheckStopWord(string keyword)
{
   string check = "0";
   string query = "SELECT COUNT (stopword) FROM stopwordtb WHERE [stopword] like '" + keyword + "'";
   //count how many stop word matches the keyword entered, return a string of a number
   accessDB dbaccess = new accessDB();
   DataSet ds = dbaccess.queryData(query);
   DataTable dt = ds.Tables[0];
   if (dt.Rows[0][0].ToString() == check)
   {
      return 0;
      //keyword != stop word in stopwordtb
      // begin search in image database - not implemented yet
   }
   else
   {
      return 1;
      //keyword = stop word in stopwordtb
   }
}