frmdataviewer.cs

用C#编写的一个款搜索engine的源代码！摘自<Visual c#2005 程序设计>

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using SECompare.Structure;

namespace SECompare.Forms
{
    public partial class FrmDataViewer : Form
    {
        public FrmDataViewer()
        {
            InitializeComponent();
        }

        private void btnShow_Click(object sender, EventArgs e)
        {
            String Query = this.txtQuery.Text;
            int start = Convert.ToInt32(this.txtStart.Text);
            int length = Convert.ToInt32(this.txtLength.Text);

            //Initial TextBox
            this.txtData1.Text = "";
            this.txtData2.Text = "";

            if (this.engineList1.SelectedEngine == null || this.engineList2.SelectedEngine == null)
            {
                MessageBox.Show("Please select engines!");
                return;
            }
            //Show Data
            for (int rank = start; rank < start + length; rank++)
            {
                String Engine1 = this.engineList1.SelectedEngine;
                if (QueryRecord.Exists(Query, Engine1, rank))
                    txtData1.Text += QueryRecord.Load(Query, Engine1, rank).ToString();

                String Engine2 = this.engineList2.SelectedEngine;
                if (QueryRecord.Exists(Query, Engine2, rank))
                    txtData2.Text += QueryRecord.Load(Query, Engine2, rank).ToString();
            }

            if (this.txtData1.Text.Equals(""))
                this.txtData1.Text = "No Result!";
            if (this.txtData2.Text.Equals(""))
                this.txtData2.Text = "No Result!";
        }
    }
}