通过点击浏览按钮输入文件：
点击查询按钮后返回结果：
前台代码：
1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> 2 3 <!DOCTYPE html> 4 5 <html xmlns="http://www.w3.org/1999/xhtml"> 6 <head runat="server"> 7 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> 8 <title></title> 9 </head> 10 <body> 11 <form id="form1" runat="server"> 12 <h4>词频统计器 13 </h4> 14 <div> 15 <p> 16 请选择文件：<asp:FileUpload ID="FileUpload1" runat="server" /> 17 </p> 18 <p> 19 <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" style="height: 21px; 62px" Text="查询" /> 20 </p> 21 </div> 22 <div> 23 24 <asp:TextBox ID="TextBox1" runat="server" Height="300px" TextMode="MultiLine" Width="326px" Enabled="False"></asp:TextBox> 25 26 </div> 27 </form> 28 </body> 29 </html>
后台代码:
1 using System; 2 using System.Collections; 3 using System.Configuration; 4 using System.Data; 5 using System.Linq; 6 using System.Web; 7 using System.Web.Security; 8 using System.Web.UI; 9 using System.Web.UI.HtmlControls; 10 using System.Web.UI.WebControls; 11 using System.Web.UI.WebControls.WebParts; 12 using System.Xml.Linq; 13 using System.Text; 14 using System.Collections.Generic; 15 using System.IO; 16 17 public partial class _Default : System.Web.UI.Page 18 { 19 protected void Page_Load(object sender, EventArgs e) 20 { 21 } 22 23 protected void Button1_Click(object sender, EventArgs e) 24 { 25 if(FileUpload1.HasFiles) 26 { 27 int n=0; 28 string strfile = FileUpload1.PostedFile.FileName; 29 string strout; 30 StreamReader sr = File.OpenText(strfile); 31 String input = sr.ReadToEnd(); 32 sr.Close(); 33 //Response.Write(input); 34 char [] text = input.ToCharArray(); 35 Dictionary<string, int> map = new Dictionary<string, int>(); 36 for(int i=0;i<text.Length;i++) 37 { 38 string s = ""; 39 while (i< text.Length&&((text[i] >= 'a' && text[i] <= 'z') || (text[i] >= 'A' && text[i] <= 'Z') || text[i] == '-')) 40 { 41 if (text[i] >= 'A' && text[i] <= 'Z') 42 s += (text[i] + 32); 43 else 44 s += text[i]; 45 i++; 46 } 47 if (!map.ContainsKey(s)) 48 { 49 if (s == "") continue; 50 n++; 51 map.Add(s, 1); 52 } 53 else 54 { 55 map[s]++; 56 } 57 } 58 strout = ""; 59 strout = "单次总数为:" + n.ToString() + " "; 60 List<KeyValuePair<string, int>> myList = new List<KeyValuePair<string, int>>(map); 61 myList.Sort(delegate (KeyValuePair<string, int> s1, KeyValuePair<string, int> s2) 62 { 63 return s2.Value.CompareTo(s1.Value); 64 }); 65 map.Clear(); 66 67 foreach (KeyValuePair<string, int> pair in myList) 68 { 69 strout = strout + pair.Key + " " + pair.Value + " "; 70 //dic.Add(pair.Key, pair.Value); 71 72 } 73 74 75 76 TextBox1.Text = strout; 77 78 } 79 } 80 }