题目一：编写C#程序，统计硬盘某个目录下的abc.txt文件中单词的个数。提示：要用到字符串类中的分割字符串等函数
源程序：
using System;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using System.Windows.Forms;
namespace 上机六
{
public partial class 统计单词数 : Form
{
public 统计单词数()
{
InitializeComponent();
StartPosition = FormStartPosition.CenterScreen;
}
private void button1_Click(object sender, EventArgs e)
{
string file = textBox1.Text;
if (!File.Exists(@file))
MessageBox.Show("文件" + @file + "不存在");
else
{
int a;
FileStream fs = new FileStream(@file, FileMode.Open, FileAccess.Read);
richTextBox1.Clear();
a = fs.ReadByte();
while (a != -1) //是否读到文件末尾
{
richTextBox1.Text += ((char)a).ToString();
a = fs.ReadByte();
}
fs.Close();
}
}
/*
* 正则表达式中“\d”表示[0-9]的数字，“\d+”表示由[0-9]的数字组成的数字，“\w”表示[A-Z0-9]，
* “\w+”表示由数字、26 个英文字母或者下划线组成的字符串，“\d+.+\d+”表示小数
*/
private void button2_Click(object sender, EventArgs e)
{
Regex reg = new Regex("\\S+\\w+");
string InputStr = richTextBox1.Text;
int Count = reg.Split(InputStr).Count() - 1;
richTextBox2.Text = "单词个数：" + Count.ToString();
}
}
}运行结果：
题目二：编写一个重复文件的检测程序：程序可以实现重复文件检测（即将硬盘某个盘符下的重复文件以ListBox控件列表的形式显示出来，例如：有1.doc、2.doc、3.doc完全一样，则这三个应该放在同一个ListBox1控件中；而a.exe、b.exe完全一样，则放在另一个ListBox2控件中）（可由设计者自行设计分组）。
源程序：
using System;
using System.Collections.Generic;
using System.IO;
using System.Windows.Forms;
namespace 上机六
{
public partial class 重复文件检测 : Form
{
public 重复文件检测()
{
InitializeComponent();
StartPosition = FormStartPosition.CenterScreen;
}
string path = @"D:\demo";
string checktxt = "";
private void button1_Click(object sender, EventArgs e)
{
List<string> files = new List<string>();
ForeachFile(path, ref files);
foreach (var f in files)
{
try
{
string txt = "";
using (StreamReader sr = new StreamReader(f.ToString()))
{
string line;
while ((line = sr.ReadLine()) != null)
{
txt += line + "\n";
Console.WriteLine(line);
}
}
if (checktxt == "")
{
listBox1.Items.Add(f.ToString());
checktxt = txt;
}
else if (txt == checktxt)
{
listBox1.Items.Add(f.ToString());
}
else
{
listBox2.Items.Add(f.ToString());
}
}
catch
{
Console.WriteLine("The file could not be read:");
}
}
}
public static void ForeachFile(string filePathByForeach, ref List<string> result)
{
DirectoryInfo theFolder = new DirectoryInfo(filePathByForeach);
DirectoryInfo[] dirInfo = theFolder.GetDirectories();//获取所在目录的文件夹
FileInfo[] file = theFolder.GetFiles();//获取所在目录的文件
foreach (FileInfo fileItem in file) //遍历文件
{
result.Add(fileItem.DirectoryName + "\\" + fileItem.Name);
}
//遍历文件夹
foreach (DirectoryInfo NextFolder in dirInfo)
{
ForeachFile(NextFolder.FullName, ref result);
}
}
}
}运行结果：
题目三：编程实现个人通讯录信息的添加、删除、查找和更新功能。要求数据库可自行选取，采用编程方式实现，界面自行设计。
源程序：
Main.cs
namespace 手机通讯录系统
{
public partial class Main : Form
{
public Main()
{
InitializeComponent();
StartPosition = FormStartPosition.CenterScreen;
}
private void btn_register_Click(object sender, EventArgs e)
{
register register = new register();
register.Show();
}
private void btn_login_Click(object sender, EventArgs e)
{
login login = new login();
login.Show();
}
}
}register.cs
namespace 手机通讯录系统
{
public partial class register : Form
{
public register()
{
InitializeComponent();
StartPosition = FormStartPosition.CenterScreen;
}
static String connStr = "Data Source=DESKT*****V62P;Initial Catalog=S_T;Persist Security Info=True;User ID=sa;Password=*****";
private void register_click_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection(connStr);
conn.Open();
string sql2 = "INSERT INTO users (user_id, username, password) VALUES (" + new Random().Next(99) + ", '" + t_name.Text + "', '" + t_password.Text + "')";
SqlCommand cmd = new SqlCommand(sql2, conn);
int i = cmd.ExecuteNonQuery();
if (i == 1)
{
MessageBox.Show("注册成功！");
this.Close();
}
else
{
MessageBox.Show("注册失败！");
}
}
}
}login.cs
namespace 手机通讯录系统
{
public partial class login : Form
{
public login()
{
InitializeComponent();
StartPosition = FormStartPosition.CenterScreen;
}
static String connStr = "Data Source=DESK*****62P;Initial Catalog=S_T;Persist Security Info=True;User ID=sa;Password=*****";
private void login_click_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection(connStr);
conn.Open();
string sql2 = "SELECT count(*) count FROM users where username='" + t_name.Text + "' and password = '" + t_password.Text + "'";
SqlCommand cmd = new SqlCommand(sql2, conn);
int i = (int)cmd.ExecuteScalar();
if (i > 0)
{
phoneInfo message = new phoneInfo();
message.Show();
this.Close();
}
else
{
MessageBox.Show("登录失败！");
}
}
}
}phoneInfo.cs
namespace 手机通讯录系统
{
public partial class phoneInfo : Form
{
static String connStr = "Data Source=DES******V62P;Initial Catalog=S_T;Persist Security Info=True;User ID=sa;Password=*****";
SqlCommand cmd;
int RowIndex = -1;
public phoneInfo()
{
InitializeComponent();
StartPosition = FormStartPosition.CenterScreen;
Load();
}
public new void Load()
{
this.ManagePhone_Load(null, null);
}
private void ManagePhone_Load(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection(connStr);
conn.Open();
String sql = "select * from phone";
SqlCommand cmd = new SqlCommand(connStr);
cmd.CommandText = sql;
cmd.CommandType = CommandType.Text;
SqlDataAdapter adapter = new SqlDataAdapter(sql, conn);
DataSet ds = new DataSet();
adapter.Fill(ds);
dataGridView1.DataSource = ds.Tables[0];
conn.Close();
}
private void btn_add_Click(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection(connStr);
conn.Open();
phoneInfo manage = this;
addPhone addStudent = new addPhone(conn, manage);
addStudent.Show();
ManagePhone_Load(sender, e);
}
private void btn_update_Click(object sender, EventArgs e)
{
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
if (dataGridView1.Rows[i].Selected == true)
{
RowIndex = i;
}
}
if (RowIndex == -1)
{
MessageBox.Show("请选择学生再修改！");
}
else
{
SqlConnection conn = new SqlConnection(connStr);
conn.Open();
phoneInfo manage = this;
updatePhone phone = new updatePhone(dataGridView1.Rows[RowIndex].Cells, conn, manage);
phone.Show();
ManagePhone_Load(sender, e);
}
}
private void btn_delete_Click(object sender, EventArgs e)
{
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
if (dataGridView1.Rows[i].Selected == true)
{
RowIndex = i;
}
}
if (RowIndex == -1)
{
MessageBox.Show("请选择学生再删除！");
}
else
{
DialogResult result = MessageBox.Show("确定删除" + dataGridView1.Rows[RowIndex].Cells[1].Value + "的信息？", "删除", MessageBoxButtons.OKCancel);
int pid = 0;
if (result == DialogResult.OK)
{
SqlConnection conn = new SqlConnection(connStr);
conn.Open();
pid = Convert.ToInt32(dataGridView1.Rows[RowIndex].Cells[0].Value);
Console.WriteLine(pid);
string sql2 = "delete from phone where pid =" + pid;
cmd = new SqlCommand(sql2, conn);
cmd.ExecuteNonQuery();
RowIndex = -1;
}
ManagePhone_Load(sender, e);
}
}
private void btn_close_Click(object sender, EventArgs e)
{
this.Close();
}
private void phoneInfo_Load(object sender, EventArgs e)
{
// TODO: 这行代码将数据加载到表“s_TDataSet.phone”中。您可以根据需要移动或移除它。
this.phoneTableAdapter.Fill(this.s_TDataSet.phone);
}
}
}addPhone.cs
namespace 手机通讯录系统
{
public partial class addPhone : Form
{
private SqlConnection conn;
private phoneInfo manage;
public addPhone(SqlConnection conn, phoneInfo manage)
{
this.conn = conn;
this.manage = manage;
InitializeComponent();
}
public addPhone()
{
InitializeComponent();
StartPosition = FormStartPosition.CenterScreen;
}
private void btn_add_Click(object sender, EventArgs e)
{
string sql2 = "insert into phone (pid, pname, pnumber, pemail) VALUES (" + new Random().Next(999) + ", '" + text_name.Text + "', '" + text_phone.Text + "', '" + text_email.Text + "')";
SqlCommand cmd = new SqlCommand(sql2, conn);
MessageBox.Show(sql2);
cmd.ExecuteNonQuery();
conn.Close();
Console.Write(sql2);
MessageBox.Show("添加成功！");
manage.Load();
this.Close();
}
}
}updatePhone.cs
namespace 手机通讯录系统
{
public partial class updatePhone : Form
{
private DataGridViewCellCollection row = null;
private SqlConnection conn = null;
private phoneInfo manage = null;
private int status = 0;
public updatePhone(DataGridViewCellCollection row, SqlConnection conn, phoneInfo manage)
{
InitializeComponent();
StartPosition = FormStartPosition.CenterScreen;
this.conn = conn;
this.row = row;
this.text_id.Text = Convert.ToString(row[0].Value);
this.text_name.Text = Convert.ToString(row[1].Value);
this.text_phone.Text = Convert.ToString(row[2].Value);
this.text_email.Text = Convert.ToString(row[3].Value);
int pid = Convert.ToInt32(row[0].Value);
this.manage = manage;
}
public int getStatus()
{
return status;
}
private void btn_update_Click(object sender, EventArgs e)
{
int pid = Convert.ToInt32(this.text_id.Text);
Console.WriteLine(pid);
string sql2 = "update phone set pname = '" + text_name.Text + "',pnumber = '" + text_phone.Text + "',pemail = '" + text_email.Text + "' where pid =" + pid;
SqlCommand cmd = new SqlCommand(sql2, conn);
cmd.ExecuteNonQuery();
conn.Close();
Console.Write(sql2);
MessageBox.Show("修改成功！");
this.status = -1;
manage.Load();
this.Close();
}
}
}运行结果：
手机通讯系统
注册
登录
手机通讯录系统信息
添加新联系人
删除联系人
修改联系人
