1. 实现待查询功能的combox
代码语言：javascript复制 private void Frm_Main_Load(object sender, EventArgs e)
{
cbox_Find.Items.Clear();//清空ComboBox集合
cbox_Find.Items.Add("C#编程词典");//向ComboBox集合添加元素
cbox_Find.Items.Add("C#编程宝典");//向ComboBox集合添加元素
cbox_Find.Items.Add("C#视频学");//向ComboBox集合添加元素
cbox_Find.Items.Add("C#范例宝典");//向ComboBox集合添加元素
cbox_Find.Items.Add("C#从入门到精通");//向ComboBox集合添加元素
cbox_Find.Items.Add("C#范例大全");//向ComboBox集合添加元素
}
private void btn_Begin_Click(object sender, EventArgs e)
{
cbox_Find.AutoCompleteMode = //设置自动完成的模式
AutoCompleteMode.SuggestAppend;
cbox_Find.AutoCompleteSource = //设置自动完成字符串的源
AutoCompleteSource.ListItems;
}2 在combox下拉列表中显示图片
代码语言：javascript复制 private ImageList G_ImageList;//声明ImageList字段
private void cbox_DisplayPictures_DrawItem(object sender, DrawItemEventArgs e)
{
if (G_ImageList != null)//判断ImageList是否为空
{
Graphics g = e.Graphics;//得到绘图对象
Rectangle r = e.Bounds;//得到绘图范围
Size imageSize = G_ImageList.ImageSize;//获取图像大小
if (e.Index >= 0)//判断是否有绘制项
{
Font fn = new Font("宋体", 10, FontStyle.Bold);//创建字体对象
string s = cbox_DisplayPictures.Items[e.Index].ToString();//得到绘制项的字符串
DrawItemState dis = e.State;
if (e.State == (DrawItemState.NoAccelerator | DrawItemState.NoFocusRect))
{
e.Graphics.FillRectangle(new SolidBrush(Color.LightYellow), r);//画条目背景
G_ImageList.Draw(e.Graphics, r.Left, r.Top, e.Index);//绘制图像
e.Graphics.DrawString(s, fn, new SolidBrush(Color.Black),//显示字符串
r.Left imageSize.Width, r.Top);
e.DrawFocusRectangle();//显示取得焦点时的虚线框
}
else
{
e.Graphics.FillRectangle(new SolidBrush(Color.LightGreen), r);//画条目背景
G_ImageList.Draw(e.Graphics, r.Left, r.Top, e.Index);//绘制图像
e.Graphics.DrawString(s, fn, new SolidBrush(Color.Black),//显示字符串
r.Left imageSize.Width, r.Top);
e.DrawFocusRectangle();//显示取得焦点时的虚线框
}
}
}
}
private void btn_Begin_Click(object sender, EventArgs e)
{
btn_Begin.Enabled = false;//停用开始按钮
cbox_DisplayPictures.DrawMode = DrawMode.OwnerDrawFixed;//设置绘制元素方式
cbox_DisplayPictures.DropDownStyle = //设置组合框样式
ComboBoxStyle.DropDownList;
cbox_DisplayPictures.Items.Add("小车");//添加项
cbox_DisplayPictures.Items.Add("卡车");//添加项
cbox_DisplayPictures.Items.Add("工具");//添加项
cbox_DisplayPictures.Items.Add("朋友");//添加项
G_ImageList = new ImageList();//创建ImageList对象
G_ImageList.Images.Add(global::PicturesInComboBox.Properties.Resources.a);//添加图片
G_ImageList.Images.Add(global::PicturesInComboBox.Properties.Resources.b);//添加图片
G_ImageList.Images.Add(global::PicturesInComboBox.Properties.Resources.c);//添加图片
G_ImageList.Images.Add(global::PicturesInComboBox.Properties.Resources.d);//添加图片
}3.实现气泡提示窗口
代码语言：javascript复制 private void clewButton_Click(object sender,EventArgs e)
{
this.notifyIcon1.Visible = true;//设置提示控件可见
this.notifyIcon1.ShowBalloonTip(1000,"当前时间：",DateTime.Now.ToLocalTime().ToString(),ToolTipIcon.Info);//显示气泡提示
}
private void closeButton_Click(object sender,EventArgs e)
{
this.notifyIcon1.Visible = false;//设置提示控件不可见
}
private void notifyIcon1_MouseMove(object sender,MouseEventArgs e)
{
this.notifyIcon1.ShowBalloonTip(1000, "当前时间：", DateTime.Now.ToLocalTime().ToString(), ToolTipIcon.Info);//显示气泡提示
}4.在状态栏实时显示系统运行时间
代码语言：javascript复制 private DateTime G_DateTime;//声明时间字段
private void Frm_Main_Load(object sender, EventArgs e)
{
G_DateTime = DateTime.Now;//得到系统当前时间
Thread P_th = new Thread(//创建线程
() =>//使用Lambda表达式
{
while (true)//无限循环
{
TimeSpan P_TimeSpan =//得到时间差
DateTime.Now - G_DateTime;
Invoke(//调用窗体线程
(MethodInvoker)(() =>//使用Lambda表达式
{
tssLabel_Time.Text =//显示程序启动时间
string.Format(
"系统已经运行： {0}天{1}小时{2}分{3}秒",
P_TimeSpan.Days, P_TimeSpan.Hours,
P_TimeSpan.Minutes, P_TimeSpan.Seconds);
}));
Thread.Sleep(1000);//线程挂起1秒钟
}
});
P_th.IsBackground = true;//设置为后台线程
P_th.Start();//开始执行线程
}5. 打开指定word文档
代码语言：javascript复制 private void button1_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "*.doc|*.doc|*.docx|*.docx";//筛选文件
openFileDialog1.InitialDirectory = @"I:软谋12后端20190424Advanced12Course47SOA-WebServcie20190424Advanced12Course47SOA-WebServcie";
if (openFileDialog1.ShowDialog() == DialogResult.OK)//弹出打开文件对话框
{
string fileName = openFileDialog1.FileName;
Process.Start(fileName);
}
}6. 利用图片对文本进行加密解密
代码语言：javascript复制 //打开图片
private void button1_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "jpg,bmp,gif|*.jpg;*.gif;*.bmp";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
pictureBox1.ImageLocation = openFileDialog1.FileName;
}
}
//打开加密文件
private void button2_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "文本文件|*.txt";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
textBox1.Text = openFileDialog1.FileName;
}
}
// 加密
private void button3_Click(object sender, EventArgs e)
{
try
{
if (pictureBox1.ImageLocation == null)
{ MessageBox.Show("请选择一幅图片用于加密"); return; }
if (textBox1.Text == "")
{ MessageBox.Show("请选择加密文件路径"); return; }
//图片流
FileStream fsPic = new FileStream(pictureBox1.ImageLocation, FileMode.Open, FileAccess.Read);
//加密文件流
FileStream fsText = new FileStream(textBox1.Text, FileMode.Open, FileAccess.Read);
//初始化Key IV
byte[] bykey = new byte[16];
byte[] byIv = new byte[8];
fsPic.Read(bykey, 0, 16);
fsPic.Read(byIv, 0, 8);
//临时加密文件
string strPath = textBox1.Text;//加密文件的路径
int intLent = strPath.LastIndexOf("\") 1;
int intLong = strPath.Length;
string strName = strPath.Substring(intLent, intLong - intLent);//要加密的文件名称
string strLinPath = "C:\" strName;//临时加密文件路径，所以被加密的文件不可以放在C盘的根目录下
FileStream fsOut = File.Open(strLinPath, FileMode.Create, FileAccess.Write);
//开始加密
RC2CryptoServiceProvider desc = new RC2CryptoServiceProvider();//des进行加
BinaryReader br = new BinaryReader(fsText);//从要加密的文件中读出文件内容
CryptoStream cs = new CryptoStream(fsOut, desc.CreateEncryptor(bykey, byIv), CryptoStreamMode.Write);//写入临时加密文件
cs.Write(br.ReadBytes((int)fsText.Length), 0, (int)fsText.Length);//写入加密流
cs.FlushFinalBlock();
cs.Flush();
cs.Close();
fsPic.Close();
fsText.Close();
fsOut.Close();
File.Delete(textBox1.Text.TrimEnd());//册除原文件
File.Copy(strLinPath, textBox1.Text);//复制加密文件
File.Delete(strLinPath);//册除临时文件
MessageBox.Show("加密成功");
pictureBox1.ImageLocation = null;
textBox1.Text = "";
}
catch (Exception ee)
{
MessageBox.Show(ee.Message);
}
}
//解密
private void button4_Click(object sender, EventArgs e)
{
try
{
//图片流
FileStream fsPic = new FileStream(pictureBox1.ImageLocation, FileMode.Open, FileAccess.Read);
//解密文件流
FileStream fsOut = File.Open(textBox1.Text, FileMode.Open, FileAccess.Read);
//初始化Key IV
byte[] bykey = new byte[16];
byte[] byIv = new byte[8];
fsPic.Read(bykey, 0, 16);
fsPic.Read(byIv, 0, 8);
//临时解密文件
string strPath = textBox1.Text;//加密文件的路径
int intLent = strPath.LastIndexOf("\") 1;
int intLong = strPath.Length;
string strName = strPath.Substring(intLent, intLong - intLent);//要加密的文件名称
string strLinPath = "C:\" strName;//临时解密文件路径
FileStream fs = new FileStream(strLinPath, FileMode.Create, FileAccess.Write);
//开始解密
RC2CryptoServiceProvider desc = new RC2CryptoServiceProvider();//des进行解
CryptoStream csDecrypt = new CryptoStream(fsOut, desc.CreateDecryptor(bykey, byIv), CryptoStreamMode.Read);//读出加密文件
BinaryReader sr = new BinaryReader(csDecrypt);//从要加密流中读出文件内容
BinaryWriter sw = new BinaryWriter(fs);//写入解密流
sw.Write(sr.ReadBytes(Convert.ToInt32(fsOut.Length)));//
sw.Flush();
sw.Close();
sr.Close();
fs.Close();
fsOut.Close();
fsPic.Close();
csDecrypt.Flush();
File.Delete(textBox1.Text.TrimEnd());//册除原文件
File.Copy(strLinPath, textBox1.Text);//复制加密文件
File.Delete(strLinPath);//册除临时文件
MessageBox.Show("解密成功");
pictureBox1.ImageLocation = null;
textBox1.Text = "";
}
catch (Exception ee)
{
MessageBox.Show(ee.Message);
}
}
