文章分类 - C#入门
摘要：在注册表中：【32位系统，修改以下注册表键值】HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\10.0\Registration\UserNameHKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\RegisteredOrganization【64位系统，修改以下注册表键值】HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\10.0\Registration\UserNameHKEY_LOC
阅读全文
摘要：代码如下： OpenFileDialog openFile = new OpenFileDialog(); private void button1_Click(object sender, EventArgs e) { openFile.Filter = "mp3文件|*.mp3"; StreamWriter myWriter = new StreamWriter("playlist.ini",true); if(DialogResult.OK==openFile.ShowDialog()) { myWriter.WriteLine(openFile.
阅读全文
摘要：代码如下： private void Form13_Load(object sender, EventArgs e) { this.axWindowsMediaPlayer1.uiMode = "none"; } private void button1_Click(object sender, EventArgs e) { OpenFileDialog openFile = new OpenFileDialog(); openFile.Filter = "mp3文件|*.mp3"; if(DialogResult.OK==openFile.ShowDi
阅读全文
摘要：代码 Bitmap myBit = (Bitmap)Bitmap.FromFile(filename); myBit.RotateFlip(RotateFlipType.Rotate90FlipX); pictureBox1.Image = myBit;
阅读全文
摘要：代码如下： private void listView1_SelectedIndexChanged(object sender, EventArgs e) { ListView.SelectedListViewItemCollection lst =this.listView1.SelectedItems; foreach (ListViewItem item in lst) { MessageBox.Show(item.Text); } }
阅读全文
摘要：代码如下： string processName; private void button1_Click(object sender, EventArgs e) { processName = textBox1.Text; Process[] myProcess = Process.GetProcessesByName(processName); foreach(Process process in myProcess) { process.Kill(); } }运行结果：
阅读全文
摘要：代码如下： string helpStr = Application.StartupPath.Substring(0,Application.StartupPath.LastIndexOf("\\")); helpStr += @"\mrHelp.chm"; helpProvider1.HelpNamespace = helpStr; helpProvider1.SetShowHelp(this, true);附：窗体显示问号按钮的属性设置
阅读全文
摘要：代码如下： private void button1_Click(object sender, EventArgs e) { if (EventLog.Exists("neweventlog")) { if(textBox1.Text!="") { eventLog1.WriteEntry(textBox1.Text); MessageBox.Show("日记写入成功", "提示"); textBox1.Text = ""; //button2_Click(null,null); } else
阅读全文
摘要：窗体属性设置：代码如下： private void button1_MouseDown(object sender, MouseEventArgs e) { DoDragDrop(button1,DragDropEffects.Move); } private void Form7_DragDrop(object sender, DragEventArgs e) { object data = e.Data.GetData(typeof(Button)); if (button1 == data) { button1.Top = this.PointToClient(new Point(e.X
阅读全文
摘要：代码如下： private void Form2_Load(object sender, EventArgs e) { //定义treeview所要使用的图标 ImageList image1 = new ImageList(); image1.Images.Add(Bitmap.FromFile(@"1.gif")); image1.Images.Add(Bitmap.FromFile(@"2.gif")); treeView1.ImageList = image1; tvGetData(); } public void tvGetData() { s
阅读全文
摘要：代码如下： ImageList imagelist = new ImageList(); imagelist.Images.Add(Bitmap.FromFile(@"1.gif")); imagelist.Images.Add(Bitmap.FromFile(@"2.gif")); imagelist.Images.Add(Bitmap.FromFile(@"3.gif")); imagelist.Images.Add(Bitmap.FromFile(@"4.gif")); treeView1.ImageList
阅读全文
摘要：关于代码treeView1.Nodes.Add("A","商品信息";1,2)的解释：4个参数的顺序是1，节点名称（KEY）2，节点显示的文本(TEXT)3，节点图片（图像）的索引4，节点被选中时的图片（图像）的索引
阅读全文
摘要：listview属性设置：代码如下： private void Form1_Load(object sender, EventArgs e) { getsource(); } //listview读取数据 public void getsource() { string connStr = "Server=.;Database=db_02;User=sa;Pwd="; using(SqlConnection myConn=new SqlConnection(connStr)) { myConn.Open(); listView1.View = View.Details; l
阅读全文
摘要：代码如下： listView1.View = View.Details; listView1.FullRowSelect = true; //定义ListView中要使用的图标文件 ImageList imagelist1 = new ImageList(); imagelist1.Images.Add(Bitmap.FromFile(@"1.gif")); imagelist1.Images.Add(Bitmap.FromFile(@"2.gif")); imagelist1.Images.Add(Bitmap.FromFile(@"3.gi
阅读全文
摘要：窗体属性设置：代码如下： private void button1_Click(object sender, EventArgs e) { SqlConnection con = new SqlConnection("server=(local);pwd=;uid=sa;database=db_02"); con.Open(); SqlCommand com = new SqlCommand("select * from tb_02", con); SqlDataReader dr = com.ExecuteReader(); //listView1.V
阅读全文
摘要：代码如下： private void button1_Click(object sender, EventArgs e) { listView1.LargeImageList = imageList1; if (textBox1.Text == "") { MessageBox.Show("请输入要添加的数据", "提示"); } else { if (listView1.Items.Count > 0) { for (int i = 0; i < listView1.Items.Count;i++ ) { if(text
阅读全文
摘要：代码如下： private void checkBox1_CheckedChanged(object sender, EventArgs e) { if (checkBox1.Checked == true) { checkedListBox1.Visible = true; CheckAll(checkedListBox1); } else { checkedListBox1.Visible = false; CheckAllEsce(checkedListBox1); } // end block } //全部选中方法，参数传控件名称name 属性值 public void CheckAl
阅读全文
摘要：static void Main() { var a = new[] { 1, 10, 100, 1000 }; // int[] var b = new[] { "hello", null, "world" }; // string[] // single-dimension jagged array var c = new[] { new[]{1,2,3,4}, new[]{5,6,7,8} }; // jagged array of strings var d = new[] { new[]{"Luca", "Mads
阅读全文
摘要：将值类型转换为引用类型的过程称为装箱。装箱某个变量，就是创建一个引用变量，它指向堆上的新副本。引用变量是一个对象，因此，它可以使用每个对象都继承的所有方法（例如 ToString()）。下面的代码进行了具体的说明：int i = 67; // i is a value typeobject o = i; // i is boxedSystem.Console.WriteLine(i.ToString()); // i is boxed在使用旨在用于对象的类时将会遇到取消装箱：例如，使用 ArrayList 存储整数。将某个整数存储在 ArrayList 中，即是对整数进行装箱。检索某个整数时，
阅读全文
摘要：// Set the search string: string myString = "Isabella"; // Search starting from index -1: int index = listBox1.FindString(myString, -1); if (index != -1) { // Select the found item: listBox1.SetSelected(index, true); // Send a success message: MessageBox.Show("Found the item \"&q
阅读全文
浙公网安备 33010602011771号