[分享]C#入门代码集（2）

emptyed · 发表于 2006-3-29 08:32:06

十一、用ADO添加数据到数据库中： using System; using System.Data;  using System.Data.OleDb;  class TestADO {  static void Main(string[] args)  {  string strDSN = "

rovider=Microsoft.Jet.OLEDB.4.0;DataSource=c:\test.mdb";  string strSQL = "INSERT INTO Employee(FirstName, LastName) valueS('FirstName', 'LastName')" ;  // create Objects of ADOConnection and ADOCommand  OleDbConnection conn = new OleDbConnection(strDSN);  OleDbCommand cmd = new OleDbCommand( strSQL, conn ;  try  {  conn.Open();  cmd.ExecuteNonQuery();  }  catch (Exception e)  {  Console.WriteLine("Oooops. I did it again:\n{0}", e.Message);  }  finally  {  conn.Close();  }  }  }   十二、使用OLEConn连接数据库： using System; using System.Data;  using System.Data.OleDb;  class TestADO {  static void Main(string[] args)  {  string strDSN = "

rovider=Microsoft.Jet.OLEDB.4.0;DataSource=c:\test.mdb";  string strSQL = "SELECT * FROM employee" ;  OleDbConnection conn = new OleDbConnection(strDSN); OleDbDataAdapter cmd = new OleDbDataAdapter( strSQL, conn ;  conn.Open(); DataSet ds = new DataSet(); cmd.Fill( ds, "employee" ; DataTable dt = ds.Tables[0]; foreach( DataRow dr in dt.Rows  { Console.WriteLine("First name: "+ dr["FirstName"].ToString() + " Last name: "+ dr["LastName"].ToString()); } conn.Close();  }  }   十三、读取表的属性： using System; using System.Data;  using System.Data.OleDb;  class TestADO {  static void Main(string[] args)  {  string strDSN = "

rovider=Microsoft.Jet.OLEDB.4.0;DataSource=c:\test.mdb";  string strSQL = "SELECT * FROM employee" ;  OleDbConnection conn = new OleDbConnection(strDSN); OleDbDataAdapter cmd = new OleDbDataAdapter( strSQL, conn ;  conn.Open(); DataSet ds = new DataSet(); cmd.Fill( ds, "employee" ; DataTable dt = ds.Tables[0]; Console.WriteLine("Field Name DataType Unique AutoIncrement AllowNull"; Console.WriteLine("=================================================================="; foreach( DataColumn dc in dt.Columns  { Console.WriteLine(dc.ColumnName+" , "+dc.DataType +" ,"+dc.Unique +" ,"+dc.AutoIncrement+" ,"+dc.AllowDBNull ; } conn.Close();  }  }  ASP.NET方面的 十四、一个ASP.NET程序： <<a href="mailto:%@Page">%@Page</a> Language="C#" %><script runat="server"> void Button1_Click(Objectsender, EventArgs e){Label1.Text=TextBox1.Text;}      <form runat="server"> Enteryour name: <asp:TextBox id="TextBox1" runat="server"></asp:TextBox> <asp

abel id="Label1" runat="server" Width="247px"></asp

abel> <asp:Button id="Button1" onclick="Button1_Click" runat="server" Text="Submit"></asp:Button> </form>  WinForm开发： 十五、一个简单的WinForm程序： using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; public class SimpleForm : System.Windows.Forms.Form { private System.ComponentModel.Container components = null; private System.Windows.Forms.Button button1; private System.Windows.Forms.TextBox textBox1; public SimpleForm() { InitializeComponent(); } protected override void Dispose( bool disposing  { if( disposing  { if (components != null) { components.Dispose(); } } base.Dispose( disposing ; } #region Windows Form Designer generated code private void InitializeComponent() { this.components = new System.ComponentModel.Container(); this.Size = new System.Drawing.Size(300,300); this.Text = "Form1"; this.button1 = new System.Windows.Forms.Button(); this.textBox1 = new System.Windows.Forms.TextBox(); this.SuspendLayout();  // // button1 // this.button1.Location = new System.Drawing.Point(8, 16); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(80, 24); this.button1.TabIndex = 0; this.button1.Text = "button1"; // // textBox1 // this.textBox1.Location = new System.Drawing.Point(112, 16); this.textBox1.Name = "textBox1"; this.textBox1.Size = new System.Drawing.Size(160, 20); this.textBox1.TabIndex = 1; this.textBox1.Text = "textBox1"; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(292, 273); this.Controls.AddRange(new System.Windows.Forms.Control[] { this.textBox1, this.button1}); this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false);  } #endregion [STAThread] static void Main() { Application.Run(new SimpleForm()); }  } 十六、运行时显示自己定义的图标： //load icon and set to form System.Drawing.Icon ico = new System.Drawing.Icon(@"c:\temp\app.ico"; this.Icon = ico; 十七、添加组件到ListBox中： private void Form1_Load(object sender, System.EventArgs e) { string str = "First item"; int i = 23; float flt = 34.98f;  listBox1.Items.Add(str); listBox1.Items.Add(i.ToString()); listBox1.Items.Add(flt.ToString()); listBox1.Items.Add("Last Item in the List Box"; }

emptyed · 发表于 2006-3-29 08:33:42

网络方面的： 十八、取得IP地址： using System; using System.Net; class GetIP { public static void Main() { IPHostEntry ipEntry = Dns.GetHostByName ("localhost"; IPAddress [] IpAddr = ipEntry.AddressList; for (int i = 0; i < IpAddr.Length; i++) {  Console.WriteLine ("IP Address {0}: {1} ", i, IpAddr.ToString ()); } } }十九、取得机器名称： using System; using System.Net; class GetIP { public static void Main() { Console.WriteLine ("Host name : {0}", Dns.GetHostName()); } } 二十、发送邮件： using System; using System.Web; using System.Web.Mail; public class TestSendMail { public static void Main() { try { // Construct a new mail message  MailMessage message = new MailMessage(); message.From = "<a href="mailto:from@domain.com">from@domain.com</a>"; message.To = "<a href="mailto:pengyun@cobainsoft.com">pengyun@cobainsoft.com</a>"; message.Cc = ""; message.Bcc = ""; message.Subject = "Subject"; message.Body = "Content of message"; //if you want attach file with this mail, add the line below message.Attachments.Add(new MailAttachment("c:\\attach.txt", MailEncoding.Base64)); // Send the message SmtpMail.Send(message);  System.Console.WriteLine("Message has been sent"; } catch(Exception ex) { System.Console.WriteLine(ex.Message.ToString()); } } }二十一、根据IP地址得出机器名称： using System; using System.Net; class ResolveIP { public static void Main() { IPHostEntry ipEntry = Dns.Resolve("172.29.9.9"; Console.WriteLine ("Host name : {0}", ipEntry.HostName);  } }GDI+方面的： 二十二、GDI+入门介绍： using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; public class Form1 : System.Windows.Forms.Form { private System.ComponentModel.Container components = null; public Form1() { InitializeComponent(); } protected override void Dispose( bool disposing  { if( disposing  { if (components != null)  { components.Dispose(); } } base.Dispose( disposing ; } #region Windows Form Designer generated code private void InitializeComponent() { this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(292, 273); this.Name = "Form1"; this.Text = "Form1"; this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint); } #endregion [STAThread] static void Main()  { Application.Run(new Form1()); } private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { Graphics g=e.Graphics; g.DrawLine(new Pen(Color.Blue),10,10,210,110); g.DrawRectangle(new Pen(Color.Red),10,10,200,100); g.DrawEllipse(new Pen(Color.Yellow),10,150,200,100); } }XML方面的： 二十三、读取XML文件： using System; using System.Xml;  class TestReadXML { public static void Main() { XmlTextReader reader = new XmlTextReader("C:\\test.xml"; reader.Read(); while (reader.Read()) {  reader.MoveToElement(); Console.WriteLine("XmlTextReader Properties Test"; Console.WriteLine("===================";  // Read this properties of element and display them on console Console.WriteLine("Name:" + reader.Name); Console.WriteLine("Base URI:" + reader.BaseURI); Console.WriteLine("Local Name:" + reader.LocalName); Console.WriteLine("Attribute Count:" + reader.AttributeCount.ToString()); Console.WriteLine("Depth:" + reader.Depth.ToString()); Console.WriteLine("Line Number:" + reader.LineNumber.ToString()); Console.WriteLine("Node Type:" + reader.NodeType.ToString()); Console.WriteLine("Attribute Count:" + reader.value.ToString()); }  }  } 二十四、写XML文件： using System;  using System.Xml;  public class TestWriteXMLFile  {  public static int Main(string[] args)  {  try  {  // Creates an XML file is not exist  XmlTextWriter writer = new XmlTextWriter("C:\\temp\\xmltest.xml", null);  // Starts a new document  writer.WriteStartDocument();  //Write comments  writer.WriteComment("Commentss: XmlWriter Test Program";  writer.WriteProcessingInstruction("Instruction","

erson Record";  // Add elements to the file  writer.WriteStartElement("p", "person", "urnerson";  writer.WriteStartElement("LastName","";  writer.WriteString("Chand";  writer.WriteEndElement();  writer.WriteStartElement("FirstName","";  writer.WriteString("Mahesh";  writer.WriteEndElement();  writer.WriteElementInt16("age","", 25);  // Ends the document  writer.WriteEndDocument();  }  catch (Exception e)  {  Console.WriteLine ("Exception: {0}", e.ToString());  }  return 0;  }  }

翔羽 · 发表于 2006-3-29 08:33:50

这组帖子也非常好，大家可能更需要这样的代码积累。

emptyed · 发表于 2006-3-29 08:36:10

为什么发新帖，下面还要4个选项，什么html什么的 ，选不对，发出来的格式都不一样啊！搞的忒复杂了点了吧！

翔羽 · 发表于 2006-3-29 08:37:34

一般情况下你可以不用管，按照默认的就可以了。

ydiandian · 发表于 2006-3-31 18:23:52

不错的东西，等两天看C SHARP的时候借鉴哈了![em04]

adong5201 · 发表于 2006-4-16 20:13:13

谢谢楼主,获益菲浅

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[分享]C#入门代码集（2）

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