2024.09.28

202409/ConsoleApp1/Program.cs

@@ -1,5 +1,7 @@
 using ConsoleApp1.Animals;
 using ConsoleApp1.Cards;
+using System.Text;
+using System.Xml;
 
 namespace ConsoleApp1
 {
@@ -8,12 +10,158 @@ namespace ConsoleApp1
         static void Main(string[] args)
         {
             // h_PlayCards();
-            Animal animal = new Animal();
+            //Animal animal = new Animal();
-            Animal.MilkConsumerAreaInfo info = animal.GetAreaInfo();
+            //Animal.MilkConsumerAreaInfo info = animal.GetAreaInfo();
-            h_Afd();
+            //h_Afd();\
+            // h_InfoIO();
+            // File.Delete("123.csv");
+            // string sFn = "123.csv";
+            //h_WriteCsv(sFn);
+            //h_ReadCsv(sFn);
+
+            string sXmlFn = "123.xml";
+            h_WriteXml(sXmlFn);
+            h_ReadXml(sXmlFn);
             Console.ReadKey();
         }
 
+        private static void h_WriteXml(string sXmlFn)
+        {
+            if (File.Exists(sXmlFn)) File.Delete(sXmlFn);
+            if (File.Exists(sXmlFn)) return;
+            Console.WriteLine(DateTime.Now);
+            using (Stream ms = File.Create(sXmlFn))
+            {
+                using (XmlWriter sw = XmlWriter.Create(ms))
+                {
+                    sw.WriteStartDocument();
+                    sw.WriteStartElement("root");
+                    sw.WriteAttributeString("versionMy", "1.0");
+                    sw.WriteStartElement("items");
+                    for (int ii = 0; ii < 2999999; ii++)
+                    {
+                        sw.WriteStartElement("item");
+                        sw.WriteAttributeString("attr1", $"{ii}");
+                        sw.WriteString("content");
+                        sw.WriteEndElement();
+                    }
+
+                    sw.WriteEndElement();
+                    sw.WriteEndElement();
+                    sw.WriteEndDocument();
+                }
+            }
+
+            FileInfo fi = new FileInfo(sXmlFn);
+            Console.WriteLine($"{fi.Length / 1024 / 1024} Mb / {DateTime.Now}");
+
+        }
+
+
+        private static void h_ReadXml(string sXmlFn)
+        {
+            Console.WriteLine($"start {DateTime.Now}");
+            XmlDocument? x = new XmlDocument();
+            x.Load(sXmlFn);
+            // x.ChildNodes[0].ChildNodes[0].Attributes[0].Value...
+            Console.WriteLine($"end {DateTime.Now}");
+        }
+
+        private static void h_ReadCsv(string sFn)
+        {
+            using (Stream ms = File.OpenRead(sFn))
+            {
+                using (StreamReader sr = new StreamReader(ms, System.Text.Encoding.UTF8))
+                {
+                    sr.ReadLine();
+                    int iCount = 0;
+                    string sLine = String.Empty;
+                    Console.WriteLine(sr.ReadLine());
+                    while (!sr.EndOfStream)
+                    {
+                        iCount++;
+                        sLine = sr.ReadLine();
+                    }
+                    Console.WriteLine($"{iCount} // {sLine}");
+                }
+            }
+        }
+
+        private static void h_WriteCsv(string sFn)
+        {
+            if (File.Exists(sFn)) return;
+            using (Stream ms = File.Create(sFn))
+            {
+                using (StreamWriter sw = new StreamWriter(ms, System.Text.Encoding.UTF8))
+                {
+                    sw.WriteLine($"num;date");
+                    for (int ii = 0; ii < 99999999; ii++)
+                    {
+                        sw.WriteLine($"{ii};{DateTime.Now:mm.ss}");
+                    }
+                }
+
+            }
+            FileInfo fi = new FileInfo(sFn);
+            Console.WriteLine(fi.Length);
+
+        }
+
+        private static void h_InfoIO()
+        {
+            var pp = typeof(Program).GetType().Assembly.Location;
+            string sDirectory = Path.GetDirectoryName(pp);
+            // Path.GetFileNameWithoutExtension()
+            // Path.ChangeExtension()
+            // DirectoryInfo di = new DirectoryInfo(sDirectory);
+            // di.EnumerateFiles();
+            // Directory.EnumerateFiles()
+
+            using (MemoryStream ms = new MemoryStream(new byte[40960]))
+            {
+                ms.Seek(0, SeekOrigin.Begin);
+                byte[] buffer = new byte[4096];
+                ms.Read(buffer, 1, 4096);
+                int iB = ms.ReadByte();
+                using (StreamWriter sw = new StreamWriter(ms, System.Text.Encoding.UTF8))
+                {
+                    sw.WriteLine("qwr");
+                }
+                using (StreamReader sw = new StreamReader(ms, System.Text.Encoding.UTF8))
+                {
+                    string sLine = sw.ReadLine();
+                }
+
+            }
+            //Stream pFile = null;
+            //try
+            //{
+            //    pFile = File.Create("sa");
+            //    pFile.Seek(0, SeekOrigin.Begin);
+            //    byte[] buffer = new byte[4096];
+            //    pFile.Read(buffer, 1, 4096);
+            //    int iB = pFile.ReadByte();
+            //} finally
+            //{
+            //    pFile?.Dispose();
+            //}
+            using (FileStream fs = File.Create("sa"))
+            {
+                fs.Seek(0, SeekOrigin.Begin);
+                byte[] buffer = new byte[4096];
+                fs.Read(buffer, 1, 4096);
+                int iB = fs.ReadByte();
+            }
+            byte[] bt = File.ReadAllBytes("fn");
+            string sText = File.ReadAllText("fn", Encoding.UTF8);
+            string[] arLines = File.ReadAllLines("fn", Encoding.UTF8);
+        }
+
+        public static void h_XmlSax()
+        {
+            string sContent = @"";
+        }
+
         private static void h_Afd()
         {
             int ii = 0;
@@ -31,7 +179,7 @@ namespace ConsoleApp1
             //h_CountOddAndEven(ll);
         }
 
-        private static bool h_CountOddAndEven(List<int> ll, 
+        private static bool h_CountOddAndEven(List<int> ll,
             out int iEvenCount, out int iOddCount)
         {
             throw new NotImplementedException();

202409/ConsoleApp1/XMLFile1.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root versionMy="1.0">
+	<items>
+		<item attr1="aatrValue" attr2="aatr2Value">content</item>
+		<item attr1="aatrValue">content</item>
+		<item attr1="aatrValue" />
+	</items>
+</root>