Лабораторная работа №6

ProjectCleaningCar/ProjectCleaningCar/CollectionGenericObjects/StorageCollection.cs

@@ -106,22 +106,23 @@ public class StorageCollection<T>
         {
             File.Delete(filename);
         }
-        StringBuilder sb = new();
+        using (StreamWriter writer = new StreamWriter(filename))
-        sb.Append(_collectionKey);
+        {
+            writer.Write(_collectionKey);
             foreach (KeyValuePair<string, ICollectionGenericObjects<T>> value in _storages)
             {
-            sb.Append(Environment.NewLine);
+                writer.Write(Environment.NewLine);
                 // не сохраняем пустые коллекции
                 if (value.Value.Count == 0)
                 {
                     continue;
                 }
-            sb.Append(value.Key);
+                writer.Write(value.Key);
-            sb.Append(_separatorForKeyValue);
+                writer.Write(_separatorForKeyValue);
-            sb.Append(value.Value.GetCollectionType);
+                writer.Write(value.Value.GetCollectionType);
-            sb.Append(_separatorForKeyValue);
+                writer.Write(_separatorForKeyValue);
-            sb.Append(value.Value.MaxCount);
+                writer.Write(value.Value.MaxCount);
-            sb.Append(_separatorForKeyValue);
+                writer.Write(_separatorForKeyValue);
 
                 foreach (T? item in value.Value.GetItems())
                 {
@@ -130,13 +131,11 @@ public class StorageCollection<T>
                     {
                         continue;
                     }
-                sb.Append(data);
+                    writer.Write(data);
-                sb.Append(_separatorItems);
+                    writer.Write(_separatorItems);
+                }
             }
         }
-        using FileStream fs = new(filename, FileMode.Create);
-        byte[] info = new UTF8Encoding(true).GetBytes(sb.ToString());
-        fs.Write(info, 0, info.Length);
         return true;
     }
 
@@ -151,52 +150,38 @@ public class StorageCollection<T>
         {
             return false;
         }
-        string bufferTextFromFile = "";
+        using (StreamReader reader = File.OpenText(filename))
-        using (FileStream fs = new(filename, FileMode.Open))
         {
-            byte[] b = new byte[fs.Length];
+            string line = reader.ReadLine();
-            UTF8Encoding temp = new(true);
+            if (line == null || line.Length == 0)
-            while (fs.Read(b, 0, b.Length) > 0)
-            {
-                bufferTextFromFile += temp.GetString(b);
-            }
-        }
-        string[] strs = bufferTextFromFile.Split(new char[] { '\n', '\r' },
-        StringSplitOptions.RemoveEmptyEntries);
-        if (strs == null || strs.Length == 0)
             {
                 return false;
             }
-        if (!strs[0].Equals(_collectionKey))
+            if (!line.Equals(_collectionKey))
             {
-            //если нет такой записи, то это не те данные
                 return false;
             }
             _storages.Clear();
-        foreach (string data in strs)
+            while ((line = reader.ReadLine()) != null)
             {
-            string[] record = data.Split(_separatorForKeyValue,
+                string[] record = line.Split(_separatorForKeyValue, StringSplitOptions.RemoveEmptyEntries);
-            StringSplitOptions.RemoveEmptyEntries);
                 if (record.Length != 4)
                 {
                     continue;
                 }
-            CollectionType collectionType =
+                CollectionType collectionType = (CollectionType)Enum.Parse(typeof(CollectionType), record[1]);
-            (CollectionType)Enum.Parse(typeof(CollectionType), record[1]);
+                ICollectionGenericObjects<T>? collection = StorageCollection<T>.CreateCollection(collectionType);
-            ICollectionGenericObjects<T>? collection =
-            StorageCollection<T>.CreateCollection(collectionType);
                 if (collection == null)
                 {
                     return false;
                 }
                 collection.MaxCount = Convert.ToInt32(record[2]);
-            string[] set = record[3].Split(_separatorItems,
+                string[] set = record[3].Split(_separatorItems, StringSplitOptions.RemoveEmptyEntries);
-            StringSplitOptions.RemoveEmptyEntries);
                 foreach (string elem in set)
                 {
-                if (elem?.CreateDrawningCar() is T car)
+                    if (elem?. CreateDrawningCar() is T ship)
                     {
-                    if (collection.Insert(car) == -1)
+                        if (collection.Insert(ship) == -1)
                         {
                             return false;
                         }
@@ -206,6 +191,7 @@ public class StorageCollection<T>
             }
             return true;
         }
+    }
 
     /// <summary>
     /// Создание коллекции по типу

ProjectCleaningCar/ProjectCleaningCar/FormCleaningCarCollection.cs

@@ -267,7 +267,15 @@ public partial class FormCleaningCarCollection : Form
     {
         if (openFileDialog.ShowDialog() == DialogResult.OK)
         {
-
+            if (_storageCollection.LoadData(openFileDialog.FileName))
+            {
+                MessageBox.Show("Загрузка прошла успешно", "Реузльтат", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                RerfreshListBoxItems();
+            }
+            else
+            {
+                MessageBox.Show("Не удалось загрузить", "Результат", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
         }
     }
 }