Лабораторная работа №6

ProjectCleaningCar/ProjectCleaningCar/CollectionGenericObjects/StorageCollection.cs

@@ -106,37 +106,36 @@ public class StorageCollection<T>
         {
             File.Delete(filename);
         }
-        StringBuilder sb = new();
+        using (StreamWriter writer = new(filename))
-        sb.Append(_collectionKey);
-        foreach (KeyValuePair<string, ICollectionGenericObjects<T>> value in _storages)
         {
-            sb.Append(Environment.NewLine);
+            writer.Write(_collectionKey);
-            // не сохраняем пустые коллекции
+            foreach (KeyValuePair<string, ICollectionGenericObjects<T>> value in _storages)
-            if (value.Value.Count == 0)
             {
-                continue;
+                writer.Write(Environment.NewLine);
-            }
+                // не сохраняем пустые коллекции
-            sb.Append(value.Key);
+                if (value.Value.Count == 0)
-            sb.Append(_separatorForKeyValue);
-            sb.Append(value.Value.GetCollectionType);
-            sb.Append(_separatorForKeyValue);
-            sb.Append(value.Value.MaxCount);
-            sb.Append(_separatorForKeyValue);
-
-            foreach (T? item in value.Value.GetItems())
-            {
-                string data = item?.GetDataForSave() ?? string.Empty;
-                if (string.IsNullOrEmpty(data))
                 {
                     continue;
                 }
-                sb.Append(data);
+                writer.Write(value.Key);
-                sb.Append(_separatorItems);
+                writer.Write(_separatorForKeyValue);
-            }
+                writer.Write(value.Value.GetCollectionType);
+                writer.Write(_separatorForKeyValue);
+                writer.Write(value.Value.MaxCount);
+                writer.Write(_separatorForKeyValue);
+
+                foreach (T? item in value.Value.GetItems())
+                {
+                    string data = item?.GetDataForSave() ?? string.Empty;
+                    if (string.IsNullOrEmpty(data))
+                    {
+                        continue;
+                    }
+                    writer.Write(data);
+                    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;
     }
 
@@ -151,59 +150,53 @@ public class StorageCollection<T>
         {
             return false;
         }
-        string bufferTextFromFile = "";
+        //using (FileStream fs = new(filename, FileMode.Open))
-        using (FileStream fs = new(filename, FileMode.Open))
+        //{
+            
+        //}
+        using (StreamReader reader = new(filename))
         {
-            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))
-        {
-            //если нет такой записи, то это не те данные
-            return false;
-        }
-        _storages.Clear();
-        foreach (string data in strs)
-        {
-            string[] record = data.Split(_separatorForKeyValue,
-            StringSplitOptions.RemoveEmptyEntries);
-            if (record.Length != 4)
-            {
-                continue;
-            }
-            CollectionType collectionType =
-            (CollectionType)Enum.Parse(typeof(CollectionType), record[1]);
-            ICollectionGenericObjects<T>? collection =
-            StorageCollection<T>.CreateCollection(collectionType);
-            if (collection == null)
             {
                 return false;
             }
-            collection.MaxCount = Convert.ToInt32(record[2]);
+            if (!line.Equals(_collectionKey))
-            string[] set = record[3].Split(_separatorItems,
-            StringSplitOptions.RemoveEmptyEntries);
-            foreach (string elem in set)
             {
-                if (elem?.CreateDrawningCar() is T car)
+                //если нет такой записи, то это не те данные
+                return false;
+            }
+            _storages.Clear();
+            while ((line = reader.ReadLine()) != null)
+            {
+                string[] record = line.Split(_separatorForKeyValue,
+                StringSplitOptions.RemoveEmptyEntries);
+                if (record.Length != 4)
                 {
-                    if (collection.Insert(car) == -1)
+                    continue;
+                }
+                CollectionType collectionType = (CollectionType)Enum.Parse(typeof(CollectionType), record[1]);
+                ICollectionGenericObjects<T>? collection = StorageCollection<T>.CreateCollection(collectionType);
+                if (collection == null)
+                {
+                    return false;
+                }
+                collection.MaxCount = Convert.ToInt32(record[2]);
+                string[] set = record[3].Split(_separatorItems,
+                StringSplitOptions.RemoveEmptyEntries);
+                foreach (string elem in set)
+                {
+                    if (elem?.CreateDrawningCar() is T truck)
                     {
-                        return false;
+                        if (collection.Insert(truck) == -1)
+                        {
+                            return false;
+                        }
                     }
                 }
+                _storages.Add(record[0], collection);
+                }
             }
-            _storages.Add(record[0], collection);
-        }
         return true;
     }
 

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", "Результат", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                RerfreshListBoxItems();
+            }
+            else
+            {
+                MessageBox.Show("Не удалось сохранить", "Результат", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
         }
     }
 }