实验程序：todolist

本次博客主要记录实验程序开发过程。

1 public void Save() 2         { 3             System.Text.StringBuilder report = new System.Text.StringBuilder(); 4             foreach (Task toDoItem in taskList) 5             { 6                 report.Append(toDoItem.TaskTitle.ToString() + "\t" + toDoItem.TaskDescription.ToString() + "\t" + toDoItem.TaskDueDate.ToString() + "\t" + toDoItem.TaskPriority.ToString() + "\t" + toDoItem.CreationDate.ToString() + "\t" + toDoItem.IsTaskComplete.ToString() + "\n"); 7             } 8  9             Microsoft.Win32.SaveFileDialog dlg = new Microsoft.Win32.SaveFileDialog();10             dlg.FileName = "ToDoList"; // Default file name11             dlg.DefaultExt = ".txt"; // Default file extension12             dlg.Filter = "Text documents (.txt)|*.txt"; // Filter files by extension13 14             // Show save file dialog box15             Nullable
     
       result = dlg.ShowDialog();16 17             // Process save file dialog box results18             if (result == true)19             {20                 // Save document21                 File.WriteAllText(dlg.FileName, report.ToString());22             }23         }//End Save()
     

上述代码主要实现将数据保存成TXT格式，存在本地文件下。

public void Load()        {            taskList.Clear();            Microsoft.Win32.OpenFileDialog dlg = new Microsoft.Win32.OpenFileDialog();            dlg.FileName = "ToDoList"; // Default file name            dlg.DefaultExt = ".txt"; // Default file extension            dlg.Filter = "Text documents (.txt)|*.txt"; // Filter files by extension             // Show open file dialog box            Nullable
     
       result = dlg.ShowDialog();            // Process open file dialog box results             if (result == true)            {                //Open document                 System.IO.StreamReader myFile = new System.IO.StreamReader(@dlg.FileName);                int lineCount = 0;                using (var reader = File.OpenText(@dlg.FileName))                {                    while (reader.ReadLine() != null)                    {                        lineCount++;                    }                }                for (int i = 1; i <= lineCount; i++)                {                    string myString = myFile.ReadLine();                    string[] obj = myString.Split('\t');                    taskList.Add(new Task { TaskTitle = obj[0].ToString(), TaskDescription = obj[1].ToString(), TaskDueDate = obj[2].ToString(), TaskPriority = obj[3].ToString(), CreationDate = obj[4], IsTaskComplete = Convert.ToBoolean(obj[5]) });                }//End for loop            }//End statement        } // end public bool Load()
     

对应的，从程序中读取与之绑定的本地数据。

前台界面设计如下

其中捕捉事件的button代码如下

1  private void addTask_Click(object sender, RoutedEventArgs e) 2         { 3             if (!taskTitleTextBox.Text.Equals(string.Empty) && !descriptionTextBox.Text.Equals(string.Empty) && !dateField.Text.Equals(string.Empty) && !priorityDropBox.Text.Equals(string.Empty)) 4             { 5                 toDo.addItem(taskTitleTextBox.Text, descriptionTextBox.Text, dateField.Text, priorityDropBox.Text); 6                 toDoListView.Items.Refresh(); 7                 ChangeUIState(UIState.AddState); 8                 isProgramSaved = false; 9             }10             else11             {12                 MessageBox.Show("Make sure all fields are filled in!", "Error", MessageBoxButton.OK, MessageBoxImage.Error);13             }14         }

其中包括对于任务时间 优先级 题目 及描述的填写判定

若全部填写则将数据添加进TEXT 若任何一项未填写 则返回error

 

相对来说 前台界面设计略简便于后台程序开发。