private void SearchRateInFile()//this method will get rate from the data file and store it to a specific global Dictionary.
{
try
{
StreamReader ReadFile = new StreamReader("PersonnelFile.txt");
Waga_Tax Rate_Data = new Waga_Tax();
while (!ReadFile.EndOfStream)
{
string x = ReadFile.ReadLine();
string index = Rate_Data.getIndexFromString(x);
Rate_Data.AddRateToDictionary(index, Rate_Data.GetRateFromString(index, x));
}
ReadFile.Close();
}
catch (Exception e)
{
MessageBox.Show($"Sorry,seems something wrong:{Environment.NewLine}{e}", "Error");
}
}
private void OpenSavedFile()
{
try
{
StreamReader ReadFile = new StreamReader("PersonnelFile.txt");
PersonList list_data = new PersonList();
employee_list.ItemsSource = list_data.getEmptyArray();
//empty the list for new data list
List <string> NewDataList = new List <string>();
//This List is used to store new data come from the data file.
//Do not use Array because we do not know how many data it needs to store.
while (!ReadFile.EndOfStream)
{
string data_string = ReadFile.ReadLine();
NewDataList.Add(data_string);
}
string[] NewData = NewDataList.ToArray();
//convert List to Array, my class method based on Array as a parameter.
Waga_Tax Rate_Data = new Waga_Tax();
//As usual,the rate of every person will be stored into a Dictionary of Waga_Tax Class.
if (list_data.getCountFromDictionary() > 0)
//when the number of the list item is not 0, we need to keep the data which user has already added to list
//and add other existing data which is in the data file to list
{
foreach (string n in list_data.getArrayForList())
// Firstly,Traverse existing data of the list.
//
{
string Index_New = list_data.getIndexFromString(n);
foreach (string o in NewData)
//Secondly, compare existing data with new data which came from the data file.
{
string Index_Old = list_data.getIndexFromString(o);
//analyze and get the index of existing data through its string.
if (Index_New != Index_Old)
//when it is not an existing data, add it to Person List.
//if it is an existing data,we do not do anything,just keep what user enters.
{
list_data.Add_NewData(Index_Old, o);
Rate_Data.AddRateToDictionary(Index_Old, Rate_Data.GetRateFromString(Index_Old, o));
}
}
}
}
else
// when the list is empty,we do not have to check data,just add new data to the Dictionary
{
foreach (string d in NewDataList)
{
string index = Rate_Data.getIndexFromString(d);
list_data.Add_NewData(list_data.getIndexFromString(d), d);
Rate_Data.AddRateToDictionary(index, Rate_Data.GetRateFromString(index, d));
}
}
employee_list.ItemsSource = list_data.getArrayForList(); //updata ItemSource.
ReadFile.Close();
MessageBox.Show("Success!");
}
catch (Exception e)
{
MessageBox.Show($"Sorry,seems something wrong:{Environment.NewLine}{e}", "Error");
}
}
public void SaveDataFile()
{
try
{
StreamReader ReadFile = new StreamReader("PersonnelFile.txt");
// Declare an object for read text file.
List <string> Index_List = new List <string>();
List <string> Value_List = new List <string>();
//Declare two lists to store data.
//Index_List is used to get whether the data which user want to store has existed in the file.
//Value_List is used to store the data of specific Index.
PersonList list = new PersonList();
while (!ReadFile.EndOfStream)//read every single line to get data and store them into Index_List and Value_List.
{
string x = ReadFile.ReadLine();
Index_List.Add(list.getIndexFromString(x));
//list.getIndexFromString(x) is a method which PersonList offerd,it could analysis and return the Index according to a whole string data.
Value_List.Add(x);
}
ReadFile.Close();
foreach (string s in list.getArrayForList())
// Traverse existing data of the list.
{
string indexList_String = list.getIndexFromString(s);
//get its index string of the single line
if (!Index_List.Contains(indexList_String)) //if this a new data,just add it to the file.
{
StreamWriter WriteFile = new StreamWriter("PersonnelFile.txt", true);
WriteFile.AutoFlush = true;
WriteFile.WriteLine(s);
WriteFile.Close();
}
else //if this an old data, we need to replace it by new data..
{
string story = File.ReadAllText("PersonnelFile.txt");
//Declare a variable("story") to store the whole existing data.
string OldStr = Value_List[Index_List.IndexOf(indexList_String)];
//pick Oldstr up the to prepare to replace it.
story = story.Replace(OldStr, s); //replace OldStr by s(new data)
System.IO.File.WriteAllText(@"PersonnelFile.txt", string.Empty);
//Empty the whole old data in the file.
StreamWriter WriteFile = new StreamWriter("PersonnelFile.txt", true);
WriteFile.AutoFlush = true;
WriteFile.Write(story);
//Write the whole new data in the file
WriteFile.Close();
}
Waga_Tax Rate_Data = new Waga_Tax();
//Store the new data to Waga_Tax class since it needs these data to Check exist data.
//The benefit is does not have to read Data File every time when we want to get every person rate.
Rate_Data.AddRateToDictionary(s, Rate_Data.GetRateFromString(indexList_String, s));
}
MessageBox.Show("Success!");
}
catch (Exception e)
{
MessageBox.Show($"Sorry,seems something wrong:{Environment.NewLine}{e}", "Error");
}
}