private async Task AddItemToFileAsync(StorageFolder folder, string fileName, ICsvItem item)
{
var lines = await FileIOEx.ReadFileAsync(folder, fileName, "Shift-JIS");
var isExist = false;
for (int i = 0; i < lines.Count; i++)
{
string[] cols = lines[i].Split(',');
if (cols[0] == item.CsvRawName)
{
lines[i] = item.GetCsvRaw();
isExist = true;
}
}
if (!isExist)
{
lines.Add(item.GetCsvRaw());
}
await FileIOEx.SaveFileAsync(folder, fileName, lines, "Shift-JIS");
}
private async Task RemoveItemToFileAsync(StorageFolder folder, string fileName, ICsvItem item)
{
var lines = await FileIOEx.ReadFileAsync(folder, fileName, "Shift-JIS");
var existIndex = -1;
for (int i = 0; i < lines.Count; i++)
{
string[] cols = lines[i].Split(',');
if (cols[0] == item.CsvRawName)
{
existIndex = i;
break;
}
}
if (existIndex != -1)
{
lines.RemoveAt(existIndex);
}
await FileIOEx.SaveFileAsync(folder, fileName, lines, "Shift-JIS");
}