public class CurrencyCodes
private static CurrencyCodes _instance; \/\/ Instance Of Self
private static DataTable dt = new DataTable(\"CurrencyCodes\");
public static CurrencyCodes Instance
{
get
{
if (_instance == null)
{
_instance = new CurrencyCodes();
}
return _instance;
}
}
private CurrencyCodes()
{
dt.Columns.Add(\"CurrencyCode\", typeof(String));
dt.Columns.Add(\"LastUpdated\", typeof(DateTime));
}
public String Search(String value)
{
DataRow[] rows = dt.Select(\"CurrencyCode='\" + value + \"'\");
if (rows.Count() == 1) return value;
return \"\";
}
public void Add(String value)
{
DataRow row = dt.NewRow();
row[\"CurrencyCode\"] = value;
row[\"LastUpdated\"] = DateTime.Now;
dt.Rows.Add(row);
}
public void ClearCache()
{
dt.Rows.Clear();
}
public void LoadCache(String xml)
{
StringReader theReader = new StringReader(xml);
dt.ReadXml(theReader);
}
public String SaveCache()
{
using (MemoryStream ms = new MemoryStream())
{
dt.WriteXml(ms);
ms.Position = 0;
StreamReader sr = new StreamReader(ms, System.Text.Encoding.UTF8);
return sr.ReadToEnd();
}
}
}
<\/pre>\nCalling the class<\/b><\/p>\n
Directory.SetCurrentDirectory(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments));
if (!Directory.Exists(\"YourSoftwareCache\"))
{
Directory.CreateDirectory(\"YourSoftwareCache\");
}
if (File.Exists(\"CurrencyCodes.XML\"))
CurrencyCodes.Instance.LoadCache(File.ReadAllText(\"CurrencyCodes.XML\"));
CachedCurrencyCodes cachedCurrencyCodes = CachedCurrencyCodes.Instance;
CurrencyCode = cachedCurrencyCodes.Search(Criteria);
<\/pre>\nNote<\/b> Comments have been stripped to clean up the posting. Always Comment Your Code.<\/p>\n