public static IDataProvider GetProvider(string name)
{
//if (cachedProviders.ContainsKey(name))
//{
// return cachedProviders[name];
//}
ProviderConfigItem item = ProviderConfig.GetConfigItem(name);
IDataProvider provider = GetProvider(item.Assembly, item.Provider, item.ConnString);
//cachedProviders.Add(name, provider);
return(provider);
}
private static void LoadConfig()
{
string filePath = ConfigurationSettings.AppSettings["ProviderFilePath"];
filePath = AppDomain.CurrentDomain.BaseDirectory + filePath;
if (!File.Exists(filePath))
{
throw new FileNotFoundException();
}
using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
XmlDocument doc = new XmlDocument();
try
{
doc.Load(fs);
XmlNode rootNode = doc.SelectSingleNode("providers");
if (rootNode.HasChildNodes)
{
foreach (XmlNode node in rootNode.ChildNodes)
{
string name = node.Attributes["name"].Value;
if (cachedItems.ContainsKey(name))
{
throw new Exception(String.Format("The {0} provider has existed!", name));
}
ProviderConfigItem item = new ProviderConfigItem
{
Name = name,
Assembly = node.ChildNodes[0].InnerText,
Provider = node.ChildNodes[1].InnerText,
ConnString = node.ChildNodes[2].InnerText
};
cachedItems.Add(name, item);
}
}
}
catch (Exception e)
{
fs.Close();
throw new Exception(e.Message);
}
}
}
