protected override void Render(HtmlTextWriter writer)
{
writer.Write("<br />1. Calling GetValue():<br /><br />");
try
{
string sAdminEmail = ConfigStore.GetValue("MyApplication", "AdminEmail");
writer.Write(string.Format("Retrieved '{0}' for AdminEmail <br />", sAdminEmail));
}
catch (InvalidConfigurationException e)
{
writer.Write(string.Format("Exception occurred : {0}", e));
}
writer.Write("<br /><br />2. Now calling GetMultipleValues():<br /><br />");
List <ConfigIdentifier> configIds = new List <ConfigIdentifier>();
ConfigIdentifier adminEmail = new ConfigIdentifier("MyApplication", "AdminEmail");
ConfigIdentifier workflowEmails = new ConfigIdentifier("MyApplication", "SendWorkflowEmails");
configIds.Add(adminEmail);
configIds.Add(workflowEmails);
try
{
Dictionary <ConfigIdentifier, string> configItems = ConfigStore.GetMultipleValues(configIds);
string sAdminEmails = ConfigStoreHelper.ReadDictionaryValue(configItems, adminEmail, string.Empty);
string sWorkflowEmails = ConfigStoreHelper.ReadDictionaryValue(configItems, workflowEmails, string.Empty);
writer.Write(string.Format("Retrieved '{0}' for AdminEmail <br />", sAdminEmails));
writer.Write(string.Format("Retrieved '{0}' for SendWorkflowEmails <br />", sWorkflowEmails));
}
catch (InvalidConfigurationException e)
{
writer.Write(string.Format("Exception occurred: {0}", e));
}
}
/// <summary>
/// Reads a value from a dictionary of config values retrieved by ConfigStore.GetValues(). This method ensures a meaningful
/// exception is thrown is a config value is not present so the missing value can be easily identified.
/// </summary>
/// <param name="ConfigItems">Dictionary of config values.</param>
/// <param name="ConfigID">ConfigIdentifier for the value to retrieve from dictionary.</param>
/// <param name="MissingValueMessage">Optional - the message to include in exception thrown when no config value is retrieved,
/// e.g. 'This config key should specify the ....'.</param>
/// <returns>String config value.</returns>
public static string ReadDictionaryValue(Dictionary <ConfigIdentifier, string> ConfigItems, ConfigIdentifier ConfigID,
string MissingValueMessage)
{
string sValue = null;
try
{
sValue = ConfigItems[ConfigID];
}
catch (KeyNotFoundException)
{
// throw more meaningful exception and trace..
MissingValueMessage = MissingValueMessage ?? string.Empty;
string sError = string.Format("No value found in Config Store for key " +
"{0}.{1}. {2}",
ConfigID.Category, ConfigID.Key, MissingValueMessage);
trace.WriteLineIf(traceSwitch.TraceError, TraceLevel.Error, "SafelyReadDictionaryValue(): {0}.", sError);
throw new ConfigurationErrorsException(sError);
}
return(sValue);
}
