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} catch { return false; } // return AcctInfoSet; } //=========================================================================== // GetAppRegistryKey - Return the selected key value //=========================================================================== /// <param name="KeyValueToGet"></param> /// <param name="PrimaryKey"></param> /// <param name="SecondaryKey"></param> /// <param name="RtnVal"></param> public static void GetAppRegistryKey(string ItemValueToGet, string PrimaryKey, string SecondaryKey, out string RtnVal) { // Setup defaults: string PrimaryKeyDefault = "Sterling"; string SecondaryKeyDefault = "ImpersonationAccount"; //----------------------------------------------------------------------// Get a reference to the Hive (TRAP ACCESS ERRORS): RegistryKey RegKeyRef; try { RegKeyRef = RegistryLocalMachineOpenSubKey("SOFTWARE"); } catch { // If we get an error here, we have no access; Return False: RtnVal = "ERROR - Unable to Access Registry!"; WriteEventLog("MyProgram",RtnVal,"ERROR",1000,"System Event"); return; } //----------------------------------------------------------------------// Find the Primary Entry first: if (PrimaryKey != "") { PrimaryKeyDefault = PrimaryKey; } if (SecondaryKey != "") { SecondaryKeyDefault = SecondaryKey; } // Loop through to find it: bool RootWasFound = false; foreach (string RegSubKeyRef in RegKeyRefGetSubKeyNames()) { string RegSubKeyName = RegSubKeyRefToString(); if (RegSubKeyName == PrimaryKeyDefault) { RootWasFound = true; break; } } if (RootWasFound == false) { // Return an error: RtnVal = "ERROR - MISSING PRIMARY KEY (" + PrimaryKey + ")"; WriteEventLog("MyProgram",RtnVal,"ERROR",1001,"System Event"); return; } else { // Now we want to check for the Secondary Key:
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bool WasFound = false; // Open the Root Entry: RegistryKey RootRegKeyRef = RegistryLocalMachineOpenSubKey("SOFTWARE"); RegKeyRef = RootRegKeyRefOpenSubKey(PrimaryKeyDefault); // Loop through to see if we can find the application registry key: foreach (string RegSubKeyRef in RegKeyRefGetSubKeyNames()) { string RegSubKeyName = RegSubKeyRefToString(); if (RegSubKeyName == SecondaryKeyDefault) { WasFound = true; break; } } // See if we found it and act as requested: if (WasFound == false) { RtnVal = "ERROR - MISSING SECONDARY KEY (" + SecondaryKey + ")"; WriteEventLog("MyProgram",RtnVal,"ERROR",1002,"System Event"); return; } else { // Get the key reference: RegistryKey AppRegKeyRef = RegKeyRefOpenSubKey(SecondaryKeyDefault); // Loop through to find it: bool SetRtnVal = true; // foreach (string ValName in AppRegKeyRefGetValueNames()) { string TestName = ValNameToString(); if (ItemValueToGet == ValNameToString()) { SetRtnVal = false; break; } } // Set the return value: if (SetRtnVal) { RtnVal = "ERROR - Registry item " + ItemValueToGet + " was NOT found"; WriteEventLog("MyProgram",RtnVal,"ERROR",1003,"System Event"); } else { RtnVal = (string)AppRegKeyRefGetValue(ItemValueToGet); } } } }
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Retrieving Impersonation Account from WebConfig
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As an alternative to the registry, account information can also be stored in the site s web config file While still pretty secure, any changes to this file require that an IISReset be performed, which can disrupt site users, and that it must be added to the webconfig file
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of each site collection if there is more than one Adding this requires adding a few XML statements to the webconfig file just before the </configuration> tag:
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<appSettings> <add key="ImpAcctDomainKey" value="MOSS" /> <add key="ImpAcctNameKey" value="MOSSAcct" /> <add key="ImpAcctPwdKey" value="M0SS123$" /> </appSettings> </configuration>
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If <appSettings> already exists (another app may have put it there), only add the Key entries Once done (and an IISReset is performed), the information is easily retrieved in code:
// SETUP IMPERSONATION ACCOUNT INFO: bool AcctInfoSet = true; try { // Note: keep this on one line (broken here for readability): IAccountName = SystemConfigurationConfigurationSettings AppSettingsGet("ImpAcctNameKey"); // Note: keep this on one line (broken here for readability): IAccountPwd = SystemConfigurationConfigurationSettings AppSettingsGet("ImpAcctPwdKey"); // Note: keep this on one line (broken here for readability): IAccountDomain = SystemConfigurationConfigurationSettings AppSettingsGet("ImpAcctDomainKey"); } catch { }
Writing to the System Event Log
Over time, you will probably discover that simply in-code error handling is not enough; particularly in web parts Most errors in SharePoint are trapped, so a problem can be very hard to determine Since installation (and security) settings in SharePoint vary from one system to the next, something that works just fine on one might break in another In a production environment, you are basically stuck You cannot debug the part nor determine the actual error to reproduce it The best solution is to use the System Application Event Log to trap errors and provide tracing messages Fortunately, NET has got you covered here because writing to the event log is easy; simply include the following routine:
using SystemDiagnostics; // Needed for Event Log //=========================================================================== /// WriteEventLog - Write an Event to the Event Log //=========================================================================== /// <param name="ApplicationName">Name of the Application</param> /// <param name="ErrMessage">Error, Warning or Info Message to post</param> /// <param name="MsgType">Type of message (ERROR, and so on)</param>
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