Emma's OneNote for Microsoft Windows, Office and Programming
There is a break change in IIS 7.5 on Windows 7 and Windows Server 2008 R2. The default identity for running an application pool is "ApplicationPoolIdentity". If you have a web application developed against application pools running with NETWORK SERVICE on IIS6/7, it might break after migrated to IIS 7.5 due to default application pool identity change.
After upgrading existing DotNet 2.0 or 3.5 application to DotNet 4.0, you might see following error message
Mixed mode assembly is built against version ‘v2.0.50727′ of the runtime and cannot be loaded in the 4.0 runtime without additional configuration information.
To fix this issue, put a config file next to your exe called <exename>.exe.config with the following content:
<configuration>
<startup useLegacyV2RuntimeActivationPolicy="true">
<supportedRuntime version="v4.0"/>
</startup>
</configuration>
Or if your exe already has config file, just append following <startup> element to config file.
<startup useLegacyV2RuntimeActivationPolicy="true">
<supportedRuntime version="v4.0"/>
</startup>
If your exe already has config file, just append following <startup> element to config file.
If you really want to knon more detail, check out Mark Miller’s post What is useLegacyV2RuntimeActivationPolicy for?
This code snippet demonstrates how to replace string in file using perl. This perl script takes in an input file, replaces the all string foo with bar.
my $file = $ARGV[0];
my $filetmp = "$ARGV[0].tmp";
open (INPUT, "< $file") or die("Unable to open $file");
open (TMP, "> $filetmp") or die("Unable to open $filetmp");
while(<INPUT>) {
if(/foo/) {
s/foo/bar/; # replace foo with bar
}
print TMP $_;
}
close(INPUT);
close(TMP);
rename $filetmp, $file;
If you install DotNet framework 4.0 on IIS server and then enable DotNet 3.0 or 3.5 WCF features, you might see following error when browse your application site made of ASP.NET 4.0 (or run on ASP.NET 4.0 application pool).
Could not load type ‘System.ServiceModel.Activation.HttpModule’ from assembly ‘System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089′.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.TypeLoadException: Could not load type ‘System.ServiceModel.Activation.HttpModule’ from assembly ‘System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089′.
To resolve this issue, run the following from command line:
aspnet_regiis.exe /iru
The aspnet_regiis.exe file can be found in either
The Microsoft Training Kit is free download that contains useful training resources. Here is a list of some latest useful training kits, the training content includes demo, videos, presentations, hands on lab and some code samples. Enjoy it
Apr 20 – Add Silverlight 4 Training
May 13 – Add Office 2010 and SharePoint 2010 Training Kit
June 9 – Add Windows Azure Platform Training Kit
Aug 16 – Update SQL Server 2008 R2 & Windows Azure Platform Training Kits
There is an easier way to get last element on a split operation, save split result to an array and use $array[-1] and this will access last element of the arrays.
$strings=”foo,bar,test”;
my @fields = split(/,/, $strings);
print $fields[-1] ; # the last str in $strings
This note is for a trick to use \Q and \E to escape characters for regular expression. You will find it very useful when you do string substitution and your pattern contains characters like slashes or backslashes .
This note is for a trick to use \Q and \E to escape characters for regular expression. You will find it very useful when you do string substitution and your pattern contains characters like slashes or backslashes .
Say you have a directory d:\bin and you want to add it to path environment at the beginning of your Perl script. Following code will do the trick.
my $dir="d:\\bin";
$ENV{PATH}.=";$dir";
Then $dir will be included in new $ENV{PATH}