Another way to parse log files is to use the ConvertFrom-String cmdlet, with which you can create a pattern file. You can easily extract two lines from your log file and replace the desired values with {%Name%:%Value%}. The following example demonstrates this approach for the dism.log log file:
#Reading content of log file - last 50 lines
$targetData = Get-Content C:WindowsLogsDISMdism.log -Tail 50
#2 example lines of code - replaced pattern values with {%Name%:%Value%}
$TemplateContent = @'
{Date*:2015-12-15} {Time:21:04:26}, {Level:Info} {Component:DISM} API: PID={PID:1472} TID={TID:5760} {Info:DismApi.dll: - DismInitializeInternal}
{Date*:2015-12-15} {Time:21:04:26}, {Level:Info} {Component:DISM} API: PID={PID:1472} TID={TID:5760} {Info:DismApi.dll: <----- Starting DismApi.dll session -----> - DismInitializeInternal}
'@
#Parse File
$parsedFile = $targetData | ConvertFrom-String -TemplateContent $TemplateContent
#Show parsed data
$parsedFile | Select-Object -First 50 | Format-Table -AutoSize -Wrap
Unfortunately, some complex log files having dynamic content will not always be correctly converted using this method. Therefore, you should always validate your retrieved information.