...
Response Field to check: Body
Reference Name: VIEWSTATE
...
Regular
...
Expression:
...
id="_VIEWSTATE"
...
value="(
...
[\\
...
w/-_
...
].+)"
...
Template: $1$
Match No. : 1
Default Value: NOT FOUND
Response Field to check: Body
Reference Name: EVENTVALIDATION
...
Regular
...
Expression:
...
id="_EVENTVALIDATION"
...
value="(
...
[\\
...
w/-_
...
].+)"
...
Template: $1$
Match No. : 1
Default Value: NOT FOUND
Then in order to ensure these extracted values are passed in subsequent HTTP requests, for each request specify the following to be the Send Parameters for the Request:
Name: _VIEWSTATE
Value: ${VIEWSTATE}
Name: _EVENTVALIDATION
Value: ${EVENTVALIDATION}
...