Lr_eval_string Function In Loadrunner With Examples

It evaluates a parameter and after evaluating the parameter it replaces the parameter with its current value.

You cannot place lr_eval_string in the middle of the web functions or any other functions. You can directly use in the web functions like this {URL}. It will replace the parameter with its current value.

Example 1:

Action()
{
    lr_save_string("http://www.google.com","URL");
    lr_output_message("%s", lr_eval_string("{URL}"));

    return 0;
}

Output:

Starting action Action.

Action.c(3): Notify: Saving Parameter "URL = http://www.google.com".

Action.c(5): Notify: Parameter Substitution: parameter "URL" =  "http://www.google.com"

Action.c(5): http://www.google.com

Ending action Action.

Example 2:

Action()
{
    int a=10;
    lr_save_int(a,"IntegerValue");
    lr_output_message("%s", lr_eval_string("{IntegerValue}"));
    lr_output_message("%d", atoi(lr_eval_string("{IntegerValue}")));

    return 0;
}

Output:

Starting action Action.
Action.c(4): Notify: Saving Parameter "IntegerValue = 10".
Action.c(5): Notify: Parameter Substitution: parameter "IntegerValue" =  "10"
Action.c(5): 10
Action.c(10): Notify: Parameter Substitution: parameter "IntegerValue" =  "10"
Action.c(10): 10
Ending action Action.