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Conditional Loop based on the Dataset
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nee2_020 Posts: 1
9/9/2020
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Hi,
I am new to SS.
I am trying to create an if..else conditional loop based on a value from a dataset instead of an extractor.
Can you please help me with this.
Thank you
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George @StresStimulus Administrator Posts: 566
9/9/2020
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In order to accomplish you can create a scriptable variable that would read the dataset and return “true” or “false” based on your required condition.
To create a scriptable variable you need to implement the IExternalVariable.GetValue() method and to access a dataset use the SessionContext.GetDatasource() method.
For example:
using System;
using StresStimulus.Extensibility;
using System.Data;
class ExternalCondition : IExternalVariable
{
public ExternalCondition()
{
//Do not edit this section.
}
#region IExternalVariable Members
/// <summary>
/// Return true if the variable will be evaluated once per VU iteration. Otherwise will be evaluated on every parameter.
/// </summary>
bool IExternalVariable.EvaluateOnIteration
{
get
{
return true;
}
}
/// <summary>
/// Return a value for the given session context.
/// </summary>
/// <param name="session">The session context object of the request consuming the variable.</param>
/// <returns>The source variable value.</returns>
string IExternalVariable.GetValue(SessionContext context)
{
DataTable dt = context.GetDatasource("{Your dataset name}");
return
((string)dt.Rows[context.VUNumber ]) == "xxxxxxxxx" ? //get the row associated the a VU
"true" :
"false";
}
#endregion
}
Then when creating a Condition (http://support.stresstimulus.com/display/doc52/If...Then) set the following properties:
1. Condition type property to Match scriptable variable
2. Scriptable variable to match property to Name of the scriptable variable.
3. Text-to-match property to "true"
- Cheers
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