Passing parameters from Managed code to X++ in dataset

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In the user control code behing add an event handler to the CreatingDataSetRun event on the AxDataSource control

protected void Page_Init(object sender, EventArgs e)
{
this.AxDataSource1.CreatingDataSetRun += new EventHandler<CreatingDataSetRunEventArgs>(AxDataSource1_CreatingDataSetRun);
}Set the param value  to the event arugments

void AxDataSource1_CreatingDataSetRun(object sender, CreatingDataSetRunEventArgs e)

{

e.DataSetRunArgs.parm =

"4000";

}

 

In AOT override or add method in the data set and use element.args().parm() to received the paramter  

public void executeQuery()
{

 QueryBuildRange             custRange;
 ;
        custRange = SysQuery::findOrCreateRange(this.query().dataSourceNo(1), fieldnum(CustTable, AccountNum));
        custRange.value(element.args().parm());
   super();

}

You can also pass an Enum. For example

void

AxDataSource1_CreatingDataSetRun(object sender, CreatingDataSetRunEventArgs e)
{
e.DataSetRunArgs.parmEnumType = EnumMetadata.EnumNum(this.AxSession, "EPFormAction");
e.DataSetRunArgs.parmEnum(2);
}

public void init()
{
super();

if (element.args().parmEnumType() == enumnum(EPFormAction) && element.args().parmEnum() == EPFormAction::CreateMode)
{
//do somethign here

}
}