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Andrew
375
custom column summary based on other column summaries.
posted

Hello,

I am using the MVC wrapper for the iggrid in my razor view and I am wondering if it is possible to create a custom column summary based on other column summaries. For example, say I have 3 columns: Price, Cost, and an unbound column called Margin. The Margin is just the Price minus the Cost all divided by the Price. I can get the individual row margins to calculate correctly simply with a formula in the unbound column but I can't figure out how to get the total margin for the entire dataset. All the examples of custom summaries I have seen only use the data from the column the custom summary is for. I need to get the totals from the Price and Cost columns in order to calculate my total Margin which I can't figure out if I can do.

thanks,

Andrew

 

Here is my relevant code:   

<script type="text/javascript">

function CalcMargin(data) {

var i, l = length, margin= 0; 

for (i = 0; i < l; i++) {

--Don't really know how to access other columns--       

}

return margin;}

</script>

             

//summaries

features.Summaries().Type(OpType.Local).ColumnSettings(settings =>

{settings.ColumnSetting().ColumnKey("Price").SummaryOperands(builder =>

{builder.SummaryOperand().Active(true).Type(SummaryFunction.Sum).RowDisplayLabel("Total");});

settings.ColumnSetting().ColumnKey("Cost").SummaryOperands(builder =>

{builder.SummaryOperand().Active(true).Type(SummaryFunction.Sum).RowDisplayLabel("Total");});

settings.ColumnSetting().ColumnKey("Margin").SummaryOperands(builder =>

{builder.SummaryOperand().Active(true).Type(SummaryFunction.Custom).RowDisplayLabel("Total").SummaryCalculator("$.proxy(CalcMargin, this)"); });

});