Infinity is not a valid value for Decimal

[Josip]

Hello,

I have one Expression column in grid grouping control. It showe result of dividing two numbers from two other columns. Unfortunately sometime those columns contains zeros so dividing is impossible. Anyhow I need to display data in grid so I'm wondering is there any way to avoid this error and display records?

[Arulpriya Ramalingam]

Hi Josip, 

Thanks for your interests in Syncfusion products. 

By default, Decimal return type does not support the infinity results. To overcome this issue, set the return type as Double for the ExpressionFieldDescriptor. Already we have provided the KB for this scenario. Please make use of below link, 

KB Link: https://www.syncfusion.com/kb/3444/how-can-i-resolve-the-exception-occurred-when-division-operation-is-used-in-expressiondescriptor 

 

Note 

If you want to return any message in ExpressionField instead of returning “0” or “infinity”, Custom method can be used to customize the Formula for ExpressionField. Please make use of below code and sample, 

Code snippet 

 

Custom method  

//DividedValue that returns DivideByZero if any of the argument value is zero else returns divided value 

private string DividedValue(string args) 

{ 

    // Get the list delimiter (for en-us, it is a comma). 

    char comma = Convert.ToChar(this.gridGroupingControl1.Culture.TextInfo.ListSeparator); 

    string[] arguments = args.Split(comma); 

   decimal arg1, arg2; 

 

    if (decimal.TryParse(arguments[0], System.Globalization.NumberStyles.Any, null, out arg1) 

&& decimal.TryParse(arguments[1], System.Globalization.NumberStyles.Any, null, out arg2)) 

    { 

        //returns DivideByZero if any of the column value is zero 

        if (arg1 == 0 || arg2 == 0) 

        { 

            return "DivideByZero"; 

        } 

        else 

            return Math.Abs(arg1 / arg2).ToString(); 

    } 

    return "Invalid input"; 

} 

 

 

Adding the custom method to Grid 

//Adding Custom function to Expression Field 

this.gridGroupingControl1.TableDescriptor.ExpressionFieldEvaluator.AddFunction("Divide", new ExpressionFieldEvaluator.LibraryFunction(DividedValue)); 

 

// Adding the Expressions using DividedValue function. 

ExpressionFieldDescriptor expField = new ExpressionFieldDescriptor("Divide", "Divide([CategoryName],[CategoryID])", typeof(System.String)); 

 

//Adding the custom ExpressionField to Grid 

this.gridGroupingControl1.TableDescriptor.ExpressionFields.Add(expField); 

Screenshot 

 

UG Link: https://help.syncfusion.com/windowsforms/gridgrouping/expression-fields#adding-custom-function  

Sample Link: http://www.syncfusion.com/downloads/support/forum/129489/ze/CustomExpressionField-1658845516  

Regards, 

Arulpriya