ArgumentOutOfRangeException while using XlsIO with Excel template - excel

Question

I am using SyncFusion XlsIo for exporting data to excel sheet. I am having some problems while exporting data to excel. I think I have problems in excel template. So first of all I want to know how can I create template for excel, so I can place values there ? I want to do similar thing which is in sample app provided by SyncFusion SDK. I tried to replicate that excel template but it didn't work and threw exception. Exception details are given below.
Exception : System.ArgumentOutOfRangeException was unhandled by user
code HResult=-2146233086 Message=Can't find property Parameter
name: strText Source=Syncfusion.XlsIO.WinRT ParamName=strText
StackTrace:
at Syncfusion.XlsIO.Implementation.TemplateMarkers.TemplateMarkersImpl.GetNextValue(Object
value, String& strText, String& newNumberFormat,
Type& newType)
at Syncfusion.XlsIO.Implementation.TemplateMarkers.TemplateMarkersImpl.SetSimpleValue(Object
value, String strText, IWorksheet sheet,
IMigrantRange migrantRange, IList`1 arrMarkerCells, IList
lstArguments, MarkerOptionsImpl options, RangeBuilder builder,
UnknownVariableAction
action, String numberFormat, Type valueType)
at Syncfusion.XlsIO.Implementation.TemplateMarkers.TemplateMarkersImpl.SetArrayValue(IList
value, String strText, IWorksheet sheet,
IMigrantRange migrantRange, IList`1 arrMarkerCells, IList
lstArguments, MarkerOptionsImpl options, RangeBuilder builder,
UnknownVariableAction
action, VariableTypeAction variableTypeAction)
at Syncfusion.XlsIO.Implementation.TemplateMarkers.TemplateMarkersImpl.SetUnknownVariable(Object
value, String strText, IWorksheet sheet,
IMigrantRange migrantRange, IList`1 arrMarkerCells, IList
lstArguments, MarkerOptionsImpl options, RangeBuilder builder,
UnknownVariableAction
action, VariableTypeAction variableTypeAction)
at Syncfusion.XlsIO.Implementation.TemplateMarkers.TemplateMarkersImpl.SetVariable(String
strVariable, String strText, IWorksheet sheet,
IMigrantRange migrantRange, IList`1 arrMarkerCells, IList
lstArguments, MarkerOptionsImpl options, RangeBuilder builder,
UnknownVariableAction
action)
at Syncfusion.XlsIO.Implementation.TemplateMarkers.TemplateMarkersImpl.ApplyMarker(IWorksheet
sheet, IList`1 arrCells, Int32 i, IMigrantRange
migrantRange, UnknownVariableAction action)
at Syncfusion.XlsIO.Implementation.TemplateMarkers.TemplateMarkersImpl.ApplyMarkers(IWorksheet
sheet, List`1 arrLabels, UnknownVariableAction
action)
at Syncfusion.XlsIO.Implementation.TemplateMarkers.TemplateMarkersImpl.ApplyMarkers(IWorkbook
book, UnknownVariableAction action)
at Syncfusion.XlsIO.Implementation.TemplateMarkers.TemplateMarkersImpl.ApplyMarkers(UnknownVariableAction
action)
at InvoiceExportDemo.ExportToExcel.d__0.MoveNext() in
d:\Projects\InvoiceExportDemo\InvoiceExportDemo\HelperClass
\ExportToExcel.cs:line 29
line : marker.ApplyMarkers(UnknownVariableAction.Skip);

Answer 1

This exception is raised due to the usage issue. Custom class property name and marker in the input template should match. Use the following procedure to create input template with marker and refer the sample provided.
Create input template with template marker:
Syntax :
%classname.PropertyName
Example :
%InvoiceItem.ItemName
Represents the above string in the excel file then in the sample use the below code snippet.
List<InvoiceItem> items = new List<InvoiceItem>();
items.Add(new InvoiceItem("Essential Studio WinRT", 1, 399, 50));
items.Add(new InvoiceItem("Essential ASP.NET ", 1, 995, 70));
//Create Template Marker Processor
ITemplateMarkersProcessor marker = book.CreateTemplateMarkersProcessor();
//Binding the business object with the marker.
marker.AddVariable("InvoiceItem", items);
//Applies the marker.
marker.ApplyMarkers(UnknownVariableAction.Skip);
Sample : Template_Marker_Sample.zip
Regards,
Johnson