DataSet does not support System.Nullable<>.(Please Tell me solution)

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var query = (from i in inven.InvoiceDetailwpfs

select i).ToList();
InvoicePrint rept = new InvoicePrint();
rept.Load(@"InvoicePrint.rpt");
rept.SetDataSource(query);
PrintInvoice pir = new PrintInvoice();
pir.crystal_invoice.ViewerCore.ReportSource = (rept);

Posted 22-Aug-15 4:35am

Member 11899483

Updated 22-Aug-15 4:36am

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Manas_Kumar · Answer 1 · 2015-08-22T06:44:00

You are using LINQ to fetch records and bind list to report. It seems some column value is NULL in linq query which doesn't support dataset in report.

In order to resolve your problem please use anonymous type and check null value of columns.

C#

var query = (from i in inven.InvoiceDetailwpfs
select new 
{ 
	columnName1 = i.columnName1 ?? 0.0
	columnName2 = i.columnName2 ?? "No Value"
}).ToList();

Here it is checking null value and assigning some blank value to it.

You need to change ColumnName1, ColumnName2 as per your dataset column name and assign blank as per column datatype.