c# - Cannot convert datatype nvarchar to numeric -


i import data from excel file sql server database following query. excel file has values string types (' before every cells).

i error when import it."cannot convert datatype nvarchar numeric"

if remove 2 columns saleprice , price2 importing, import successful.

the datatypes of table 

create type [dbo].[inventorytype] table (    [localsku] [varchar](200) not null,    [itemname] [varchar](200) null,    [qoh] [int] null,    [price] [decimal](19, 4) null,    [discontinued] [bit] null,    [barcode] [varchar](25) null,    [integer2] [int] null,    [integer3] [int] null,    [saleprice] [decimal](19, 4) null,    [saleon] [bit] null,    [price2] [decimal](19, 4) null ) go

the query using is:

sqlcommand sqlcmd = new sqlcommand    (@"merge inventory target       using (select                 localsku, itemname, qoh, price, discontinued,                  barcode, integer2, integer3, saleprice, saleon, price2               @source) source on (source.localsku = target.localsku)       when matched          update             set itemname = source.itemname,                price = source.price,                discontinued = source.discontinued,                barcode = source.barcode,                integer2 = source.integer2,                integer3 = source.qoh,                saleprice = source.saleprice,                saleon = source.saleon,                price2 = source.price2;", sqlconn);  sqlparameter param; param = sqlcmd.parameters.addwithvalue("@source", dr); param.sqldbtype = sqldbtype.structured; param.typename = "dbo.inventorytype";  sqlconn.open(); sqlcmd.executenonquery(); sqlconn.close();

one thing keep in mind may have invalid data in given column that's throwing error(s). example if have numeric column , have letters or inproperly formatted numeric values, error thrown. check values in cells aren't correct first. includes trailing or leading spaces well.


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