vb.net - Error when saving from format(val(textbox.text), "#,##0") to numeric field type in SQL -


in sql server, have table this:

tableitem
------------------------
item | varchar (15),
price | numeric(18, 2)

in vb.net, have code: 

textbox1.text = "book"   textbox2.text = 20.000,00 textbox2.text  = format(val(textbox2.text), "#,##0.00")

procedure save : 

dim sqlquery string = "insert tableitem(item,price) values('" & textbox1.text & "','" & textbox2.text & "')"      try         conn.open()         cmd             .connection = conn             .commandtype = commandtype.text             .commandtext = sqlquery             .executenonquery         end  catch ex exception     msgbox("error @ : " & ex.message)     conn.close() end try

but getting error:

error converting data type varchar numeric

if change & textbox2.text & & val(textbox2.text) & in query, data stored 20 in price.

you not allowed assign 20.000,00 textbox2.text property. try:

textbox2.text = "20.00"

on note not pass variables directly sql insert query. try code below:

dim sqlquery string = "insert tableitem(item,price) values(@item, @price)"      try     conn.open()     cmd         .parameters.addwithvalue("@item, textbox1.text)         .parameters.addwithvalue("@price, textbox2.text)         .connection = conn         .commandtype = commandtype.text         .commandtext = sqlquery         .executenonquery     end     catch ex exception         msgbox("error @ : " & ex.message) end try conn.close()

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