c# - Data type mismatch in criteria expression exception -

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when run code gives me mismatch criteria exception"

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enter image description here

remove quotes amounts , category_id

"update products set amount=" + amount1 + " category_id=" + temp;

this build correct sql string.

btw encourage use query parameters queries https://msdn.microsoft.com/it-it/library/system.data.oledb.oledbcommand.parameters(v=vs.110).aspx


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