Getting Exception "data type mismatch in criteria expression"

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during insertion in access DB....I m working with vb.net......I have insert value from text box to access DB and I m getting that exception every time....and I have insert " "(Blank String)....if textbox is empty....I didn't show the code it is confidential...help me as erly as possible....Thankx in advance...

Posted 14-Sep-11 4:23am

NikulDarji

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Simon_Whale · Answer 1 · 2011-09-14T06:25:00

Solution 1

Without seeing any table structures or code all I can tell you that the value you are trying to insert into your database is incorrect.

It would suggest to me that you are trying to insert values into a number based column (i.e. number, decimal etc.).

update your question with more information and we will be able to help you more.

Posted 14-Sep-11 6:25am

Simon_Whale

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NikulDarji 15-Sep-11 4:46am

Thank u very much for help...but i solved that error.....resone behind that error was....I m trying to store empty string value in databse and the empty string value in the command text (SQL) cannot be
stored in MS Access' where "Date/Time" data type specified by the
associated column....

Simon_Whale 15-Sep-11 4:52am

Glad to see that you solved it :) ADO.NET and dot net has problems with empty column types as they can't be null. I would have a look at the keyword nullable(of t) where t is the column type.

Only strings can hold a nullable value, but you can use nullable(of date), nullable(of integer) etc.

http://msdn.microsoft.com/en-us/library/b3h38hb0%28v=VS.90%29.aspx#Y912