Data type mismatch in criteria expression.

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So I'm attempting to push data into my local access database. All data being pushed is of the string data type.

Here is my code:

C#

com.Parameters.Add("@date", OleDbType.VarWChar).Value = date;                    
com.Parameters.Add("@system", OleDbType.VarWChar).Value = system;                    
com.Parameters.Add("@start", OleDbType.VarWChar).Value = start;                    
com.Parameters.Add("@end", OleDbType.VarWChar).Value = end;                    
com.Parameters.Add("@station", OleDbType.VarWChar).Value = station;                    
com.Parameters.Add("@coordse", OleDbType.VarWChar).Value = coordse;                    
com.Parameters.Add("@coordsn", OleDbType.VarWChar).Value = coordsn;

The columns in my database are of both Text and Date/Time format.
@date, @start, and @end are of the Date/Time format and the rest are of the Text data type.

I've tried some variations in the OleDbType but I can't seem to get the right combination.

Any ideas?

Posted 28-Sep-10 11:09am

GianniOD

Updated 29-Sep-10 3:59am

Sandeep Mewara

v2

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#realJSOP · Answer 1 · 2010-09-29T04:03:00

Solution 1

com.Parameters.Add("@date", OleDbType.VarWChar).Value = date;

You're setting the var type as a varchar. It should be a date type.

Posted 29-Sep-10 4:03am

#realJSOP

Hiren solanki · Answer 2 · 2010-09-29T04:10:00

Solution 2

use OleDbType.VarChar instead of OleDbType.VarWChar for text,

and use OleDbType.Date for the Date format data.

Please vote and Accept Answer if it Helped.

Posted 29-Sep-10 4:10am

Hiren solanki

Comments

GianniOD 29-Sep-10 10:54am

I tried both of these before but just to make sure I tried again. Still receiving the same error. Any other ideas of what could be causing this error?

GianniOD · Answer 3 · 2010-09-29T05:41:00

Solution 3

SOLVED

Some parameters that defined the format of the data in my database differed from the format of my strings in my program. Once I got them all matched up everything worked fine.

Thanks!

Posted 29-Sep-10 5:41am

GianniOD

Comments

Hiren solanki 30-Sep-10 1:38am

cool.