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AnswerRe: how to run in local computer website Pin
OriginalGriff6-Jul-13 5:42
mveOriginalGriff6-Jul-13 5:42 
QuestionTo copy listbox values into gridview column Pin
vijaydhiva6-Jul-13 1:14
vijaydhiva6-Jul-13 1:14 
AnswerRe: To copy listbox values into gridview column Pin
Abhinav S6-Jul-13 2:40
Abhinav S6-Jul-13 2:40 
AnswerRe: To copy listbox values into gridview column Pin
Eddy Vluggen6-Jul-13 10:47
professionalEddy Vluggen6-Jul-13 10:47 
Questionc# error Pin
User34905-Jul-13 9:23
User34905-Jul-13 9:23 
AnswerRe: c# error Pin
jschell5-Jul-13 9:46
jschell5-Jul-13 9:46 
AnswerRe: c# error Pin
User34905-Jul-13 10:07
User34905-Jul-13 10:07 
AnswerRe: c# error Pin
Emmanuel Medina5-Jul-13 11:01
professionalEmmanuel Medina5-Jul-13 11:01 
Have you verified that your query string returns the appropiate data?

Does
zebra88 wrote:
dialog.FileName
and
zebra88 wrote:
txtdateref.Text
have appropiate values?

Sounds to me that ExecuteScalar is returning null.

According to the MSDN documentation[^] on the OleDbCommand:

Return Value
Type: System.Object
The first column of the first row in the result set, or a null reference if the result set is empty.

Check if it is indeed returning null, if it is, check your input.
If you think you can do a thing or think you can't do a thing, you're right - Henry Ford

Emmanuel Medina Lopez

GeneralRe: c# error Pin
User34905-Jul-13 11:36
User34905-Jul-13 11:36 
GeneralRe: c# error Pin
Emmanuel Medina8-Jul-13 3:42
professionalEmmanuel Medina8-Jul-13 3:42 
GeneralRe: c# error Pin
User34908-Jul-13 4:34
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GeneralRe: c# error Pin
User34906-Jul-13 8:16
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AnswerRe: c# error Pin
Mycroft Holmes5-Jul-13 15:09
professionalMycroft Holmes5-Jul-13 15:09 
AnswerRe: c# error Pin
Richard MacCutchan5-Jul-13 23:28
mveRichard MacCutchan5-Jul-13 23:28 
GeneralRe: c# error Pin
User34906-Jul-13 11:25
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GeneralRe: c# error Pin
NotPolitcallyCorrect6-Jul-13 11:35
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GeneralRe: c# error Pin
Eddy Vluggen6-Jul-13 12:35
professionalEddy Vluggen6-Jul-13 12:35 
GeneralRe: c# error Pin
User34906-Jul-13 13:15
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GeneralRe: c# error Pin
Eddy Vluggen9-Jul-13 9:55
professionalEddy Vluggen9-Jul-13 9:55 
GeneralRe: c# error Pin
Richard MacCutchan6-Jul-13 22:42
mveRichard MacCutchan6-Jul-13 22:42 
GeneralRe: c# error Pin
User34907-Jul-13 5:26
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GeneralRe: c# error Pin
Richard MacCutchan7-Jul-13 8:21
mveRichard MacCutchan7-Jul-13 8:21 
GeneralRe: c# error Pin
User34907-Jul-13 9:28
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GeneralRe: c# error Pin
Richard MacCutchan7-Jul-13 21:38
mveRichard MacCutchan7-Jul-13 21:38 
QuestionC# SQL SELECT query taking too long Pin
IceUK5-Jul-13 6:48
IceUK5-Jul-13 6:48 

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