SQL statement and If statement

I've problem, it's in sqlcommand it's in "where" condition, which if it's exist in sql the "ELSE" not work, and if the condition not in sqlcommand the "ELSE" appear, could someone help


it's in

selectcommand.CommandText = "SELECT Weekno FROM Weeks where Weekno='" + Weekno.Text + "'"

if i delete the condition the " ELSE " appear. otherwise it's not appear

whole code

Dim myconnection As New SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\football.mdf;Integrated Security=True;User Instance=True;MultipleActiveResultSets=True ")


Dim insertcommand As New SqlCommand

Dim selectcommand As New SqlCommand

Dim myreader As SqlDataReader

insertcommand.Connection = myconnection

insertcommand.CommandType = CommandType.Text

selectcommand.Connection = myconnection

selectcommand.CommandType = CommandType.Text


selectcommand.CommandText = "SELECT Weekno FROM Weeks where Weekno='" + Weekno.Text + "'"

myreader = selectcommand.ExecuteReader

If myreader.Read Then


If (Weekno.Text = myreader.Item("Weekno")) Then

Response.Write("already Exsit")



End If

End If




10/11/2008 10:18:01 PM
asp.net.sql-datasource 29906 articles. 0 followers. Follow

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What exactly you're trying to do with this code? Your reader loop should be WHILE not IF.

Beware of bugs in the above code; I have only proved it correct, not tried it.
(Donald Knuth)
10/12/2008 1:26:23 AM

 Your code seems to ask sql to return what was passed in.


Perhaps better would be 'select count(*) where weekno = @weekno.

If the reader returns 0 then the record does not exist, 


sorry C# dialect

int result = int.Parse(rdr[0].ToString());

if(result > 0)


 //record exists




//does not exist


Mark in St. Pete, FL
10/12/2008 1:44:11 AM

Thanks you brothers

but here am not trying to count the record.. idea is

i want to check the record if the same number the came from weekno.text are =(equal) to weekno in record if it's than it tell him that already exist if not in record count as new one..

i hope it's clear

thank so much for contributes..



10/12/2008 8:41:06 AM

With your select statement you already receive records with WeekNo = weekno.text  So, if your select returns 1 or more records, then you have records in your database with this number, otherwise you don't. That's why the previous reply with a count was a good one.

Beware of bugs in the above code; I have only proved it correct, not tried it.
(Donald Knuth)
10/12/2008 10:57:05 AM


    You have to pass the weekno.text to the query as parameter and this can be used in the where clasue.

Fi this condition comes to true means there is a record in the table otherwise there were no records in the table.

Following is the modified code:

selectcommand.CommandText = "SELECT Weekno FROM Weeks where Weekno='" + Weekno.Text + "'"

myreader = selectcommand.ExecuteReader

If myreader.Read Then

       Response.Write("already Exsit")



End If

Hope this helps you. You can acheive the same using count(*) as mentioned in the previous thread.

If this post was useful to you, please mark it as answer. Thank you!
10/12/2008 11:07:08 AM

Hi, thank you.. but in such case what to I should do

myCommand.CommandText = "SELECT CardSerialN,cardamount FROM card where CardSerialN='" & TextBox1.Text & "'"

myreader = myCommand.ExecuteReader

If myreader.Read Then

If (TextBox1.Text = myreader.Item("CardSerialN")) Then

If (DropDownList1.SelectedValue > myreader.Item("cardamount")) Then


"Not enoght amount")




End If


Response.Write("No number exist") End If


MsgBox("Wrong number ", MsgBoxStyle.Exclamation)

End If

which have multicases first user pass parameter "cardserial" if it's exsit ok, than also check the amount that user want to add it if it's bigger that exist in card wont allow it's less ok."general idea"

what happand here every condiation work unless

Response.Write("No number exist") 


so my question how i let the "ELSE" appear which happaned to me in both cases

And another thing it's I setup my database to take the date from Calander but i want to add the time also how do I do that

the record is smalldatetime type"10/3/2008 12:00:00 AM".. so how ?


Thanks you, and sorry for disturbance

10/13/2008 1:03:51 PM

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