markg28
asked on
Do .NET tableadapters truncate strings?
Hiya,
I'm having trouble figuring out the following so would appreciate some help...
I have a TableAdapter set up that includes an insert query to insert a lot of text data into a field in my database. However, it seems that the string is truncated to 1024 characters every time. I've checked external factors (IIS, sceurity, etc) and ruled those out - not least because another program using the same services CAN post >1024 chars - so that leaves my code.
I've checked that the data is not truncated in my code (it's stored as a string) and it is not.
The field is set up as a system.string in the tableadapter with a max length of 2147483647
The field is set up in my DB as a text
Why would the data get truncated? Is there an issue in .NET (v2 by the way) or in what I've done? Any advice greatly appreciated...
I'm having trouble figuring out the following so would appreciate some help...
I have a TableAdapter set up that includes an insert query to insert a lot of text data into a field in my database. However, it seems that the string is truncated to 1024 characters every time. I've checked external factors (IIS, sceurity, etc) and ruled those out - not least because another program using the same services CAN post >1024 chars - so that leaves my code.
I've checked that the data is not truncated in my code (it's stored as a string) and it is not.
The field is set up as a system.string in the tableadapter with a max length of 2147483647
The field is set up in my DB as a text
Why would the data get truncated? Is there an issue in .NET (v2 by the way) or in what I've done? Any advice greatly appreciated...
ASKER
Hi Peter,
I use SQL Mgmt Studio (Express) to view the DB contents. I've also just viewed the results using a new query window.
Interesting point though - hadn't considered that it could be the view...
Mike.
I use SQL Mgmt Studio (Express) to view the DB contents. I've also just viewed the results using a new query window.
Interesting point though - hadn't considered that it could be the view...
Mike.
ASKER
[edit] FWIW the field in the DB is actually 'ntext' not 'text'
Choose Tools/Options in the menu. Then choose Query Results/SQL Server/Results to text, change the Maximum number of characters... as needed. Max is 8192 though.
ASKER
Well... this made no difference :-) Not least becuase it was set to 256 and 1024 chars were still showing in my grid (which is set to 65535.
I will create a test program in ASP that will display the contents of the tbale - as that shouldn't be restricted to any characters surely? That will confirm that it isn't in the display - as I'm pretty sure it isn't that unfortunately (would be an easy fix if it were).
I will create a test program in ASP that will display the contents of the tbale - as that shouldn't be restricted to any characters surely? That will confirm that it isn't in the display - as I'm pretty sure it isn't that unfortunately (would be an easy fix if it were).
Yes, that could confirm it. Can you show us your insertioncode?
ASKER
OK, test code show truncated text from Db, so safe to assume that it's stored that way.
Code as below - *valueIRV* is the field that's being truncated - as described above, it's set in my TableAdapter as a system.string with maxlength of 2147483647. I haven't delved into the data layer designer.vb - should I?
Code as below - *valueIRV* is the field that's being truncated - as described above, it's set in my TableAdapter as a system.string with maxlength of 2147483647. I haven't delved into the data layer designer.vb - should I?
Dim qIRVUpdate As New tdDALTableAdapters.Candidates3_IRVTableAdapter
Dim qIRVdata As tdDAL.Candidates3_IRVDataTable = qIRVUpdate.GetIRVData(CandBlindID, InstrumentID, iLang, CurrentSectionName)
qIRVUpdate.InsertIRVData(tdAccountID, CandBlindID, InstrumentID, iLang, CurrentSectionName, itemIRV, valueIRV, Now())
I tried to mimic your code and it works well. Are you sure valueIRV is not truncated before InsertIRVData? Where does the text come from?
Also I do believe maxlength if you got ntext should be 1073741823.
How does the insertstatement look like in InsertIRVdata?
Also I do believe maxlength if you got ntext should be 1073741823.
How does the insertstatement look like in InsertIRVdata?
ASKER
The text comes from the FORM:
Dim valueString As String = ""
valueString = Request.Form(aryItemText(i
I've verified that this is the full string by writing it to a session object, just before the insert command - which showed the full text.
The InsertIRVdata query is as follows:
INSERT INTO [Candidates3_IRV] ([AccountID], [CandBlindID], [InstrID], [Lang], [SectionName], [ItemIRV], [ValueIRV], [DateCompleted]) VALUES (?, ?, ?, ?, ?, ?, ?, ?)
Not sure about the maxlength of ntext - obviously it's all auto-created by .NET as the tableadapter was created.
Thinking back, the DB field may not ahve been ntext historically and, although I've recrated the adapter since, could it be that it's still reverting back to the previous settings (despite showing a maxlength that should cope)? Would this be in the designer.vb file? Looked through and it seems to be set as per shown, but you never know...
Dim valueString As String = ""
valueString = Request.Form(aryItemText(i
I've verified that this is the full string by writing it to a session object, just before the insert command - which showed the full text.
The InsertIRVdata query is as follows:
INSERT INTO [Candidates3_IRV] ([AccountID], [CandBlindID], [InstrID], [Lang], [SectionName], [ItemIRV], [ValueIRV], [DateCompleted]) VALUES (?, ?, ?, ?, ?, ?, ?, ?)
Not sure about the maxlength of ntext - obviously it's all auto-created by .NET as the tableadapter was created.
Thinking back, the DB field may not ahve been ntext historically and, although I've recrated the adapter since, could it be that it's still reverting back to the previous settings (despite showing a maxlength that should cope)? Would this be in the designer.vb file? Looked through and it seems to be set as per shown, but you never know...
ASKER
[bump]
Can anyone help me please?!?!
Can anyone help me please?!?!
Are you sure it is not complete in the DB? Try something like this:
declare @mytext varcar(5000)
select @mytext = textcol from yourtable
print @mytext
declare @mytext varcar(5000)
select @mytext = textcol from yourtable
print @mytext
ASKER
Quite sure. Just ran the SQL you suggested and got the text truncated at 1024 again. Did the same by creating a test ASP page to output the DB contents also.
It must be how the data is inserted, I just can't figure out why it would truncate it...
It must be how the data is inserted, I just can't figure out why it would truncate it...
Have you tried changing the maxlength? I'm a C# guy so I'm not familiar with VB but you should be able to change that in designer?
ASKER
Cheers - I guess I could change the maxlength - hadn't really thought as it was showing that it was plenty big enough. Of course, that's assuming there isn't something funny going on - will give it a go on Monday and report back - much appreciated.
ASKER
Well... reporting back - changed the maxlength to 1,999,999,999 and still have same issue of data string being truncated at 1024chars. Verified by both DB check and also through ASP (not ASP.NEt in case the issue is specific to .NET) code to connect to DB and show contents.
Hmm. So, I guess what you're saying is that there isn't a known limit and there shouldn't be a problem posting this much data?
Will rebuild the table adapter and see if this helps, although looking through the designr.vb file, it all seems to be defined correctly.
Feel free to supply any futher top tips!!! Thanks.
Hmm. So, I guess what you're saying is that there isn't a known limit and there shouldn't be a problem posting this much data?
Will rebuild the table adapter and see if this helps, although looking through the designr.vb file, it all seems to be defined correctly.
Feel free to supply any futher top tips!!! Thanks.
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
Nope, same again; truncated.
OK, will get on and rebuild the adapter - cheers
OK, will get on and rebuild the adapter - cheers
ASKER
Whoo-hoo, it works!!! Rebuilding the tableadapter did it - it may have taken a while, but the definition must have been all screwy in my .xsd. Many thanks for your help everyone, very much appreciated indeed!
ASKER
Thank you for hanging in there with me!!!
How do you see that text is 1024 chars? If it's in query analyzer/SSMS you may have to increase maximum chars displayed in a column or change to grid view which usually display more characters.
/peter