I have prepared a Windows Mobile 5 VB app with Visual Studio 2005 with SQL CE. Occasionally when I update data entry to the SQL table with the following: Me.InventoryTransferTableA
I get the following error "@p5:String Truncation: max=14, len=15, value='IN-2"DUALPRTTHR
The referenced field is an inventory item number field that is type nchar with a length of 30. I can't determine where the max=14 is coming from.
Thank you in advance for your very appreciated assistance
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Thank you for your response,
I have checked the table schema and the length of the field is 30. I have also searched the entire project for the field name and it's length is 30 in all instances. I have searched the project for the number 14 and don't find any references to 14 as a field length or max.
Thanks again Raj,
As I understand it @p5 is the internal variable, related to Table field "ItemNumber" that Visual Studio puts Table Adapter values into for Update, and Insert commands like the following:
Me._adapter.UpdateCommand.
" @p3, [ToWhse] = @p4, [ItemNumber] = @p5, [Quantity] = @p6, [LotSerial] = @p7, ["& _
"FromBinLocation] = @p8, [ToBinLocation] = @p9 WHERE (([RecID] = @p10))"
I have searched the project for @p5, and again don't find a reference to the mysterious Len=14
Thanks to all that responded. I have found a solution. Below is a response by HTH to another similar question:
"It turns out that the code generator adds an entry param.DbType=DbType.String
All this is OK, I suppose, until you try to store a string that's shorter than the length of the column. SqlCe doesn't like that. The generated code doesn't pad out the string to the proper lengththat's up to us to do. If we want the data type to be nchar, that is.
When I discovered this after some testing I immediately changed all of my nchar data types to nvarchar, and everything worked fine."
I changed all of my fields from nchar to nvarchar in table schema and my problems were resolved.
It appears that SQL CE has either a bug or unusual design feature.
Again, Thanks for your help
Actually, nchar means that the field will only accept that many characters, so the values MUST be padded, nad the software does not do the padding by itself. On the other hand, nvarchar means that the field can accept UP TO that many characters, the actual space used is determined with the value is stored, and only the actual number of characters to be stored is what is actually used in the table. I almost NEVER use nchar(unless I know, for a fact, that the values passed will ALWAYS be of a fixed length), and ALWAYS use varchar or nvarchar.
AW
Arthur,
Thanks for this information. The reason I used nchar is because the application ends up creating a txt file with fixed length fields. I wasn't aware that I had to padd the fields. Most of the time it worked fine. and the fields were the correct length. I have changed to nvarchar to resolve my problem and I pad as needed when I create the .txt file.
Business Accounts
Answer for Membership
by: RajkumarGSPosted on 2009-10-31 at 03:58:14ID: 25709178
"String Truncation" error happens when we are trying to store a string that have more length than that permitted by the field in database/parameter.
Check in database for Field Size of the data type that causing error. When a string with more length is being tried to save to this field, this crash can occur.
--Raj