Question

I am using following query to insert some large text data :

internal static string InsertStorageItem =
            "insert into Storage(FolderName, MessageId, MessageDate, StorageData) values ('{0}', '{1}', '{2}', @StorageData)";

and the code I am using to execute this query is as follows :

string content = "very very large data";
string query = string.Format(InsertStorageItem, "Inbox", "AXOGTRR1445/DSDS587444WEE", "4/19/2010 11:11:03 AM");
var command = new SqlCeCommand(query, _sqlConnection);
var paramData = command.Parameters.Add("@StorageData", System.Data.SqlDbType.NText);
paramData.Value = content;
paramData.SourceColumn = "StorageData";
command.ExecuteNonQuery(); 

But at the last line I am getting this following error :

 System.Data.SqlServerCe.SqlCeException was unhandled by user code
Message=The data was truncated while converting from one data type to another. [ Name of function(if known) =  ]
Source=SQL Server Compact ADO.NET Data Provider
HResult=-2147467259
NativeError=25920
StackTrace:
       at System.Data.SqlServerCe.SqlCeCommand.ProcessResults(Int32 hr)
       at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommandText(IntPtr& pCursor, Boolean& isBaseTableCursor)
       at System.Data.SqlServerCe.SqlCeCommand.ExecuteCommand(CommandBehavior behavior, String method, ResultSetOptions options)
       at System.Data.SqlServerCe.SqlCeCommand.ExecuteNonQuery()
       at Chithi.Client.Exchange.ExchangeClient.SaveItem(Item item, Folder parentFolder)
       at Chithi.Client.Exchange.ExchangeClient.DownloadNewMails(Folder folder)
       at Chithi.Client.Exchange.ExchangeClient.SynchronizeParentChildFolder(WellKnownFolder wellknownFolder, Folder parentFolder)
       at Chithi.Client.Exchange.ExchangeClient.SynchronizeFolders()
       at Chithi.Client.Exchange.ExchangeClient.WorkerThreadDoWork(Object sender, DoWorkEventArgs e)
       at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
       at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)
InnerException: 

Now my question is how am I supposed to insert such large data to sqlce db?

Regards,

Anindya Chatterjee

http://abstractclass.org

Answer 1

Have you read the docs for ntext data type?

Variable-length Unicode data with a
maximum length of 230 – 1
(1,073,741,823) characters. Storage
size, in bytes, is two times the
number of characters entered

Is your very large content greater in size than the maximum? If so you’re out of luck – you need a data type which can store more data than ntext. My suggestion: varbinary(MAX) or Image.