How Do I Read An Extended Property Of A Database In Code?
May 8, 2006
I have recently had the need to create a utility program to upgrade the schema of an existing database for users of my program at install time. I will be using SQL Management Studio to generate the change scripts the program will use, but I will need some kind of way to know what version of the database a user has installed.
After poking around in SQL Management Studio I found a place for "Extended Properties" on a database, and I thought this would be the perfect place to add a property called "SCHEMA_VERSION" to know what version of the database is installed.
I have no idea how to read and update this value in code though. Can someone provide a small example on how to read and update an extended property on a database? Any .NET language example is welcomed; C# is preferred. Thanks in advance!
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Jun 16, 2006
I am having problems exporting data into a flat file using specific code page. My application has a variable "User::CodePage" that stores code page value (936, 950, 1252, etc) based on the data source. This variable is assigned to the CodePage property of desitnation file connection using Property expression.
But, when I execute the package, the CodePage property of the Destination file connection defaults to the initial value that was set for "User:CodePage" variable in design mode. I checked the value within the variable during runtime and it changes correctly for each data source. But, the property of the destinatin file connection doesn't change and results in an error.
[Flat File Destination [473]] Error: Data conversion failed. The data conversion for column "Column01" returned status value 4 and status text "Text was truncated or one or more characters had no match in the target code page.".
[DTS.Pipeline] Error: The ProcessInput method on component "Flat File Destination" (473) failed with error code 0xC02020A0. The identified component returned an error from the ProcessInput method. The error is specific to the component, but the error is fatal and will cause the Data Flow task to stop running.
If I manually update the variable with correct code page and re-run the ETL, everything works fine. Just that it doesn't work during run-time mode.
Can someone please help me resolve this.
Thanks much.
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Oct 31, 2006
hi,
Can anyone tell me how to use the extended stored property like sp_addextendedproperty in java code?
Thanks,
Meghna
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Sep 11, 2007
Hi,
Is there an easy way (a sql script) to drop the "MS_Description" of all tables and all columns in my database?
Regards,
Alejandroo
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May 8, 2002
Please help to find an example of the code written on VC++ for an extended stored procedure (dll) for SQL Server 2000.
Thanks
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Jul 12, 2007
Hi,
I am using vs2005, vc++, sql2005 and trying to write a complex extended stored procedure.
It seems I must use switch clrafe for my executable to deploy to sql.
But with clrafe, I can no longer use such c code tools such as typedef structures and pointer manipulation!
But I need to do these things to translate a contiuous block of binary data into a series of field/value pairs to be written to the sql server!!! Doing so externally would mean a severe drop in throughput: going back to the server for each field instead of all as one block!
Is there a technique, or pragma command to allow "unmanaged" c code to reside in a sql extended stored procedure?
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Jun 19, 2015
I am setting up extended events more or less just fine, however I am a bit confused as to how to read and load them into a table for querying. In particular the offset part - is there a way to load just a given dates worth in?
I've got the files configured to be 20MB before rolling over, the XE is running all the time.
So if i load in the full file now, say that covers 2.5 days worth, when I load it again tomorrow to get the updated data I'm also reloading today, which is a waste?
I presume I am going about this wrong, but lack an example that really goes into detail of practicalities of loading this data.
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Mar 8, 2007
You can set the default value of a reporting services parameter by any expression.
But with code I'm NOT allowed to do:
Parameters!myParam.Value = CDate("01.01.2007")
This is cause Value property is read-only.
So the question would be:
Are there any way I set a parameter value in runtime ?
Hope anyone can help...
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Aug 8, 2007
Background€¦
We€™re receiving the data as flat files, when I open up the file in notepad the characters look like the error€™d examples (see below). Open the file up in a texteditor where you can apply code page 1252 it display the characters correctly, which is expected behaviour!
I use SSIS to load these files into my database, applying the correct code page€¦
€¦however the data gets loaded in the incorrect form. Plus the database is collation €˜SQL_Latin1_General_CP1_CI_AS€™ which is code page 1252 so I can€™t see why I am getting these issues.
This is an example of the Umlaut (German chars) issues were getting, they€™re appearing in the database like this€¦.
tuid travelproductid lastname
1741869 6 P€?hls
1792950 6 Sch€žfer
2087798 6 L€?schhorn
2089010 6 Sagemller
2314086 6 Jnger
€¦& should be€¦
1741869 6 Pöhls
1792950 6 Schäfer
2087798 6 Löschhorn
2089010 6 Sagemüller
2314086 6 Jünger
I think it€™s a bug with SSIS, I know having a Unicode file would certainly solve this but I don't have that option.
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Jan 12, 2012
i attached adventure works in sql server 2008 and it showing as read only ,make it read write or remove read only tag from database.
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Jul 20, 2005
Hi,I'm developing an application to crypt SQL databases and i need toread SP and Views source code from VB6, if you know how to do thisplease answer me.Greetings.
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Jan 18, 2008
I have two database files, one .mdf and one .ndf. The creator of these files has marked them readonly. I want to "attach" these files to a new database, but cannot do so because they are read-only. I get this message:
Server: Msg 3415, Level 16, State 2, Line 1
Database 'TestSprintLD2' is read-only or has read-only files and must be made writable before it can be upgraded.
What command(s) are needed to make these files read_write?
thanks
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Jun 27, 2014
i have a database which get refreshed every day from client's data . and we need to pull heavy data from them every day as reports . so only selects happens on that database.
we do daily population of some table in some other databases from this daily refreshed DB.
will read uncommitted or NOLOCK with select queries to retrieve data faster.
there will be no dirty read as there are NO DML operation in that database so for SELECT which happens concurrently on these tables , will NOLOCK work?
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Feb 20, 2004
hi
have a problem ...
I tried to test my statement in QA as it returns no dataset ,it gives me empty columns in return,I though it will return all the columns and some records of (lmeyer) as the current user ,who logged in on windows auth,but it return only the columns,is that means my query analyser cannot read the login1 ,column which has the username as (lmeyer)
select * from tstudents where (login1='@param1')
if not what could me wrong in my code ,because I get no response to the sql server
Public Function login(ByVal login1 as string) as dataset
Dim myconnection as new sqlconnection("server=G103-TT03;database=CampusLANDB;Trusted_Connection=yes")
dim mycommand as new sqlcommand ("Select * from tStudents Where login1 = @param1",myconnection)
mycommand.parameters.add(new SQLClient.SqlParameter("@param1",login1))
dim DS as new dataset()
try
myconnection.open
dim adpt as new sqldataadapter
adpt.selectcommand = mycommand
adpt.fill(DS,"tStudents")
catch ex as exception
throw new exception(ex.message)
return nothing
finally
myconnection.close
end try
try
mydatagrid.datasource=DS.Tables("tStudents")
mydatagrid.databind()
catch ex as exception
errorlabel.text=ex.message
end try
return DS
End Function
thankx in advance
pamela mkosana
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Feb 23, 2007
Hi, I get the following error message error : "the setup failed to read IISmimemaptable the server code is 2147024893" and I cannot uninstall SQL Server 2005. Any idea this is happening. thanks!
chi
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May 15, 2008
i have created the folowing function but keep geting an error.
Only functions and extended stored procedures can be executed from within a function.
Why am i getting this error!
Create Function myDateAdd
(@buildd nvarchar(4), @avdate as nvarchar(25))
Returns nvarchar(25)
as
Begin
declare @ret nvarchar(25)
declare @sqlval as nvarchar(3000)
set @sqlval = 'select ''@ret'' = max(realday) from (
select top '+ @buildd +' realday from v_caltable where realday >= '''+ @avdate +''' and prod = 1 )a'
execute sp_executesql @sqlval
return @ret
end
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Apr 17, 2008
Hi,
I developed a simple custom control flow component which has several read/write properties and one readonly property (lets call it ROP) whichs Get method simple returns the value of a private variable (VAR as string). In the Execute method the VAR has a value assigened. When I put the value of ROP or VAR into MsgBox I can see the correct value. However when I execute the component I can not see the value of the ROP in the property window. I see the property but its value is empty string. For example when I put a breakpoint to postexecute or check the property before click OK in a MsgBox I would expect that the property value would be updated in SSIS as well. Is there a way how to display correct values of custom tasks properties in property window?
Thanks for any hints.
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May 7, 2008
Untill recently I had a smooth running SSIS package,but suddenly it throws error syaing
"OnError,,,,,,,The result of the expression
"@[User:trTextFileImpDirectory] +"SomeTextStringHere"+ @[User:trANTTextFileName] +(DT_STR,30,1252) @[User:taging_Date_Key]+ "SomeTextStringHere"
" on property "ConnectionString" cannot be written to the property. The expression was evaluated, but cannot be set on the property."
I have child SSIS package running under a parent package (through execute package task)
I have few flat file connection managers in child package for text file import , in which I am building text file path dynamically at run time by assigning an expression in connection string property of connection manager.
The Expression is as follows
"@[User:trTextFileImpDirectory] +"SomeTextStringHere."+ @[User:trANTTextFileName] +(DT_STR,30,1252) @[User:taging_Date_Key]+ +"SomeTextStringHere"
Where @[User:trTextFileImpDirectory] is a variable which contains path of directory containg text
files.Value in this variable is assigned at runtime from parent package's variable,which in turns fetch
value from a configuration file on local server.
With my current configuration this path has been configured to some other server's directory over network ( I.e my package picks text files from some other servers folder over network)
While
"Some string here"+ @[User:trANTTextFileName]" part of file name string.
(DT_STR,30,1252) @[User:taging_Date_Key] Contain the date of processing ,value in this variable is also picked up at run time from parent package variable.
1) So can someone give me some insight into possible reason of failures.
2) Is it possible that problem arises if directory (from which I m picking text files) is assigned password or is there exist some problem in accessing forlders over network ?
3) Or there can be some problem in package configuration at design time( I.e where I m assigning value in variable from parent package vriables)?
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Jul 29, 2007
I am getting this error while selecting the properties of one database.
Property Owner is not available for Database '[TEST]'. This property may not exist for this object, or may not be retrievable due to insufficient access rights. (Microsoft.SqlServer.Smo)
Suddently this error started coming ? why ?
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Jan 4, 2006
Hi !!
I need some inputs for designing Property Database
Property Types:
Condo/Townhouse
Single Family Home
Multi Family Home
Rental
Property Features
Sq Ft
# Of floors
New Construction
Carpeted Floors
Hardwood Floors
Living Room
Formal Dining Room
# of Bedrooms
# of Bathrooms
Den/Office
Water : City or Private
Sewer: City or Septic
Family Room and more
Lot Features
Mountain View
Golf Course Lot
Golf Course View and More
Community Features
Boating
Golf
Gym
Swimming and More
Here is what I am thinking:
1) I probably don't need any table for Property Type as I can hard code them into Drop Down List
2) Water and Sewer feature can de coded into Drop Down List too
3) How rest of the table design should work?
Table called Property, Lot Feature, Community Feature, Property_Lot, Property_Community
Property Table has PropertyID (P1, P2, P3) and other Info
Lot Feature has Lot Feature ID (L1, L2, L3) and
Community Feature has (C1, C2, C3)
Property can have zero or More Lot Feature
so Property_Lot table will have:
P1, L1
P1, L2
P1, L3
P2, L3
P3, L1
Property can have zero or more Community Feature, so Property_Community
P1, C1
P2, C1
P2, C2
P3, C3
Is this right?
How do we design search query?
I think query will be dynamic query? correct?
Thanks !!!!
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Mar 3, 2007
Hi,
As per my understanding, if the user instance property is set to true for an express database then it is not multiuser/shared. A copy of the database is made for each user so he works on his private data. On the other hand, if user instance property is set to false then the express database is multiuser/shared. Thus different users will connect to the same instance of the database and changes by one user will be seen by the other users.
Now, if we use an express database with asp.net and our application is installed on IIS then it is mandatory for the express database to have the user instance property set to true. But we see that in this case when different users visit our website, the data they enter goes into the same common database, ie. all the users share the same common database, even though user instance is true for the express database.
Please shed some light to explain the correct functionality of the user instance property as related to the express database.
Regards, Sandy
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May 9, 2012
I'm taking a database(read-only) backup from one server and restoring it on other server. As soon as restore is done it is bringing database into single-user read-only mode.
why it is bringing the database into single user mode ?
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Jan 28, 2004
Can you write a stored procedure to add a user to your DB and set the roles the user belongs to?
I want to write a stored proc. to add users and set roles so it can be used in code instead of doing it manually.
After the user has been added and their roles set, can you write another stored proc. to give you what roles they belong to?
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Mar 4, 2006
I'm new to ASP.NET (I normally work with Windows Forms) and have installed the Club Website Starter Kit. I created an Administrators role and a user called "admin". When I run the project locally, everything works as it should - I can log in as admin and I can create new users.
I then copied the site to localhost (C:Inetpubwwwroot), but when I run the site from localhost, I can't log in (as admin or any other user); instead I get a message that says, "Your login attempt was not successful. Please try again."
Also, I can't create a new user. When I try, I get the following error:
Server Error in '/' Application.
Failed to update database "C:INETPUBWWWROOTAPP_DATAASPNETDB.MDF" because the database is read-only.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Failed to update database "C:INETPUBWWWROOTAPP_DATAASPNETDB.MDF" because the database is read-only.Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[SqlException (0x80131904): Failed to update database "C:INETPUBWWWROOTAPP_DATAASPNETDB.MDF" because the database is read-only.]
System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +857242
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +734854
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +1838
System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +149
System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) +886
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) +132
System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) +415
System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +135
System.Web.Security.SqlMembershipProvider.CreateUser(String username, String password, String email, String passwordQuestion, String passwordAnswer, Boolean isApproved, Object providerUserKey, MembershipCreateStatus& status) +3612
System.Web.UI.WebControls.CreateUserWizard.AttemptCreateUser() +305
System.Web.UI.WebControls.CreateUserWizard.OnNextButtonClick(WizardNavigationEventArgs e) +105
System.Web.UI.WebControls.Wizard.OnBubbleEvent(Object source, EventArgs e) +453
System.Web.UI.WebControls.CreateUserWizard.OnBubbleEvent(Object source, EventArgs e) +149
System.Web.UI.WebControls.WizardChildTable.OnBubbleEvent(Object source, EventArgs args) +17
System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +35
System.Web.UI.WebControls.Button.OnCommand(CommandEventArgs e) +115
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +163
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102
Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42
I figure there must be a simple(?) explanation and solution for this problem, and ideally, some sort of step-by-step procedure that new users to ASP.NET can follow to configure a site - such as one of the starter kits - to work correctly. I can honestly say that trying to get this working has been an extremely frustrating experience.
If someone could help me out, I would really appreciate it. I've been working on this for two days and feeling I have hit the wall.
Thanks in advance.
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Mar 28, 2006
Hi there,I am getting a real problem with ASP.NET 2.0, all i am trying to do is run a recovert password (using the login controls) and i got the following error.Does anybody know how to fix this? I have tried the SSEUTIL answer here and it didn't work. http://forums.asp.net/909168/ShowPost.aspxI also ensured that Network Services user has READ/WRITE/EXECUTE premissions on the directory below and that each file isn't read only and also that it inherits ACL from the directory which it seems to do..Bit of strange one this, it isn't created (and i am not using) a beta version of VS 2005 Pro... but a full retail version.The PC is the local PC with IIS 5.1 and VS installed... it is the one i am using for developing.. I don't need to copy my files to the IIS directory below as that is where i have created it and open it in VS 2005 from there..I did read that if you use IIS 5.1 then the user should be ASPNET ... but i don't seem to have that use but a Network Services user...Any help or guidance would be really appreciated... i have come to a stop stage and can't get any further..Thanksian
Server Error in '/igdotcom' Application.
Failed to update database
"C:INETPUBWWWROOTIGDOTCOMAPP_DATAASPNETDB.MDF" because the database
is read-only. Description:
An unhandled exception occurred during the execution of the current web
request. Please review the stack trace for more information about the error and
where it originated in the code. Exception Details:
System.Data.SqlClient.SqlException: Failed to update database
"C:INETPUBWWWROOTIGDOTCOMAPP_DATAASPNETDB.MDF" because the database
is read-only.Source Error:
An unhandled exception was generated during the execution of the
current web request. Information regarding the origin and location of the
exception can be identified using the exception stack trace below.
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Mar 31, 2008
hi
i am currently testing my website on IIS7, and first error is that:
Server Error in '/' Application.
Failed to update database "C:INETPUBWWWROOTAPP_DATAASPNETDB.MDF" because the database is read-only.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Failed to update database "C:INETPUBWWWROOTAPP_DATAASPNETDB.MDF" because the database is read-only.Source Error:
Line 109:
Line 110: conn.Open();
Line 111: SqlDataReader reader = command.ExecuteReader();
Line 112: reader.Close();
Line 113: command.Connection.Close();
i cheked on aspnet_Data folder to see if is read-only AND IT IS, but if i change it, the read-only property is setting up again. why?
thanks in advance
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Jul 20, 2005
I had a databases running on SQL Server (EVALUATION VERSION).I moved it to another system running:-Windows 2000 Server-IIS 5.0-BlueDragon Server-MSDEI applied all of the latest service packs, security updates, etc...Intalled SQL Server Web Data Administrator and .NET framework.I attached the database using sp_attach_db:[color=blue]>osql –U sa>password>Sp_attach_db ‘whatever',>@filename1 = ‘C:Program FilesMicrosoft SQL[/color]ServerMSSQLDataCollaborationTools.mdf',[color=blue]>@filename2 = ‘C:Program FilesMicrosoft SQL[/color]ServerMSSQLDataCollaborationTools.ldf'[color=blue]>go[/color]I added my datasource using the ODBC Admin Tool...Verified it using the BlueDragon Admin Datasources page....But now I'm getting the error message:'Could not run BEGIN TRANSACTION in database 'whatever' because thedatabase is read-only.'Any help/guidance would be appreciated.Thanks very much.Shaun
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Dec 19, 2006
I am building a Windows Forms application in VS 2005, using C# and SQL Server 2005 Express as the backend.
When I try to accessd data from the db, it works with no problems.
When I try to insert/update/delete, I get the following error message
Failed to update database "DBNAME" because the database is read-only.
I am using a connection string with the following syntax:
"Data
Source=.SQLEXPRESS;AttachDbFilename=c:PATH_TO_DBdb.mdf;Database=MyDB;Integrated
Security=False;User Instance=False;User ID=USR;Password=PWD;"
I have made sure that the permissions on the DB are set (in Windows) so
that all users can modify. The user that is logging in to the DB has
status set to DBOWNER.
I have seen others experience the same problem - with ASP.net sites,
not Windows Forms sites (thus most of their solutions dont apply to me)
Any ideas on what is wrong and how I can get this to work?
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Oct 2, 2007
getting this error after publishing my site to local IIS, then trying my signup page.
Failed to update database "C:INETPUBWWWROOTAPP_DATAASPNETDB.MDF" because the database is read-only.
have tryed to change the attributes, still not working. have given write access to the APP_DATA folder from IIS, still not working.
and i cannot delete the APP_DATA folder from IIS, it says it is being used by another process or program. how to fix this? and or delete the folder?
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May 31, 2005
I use MS Sql DataBase file (SQL 2005 )as the conneciton in my project.When I use GridView to update my database, it fail:The error message is :Failed to update database "D:DATAASPNETHEALTH8APP_DATADBHEALTH.MDF" because the database is read-only. What is the problem with it?
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May 8, 2000
Hello,
I'm optimizing a database running under SQL 7.0. Have anyone any knowledge wether setting the database to "read only" can enhance performance? The database is used only for reading, one table is updated via DTS on a hourly basis, the rest of the tables on a daily basis.
Brgds
Jonas Hilmersson
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Aug 5, 2005
Hi
I have been learning on how to use the new features of the .NET 2.0, and Well I using VS2005 and everything is pretty straight foward. I did a Membership webform where you log in and create users and roles etc. I installed the SQL Server 2005 express as my Data provider and thats where my Tables are. I used the aspnetsql_reg comand to integrate the server to this application. Anyway my problem started when i decided to copy my project to my IIS server and well when I run the app from the Browser tells me that he Database It's set to Read-Omly and therefore it cant update it. This happens right after log in. but then I open the App. on hte VS and it runs find.
This is the error:
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Mar 8, 2007
hi
I'm having a problem while attaching the database to the server through server management studio. The database is getting attached as read only database.
But when i'm attaching it through command prompt or using a batch file it is getting attached properly
Can any one suggest the rason and a reamedy for avoiding this problem
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