3-Tier Architecture - Need To Change Connection String For DAL/BLL Dynamically On Login
Oct 31, 2006
Hi Folks ...
Question for everyone that I have not been able to figure out. I have an application that is spread across tiers:SQL Connection defined in Web.Config file that connects to SQLServer database.
DAL layer created references SQL Connection in Web.Config file - have noticed this copies the connection string information to the local properties for each TableAdapter that is defined in the DAL layer.BLL Layer that references Table Adapters declared in the DAL layer.
When the web site is called, the link will provide an encoded id.Sample call to website: http://www.mysamplesite.com/default.aspx?company=AE2837FG28F7B327
Based on the encoded id that is passed to the site, I need to switch the connection string to use different databases on the backend.Sample connection string:
Data Source=localhost;Initial Catalog=dbSystem_LiveCorp1;User ID=client;Password=live2006
I would need to change Initial Catablog to the following:Data Source=localhost;Initial Catalog=dbSystem_LiveCorp196;User ID=client;Password=live2006
How do I do this and have the connection string reflected in all of the Table Adapters that I have created in the DAL layer - currently 100+ Table Adapters have been defined.
As we gain new clients, I need to be able to have each clients information located in a different database within SQL Server. Mandated - I have no choice in this requirement. Being as I don't want to have to recreate the DAL for several dozen clients and maintain that whenever I make a change to the DAL to then replicate across multiple copies. There has to be a way to dynamically alter the SQLConnection and have it recognized across all DAL TableAdapters.
I'm developing with MS-Visual Studio 2005 - VB.
Any help would be greatly appreciated. Thanks ...
David
Any day above ground is a good day ...
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Nov 15, 2007
Hi,
I am looking to dynamically change the connection string in my SSIS package, to avoid changing the connection string each time I want to run in different environments.
Thanks in advance
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Mar 4, 2006
How can
ConfigurationManager.ConnectionStrings.Item("ConnectionString").ConnectionString
be embedded in the declaration of sqldatasource?
Thanks.
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Sep 21, 2007
I have created an application that I intended to be 3-tier, but I am not sure if I did it properly. I constructed it like this: I created a DLL that contains methods that validate the passed parameters, checks the data against business rules, and issues ADO.NET methods to access the data. The ASP.NET presentation layer uses Object Data Sources to link to these methods. With this architecture I consider the ASP.NET pages to be the presentation layer, the DLL to be the business layer, and the database itself to be the data layer.
Now I am wondering if the standard practice is to have a further division? In this case, there would be a business layer DLL whose only purpose is to validate the parameters passed to it by the presentation layer, and to do business rules checking. There would also be a data layer DLL whose purpose is to accept parameters from the business layer and issue ADO.NET methods to access the database. In this scenario the database itself would be considered part of the data layer, or not considered to be a layer at all.
Either one will work, but I would like to implement the architecture that is most accepted, and allows the easiest maintenance. What is the best practice for designing a 3-tier architecture?
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Nov 28, 2006
I using Visual Web Designer Express (with Visual Basic), with a SQL Server 2000 database. I have a prototype application running satisfactorily using code that builds queries, but I'm now trying to rebuild the application "properly" using three-tier architecture. I have been following the principles of Scott Mitchell's tutorials. I have created an database .xsd with a table adaptor, and replaced the rather grotty query-building code in the business layer with better code referencing the table adaptor. Thus where the first version had code: -
Dim queryString As String = "SELECT * FROM NZGDB_User WHERE USRid = '" & Userid & "'" Dim message As String = "" Dim Found As Boolean = False Try Using connection As New SqlConnection(GDB_AppSettings.Connection) Dim command As New SqlCommand(queryString, connection) connection.Open()
Dim reader As SqlDataReader = command.ExecuteReader()
If reader.Read() Then Found = True _USRid = reader("USRid") _USRPassword = reader("USRPassword") _USREmail = reader("USREmail") _USRTitle = reader("USRTitle") _USRName = reader("USRName") _USRRole = reader("USRRole") If IsDBNull(reader("USRAgreedConditions")) = False Then _USRAgreedConditions = reader("USRAgreedConditions") End If End If reader.Close() End Using Catch ex As Exception If Left(Err.Description, 68) = "An error has occurred while establishing a connection to the server." Then Return "Cannot open database to logon" Else Return Err.Description End If End Try
the new version is much more elegant: -
Dim taUser As New NZGDBTableAdapters.NZGDB_UserTableAdapter()
Dim tbUser As NZGDB.NZGDB_UserDataTable = taUser.GetUserByUserid(userid) If tbUser.Count <> 1 Then ' Anything other than 0 or 1 should be impossible Return "User not found" End If
Dim trUser As NZGDB.NZGDB_UserRow = tbUser(0) _USRid = userid _USRPassword = password _USREmail = trUser.USREmail _USRTitle = trUser.USRTitle _USRName = trUser.USRName _USRRole = trUser.USRRole _USRAgreedConditions = trUser.USRAgreedConditions
However, there is a problem. The database field USRAgreedConditions is a Datetime field that can be null. The new version works perfectly when it is NOT null, but throws an exception: -
System.Data.StrongTypingException was unhandled by user code Message="The value for column 'USRAgreedConditions' in table 'NZGDB_User' is DBNull." Source="App_Code.wt2vzoc1" ....
There is no point in writing: - If Not IsDBNull(trUser.USRAgreedConditions) Then _USRAgreedConditions = trUser.USRAgreedConditions End Ifbecause the exception occurs within the automatically-created code in the data access layer. I tried changing the Nullvalue property of the field USRAgreedConditions in the table adaptor, but the only valid option is (Throw Exception) unless the field is a String. Of course USRAgreedConditions is a Datetime field, so I can't change the property.
It seems that my only options are: -1. To stick with the old query-building code. But this doesn't give me the advantages of a proper 3-tier architecture2. To change the generated code in wt2vzoc. This MUST be a bad idea - surely I should leave this code untouched. Besides, what if the table adaptor has to be regenerated when I change the table design?3. Code a Try block within the business layer: - Try _USRAgreedConditions = trUser.USRAgreedConditions Catch ex As Exception _USRAgreedConditions = Nothing End Try
This seems to work OK, but seems less elegant than the original code in the old version: - If IsDBNull(reader("USRAgreedConditions")) = False Then _USRAgreedConditions = reader("USRAgreedConditions") End IfIs there a better way?
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Mar 25, 2008
Hi ,
We are trying to implement a 2 tier architecture for our inbuild SQL 2005 backed online application. We want the SQL Reporting Server Interface --- Reporting service website to sit on Server 'A' and the actual reporting server to sit on Server 'B'.
Can someone suggest or advise us how to proceed with this.
Server 'A' is our application server and has IIS & Application.
Server 'B' is our DB server and has IIS,SQL 2005, Reporting Server,Intergration Service.
All suggestions are welcome.
Thanks,
Namit Sethi
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Nov 6, 2007
We have a 2-tier architecture with thick client (.NET 2.0) applications directly accessing the SQL Server database. We are struggling to manage lots of users while maintaining security. Granting lots of users directly to the database seems to be tough to manage. In fact, we would like to let supervisors without DBA previlege to add and remove users of our applications. Using SQL Authentication (a single account to access the database) is the other alternative but it is not considered as a secure solution.
I would appreciate if anyone gives me suggestions on how to handle this, without moving to a 3-tier architecture (dedicated middle-tier DB access layer running a custom user account).
Thanks in advance.
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Oct 26, 2007
Hi. I have this kind of problem since I am not very conversant with SSIS
and stripting in VB.NET.
The set-up is the following:
Flat File Source -> Script Component -> Flat File Destination
The flat file source looks like this:
NameOfFile
Headers
Data
Data
Data and many more rows of Data
NameOfAnotherFile
Headers
Data
Data
Data and many more rows
NameOfAnotherFile
Headers
Data
Data and so on in the same manner...
My stript looks like that (not very complicated):
Public Overrides Sub Input0_ProcessInputRow(ByVal Row As Input0Buffer)
Dim strRow As String = Row.Column0.Trim()
Dim strFolder As String = "Data"
Dim strConn As String
Dim charSep() As Char = {CChar(" ")}
If Mid(strRow.ToLower(), 1, 2) = "d0" Then
' This is the file name, so start a new connection to a new file
' which definitely does not exist yet
strConn = strFolder + strRow + ".csv"
' DestinationFile is the name of the
' Flat File Connection Manager
With Me.Connections.DestinationFile
.ConnectionString = strConn
End With
Else
Row.Column0 = String.Join(",", strRow.Split(charSep, StringSplitOptions.RemoveEmptyEntries))
End If
End Sub
I have several questions regarding this one.
1. Is it ok to change the ConnectionString property of the manager
to redirect the row to a different file? If not, what more to do?
2. If the new destination file does not yet exist, will it be created for me or will
I get an error? If I do, what to do not to?
3. The most important: What steps to take so that a row is discarded
from the pipeline in the script? I want some rows not to be directed
to the file destination. These are the lines that contain the name
of the file into which the data below belongs.
If you can optimize some steps in the script, then please do so by all means.
Thank you for any comments and the knowledge you kindly agree to share with me.
Darek
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Oct 14, 2007
Hi,
I have a script component. What it does, it queries the a table using a connectionstring assigned to it in the Connection Managers Editor (which is an ado.net adapter). this works fine when i'm using a windows login in the ado.net connection manager. But when i changed my connection to use SQL server login, I encounter this error:
OnError,,,Add new records to Dim_T_Status (Case),,,10/14/2007 5:54:47 PM,10/14/2007 5:54:47 PM,-1073450910,0x,System.Data.SqlClient.SqlException: Login failed for user 'CS_REPORT'.
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.HandleUserException(Exception e)
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.ProcessInput(Int32 inputID, PipelineBuffer buffer)
at Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostProcessInput(IDTSManagedComponentWrapper90 wrapper, Int32 inputID, IDTSBuffer90 pDTSBuffer, IntPtr bufferWirePacket)
OnError,,,LOAD AND UPDATE OCEAN Dimension Tables,,,10/14/2007 5:54:47 PM,10/14/2007 5:54:47 PM,-1073450910,0x,System.Data.SqlClient.SqlException: Login failed for user 'CS_REPORT'.
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.HandleUserException(Exception e)
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.ProcessInput(Int32 inputID, PipelineBuffer buffer)
at Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostProcessInput(IDTSManagedComponentWrapper90 wrapper, Int32 inputID, IDTSBuffer90 pDTSBuffer, IntPtr bufferWirePacket)
OnError,,,LoadOCEANDimensions,,,10/14/2007 5:54:47 PM,10/14/2007 5:54:47 PM,-1073450910,0x,System.Data.SqlClient.SqlException: Login failed for user 'CS_REPORT'.
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.HandleUserException(Exception e)
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.ProcessInput(Int32 inputID, PipelineBuffer buffer)
at Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostProcessInput(IDTSManagedComponentWrapper90 wrapper, Int32 inputID, IDTSBuffer90 pDTSBuffer, IntPtr bufferWirePacket)
How to go about this?
cherriesh
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Feb 28, 2008
I have 3 web identical web apps whose only diff is that they access different SQl Server DB's. I use the SQLDataSource in a number of pages to retrieve data from the db. The apps all use Forms Auth. I would like to be able to see who is the logged on user user and assign the approp connection string to all the SQLDataSources in the app. For example when user UserA logs in they are retrieving data from on db but when UserB logs in they are retrieving data from another db.
I am sure this can be done but could use a little guidance. Thanks in advance.
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Apr 18, 2008
I need to make my site aware of which server_name it is loading from so it uses a different connection string. (have dev + prod servers for web/sql)Currently my connection string is in web.config as follows: <connectionStrings> <!-- Development and Staging connection string --> <add name="myconnection" connectionString="server=myserver; user id=mysuer; password=mypassword; database=mydatabase" /> </connectionStrings> I need to make sure the 'name' is the same for both connection strings since that is how the rest of my site looks for it. However, I'm not sure how to get both in here with some sort of 'if/then' statement to determine which one to use.I've heard it could be done in global.asax with something similar to the code below, but I dont know how to assign a 'name' to a connection string for that type of setup. Sub
Session_OnStart ServerName =
UCase(Request.ServerVariables("SERVER_NAME")) IF ServerName = "prod.server.com" THEN ...Set Prd string... ELSE ...Set Dev string... END IF End
Sub
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Mar 12, 2008
Hi,
I tried to follow the widely talked about method to dynamically populate the connection string property of my flatfileconnection manager from a variable. I keep getting the following non-fatal error.
TITLE: Microsoft Visual Studio
------------------------------
Nonfatal errors occurred while saving the package:
Error at Package [Connection manager "FFCM"]: The file name ""C:ProjectsSSISHLoadTOutputOut.csv"" specified in the connection was not valid.
Error at Package: The result of the expression "@[User::CsvFullFileName]" on property "ConnectionString" cannot be written to the property. The expression was evaluated, but cannot be set on the property.
Here is what I am trying to do.
I have a foreach loop that iterates through a list of xml config files and reads the config information including the destination csv file name and does a data transformation.
So I created a flatfile connection to a csv file did my data mappings.
Created a package level variable to hold the destination file path
In the Flat file conn. manager's properties -> expression -> set the @[User::CsvFullFileName] (which even evaluates fine)
When I try to run the package I keep getting the above mentioned non-fatal error..I checked the path and it is valid. I even tried
the c:\projects\...notation and the UNC path notation...all seem to give the same error
Anyone experience this before ? any thoughts would be appreciated.
Thanks
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Jul 12, 2012
I have create packages which loads the data from flat file to sql server table, now I want to make my destination table connection dynamic what is format of connection string. I also need to pass user name and password for sql server dynamically in this case, what is the format for the connection string.
Also in package i used ADO.net as source for *.mdb files how i can set the commection to .mdb files dynamically which is used as source in my package.
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Dec 13, 2006
I have a SSIS Package which I developed on my own my database server.
But now the package is to deployed on 3-4 different computers pointing it to different databases.
I do not want to change the connection string for each and every instance because in future there may be more number of instances running.I tried using the Configuration file and add that file in to the configuration window but that also did not work.Please can anybody help me?
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Jun 21, 2007
After posting and solving the last problem - I thought I'd post this one as it has got me a bit confused?
I am trying to connect to a local SQL Express database via an ASP website using the below connection string
Provider=SQLNCLI;Server=.S15XXXX;Database=thenameofdb;Trusted_Connection=yes;
But I am getting the following error...
Microsoft SQL Native ClientCannot open database "thenameofdb" requested by the login. The login failed.
I thought as I am using a trusted connection I didn't need to login?? Have I got the connection string wrong?? any help very much appreciated... Thanks
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Mar 9, 2007
I've recently uploaded my website, http://www.bigredsongbus.com, to my host. Unfortunately, they don't support the use of SQL Server Express. So, I've purchased an addon through my host - discountasp.net. I've attached my database file to their server, now all that I need to do is to change the connection string in my .config file so that it points to the SQL Server. I don't know how to do this. Any help, please?Jeffrey Way
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Dec 21, 2007
I know that connecttimeout and commandtimeout are separate entities. Is it possible to change the default command timeout value by changing the connection string?
I need to increase the command timeout and want to know if I can do it without changing my code and rebuilding my ASP.NET 1.1 web app.
Thanks in advance. -- ZLA
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Jun 6, 2008
I recently moved my web app off of my development machine which hosted the db. Now the db is hosted on a SQL 2005 server and when i try to use the web app there is something wrong with the connection string i get a login failure. there was an account created on the domain called bookservice the domain name is thc. this user was given dbowner privlidges to the BookSchedule db on the CORESQLDEV01 server. Here is my original connection string from my web.config <connectionStrings><add name="BookScheduleConnectionString" connectionString="Data Source=SQLSERVERSQLEXPRESS;Initial Catalog=BookSchedule;Integrated Security=True"
providerName="System.Data.SqlClient" />
</connectionStrings>Here is the new connection string after i moved the db to the SQL server <connectionStrings>
<add name="BookScheduleConnectionString" connectionString="Data Source=CORESQLDEV01;Initial Catalog=BookSchedule;User Id=THCookservice;Password=*********"
providerName="System.Data.SqlClient" />
</connectionStrings> Here is some of the error output from the webapp when it tries to load the pageSqlException (0x80131904): Login failed for user 'THCookservice'.] System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +800131 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +186 System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +1932 System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) +33 System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) +172 System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +381 System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +181 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +173 System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) +357 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +30 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject) +424 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject) +66 System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +494 System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +82 System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +105 System.Data.SqlClient.SqlConnection.Open() +111 System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +121 System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +137 System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, String srcTable) +83 System.Web.UI.WebControls.SqlDataSourceView.ExecuteSelect(DataSourceSelectArguments arguments) +1770 System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +17 System.Web.UI.WebControls.DataBoundControl.PerformSelect() +149 System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +70 System.Web.UI.WebControls.GridView.DataBind() +4 System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +82 System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() +69 System.Web.UI.Control.EnsureChildControls() +87 Any help is greatly appreciated. If more information is needed please let me know
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Mar 12, 2007
Hi there
I'm trying to connect to sqlserver express using dreamweaver mx. TYhey are both installed on the same machine (win 2000 server),
What I am confused about is the user and password, I have installed the example Northwind database and attempting to connect to it.
In dreamweaver I add a connection (SQL Server connection) , a template shows and I add the data:
Persist Security = false;
Data Source =mycomputersqlexpress;
Initial Catalog = Northwind;
User ID = ?
Password = ?
What do I put in the User ID, Password and how do I configure sqlserver (I'm using Server Management Studio).. As I said I already have Northwind under the database section? but don't know how to set permissions.. Thanks
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Jun 19, 2007
Hello,
I have searched every post and tried every connection string there but can't figure out how to connect to my database on my remote server. I am using Visual Developer 2005 Express Edition in C# and uploading it to a Windows server running asp.net 2.0. The domain has not resolved yet.
I am so new to this and have followed many tutorials step by step but none of them address this issue. They just show how to upload it to the server.
Do I need to use the SQL server provided by my host or can the database stay in the App_Data folder?
My local connection string works locally:
<add name="ConnectionString" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|add_newSQL.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
When I uploaded to my server I changed SQLEXPRESS to (local) as advised in the forum.
<add name="ConnectionString" connectionString="Data Source=(local);AttachDbFilename=|DataDirectory|add_newSQL.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
When I debug a page I get the <customErrors mode="Off"/>
error message even thought I have already set it in my remote web.config file which may be causing problems itself:
<configuration>
<appSettings/>
<connectionStrings>
<add name="ConnectionString" connectionString="Data Source=(local);AttachDbFilename=|DataDirectory|add_newSQL.mdf;Integrated Security=True;User Instance=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
<system.web>
<customErrors mode="Off" />
<compilation debug="false" />
<authentication mode="Windows" />
</system.web>
</configuration>
Thanks for any help you can offer. I wish I could find someone to hire to do this part for me or teach me how over the phone. Any suggestions?
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Apr 5, 2006
Do I need to change connection string if I upgrage SQL server from 2000 to 2005 in ASP.NET 2.0?
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May 28, 2014
One of my excel 2013 power pivot report was migrated from old server to new server after migration i changed the excel power pivot connection string to connect with new server but the workbook connections is still taking the old connection string of old server and there is no option of changing workbook connection string .
I am able to edit the powerpivot connection but workbook connections are not getting updated they are still taking old server connection string.
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May 22, 2008
Hi
I think the subject is pretty clear.
We are thuinking of installing Server 2008 in x64 mode on a new Application-Tier-Machine. But due to existing projects which use several databases the SQL-machine runs on a Server 2003 x32.
Would it be possible to install the Reporting Services x64 binaries on the app-tier but use a x32 SQL-Instance for the data?
Thanks in advance
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Jul 20, 2005
Greetings,We are trying to set up a set of "Leading Practices" for ourdevelopers, as well as ourselves, and hope some gentle reader canrecommend some documentation in favor of what appears to be the rightposition to take.We do not allow third party applications to run on our SQL Servers. Wewant to include DTS Packages under the definition of third partyapplications, insisting instead that the developers save theirpackages as COM Formatted files into their source code control systemsand run them from their app servers. The devlopers would like to hearthis from someone besides ourselves.While strong recomendations to remove guest access to MSDB altogetherabound, I have been unable to find a straight forward discussion ofthe advantages of structured file storage and app server off load ofDTS packages.Can anyone suggest any articles, white papers, rants, etc attemptingto formulate a solution to the benefits of taking msdb away fromguest, with the advantages of running DTS from an App server orworkstation platform, with the packages protected in source codecontrol?Thank youJohn Pollinsjpollins @ eqt . com
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Oct 1, 2007
I am trying to filter some results using the FilterExpression Property of the SqlDataSource. I have multiple drop down lists with different filtering options. I am trying to change the filter that is applied to a gridview.
Something like this example... http://blogs.vbcity.com/mcintyre/archive/2006/08/17.aspx
Here is some of my code..Private Sub ApplyFilter()
Dim _filterExpression As String = ""
If (Not DropDownList1.SelectedIndex = 0) And (DropDownList2.SelectedIndex = 0) And (DropDownList3.SelectedIndex = 0) Then
_filterExpression = "CategoryName = '{0}'"
End If Me.SqlDataSource1.FilterExpression = _filterExpression
End Sub
Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles DropDownList1.SelectedIndexChanged
ApplyFilter()
End Sub
But this doesn't seem to work. The FilterExpression doesn't keep the value. I am looking for a way to dynamically change the FilterExpression. Any Ideas or Suggestions?? Thanks.
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Feb 7, 2006
Folks,
We have some reports that have optional columns. We have them working very nicely, with the column showing or hiding based on values in the report -- works great.
Except -- when the columns are present, the report spans onto two pages, when exported to PDF, in width. That's understandable, as there's a lot of extra data, and exactly what we want. However, when the columns are not present, we get empty pages instead, because the report doesn't automatically contract back onto the size that fits on one page.
Changing the report to a Matrix won't work, as the hidden columns on some of these come as sets of three, where each column in the three has different formatting (different widths, format codes, etc).
Thanks!
--randy
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May 10, 2006
Hi all,
I've created 1 solution and added all my packages in different projects (like DIMENSIONS, SOURCES_SAP, ...).
For each project I have a Data Source that connects to the server. The problem is that when I want to deploy a package to the server that I always need to change the Data Source before deployment.
Before SQL Server 2005 we used a connection file (which was located as well on the server as on the development pc's in the same locations) within our DTS packages. This way we didn't had to change the connections when deploying to the server.
My intention was to use the current configuration from the configuration manager(development / production) to select the servername. Unfortunately, I didn't succeed to retrieve it's value from a variable script.
I need to have a solution that dynamically changes the datasources for multiple packages depending on a specific action.
How can I achieve this the easiest way ?
Thanks in advance !
Geert
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Sep 23, 2006
Is there a way I can build a case statment or similar to handle different where conditions?
I know I can do it dynamic sql but it would be nice to have a method where I can create the querries directly in a normal statement
Someting like:
Select c1, c2, c3
From Table
WHERE Case @Condition
WHEN '>' @SelColumn > @Limit
WHEN '=' @SelColumn = @Limit
WHEN '<' @SelColumn < @Limit
END
I know this doesn't work so an example that do work would be nice.
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Nov 30, 2007
Hi All,
I have a series of tables need to import to server. When creating the target tables, I want to change the columns name as well, for example:
Source table column Target table column
Name FN_Name
Age FN_Age
The problem is I suppose I don't know the columns name in source table, I want to the tasks scan the source table and make the change programmlly.
Which tasks or approaches can be used to implement this?
Thanks
Micror
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Feb 29, 2008
Hi All
I am getting below error while
Error string: Cannot open database requested in login 'XXXXXXXXXXX'. Login fails.
what is possible casue for above problem.
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Oct 26, 2006
I'm sure I'm missing something. I am returning the TOP X number of customers by revenue and I'd like to change the number of records returned by passing a parameter but I keep getting an error. @TopX int ( or varchar) SELECT @TopX CompanyName, Amount FROM Sales Where..... Why will this not work?
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Nov 8, 2007
Hello
I have a gridview that I use on a products page, my problems is certain products have different attributes that I would like to display.
Therefore what I would like to do is change the SelectCommand property to my SQLDatasource depending on the querystring that is passed.
For instance in my page load event I would have a CASE statement with numerous SQLString Variables.
Here is the current coding for my datasource
<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT PS.ProductSizeMM AS [Coupling Size], PS.ProductWallThickness AS [To Suit], PS.Cost AS [Price], PS.Sold_By AS [Sold by] FROM tblProduct AS P INNER JOIN tblProductSize AS PS ON P.ProductCode = PS.ProductCode WHERE (P.ProductDescription = @ProductDescription) ORDER BY PS.Sorter">
<SelectParameters>
<asp:QueryStringParameter Name="ProductDescription" QueryStringField="ProductDescription" />
</SelectParameters>
</asp:SqlDataSource>I have tried declaring a string variable in my page load event (SQLString) then setting the
SelectCommand="SQLString" but this causes a syntax error
Exception Details: System.Data.SqlClient.SqlException: Incorrect syntax near 'SQLString'.
Any help would be greatly appreicated!!
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Feb 26, 2014
I have to change the name of the history table dynamically to what is passed in the start date.
If @start_date= '1/1/2014' then it should be history_jan14
If @start_date ='02/01/2014' then it should be history_feb14 and so on.
Is there a way you can do it ?I am using SQL Server 2008.
Code :
DECLARE @start_date datetime
DECLARE @end_date datetime
SET @start_date = '01/01/2014'
SET @end_date = '02/01/2014'
[code]...
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