I have a multiple form project for a Windows CE 5.0 device (Symbol MC3000) written in VB.NET (Visual Studio 2005) using SQL Server Compact 3.5.
If I create the database on the SD Card, the program works fine until the unit is "suspended". When the power resumes, I can still continue to work and save/access data in the database as long as I do not go to another form. If I go to another form, I get an access violation error (0xC0000005).
If the database is installed in main memory the prorgam works properly even after the power is cycled.
Unfortunately, due to the memory size restrictions on the device, there are cases where the database needs to be stored on the SD Card.
Currently the program uses a single "global" SQLCeConnection and the connection is closed prior to the device being powered off. However, each procedure/event in the program uses it's own SQLCeCommand and SQLCeDataReader objects (which are created and closed/disposed prior to the end of the procedure).
I have tried everything I can think of, including OS updates, .NET Compact Framework 2.0 updates and modifications to the program to correct this, but the results are the same.
Would creating a global SQLDataReader and SQLCeCommand object help with this issue or should the way that this is currently being handled work?
I have the following SQL statement in the DataReader.SQLCommand.
select * from myTable where DataEdited > 'some hard coded date data'
I want to read the above 'some hard coded date data' from a table sitting in different database which is not the same server where the DataReader is connected.
How to do that?
I can populate the 'some hard coded date data' to a SSIS variable but do not know how to embed that in the SQL statement.
HiI'm trying to loop through all the records in a recordset and perform a database update within the loop. The problem is that you can't have more than one datareader open at the same time. How should I be doing this? cmdPhoto = New SqlCommand("select AuthorityID,AuthorityName,PREF From qryStaffSearch where AuthorityType='User' Order by AuthorityName", conWhitt)conWhitt.Open()dtrPhoto = cmdPhoto.ExecuteReaderWhile dtrPhoto.Read()If Not File.Exists("D:WhittNetLiveWebimagesstaffphotospat_images_resize" & dtrPhoto("PRef") & ".jpg") ThencmdUpdate = New SqlCommand("Update tblAuthority Set NoPhoto = 1 Where AuthorityID =" & dtrPhoto("AuthorityID"), conWhitt)cmdUpdate.ExecuteNonQuery()End IfEnd WhileThanks
I have gathered from reading online that I need to create a 2nd connection to SQL Server if I want to insert records into the database while in a "while (reader.Read())" loop.
I am trying to make my code as generic as possible, and I don't want to have to re-input the connection string at this point in my code. Is there a way to generate a new connection based on the existing open one? Or should I just create 2 connections up front and carry them around with me like I do for the 1 connection now?
This is my code:1 If Session("ctr") = False Then 2 3 Connect() 4 5 SQL = "SELECT * FROM counter" 6 SQL = SQL & " WHERE ipaddress='" & Request.ServerVariables("REMOTE_ADDR") & "'" 7 dbRead() 8 9 If dbReader.HasRows = True Then 10 11 dbReader.Read() 12 hits = dbReader("hits") 13 hits = hits + 1 14 dbClose() 15 16 SQL = "UPDATE counter SET hits=" & hits 17 SQL = SQL & " WHERE ipaddress='" & Request.ServerVariables("REMOTE_ADDR") & "'" 18 dbExecute() 19 20 Else 21 22 SQL = "INSERT INTO counter(ipaddress,hits)" 23 SQL = SQL & " VALUES('" & Request.ServerVariables("REMOTE_ADDR") & "',1)" 24 dbExecute() 25 26 End If 27 28 Session("ctr") = True 29 30 End If 1 Public Sub Connect() 2 Conn = New SqlConnection("Initial Catalog=NURSETEST;User Id=sa;Password=sa;Data Source=KSNCRUZ") 3 If Conn.State = ConnectionState.Open Then 4 Conn.Close() 5 End If 6 Conn.Open() 7 End Sub 8 9 Public Sub Close() 10 Conn.Close() 11 Conn = Nothing 12 End Sub 13 14 Public Sub dbExecute() 15 dbCommand = New SqlCommand(SQL, Conn) 16 dbCommand.ExecuteNonQuery() 17 End Sub 18 19 Public Sub dbRead() 20 dbCommand = New SqlCommand(SQL, Conn) 21 dbReader = dbCommand.ExecuteReader 22 End Sub 23 24 Public Sub dbClose() 25 SQL = "" 26 dbReader.Close() 27 End Sub
the class code: Dataase.cs: using System; using System.Data; using System.Configuration; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Xml.Linq; using System.Data.SqlClient; using System.Data.Common; using System.Web; /// <summary> /// Summary description for DataBase /// </summary> public class DataBase { private SqlConnection con=new SqlConnection(); private void Open() { if (con==null) { con = new SqlConnection("Data Source=58.17.30.81;Initial Catalog=a1230192748;Persist Security Info=True;User ID=a1230192748;Password=***"); } if (con.State == System.Data.ConnectionState.Closed) { con.ConnectionString = "Data Source=58.17.30.81;Initial Catalog=a1230192748;Persist Security Info=True;User ID=a1230192748;Password=****"; con.Open(); } } public void Close() { if (con != null && con.State != System.Data.ConnectionState.Open) con.Close(); } public DataBase() { // // TODO: Add constructor logic here // } public string liuyan(string id,string sign) { string com=string.Empty; switch(sign) { case "xiaobiaoti": com="Select subject from liuyan where liuyanid='"+id+"'"; break; case "def_message": com="Select message from liuyan where liuyanid='"+id+"'"; break; } SqlCommand myCommand=new SqlCommand(com,con); Open(); try { SqlDataReader sdr=myCommand.ExecuteReader(); if (sdr.Read()) { return sdr[0].ToString(); } else { return ""; } sdr.Close(); //what i have written.} catch (Exception ex) { HttpContext.Current.Response.Write("<script>alert('error:" + ex.Message + "')</script>"); return ""; } finally { myCommand.Dispose(); Close(); } } }
it was instantiated once in aspx.cs code.I invoke liuyan(string id,string sign) twice.The first one is OK and the second one makes an exception.
I have created a data reader to loop thru a table and build an update statement. Now I need to execute this statement in the datareader loop but the connection object is in use.
I tried creating another connection object but get an error: "The context connection is already in use."
Is there a way to open another connection while the main context connection is open. Just to make it clear, I do not want to read all the rows into memory first and then call update, it has to happen for each iteration of the datareader.
Please see following code : SqlConnection conn=new SqlConnection(@"something....;");SqlCommand comm=new SqlCommand("Select TOP 10 * FROM TableReaderTest WITH (HOLDLOCK) ",conn); conn.Open();SqlDataReader rd;conn=null; try{ rd = comm.ExecuteReader(); rd.Close();}catch (Exception ex){ MessageBox.Show(ex.Message);} This Code works fine. I have set conn=null, still datareader is able to read the data. Why? Thank you.
I am trying to use the DataReader Source to import a table from a PostgresSQL database into a new table in SQL 2005 database. It works for all tables except one, which has over 80,000 records with long text columns. When I limit the import to fraction of records (3,000 to 4,000 records) it works fine but when I try to get all it generates the following errors:
Source: DataReader using ADO.NET and ODBC driver to access PostgresSQL table Destination: OLE DB Destination - new table in SQL 2005 (BTW - successful import with DTS packagein SQL 2000)
---Errors Error: 0x80070050 at Import File, DTS.Pipeline: The file exists.
Error: 0xC0048019 at Import File, DTS.Pipeline: The buffer manager could not get a temporary file name. The call to GetTempFileName failed.
Error: 0xC0048013 at Import File, DTS.Pipeline: The buffer manager could not create a temporary file on the path "C:Documents and SettingsmichaelshLocal SettingsTemp". The path will not be considered for temporary storage again.
Error: 0xC0047070 at Import File, DTS.Pipeline: The buffer manager cannot create a file to spool a long object on the directories named in the BLOBTempStoragePath property. Either an incorrect file name was provided, or there are no permissions.
Error: 0xC0209029 at Import File, DataReader Source - Articles [1]: The "component "DataReader Source - Articles" (1)" failed because error code 0x80004005 occurred, and the error row disposition on "output column "probsumm" (1639)" specifies failure on error. An error occurred on the specified object of the specified component.
Error: 0xC02090F5 at Import File, DataReader Source - Articles [1]: The component "DataReader Source - Articles" (1) was unable to process the data.
Error: 0xC0047038 at Import File, DTS.Pipeline: The PrimeOutput method on component "DataReader Source - Articles" (1) returned error code 0xC02090F5. The component returned a failure code when the pipeline engine called PrimeOutput(). The meaning of the failure code is defined by the component, but the error is fatal and the pipeline stopped executing. ---End
Any idea why it can't create a temp file or why it complains about the "The File exists", which file, where, etc. Any help or alternative suggestions are greatly appreciated. What I am missing or doing wrong here?
This is my page_loads event code and iam getting the Exception pasted below the code. ----------------------------------------------------------------------------------------------------------------------------------------------------- Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) If Not Page.IsPostBack Then Dim myconnection As New SqlConnection("Data Source=localhostSQLEXPRESS;initial catalog = safetydata.mdf;Integrated Security=True;User Instance=True") Dim strSQL As String = "SELECT Incident_Id,Emp_No From Report_Incident" Dim mycommand As New SqlCommand(strSQL, myconnection) myconnection.Open() Dim reader As SqlDataReader = mycommand.ExecuteReader()
Dim chart As New PieChart chart.DataSource = reader chart.DataXValueField = "Incident_id" chart.DataYValueField = "Emp_No" chart.DataBind()
End If End Sub ------------------------------------------------------------------------------------------------------------------------------- EXCEPTION IS BELOW Cannot open database "mydatabase.mdf" requested by the login. The login failed.Login failed for user 'myusername'. 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: Cannot open database "safetydata.mdf" requested by the login. The login failed.Login failed for user 'myusername'.Source Error:
Line 18: Dim strSQL As String = "SELECT Incident_Id,Emp_No From Report_Incident" Line 19: Dim mycommand As New SqlCommand(strSQL, myconnection) Line 20: myconnection.Open() Line 21: Dim reader As SqlDataReader = mycommand.ExecuteReader() Line 22: Source File: C:Incident Reporting System--Trial VersionWebChart.aspx Line: 20 Stack Trace:
Attempting to create a data flow task to copy data from AS/400 (DB2) to SQL2005, using an existing System DSN ODBC connection defined on the SQL2005 host.
Problem:
When adding the DataReader Source component to the package, I cannot assign the Connection Manager. Designer issues the error message:
"The runtime connection manager with the ID "" cannot be found. Verify that the connection manager collection has a connection manager with that ID."
Editing the DataReaderSrc component shows only one row under the Connection Managers tab:
The datareadersrc component editor displays the warning message: "Not all connection managers have been set. Set all connection managers.". Clicking the Refresh button causes the error message to be displayed "The runtime connection manager with the ID "" cannot be found. Verify that the connection manager collection has a connection manager with that ID."
I am prevented from assigning my Connection Manager object the DataReaderSrc.
The package already contains one Connect Manager object:
Provider: .Net Providers/Odbc Data Provider System DSN
I'm using a context connect inside a CLR stored procedure. The CommandTimeout property has no functionality when used with a context connection. See remarks in this url: http://msdn2.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.commandtimeout.aspx
This is a problem for me because I'm at times call a link server that has been known to wait indefinitely. I've tried using a regular conneciton that supports command timeouts within my CLR stored procedure but I get a permissions error (Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0,0, Culture=neutral failed.)
How can I prevent my CLR stored procedure from waiting indefinitely?
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
Hi there, I'm not exactly sure where to post this question, so I'll post it here.
I have 2 Windows XP machines, not part of a network domain. One of the XP machines is running SQL Server 2005 Express edition, lets call this DB machine. The other machine is just running my application - App machine. As part of my application, I want to be able to do a backup of the database.
The DB machine is also running the application. If I log into my application on the DB machine using SQL Server Authentication, and run the backup it works fine. (It's using the T-SQL BACKUP command). If it log into my application on the App machine, and try to do the backup, I'm getting an error saying that "The user is not associated with a trusted SQL connection". The same user is being used in both scenarios, and this user can update the database fine on the App machine, so it's not really a connection problem, it seems a permission problem. The SQL user I have created is a member of the db_backupoperator role for the required database.
Is anyone aware as to why I would be getting this error?
I have looked at other threads regarding errors similar to this, but I think mine is a bit different.
I am using SQL2005 Standard Edition and my application is coded with C# using ADO.Net. OLEDB connection is used. The error occurs when the application has only one thread accessing the database. It does not happen consistently, so it is very puzzling.
I am wondering if anyone could offer any tip to diagnose this.
I created a SSIS package to import an excel spreadsheet into my data warehouse. When I run the package it runs fine. When I created a SQL Job to run the package I get the following error:
Option "Source=D:HelpDeskImportBook2.xls;Extended" is not valid. The command line parameters are invalid.
Now if I look at my source connection string in the job it looks like the following:
as far as I know from docs and forum datareader is for .NET data in memory. So if a use a complex dataflow to build up some data and want to use this in other dataflow componens - could i use data datareader source in the fist dataflow and then use a datareader souce in the second dataflow do read the inmemoty data from fist transform to do fursther cals ?
how to pass in memory data from one dataflow to the next one (i do not want to rebuild the logic in each dataflow to build up data data ?
Is there a way to do this ? and is the datareader the proper component ? (because its the one and only inmemory i guess, utherwise i need to write to temp table and read from temp table in next step) (I have only found examples fro .NET VB or C# programms to read a datareader, but how to do this in SSIS directly in the next dataflow?
This is first time I am trying to ste timeout on SSIS package ,Can some one let me know which is the best way to set timeout for connection? And what is the difference between General TimeOut and Command TimeOut?
i am using visual web developer 2005 and SQL 2005 with VB as the code behindi am using INSERT command like this Dim test As New SqlDataSource() test.ConnectionString = ConfigurationManager.ConnectionStrings("DatabaseConnectionString1").ToString() test.InsertCommandType = SqlDataSourceCommandType.Text test.InsertCommand = "INSERT INTO try (roll,name, age, email) VALUES (@roll,@name, @age, @email) " test.InsertParameters.Add("roll", TextBox1.Text) test.InsertParameters.Add("name", TextBox2.Text) test.InsertParameters.Add("age", TextBox3.Text) test.InsertParameters.Add("email", TextBox4.Text) test.Insert() i am using UPDATE command like this Dim test As New SqlDataSource() test.ConnectionString = ConfigurationManager.ConnectionStrings("DatabaseConnectionString").ToString() test.UpdateCommandType = SqlDataSourceCommandType.Text test.UpdateCommand = "UPDATE try SET name = '" + myname + "' , age = '" + myage + "' , email = '" + myemail + "' WHERE roll 123 " test.Update()but i have to use the SELECT command like this which is completely different from INSERT and UPDATE commands Dim tblData As New Data.DataTable() Dim conn As New Data.SqlClient.SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|Database.mdf;Integrated Security=True;User Instance=True") Dim Command As New Data.SqlClient.SqlCommand("SELECT * FROM try WHERE age = '100' ", conn) Dim da As New Data.SqlClient.SqlDataAdapter(Command) da.Fill(tblData) conn.Close() TextBox4.Text = tblData.Rows(1).Item("name").ToString() TextBox5.Text = tblData.Rows(1).Item("age").ToString() TextBox6.Text = tblData.Rows(1).Item("email").ToString() for INSERT and UPDATE commands defining the command,commandtype and connectionstring is samebut for the SELECT command it is completely different. why ?can i define the command,commandtype and connectionstring for SELECT command similar to INSERT and UPDATE ?if its possible how to do ?please help me
i am using a OLE DB Source in my dataflow component and want to select rows from the source based on the Name I enter during execution time. I have created two variables,
enterName - String packageLevel (will store the name I enter)
myVar - String packageLevel. (to store the query)
I am assigning this query to the myVar variable, "Select * from db.Users where (UsrName = " + @[User::enterName] + " )"
Now in the OLE Db source, I have selected as Sql Command from Variable, and I am getting the variable, enterName,. I select that and when I click on OK am getting this error.
Error at Data Flow Task [OLE DB Source [1]]: An OLE DB error has occurred. Error code: 0x80040E0C. An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80040E0C Description: "Command text was not set for the command object.".
Can Someone guide me whr am going wrong?
myVar variable, i have set the ExecuteAsExpression Property to true too.
Hi. I am writing a program in C# to migrate data from a Foxpro database to an SQL Server 2005 Express database. The package is being created programmatically. I am creating a separate data flow for each Foxpro table. It seems to be doing it ok but I am getting the following error message at the package validation stage:
Description: An OLE DB Error has occured. Error code: 0x80040E0C.
An OLE DB record is available. Source: "Microsoft SQL Native Client" Hresult: 0x80040E0C Description: "Command text was not set for the command object".
.........
Description: "component "OLE DB Destination" (22)" failed validation and returned validation status "VS_ISBROKEN".
This is the first time I am writing such code and I there must be something I am not doing correct but can't seem to figure it out. Any help will be highly appreciated. My code is as below:
private bool BuildPackage()
{
// Create the package object
oPackage = new Package();
// Create connections for the Foxpro and SQL Server data
MessageBox.Show("The DTS package was not built successfully because of the following error(s):" + sErrorMessage, "Package Builder", MessageBoxButtons.OK, MessageBoxIcon.Information);
Hey guys, whats an easy way to pass a value into a stored procodure? I tried the code below but I keep on getting a "Procedure 'sp_InsertData' expects parameter '@gpiBatchNo', which was not supplied." error. My stored proc basically gets inserts the passed variable into a databaseSqlConnection sqlSecConnection = new SqlConnection(sqlPriConnString);SqlCommand sqlSecCommand = new SqlCommand(); sqlSecCommand.Connection = sqlSecConnection; sqlSecCommand.CommandText = "sp_InsertData";sqlSecCommand.CommandType = CommandType.StoredProcedure;sqlSecCommand.Parameters.Add("@gpiBatchNo", SqlDbType.NVarChar) ; sqlSecConnection.Open();int returntype = sqlSecCommand.ExecuteNonQuery(); sqlSecConnection.Close();
Hi, I am facing a problem to access datareader... actually i want to get data on lables from datareader. actually i am having one table having only one column and i hav accessed all data into datareader but the problem is that i just want to get data row by row...
For example there are four labels Label1, Label2, Label3, Label4 and want to print the data from datareader on to thease labels....
Hi, What is the difference b/w sqldatareader and sqldataadapter? For what purpose are they used in a database connection & how do they differ from each other? Pls explain me in detail.Regards Vijay.
i need help to know what is the best practice i have a stored proc which returns 4 different resultselts will that be easy to use dataset or datareader? my purpose of using dataset/datareader is to load the data in a class thanks.
