Manipulate Data in a data set

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  - 1
    - "Thread was being stopped" while trying to connect to AS400 iSeries using .NET My codes blowing up with the "Thread was being stopped" exception when I try to create a data connection. Here's the line of (MS VC++ .NET 2003) code blowing out: SourceConn = new IBM::Data::DB2::iSeries::iDB2Connection(S"DataSource=ANTIGUA1;DefaultCollect ion=EMBTEST;UserID=PCS;Password=PCS;"); The Exception Source is IBM.Data.DB2.iSeries. Forum discussion shows this error turning up when a thread other than the main application thread attempts to update a UI control while running in the IDE. I'm not running in the IDE, but on a test workstation, using a Release compile. My application runs as a service, so there are no UI controls involved. Can anyone shed any light on this? thanks. Daniel Wilson Senior Software Solutions Developer Embtrak Team, DV Brown Company 864-292-5888 Tag: Manipulate Data in a data set Tag: 132228
  - 2
    - Strong Typed Dataset best practices I'm new to ADO.NET 2.0 so I have some questions you may be able to help me with. 1. I decided to take advantage of Strong Typed datasets. Everything worked but I did not really like the way I had to deal with the TableAdapters. So, I went ahead and did NOT use the TableAdapters provided by the wizards in VS2005. So, my code now looks something like this: SERVER CODE (class library): //My typed dataset is named CompanyDS CompanyDS dataset = new CompanyDS(); string connectionString = ConfigurationManager.ConnectionStrings["dataBaseConnection"].ConnectionString; using (SqlConnection conn = new SqlConnection(connectionString)) { // Create the command and set its properties. SqlCommand command = new SqlCommand(); command.Connection = conn; command.CommandText = "sp_SelectCompany"; command.CommandType = CommandType.StoredProcedure; // Add the input parameter and set its properties. SqlParameter parameter = new SqlParameter(); parameter.ParameterName = "@CompanyID"; parameter.SqlDbType = SqlDbType.Int; parameter.Direction = ParameterDirection.Input; parameter.Value = ID; command.Parameters.Add(parameter); //Create the data adapter and populate the dataset SqlDataAdapter adapter = new SqlDataAdapter(); conn.Open(); adapter.SelectCommand = command; adapter.Fill(dataset,"Company"); conn.Close(); } CLIENT CODE: //My typed dataset is inside a class names "CompanyDAL" CompanyDAL company = new CompanyDAL(); CompanyDS ds = company.loadCompany(1); CompanyDS.CompanyDataTable dt = (CompanyDS.CompanyDataTable) ds.Tables[0]; MY QUESTION: a. Is this an acceptable (best practice) way of doing this or am I way off on this one? b. Why do I have to cast my datatable as "CompanyDS.CompanyDataTable"? I thought the type dataset would have typed tables of type CompanyDataTable being returned to me. 2. Has anyone used (or use) the Data Access Application Block from Microsoft Patterns and Practices? If so, is it really productive or is it a little too much for simpler jobs? I know those are subjective questions, I'm just trying to gather some input on how the community is using those things before I dive deep into one way or another of doing things in 2.0 Thanks, Fernando Tag: Manipulate Data in a data set Tag: 132224
  - 3
    - Conn Pooling Monitor This is a multi-part message in MIME format. ------=_NextPart_000_0010_01C6C83D.A7D237D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi, I would like to build a monitor application that monitors the connection = pooling. I know that it is possible to use PerfMon for SQL Server, but I = would like to build my own to deal with other providers. Does anyone have any link to articles or any other information that I = could look at? Thanks. Mike ------=_NextPart_000_0010_01C6C83D.A7D237D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2963" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Hi,</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I would like to build a monitor = application that=20 monitors the connection pooling. I know that it is possible to use = PerfMon for=20 SQL Server, but I would like to build my own to deal with other=20 providers.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Does anyone have any link to articles = or any other=20 information that I could look at?</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Thanks.</FONT></DIV> <DIV><FONT face=3DArial size=3D2>Mike</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV> </DIV></BODY></HTML> ------=_NextPart_000_0010_01C6C83D.A7D237D0-- Tag: Manipulate Data in a data set Tag: 132222
  - 4
    - ExecuteScalar don't return the corrent Int value. I'm using VB ADO.NET with Northwind database Employees table. I create a WinForm with a ComboBox (cboEmployee) to let user to select or enter full name and store it in strNames string array. I then try to get the matching Employee ID based on the employee name entered. However the ***SqlCommand.ExecuteScalar*** don't return the corrent EmployeeID... (refer coding) What is the possible mistake? Thanks for your assistance. ------------------------------------------------------------ Dim intEmployeeID As Integer = 0 Dim strNames(1) As String Dim strInput As String = cboEmployee.Text.Trim 'If user select an item from list or type valid Employee If cboEmployee.SelectedIndex <> -1 OrElse cboEmployee.FindStringExact (strInput) <> -1 Then 'The names in cboEmployee is in following format "FirstName, LastName" strNames = strInput.Split(", ") Dim cmdGetEmpID As New SqlCommand("SELECT EmployeeID FROM Employees WHERE FirstName=@firstName And LastName=@lastName", conn) cmdGetEmpID.Parameters.Add("@firstName", SqlDbType.NVarChar, 20) cmdGetEmpID.Parameters("@firstName").Value = strNames(0) cmdGetEmpID.Parameters.Add("@lastName", SqlDbType.NVarChar, 40) cmdGetEmpID.Parameters("@lastName").Value = strNames(1) '*** Problem with following statement *** intEmployeeID = CInt(cmdGetEmpID.ExecuteScalar()) '*** I always get 0 return from the following statement *** MsgBox("intEmpID:" & CStr(intEmployeeID)) End If -- Message posted via http://www.dotnetmonster.com Tag: Manipulate Data in a data set Tag: 132216
  - 5
    - Business Layer and Transactions in the Data Layer I have a BO that must call 2 functions each function residing in 2 different DO. BO->DO1.Update1 BO->DO2.Update2 Let's say that each DO call point to the same SQL Server. Let's say that each BO is on my Appserver and the 2 DOs on the SQL Server. I want to make a transaction so I am assuming that the BO is handling it. How do I create the transaction and the connections on the BO and DO's What about .NET Remoting in all this. If I create a SQLConnection in the BO and pass the SQLTransaction to the DO and try to enlist the connection(opened in the DO), the EnlistConnection takes only a transaction object but SqlTransaction cannot be converted to a Transactions.Transaction type .... BO.startTransaction DO1.Update1(tx as sqlTransaction) 'creates its own connection? receives it from BO? DO2.Update2(tx as sqlTransaction) BO.Commit or Rollback Unfortunately, there is not much information regarding the way to handle transactions between tiers, all the examples I find are transactions happenning in the same object. Thanks for your help. Tag: Manipulate Data in a data set Tag: 132215
  - 6
    - Fastest way of accessing CSV files hi, I am handling CSV files as database. each CSV got 40,000 - 60,000 lines. I have to do the joining, subquery and other complex tasks here. the problem is, my query execution time too high, 2-3 mins. how can I reduce the time ? I saw there is no way of declaring keys for CSV files in Schema.ini. I am using OleDb. anotherthing, can anyone tell me what should I use to this heavy task ? is there any good replacement of OleDb ? please let me know. Tag: Manipulate Data in a data set Tag: 132214
  - 7
    - Converting date formats Hi! I'm reading CSV-file using OleDB provider with SQL-select command and it's working fine. Anyway CSV-file contains "field" containing date values like 20060825, and I'd like to convert it into datetime format when reading it into DataTable like #8/25/2006#. How to do this? Propably I have to change select-query somehow converting this field into datetime format. Now I doing it in my code like... Dim dte As DateTime = Date.ParseExact(dr("MyDate").ToString(), "yyyyMMdd", Nothing) ...but I'd like to get rid of this way doing it already using sql-query when importing data into DataTable. -- Thanks in advance! Mika Tag: Manipulate Data in a data set Tag: 132212
  - 8
    - Change SelectCommand Runtime with Typed DataSet I have a DataTable setup and want to be able to change the columns at runtime so I limit the number of rows returned. I know you can have have multiple queries within a DataTable but they return empty columns which I don't want (or is there a way to stop empty rows being returned?). I guess this is due to the fact the queries under the main query inherit the data structure from the DataTable, is that correct? Is there any way this can be done? TIA Tag: Manipulate Data in a data set Tag: 132210
  - 9
    - Saving a dataset to a different database Hi there, I am fairly new to webservices and C#and currently have a problem with updating data to a remote sql database from data entered into a local MS access database. The dataset I am using comprises of several tables. Once the webservice has the dataset some operations are performed so that the data can be included in the SQL database i.e. if a company already exists on the SQL database then the company id on the dataset is updated, and so on. As a result I cannot (I think) use the dataAdapter to post any modified records or new additions to the SQL database. As an added complication we cannot gaurantee which fields will be in each of the tables (although the access and sql databases have the same structure), this depends on the particular client. Which means that hardcoding the insert and update into the webservice is not an option. So far I have had no problems in building and transferring the dataset, same goes for updating the details held in the dataset ready for updating/inserting to the SQL database. I have tried to manually set the state of a row so that I could use the dataAdapter, i.e. DR.RowState = DataRowState.Modified; But this appears to be a read only attribute of DataRow that cannot be altered manually. Any ideas? TIA Darren Tag: Manipulate Data in a data set Tag: 132206
  - 10
    - System.Data.OracleClient requires Oracle client software version 8.1.7 or greater (URGENT) When I try to connect Oracle 10g db from windows 2003 server I get error "System.Data.OracleClient requires Oracle client software version 8.1.7 or greater" On the Windows 2003 Server - .NET Framework 1.1 - Oracle 10g Client (I can connect with SqlPlus) I give privilege to Users,ASPNET group and others, it doesn't work. At least I gave privilege ASP.NET as Administrator but it still doesn't work! I wrote a test windows application that connect to Oracle db with oracleclient but IT DOESN'T WORK ON THE WINDOWS 2003 SERVER. So I think It is not a security problem. On the windows 2003 server System.Data.OracleClient.dll v1.1.4322.2032 On my local XP System.Data.OracleClient.dll v1.1.4322.2300 My two week is gone to solve this problem. I am sure it is not a security problem. Tag: Manipulate Data in a data set Tag: 132205
  - 11
    - downloading from web mail Hi, I have one problem . we have implemented overriding of IDownloadManager of Internet explorer. it was working fine. If we give any files which have direct hyperlink i.e from geocities or like ... . But what's the problem i am facing is it was not downloading attatchement files from yahoo mail. any one help. The code of Same way or differently implemented downloading of attatchments from yahoo or any suggestions will be given is very help ful. Thanks in advance. Tag: Manipulate Data in a data set Tag: 132204
  - 12
    - Why ImportRow is causing NullReferenceException & Rows(0) <> NULL Hello, I am receiving a System.NullReferenceException error when the ImportRow is executed. However, as you can see there are rows in the table and I can see the data in Rows(0) in the dsetTempPlaceInfoFromPt.Tables("Places").Item.ItemArray of QuickWatch. Thus it is not null. The dSetPlaces (where I am trying to copy the row to) does not have any tables or rows; is that the problem? Does the ImportRow automatically create the table "Places" in the dataset dSetPlaces if it is not there? Maybe that's my problem. If dsetTempPlaceInfoFromPt.Tables("Places").Rows.Count = 1 Then dSetPlaces.Tables("Places").ImportRow(dsetTempPlaceInfoFromPt.Tables("Places").Rows(0)) I am using .NET 2.0 framework and there are values in the ItemArray of the Rows(0). Help! -- Thank you. Tag: Manipulate Data in a data set Tag: 132200
  - 13
    - Provider Factories We are moving our software to the web using ASP.NET 2.0 and are researching ways to enable our software to connect to multiple databases, specifically Oracle, SQL Server, and ASA. We have used ODBC in a client-server environment in the past, but have now stumbled upon Provider Factories in .NET 2.0. Could you please provide us with the pros and cons of using provider factories? Tag: Manipulate Data in a data set Tag: 132194
  - 14
    - ORA-03113 exception thrown Background - VB.NET v1.1 SP-1. Query Oracle database using Microsoft .NET provider for Oracle (System.Data.OracleClient). Exception is thrown using both get data methods: 1.) OracleCommand.ExecuteReader() 2.) OracleDataAdapter.Fill() Problem - A certain query which happens to contain a Group By and Sum throws an ORA-03113 exception. We traced through alert.log and other logs within Oracle and determined an internal exception of ORA-07445 was thrown when query was executed in the database. I can take the same query and execute it from other query tools fine: sqlplus, plsqldeveloper and etc. I noticed a hotfix that addressed something similar to this, but reading through the documentation this hotfix was included in .NETv1.1 SP-1. I've confirmed that I have SP-1 by looking in registry at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v1.1.4322\1033\SP value is 1. My TestOracleQuery project runs fine for all other Select statements except ones similar to one described earlier. Any help with this ORA-03113 is greatly appreciated. Tag: Manipulate Data in a data set Tag: 132192
  - 15
    - Why does a DataTable serialize so large If I create a simple collection with say 20 columns and 5000 row and a DataTable with the same and serialize both, the DataTable file is at least 2 times the size as the simple collection. What is all the overhead with the DataTable? -Joe Tag: Manipulate Data in a data set Tag: 132189
  - 16
    - Nullable types in strongly typed DataSet Hello, I have a nullable DATETIME column in my SQL Server table, and I have the nullable type DateTime? in my .NET 2.0 application - but how do I make the DateTime field in my strongly typed dataset nullable? When trying to manually enter System.DateTime? in the DataType property of the DataSet, I get "Column requires a valid DataType" - and when trying to change the NullValue property to (null), I get "For columns not defined as System.String, the only valid value is (Throw exception)" - which make it seems to me that I cannot use the nullable datatypes in my DataSet? Is this right? Regards, Nils Magnus Englund Tag: Manipulate Data in a data set Tag: 132182
  - 17
    - poor OracleClient performance? Hi all, in the process of migrating from 1.1 to 2.0 iÂ´m experiencing massive performance losses within the database access to a oracle database (same effect on 9 and 10) the following code is built in 1.1 and 2.0 (except the stopwatch of course). The 1.1 application is finished in less than the half time than the 2.0 app. (talking of 2.1 seconds instead of 4.4 seconds). table1 is a table of about 12000 rows and 35 columns, running well in a production environment. // test button handler: string result = ""; label1.Text = "test running... pls wait"; label1.Refresh(); Stopwatch w = new Stopwatch(); w.Start(); using (OracleConnection oc = new OracleConnection("Data Source=XXXXX.world;Persist Security Info=True;User ID=XXXXX;Password=XXXX;Unicode=True")) { oc.Open(); using (OracleCommand cmd = new OracleCommand("SELECT * FROM table1", oc)) { using (OracleDataAdapter ada = new OracleDataAdapter(cmd)) { using (DataTable dt = new DataTable()) { ada.Fill(dt); } } } } w.Stop(); result += " r: "+w.ElapsedMilliseconds; System.Diagnostics.Debug.WriteLine(result); label1.Text = result; The performance loss can be reproduced with other sql statements and different tables in different Oracle databases. ItÂ´s just the OracleClient assembly that makes the difference. Can anyone confirm this performance loss? --- thanks in advance a Tag: Manipulate Data in a data set Tag: 132179
  - 18
    - GetOleDbSchemaTable throwing an unexpected OleDbException Hello, I have an app that uses this statement to retrieve the procedure name of an Access database: DataTable dbSPS = cnx.GetOleDbSchemaTable(OleDbSchemaGuid.Procedures, null); It's working nicely. However, in a specific database, the same code throws this exception: System.Data.OleDb.OleDbException: The SQL statement could not be executed because it contains ambiguous outer joins. To force one of the joins to be performed first, create a separate query that performs the first join and then include that query in your SQL statement. at System.Data.OleDb.OleDbConnection.ProcessResults(Int32 hr) at System.Data.OleDb.OleDbConnection.GetSchemaRowset(Guid schema, Object[] restrictions) at System.Data.OleDb.OleDbConnection.GetOleDbSchemaTable(Guid schema, Object[] restrictions) Compacting and repairing the database has not helped. I've researched a lot in internet but I haven't found anything related. Any ideas? Thanks in advance, Jos Tag: Manipulate Data in a data set Tag: 132176
  - 19
    - Sql2005 Express in Win2000 pro Hi, When I install Sql2005 Express in Win2000 pro, it failed with : This system did not have the correct version of MDAC installed. Which version is needed for Sql2005 Express when installed in Windows 2000 professional? Tag: Manipulate Data in a data set Tag: 132174
  - 20
    - Connection Pooling With ASP.NET 1.1 Does ASP.NET with ADO connecting to MS SQL Server use connection pooling by default if the connection string is always the same? If not, how does one go about evoking connection pooling ? Tag: Manipulate Data in a data set Tag: 132173
  - 21
    - Can DataSet or DataTable be the "DataSource" of crystal report? I program using ADO.NET and plan to generate a crystal report. Can DataSet or DataTable be the "DataSource" for a crystal report (just like DataGridView) which simplify display of rows and columns? What make up the data source for crystal report? Replies are appreciated... -- Message posted via http://www.dotnetmonster.com Tag: Manipulate Data in a data set Tag: 132172
  - 22
    - Update joined TableAdapter This is a multi-part message in MIME format. ------=_NextPart_000_0006_01C6C716.4EDB4A40 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi! (Read this with font courier new or equal) I have a table adapter which fills a datatable with data from two sql = tables: Properties, and PropCompanyInfo: tbl1.PropertyID pk identity(0,1) tbl1.PropertyName tbl2.ID pk identity(0,1) tbl2._PropertyID tbl2.CompID tbl2.Comment Selected with the query SELECT tbl1.PropertyID, tbl1.PropertyName, = tbl2.ID, tbl2._PropertyID, tbl2.CompID, tbl2.Comment from Properties=20 left outer join PropCompanyInfo on tbl1.PropertyID =3D tbl2.PropertyID = and tbl2.CompID =3D @CID The result is all rows from Properties, joined with PropCompanyInfo = where found. I have a datagrid where the user should add or edit comments (the rows = amount is static). Could look like: PropertyID PropertyName ID _PropertyID CompID Comment 7 Birdland =20 12 Fireland =20 As you can see in this example there are no rows with comments for this = company. Now I want to update tbl2 with all rows that have a comment added. I get = the message that ID don't allow null. I also have to set the _PropertyID = to the same as PropertyID, and the CompID has to be set somehow. Since I have a dataset with a datatable, I think this could be made = without events for the grid and other code? I'm not a full time developer, so I think there are some fundamental = things I don't get here? HELP! Regards Magnus ------=_NextPart_000_0006_01C6C716.4EDB4A40 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.3790.2759" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=3D#ffffff background=3D""> <DIV><FONT face=3D"Courier New" size=3D1>Hi!<BR>(Read this with font = courier new or=20 equal)<BR>I have a table adapter which fills a datatable with data from = two sql=20 tables: Properties, and=20 PropCompanyInfo:<BR><BR>tbl1.PropertyID      pk = identity(0,1)<BR>tbl1.PropertyName<BR>tbl2.ID    &nbs= p;    =20     pk=20 identity(0,1)<BR>tbl2._PropertyID<BR>tbl2.CompID<BR>tbl2.Comment<BR><BR>S= elected=20 with the query SELECT tbl1.PropertyID, tbl1.PropertyName, tbl2.ID,=20 tbl2._PropertyID, tbl2.CompID, tbl2.Comment from Properties = </FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D1>left outer join PropCompanyInfo = on=20 tbl1.PropertyID =3D tbl2.PropertyID and tbl2.CompID =3D = @CID<BR></FONT><FONT=20 face=3D"Courier New" size=3D1>The result is all rows from Properties, = joined with=20 PropCompanyInfo where found.</FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D1><BR>I have a datagrid where the = user should=20 add or edit comments (the rows amount is static).<BR>Could look=20 like:<BR>PropertyID  PropertyName  ID =20 _PropertyID  CompID =20 Comment<BR>7           = Birdland       </FONT></DIV> <DIV><FONT face=3D"Courier New"=20 size=3D1>12         =20 Fireland      <BR></FONT><FONT = face=3D"Courier New"=20 size=3D1></FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D1>As you can see in this example = there are no=20 rows with comments for this company.<BR>Now I want to update tbl2 with = all rows=20 that have a comment added. I get the message that ID don't allow null. I = also=20 have to set the _PropertyID to the same as PropertyID, and the CompID = has to be=20 set somehow.</FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D1></FONT> </DIV> <DIV><FONT face=3D"Courier New" size=3D1>Since I have a dataset with a = datatable, I=20 think this could be made without events for the grid and other=20 code?</FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D1></FONT> </DIV> <DIV><FONT face=3D"Courier New" size=3D1>I'm not a full time developer, = so I think=20 there are some fundamental things I don't get here? HELP!</FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D1></FONT> </DIV> <DIV><FONT face=3D"Courier New" size=3D1>Regards = Magnus</FONT></DIV></BODY></HTML> ------=_NextPart_000_0006_01C6C716.4EDB4A40-- Tag: Manipulate Data in a data set Tag: 132170
  - 23
    - Restore fail in Asp.Net I use asp.net to restore a SqlServer database. I use the code: Restore database MyBase from disk = 'c:\xxx.bak' with Replace But after execute, it display an error message: Restore fail, the user did not have the previllage to RESTORE DATABASE 'MyBase' How can I do? Tag: Manipulate Data in a data set Tag: 132169
  - 24
    - Accessing ODBC DSNs Way back in the old ASP days, it was possible to open a Database connection by providing only the name of the ODBC DSN that I'd created earlier. I didn't need to indicate which driver, whether the connection was to SqlServer or something else, etc. It looked like: Conn = Server.CreateObject("ADODB.Connection") Conn.Open "MyNamedDSN" In C#.Net, I'm trying to figure out what connection string I provide when I do Conn = new OleDbConnection(ConnString); if I want to connect via an ODBC DSN instead of specifying the details in the ConnectionString itself. Can you help with this? Thanks. Alex Tag: Manipulate Data in a data set Tag: 132168
  - 25
    - DeriveParameters throws NummReferenceException Hi, I am coding under .Net compact framework and using System.Data.SqlClient connect to MS SQL server through PDA USB cradle. I can execute stored procedures and sql select or updates statements. But I always get NullreferenceException when I try to use DeriveParameters function of SQLCommand to get parameters of my stored procedure? Any idea? I tried the same function under .Net framework, it works fine. I am using SQLHelper the function is DiscoverSpParameterSet(SqlConnection connection, string spName, bool includeReturnValueParameter) And I got exception on this line SqlCommandBuilder.DeriveParameters(cmd); Anybody has experienced this before. Is it a bug for .NET CF(cannot use DeriveParameters function)? Do I have to explicit assign those parameters for my stored procedures (that would be a painful coding) thanks in advance -rockdale Tag: Manipulate Data in a data set Tag: 132166
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  - 1
    - Please tell me what is wri=ong using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Data.SqlClient; using System.Data.Common; namespace trial_a { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { string connect_string = "SELECT * FROM Customers, Invoice"; using (SqlConnection conn = new SqlConnection()) { conn.ConnectionString = "server = fred\\sqlexpress; database = newdb;integrated security = true"; using (SqlDataAdapter da = new SqlDataAdapter(connect_string, conn)) { using (DataSet ds = new DataSet()) { da.TableMappings.Add("Table", "Customers"); da.TableMappings.Add("Table1","Invoice"); da.Fill(ds,"Table"); try { DataTable dt1 = ds.Tables[0]; DataTable dt2 = ds.Tables[1]; textBox1.Text = dt1.Rows[0].ItemArray[0].ToString(); textBox2.Text = dt2.Rows[0].ItemArray[0].ToString(); } catch (Exception x) { MessageBox.Show(x.Message); } } } } } } } Tag: Manipulate Data in a data set Tag: 132162
  - 2
    - 1:1 Relation I have created a DataSet out of an SQL Server DB. In the server, there are several 1:1 relations, in the graphical representation of the DataSet in Visual Studio, it seems as if there were just 1:n relations. Why? Is it a bug in VS 2005 or is it impossible for an autogenerated DataSet to understand those relations? Tag: Manipulate Data in a data set Tag: 132160
  - 3
    - First connection to the database (Oracle) from a .Net console application takes 6 sec Dear All, I am using Oracle Client 8.1.7.0.0. My .Net (c#) console application makes a connection to Oracle database and has following code Console.WriteLine(DateTime.Now.ToString()); OracleConnection NDPConnection = new OracleConnection("User ID=<Username>;Data Source=O801;Password=<Password>;"); NDPConnection.Open(); Console.WriteLine(DateTime.Now.ToString()); NDPConnection.Close(); It is observed that the Open method takes almost 6 sec the first time it is executed. Next all instances of the application opens the connection very fast. Next time again when the code is executed after restarting the machine, opening the connection takes almost 6 sec. Is there something to improve this? Have I missed something? Please help. Thanks & regards Sunil Tag: Manipulate Data in a data set Tag: 132158
  - 4
    - subquery is not working for CSV files HI, this is my query, I am using C# , OleDB, ADO.NET and CSV files. SELECT [GATEWAY],[IPADD], SUM(MOBILE),SUM(NWD), TOTAL FROM [rawdata.csv] where CVDate([START]) >= '7/29/2006' AND CVDate([END]) <= '8/23/2006' AND [GATEWAY] IN (SELECT [GATEWAY] FROM [gateways.csv] WHERE [CLIENT]='MR. XXX') GROUP BY [GATEWAY],[IPADD] ORDER BY [GATEWAY] it returnes no rows. but I have done it in mysql with same data file and same query. it worked. why it's not working ? is there any problem in subquery syntax ? please give me a solve. Tag: Manipulate Data in a data set Tag: 132156
  - 5
    - Avoid hardcoding DataKeyField property of DataGrid... Hi, How can I avoid hardcoding the name of the DataKeyField property of a DataGrid ? Like: datagrid.DataSource = someSource; datagrid.DataKeyField = "employeeId"; The above works but it's not what I want, because whenever the name of the field changes, I'm screwed. Avoiding this is the purpose of strongly-typed datasets (or using collections or whatever data layer abstraction mechanism you like) as I understand it, but I'd like to know what you n-tier gurus do in this case ? Thanks, - Jeff Tag: Manipulate Data in a data set Tag: 132149
  - 6
    - Can not find SQL Server Management Studio Hello, today I installed the Microsoft SQL Server 2005 Standard Edition but after insatallation I can not find the SQL Server Management Studio (Enterprice manager) Need I to install it separately? Regards, Alfred M. Tag: Manipulate Data in a data set Tag: 132139
  - 7
    - Problems with using ODP.NET provider Hello All I'm using this query Select Distinct(prj.Name) as PrjName, prj.oid as PrjOid From SITE61.PRJMGTProjectRoot prj, SITE61.CORERELATIONDEST ic, SITE61.PRJMGTDatabase pd Where prj.oid=ic.oidTarget And ic.oid=pd.oid And pd.oid= :plant_oid and getting a data-reader like this: Dim cmdSQL As New OracleCommand Dim conSQL As New OracleConnection Dim drSQL As OracleDataReader conSQL.ConnectionString = oRequest.ConnSetting conSQL.Open() cmdSQL.Connection = conSQL cmdSQL.CommandText = oRequest.Command cmdSQL.CommandType = oRequest.CommandType cmdSQL.BindByName = True AddParameters(cmdSQL, oRequest.Parameters) 'Add the prm with name plant_oid and 'a RAW value. So far so good 'I then get an exception when I try to do the ExecuteReader 'Invalid parameter binding 'Parameter name: plant_oid return cmdSQL.ExecuteReader(CommandBehavior.CloseConnection) Any ideas what might be wrong here ? thanks Sunit Tag: Manipulate Data in a data set Tag: 132136
  - 8
    - Accessing Data Source of SSAS Project from within an SSAS Assembl Hi all, within an SQL Server Analysis Services project we are using an assembly to retrieve dimension permissions based on data stored in a adminstration database. Currently we store the connection string used to access in the administration database within the assembly: Dim locCon As New SqlConnection ... locCon.ConnectionString = "data source=eira; database=ServiceAdmin; Integrated Security=SSPI;" ... Obviously this is not a nice solution. As I understand it is not possible to access a application.config file from a DLL, because the DLL will use the config file belonging to the corresponding application. I wonder if it is not possible to access one of the data sources deployed with the cube from the assembly. somthing like: locCon.ConnectionString = "data source=cubedatasource" with cubedatasource beeing the name of the data source used in the cube Well, it doesn't seem to work that way. Any help is appreciated Thanks bjh Tag: Manipulate Data in a data set Tag: 132127
  - 9
    - DataTable Edit Rows I've searched and tried a few of the things I seen but nothing really helped me. I am in visual studio 2003 and using visual c++. I created a table by typing in the data inside the IDE. Inside the load event for the form I added rows to the table ataRow *myRow; myRow = dataTable1->NewRow(); myRow->Item[COL_COMPONENTS] = S"X-Axis"; myRow->Item[COL_UNITS] = S"Inches"; dataTable1->Rows->Add(myRow); myRow = dataTable1->NewRow(); myRow->Item[COL_COMPONENTS] = S"Y-Axis"; myRow->Item[COL_UNITS] = S"Inches"; dataTable1->Rows->Add(myRow); Now I want to edit a row. Change a column that was previously set to a null value. What I have so far is myRow = dataTable1->Rows->Item[rowNum]; myRow->BeginEdit(); myRow->Item[COL_CURRPOS] = tmp; myRow->EndEdit(); dataTable1->AcceptChanges(); Where rowNum = a known index number of the row I want to change, and COL_CURPOS is the column I want to make changes to. tmp is the variable holding the value I want to post to that column of said row. I have tried without the begin/end edit and without the acceptchanges... nothing seems to result in the column on my table being changed? Tag: Manipulate Data in a data set Tag: 132125
  - 10
    - Writing a Memo field to an Access DB with OleDB Hello, I have big problem on updating an Access Memo field with OleDb. While the InsertCommand works, then UpdateCommand raises an exception: Syntaxerror in UPDATE-Statement. I tryed various work arounds (the last 3 days) with and without the CommandBuilder with allways the same result. The last attempt was: Public Function WriteMemoToAccess(ByVal Pars As String) As Boolean 'Parameters is the ColumnName of the Access Memo field Dim AccessCommand As New OleDb.OleDbCommand("UPDATE DocH SET Parameters=? WHERE IdNum = 1") Dim QueryParameter As New OleDb.OleDbParameter("@Parameters", _ OleDb.OleDbType.LongVarWChar, Len(Pars), ParameterDirection.Input, True, _ Nothing, Nothing, Nothing, DataRowVersion.Current, Pars) AccessCommand.Parameters.Add(QueryParameter) AccessCommand.Connection = Me.Connection Me.Connection.Open() Try AccessCommand.ExecuteNonQuery() WriteMemoToAccess = True Catch ex As Exception End Try Me.Connection.Close() End Function Is there a way to do this?? Best regards Alfred Malleier (South Tyrol) Tag: Manipulate Data in a data set Tag: 132118
  - 11
    - Why Must I Have "SET DATEFORMAT dmy" in Stored Proc? I'm calling a stored proc from C# and the call includes a datetime. The exe can run on machine A or B but the database is on machine C. When I run on machine A I need SET DATEFORMAT dmy in the proc or I get an 'out-of-range datetime value' message. I need to comment this statement out when the call is made from machine B. It seems as though I have a UK locale on machine A and a US locale on machine B and the swapping of days and months causes the error. Is this locale setting per machine possible? If so then how to change it? TIA, jeb. Tag: Manipulate Data in a data set Tag: 132116
  - 12
    - saving datatable as new table in database i am creating a Datatable in memory and would like to save the DataTable as a new table in the database when i am done. How can I do this? thanks m Tag: Manipulate Data in a data set Tag: 132112
  - 13
    - dataset safety? Hi, I am currently looking at re-writing a payroll/timesheet application that is currently in Access. The users need to enter timesheet hours for numerous employees. Up till now I have been experimenting and using strongly typed datasets as generated by VS. However as these provide a disconnected model, how can I prevent the loss of user data if the user PC crashes or dies for whatever reason. I imagine it would be inefficient to be performing writes to the database using datasets after every record is inserted. I like the binding and coding efficiency of using strongly typed datasets, however it would seem like there can be big overheads and risk in not updating to the database regularly. Can anyone recommend a better way? thanks Tag: Manipulate Data in a data set Tag: 132107
  - 14
    - OCI.DLL: The specified module could not be found + OCIEnvCreate fa In VS2005 (Version 8.0.50727.42), I'm trying to create a "Data Connection" in the "Server Explorer" window ... I right click on "Data Connections" ... and choose "Add Connection" ... In that window, I change the "Data Source" to "Oracle Database" ... Then for "Server Name" I enter "newbisd.world", which corresponds to an entry in my TNSnames.ora file ... and I type in my Username and Password ... Then, when I hit either "OK" or "Test Connection", I get an error box titled "OCI.DLL" that says "The specified module could not be found" ... and after I click "OK" to that, another one comes up saying "OCIEnvCreate failed with return code -1 but error message text was not available." Where do I start? Thanks for any tips / pointers ... other info ... - I'm running Windows 2000 5.00.2195 (SP4) - I'm running Oracle 9.2 ... have upgraded to this - I can connect to the database with Oracle SQL*Plus ... and TOAD - I've read Paul Clement's reply to MikeB from 7/22/2005 and gave Authenticated User privelege to the ORACLE_HOME ... - According to my registry (when viewd by Regedit), in the HKEY_LOCAL_MACHINE folder + SOFTWARE folder + ORACLE folder, the variable ORACLE_HOME = C:\oracle\ora92 (... and I have a similar entry in a subfolder called HOME0) ... and in this folder's "bin" directory, I've got a file named "oci.dll" that's 112KB dated 05/01/2002 8:40pm Tag: Manipulate Data in a data set Tag: 132103
  - 15
    - Oracle 10g Float and Double Database Datatypes are not supported Greetings, I have data values that are inherently of type Double. Current we are using Oracle Column Datatype NUMBER. When I create a TableAdapter in VS2005, the database table column information is read from Oracle and a new Table is created. However, the detected datatypes are always Decimal. Even if I change the datatype in the Database to a lower precision that would not exceed the precision of a Double, it is always detected as a Decimal. This forces me to cast everywhere, making the strongly-typed dataset, not as useful. Option 1: Now you might wonder, why not just change the datatype after the table is created. This does in fact work, but if you alter the Select statement later, the table is regenerated and since the datatypes no longer match what was found in the database, new columns are added with a "1" appended to the column name, which wrecks everything. So, I have to delete all the columns first, then make my SQL change, then go back and change all the datatypes back to what I need them to be. This sucks. Option 2: Use the new Oracle 10g BINARY_DOUBLE column datatype. This would be the preferred solution, but Microsoft apparently does not support it. Even though this may be perfectly matched with the precision of a System.Double. Option 3: Microsoft should detect the Precision and Scale of the NUMBER datatype in Oracle and use the appropriate .NET datatype instead of always using Decimal. I believe this is done is other MS products via ODBC, but not here... Question: Is there ANY numeric datatype I can use in Oracle that will be detected by the the MS Oracle Data Provider as a System.Double in the Strongly-Typed representation? I fear this answer is no. If it is, Microsoft should provide a hotfix to allow Option 2 or Option 3 to work. Without one of these solutions, maintenance will be a big pain. Other developers on my team, should be able to go into the Query Builder, check off a new column for the Select statement, and this should just add the new column, but this doesn't work. It makes a mess, and can go almost unnoticed until you build and a list of cast exceptions appears... Hence the big pain. -Valkyrie-MT Tag: Manipulate Data in a data set Tag: 132102
  - 16
    - multi threaded database access with transactions I have a program that runs on multiple threads working with database sproc calls... these need to be all ran in transactions.... how can I get something similar to parallel transactions or at least to the point where they dont cause each other to crash? They all work with the same database connection...thanks! Tag: Manipulate Data in a data set Tag: 132099
  - 17
    - MySQL database connection Hi, All This is the first time that I code asp.net against mySQL database. I am confused that which connector should I use 'cause I do not want make the wrong choice and have some problems later on? one is from mySQL official website http://www.mysql.com/products/connector/net/ or ODBC/OleDB driver come with MS .Net? Any experience can share with? Thanks a lot -rockdale Tag: Manipulate Data in a data set Tag: 132093
  - 18
    - Global Cancel I want to create a single Cancel method to cancel all changes made to any fields in a UserControl. I have a method that creates a Binding object, adds it to a collection and than adds the Binding to the control. textBox1.DataBindings.Add(CreateDataBinding("Text", myobject, "Caption") ); public void Cancel() { foreach (Binding b in this.Bindings) b.BindingManagerBase.CancelCurrentEdit(); // This never changes the value back } Is there anyway to create something like I want? Thanks, Joe Tag: Manipulate Data in a data set Tag: 132089
  - 19
    - Retrieving database schema Hi Everyone: Iâ??m new to the VB.NET development platform, and Iâ??m trying to understand how to retrieve database schema information from either of these databases: Microsoft Access, Microsoft SQL Server 2000, or Oracle. I recently bought a reference book titled â??Beginning VB.NET Databasesâ?? by Thearon Willis from WROX press. From this book I have found a way to dynamically connect to any database and check to see if the connection was successful. What I would like to do is once the connection to the database is established, show a list of the tables contained in the selected database. If the user needs to add data to a specific table he would select the table he needs to add the data too and the application would create a datasheet with the columns (Fields) of the database shown in the order they where created in the table. I would also like to label the primary key of the table and any foreign keys that table references. Iâ??m having difficulty in finding examples of these types of operations. Can anyone show me where to go to find this information. Thank you, -- Mark Tag: Manipulate Data in a data set Tag: 132088
  - 20
    - Count rows in dataset WHERE ... Hi, I am attempting to do a number of count functions on a single table of data for presentation in an ASP webpage. The functions are number today, number this week, number this month etc. As the Database table is large it does not make sense to query it directly a number of times. My idea is to create a dataset containing the table "ApplicationForms". I then want to query this and perform the various count functions. If I were querying the database the query would be: SELECT COUNT(DISTINCT fkiBatchNumber) AS 'YearCount' FROM tblApplicationForms WHERE (dtDateScanned < dtYear) dtToday is a datetime predefined in C# code. I have no idea how to query the dataset in an equivilent manner. Is this the most suitable method of acheiving my requirement? If so, any help in doing so is much appreciated. Thanks. Tag: Manipulate Data in a data set Tag: 132081
  - 21
    - Oracle TransactionScope Rollback issue I am having problems re-openning closed Oracle connections (System.Data.OracleClient.OracleConnection) when using TransactionScope and using the Rollback feature (i.e. not calling Complete on TransactionScope). I create a simple for loop with a TransactionScope statement inside. All that happens inside the TransactionScope section is an open and close of an OracleConnection object, and no call to Complete on the TransactionScope object (Rollback). The second iteration or the loop will hang when calling Open on the OracleConnection object. If you include the Complete call on the TransactionScope, it will work fine. If you exclude TransactionScope, it will work fine. If you step through the code, it will work fine. If you put a System.Threading.Thread.Sleep(50) statement at the beginning of the loop, it will work fine. I thought it might be a disposing/garbage collection issue, so I tried putting GC.Collect at the start of the loop, but that didn't work. If I use Oracle's provider, it will work fine (Oracle.DataAccess.Client). If you leave the connection open when iterating through the loop, it appears to work fine. I have the 9.2.00.54 Oracle client installed. I have some sample code listed below. We would really like to use the System.Data.OracleClient as opposed to the Oracle.DataAccess.Client. So, any suggestions would be greatly appreciated. Thanks. using System; using System.Collections.Generic; using System.Text; using System.Transactions; using System.Data.OracleClient; //using Oracle.DataAccess.Client; using System.Data; namespace ConsoleApplication2 { class Program { const string DATASOURCE = "Data Source=test_db;User Id=sam;Password=sam;"; static OracleConnection cn; static int i; static void Main(string[] args) { cn = new OracleConnection(DATASOURCE); for (i = 0; i < 100; i++) { TransactionScopeTest(); //TransactionScopeCompleteTest(); //TransactionScopeTestWithSleep(); //ConnectionTest(); } Console.ReadLine(); } static void TransactionScopeTest() { using (TransactionScope ts = new TransactionScope()) { OpenClose(); } } static void TransactionScopeCompleteTest() { using (TransactionScope ts = new TransactionScope()) { OpenClose(); ts.Complete(); } } static void ConnectionTest() { OpenClose(); } static void TransactionScopeTestWithSleep() { using (TransactionScope ts = new TransactionScope()) { System.Threading.Thread.Sleep(50); OpenClose(); } } static void OpenClose() { if (cn.State != ConnectionState.Open) { Console.WriteLine("ConnectionState: " + cn.State.ToString() + "; openning " + i.ToString()); cn.Open(); Console.WriteLine("ConnectionState: " + cn.State.ToString() + "; openned " + i.ToString()); } if (cn.State != ConnectionState.Closed) { Console.WriteLine("ConnectionState is " + cn.State.ToString() + "; closing " + i.ToString()); cn.Close(); } Console.WriteLine("ConnectionState is " + cn.State.ToString() + " " + i.ToString()); } } } Tag: Manipulate Data in a data set Tag: 132078
  - 22
    - dataset - Insert-query with stored procedure using wizard Hi all, I don't know where to publish this question but hope this newsgroup is okey. I'm working in Visual Studio 2005 and are now creating a dataset file where I will do all the transactions with the database. I have a consumer table where I want to insert, update and delete consumers. In the database I use uniqueidentifier on the primary key and said that it is a rowGuid - (newid()). When I try to generate a stored procedure to insert new consumers I have to insert without adding the primary key because it is automatically generated on a new insertion. However when using the wizard to generate the stored procedure the wizard fails when I remove the primary key. After the insert query the wizard created a select query with a where - clause like the primary key variable. (uidConsumerID = @uidConsumerID). Here I changed to SCOPE_IDENTITY( ) instead to get the databaserow from the current scope. But this fails. So what's wrong? What is the best way to make an insertion to a row using RowGuid on the primary key? Until further I will try to create the sp manually in the database and force dotnet to use my own stored procedure. In advance thanks a lot for your help! Kind regards, Jon Haakon Tag: Manipulate Data in a data set Tag: 132069
  - 23
    - Newbie needs help Hi everyone, I'd like to access a database using C#. I've installed the Visual Studio 2003 and mysql essential and mysql administrator. On Visual Studio I go on server view and right click on SQL Servers, then I click on Register SQL Server Instance. It will prompt me to enter the instance name and login information but I'm getting this error - [DBNETLIB][ConnectionOpen(Connect()).]SQL Server does not exist or access denied. I'm sure that my username and password are correct. The only thing I'm not sure of is the instance name? Is the instance name the same as service name - such as MySQL in Services? Any help? Thanks, Clayton Tag: Manipulate Data in a data set Tag: 132068
  - 24
    - Keyword similar to App(VB6.0) in VB.NET Hello all, Can anyone here suggest me the keyword App similar to that in VB.NET? Iam developing a application which uses MS-Access as the database. In vb6.0 I use App to find the path and connect to the database example: dbname = App.Path & "\XXXXXX.mdb" Could anyone here please suggest me a way similar to that of App I know how to connect to database. example dbname = "C:\Temp\xxxxx.mdb" con.Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & dbname & ";Persist Security Info=False") Thanks in advance Jack Tag: Manipulate Data in a data set Tag: 132065
  - 25
    - OleDb vs. Sql Interoperability I'm building a lot of ASPX pages and business objects that consume and interact with database data. Some of this is done with data-binding, some is done with programmatic calls to Stored Procedures, Views, etc. I've created a DB class that I use to simplify and make consistent my inteaction with the database, and for all of the aspects of connecting to the database, building the call (query, Stored Procedure, Stored Procedure with Parameters, etc.) that works just fine. But here's my problem: Data that is returned comes back in objects like XXDataReader (OleDbDataReader or SqlDataReader). If I use one of these in my .aspx Pages, it means I've committed to using either OleDb for my database access of SqlClient for my database access. What if I don't want to have to decide? What if I want to set things up so that, if I want to switch from a SqlServer to some other database backend, I can just change my DB class, but not have to touch all of my pages and other objects? What's the most elegant and prefered way to do this? I know that I *could* just use OleDb for everything (including SqlServer), but that seems like such a shame in that I understand that the SqlClient access for SqlServer is supposed to be *way* more efficient. Alex Tag: Manipulate Data in a data set Tag: 132054

Sorry if this is a basic question but I was wondering how to test the
dataset information as it is being read.

ex, I have a table that contains file extentions such as .xls, .doc,
.ppt. What I want to do is test the dataset as they are being written
and if the dataset is equal to .xls i want it to be excel..

I am new to this and am able to connect to the table but I just can
seem to get a handle on how to test the current dataset record and make
any changes. any bump in the right direction would be helpful ...
thanks in advance

Top

Re: Manipulate Data in a data set by Cor

Cor
Fri Aug 25 22:59:12 CDT 2006

Jerremy,

I get the idea that you mix up a dataset with an XML file.

A dataset is an XML file where the tags etc are used in a special way.

It has if it is not nested only elements, which are 3 deep.

There are lot of other types of XML files, by instande for Excel, For Words
etc.

XML is however not the subject of this newsgroup, for that are probably
better newsgroups.

I hope however that this helps a little bit.

Cor

"Chicagoboy27" <jeremy.bird@gmail.com> schreef in bericht
news:1156531241.061396.17350@b28g2000cwb.googlegroups.com...
> Sorry if this is a basic question but I was wondering how to test the
> dataset information as it is being read.
>
> ex, I have a table that contains file extentions such as .xls, .doc,
> .ppt. What I want to do is test the dataset as they are being written
> and if the dataset is equal to .xls i want it to be excel..
>
>
> I am new to this and am able to connect to the table but I just can
> seem to get a handle on how to test the current dataset record and make
> any changes. any bump in the right direction would be helpful ...
> thanks in advance
>

Top