DataSet and MappingType

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  - 1
    - I would learn ADO.NET 2.0 - There are Tutorials or online books? Dear friends I have installed visual basic 2005 beta 2 and sqlexpress 2005 and by video tutorial downloaded from visual basic express site I have created a very simple database application. This tutorial create database application utilizing IDE Wizard, instead I would learn to created it by program in VB.NET language. 1)Do you know the existance of free tutorial or book on ADO.NET 2.0? 2)Is SQLServer 2005 Online book good for my pourpose? 3)Is an old ADO.NET book good or ADO.NET 2.0 is very different Please reply me soon .... Thank for your patience Tag: DataSet and MappingType Tag: 116565
  - 2
    - Thru Windows Service connecting to SQL server database using windows authentication Hi I am trying to connect to SQL server data base using NT authentication from my window service code. _bstr_t bstrConn = _bstr_t("PROVIDER=SQLOLEDB;SERVER=SD1;DATABASE=MEDICAPT;TRUSTED_CONNECTION=YES;"); m_pConnGenGuiDB->ConnectionString = bstrConn; m_pConnGenGuiDB->CommandTimeout = 600; m_pConnGenGuiDB->Open("","","", adConnectUnspecified); I am getting error Description = Login failed for user 'NT AUTHORITY\SYSTEM' The same code works fine in any MFC application. Any body have clue abt that Tag: DataSet and MappingType Tag: 116564
  - 3
    - Problem getting table schema with OracleDataAdapter.FillSchema Hi, I'm getting table schema of all my database tables by calling FillSchema method of OracleDataAdapter class with SchemaType.Source option. It works correctly for all tables but one: debugging, the execution rests inside FillSchema method and never finishes (no exceptions, no timeout). Does anybody know any reason that makes happen this? Thank. Tag: DataSet and MappingType Tag: 116562
  - 4
    - read only data fetching hi all i have some modules in my app.. reads data (always) i am using datareader and should i set any transaction and isolation level so that like specified in MSDN, lower isolation level will give lot of performance.. should i include a "select * from.." inside a transaction? i thought single sql statement does not require any transaction decl. pls clarify me regs sahridhayan Tag: DataSet and MappingType Tag: 116561
  - 5
    - .net & Visual FoxPro error Hi Everyone, This is my code for making a connection to a Visual FoxPro free table and querying it. I get the following error message File iddxstrippunc.prg does not exist I have tested the dsn through access link tables and it seems to work fine. Any help would be appreciated. Thanks, V.V. ********************************************************* Dim oConn = CreateObject("adodb.connection") Dim mdconnString As String Dim MDWSql As String Dim oRS As ADODB.Recordset mdconnString = "Provider=vfpoledb;DSN=vfxpdsn" oConn.ConnectionString = mdconnString Try oConn.Open() ' Open VFP Connection If oConn.State = ADODB.ObjectStateEnum.adStateOpen Then MsgBox("Connection was Successful") Else MsgBox("Connection Failed") End If oConn.BeginTrans() MDWSql = "SELECT * FROM patients where externalid = ""CB1855""" oRS = oConn.Execute(MDWSql) Catch ex As Exception MsgBox(ex.Message) Close() End Try Tag: DataSet and MappingType Tag: 116550
  - 6
    - Grouping?? Hello, I have a dataset that has rows with data that are all different. In some of the rows the "DescID" and "PlaceID" are the same, but primarilly they are all different. What I am trying to do is group all the rows that have the same DescID and PlaceID. If there are multiple rows with these two colomns being the same I need the Quantity Field to be increased by 1. IE ID DescID PlaceID Quantity 1 34D 81C 1 2 36P 81C 1 3 34D 81C 1 4 32F 14T 1 This should be the result after grouping them ID DescID PlaceID Quantity 1 34D 81C 2 2 36P 81C 1 3 32F 14T 1 Any suggestions will be greatly appreciated. The data will be saved to a SQL Database after this is accomplished. Thanks, Chuck Tag: DataSet and MappingType Tag: 116540
  - 7
    - HasChanges does not change even after EndCurrentEdit() is called HELP! I am losing my mind. I can't figure this out. I have a dataset and a textbox that is bound to it. I edit the textbox value and click a button to submit the changes to SQL CE server. I call EndCurrentEdit(), and then I check the value of HasChanges(). I always get a false. What am I doing wrong? Here is the trimmed down version of the code. Please don't worry about the data adapter and changes to the DB. If I can get the HasChanges to work, then I think the data adapter will also work. ------------Begining of Code------------ ' In my form load sqlCnn =3D New SqlCeConnection("Data Source=3D" & mPath & file & "; Password=3D;") sqlCnn.Open() sqlCmdText =3D "Select * from TblClasses where termKeyID =3D 1 Order by class" sqlCmd =3D New SqlCeCommand(sqlCmdText, sqlCnn) da.SelectCommand =3D sqlCmd sqlCmdBld =3D New SqlCeCommandBuilder(da) da.UpdateCommand =3D sqlCmdBld.GetUpdateCommand da.InsertCommand =3D sqlCmdBld.GetInsertCommand da.DeleteCommand =3D sqlCmdBld.GetDeleteCommand da.Fill(ds, "TblClasses") TextBox1.DataBindings.Add("Tex=ADt", ds.Tables("TblClasses"), "class") ' End of Form ' My Button even Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click TextBox1.BindingContext(ds).En=ADdCurrentEdit() MessageBox.Show(ds.HasChanges(=AD)) End Sub ------------End of Code------------ I edit the text box, and click the button. The messagebox.Show(ds.HasChanges(=AD)) always returns a false. I can't get it work no matter what I do.=20 Please HEEEELP! Tag: DataSet and MappingType Tag: 116534
  - 8
    - Connection to Oracle - Help Hi I'm new in ASP.NET I have TNSNAMES.ORA with all information I need I have the path of TNS_ADMIN correctely pointing to TNSNAMES.ORA folder This is true because I have no problems conecting to Oracle using VB 6 or VBA With ASP.NET I get always TNS error Did I miss something ? what's worng ? do I need a Project Reference like VB 6 ? thank you very much for any help My sample code is as follow : Imports System Imports System.Data Imports System.Data.OleDb Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim sConnectionString As String = "Provider=MSDAORA.1;User ID=v0efalm;password=cila01;Data Source=CEN;Persist Security Info=False" Dim mySelectQuery As String = "SELECT sysdate FROM dual" Dim myConnection As New OleDbConnection(sConnectionString) Dim myCommand As New OleDbCommand(mySelectQuery, myConnection) 'Set the parameter value. 'myCommand.Parameters.Add("@p1", OleDbType.Char, 5).Value = "Test%" 'Open connection to Oracle database. myConnection.Open() 'Populate the DataReader. Dim myReader As OleDbDataReader = myCommand.ExecuteReader() Dim RecordCount As Integer Try While myReader.Read() RecordCount = RecordCount + 1 Console.Write(myReader.GetString(0).ToString()) End While If RecordCount = 0 Then Console.Write("No data returned") Else Console.Write("Number of records returned: " & RecordCount) End If Catch ex As Exception Console.Write(ex.ToString()) Finally 'Close all objects. myReader.Close() myConnection.Close() End Try End Sub Tag: DataSet and MappingType Tag: 116533
  - 9
    - The conneciton in DataAccess block Thanks, There are many other convenient function in DataAccessBlock like ExecuteDataset, ExecuteScalar, they all return some object or dataset.. I think they all must open a connection in their funciton. When I call them like: string cnnStr="..."; sCmd="Select .."; DataSet ds=ExecuteDataset(cnnStr, CommandType.Text, sCmd); Will it close the connection after return value? Tag: DataSet and MappingType Tag: 116530
  - 10
    - BUG Found : DB2 OleDB Connections not closing with Framework v1.1 Problem : Calling .Close() or using {...} (or any combination or these) with a OleDBConnection does not close the connection to DB2. Solution : Uninstall Framework v1.1 Service pack 1 Using : IBM OleDB Provider version ("DB2 v8.1.6.574") Reproducible on W2k and XP. Any solution to this problem would be appreciated as SP1 fixes some other issues that I had but violates the connections. This is working at another client who is using an UDB Gateway to their DB2 with Framework 1.1 sp1 Thanks Johan Tag: DataSet and MappingType Tag: 116528
  - 11
    - SQL Error - PLEASE HELP Hi, My app (VB.NET, .NET Framework 1.1) intalls database tables for a database. Then it is supposed to create full-text catalogs. It works well on my machine but not on another machine. here is error message I get: An unhandled exception of type 'System.Runtime.InteropServices.COMException' occured in microsoft.visualbasic.dll Additional informatioN: [Microsoft][ODBC SQL Server Driver][SQL Server]The sepcified @server_name (IPAddress) does not exist. I use within my code : dim oSQLServer = CreateObject("SQLDMO.SQLServer") oSQLServer.Connect(strServer, strUserID, strPassword) to create sqlserver object and connect to it in order to proceed with creating my full-text catalogs. As mentioned previously, this application works perfectly on my machine, but not on another. Any help will be appreciated _dino_ Tag: DataSet and MappingType Tag: 116518
  - 12
    - Wii close connection? I have a function call MyExecuteNonQuery(see bellow) When I call it with some Sql command like: MyExecuteNonQuery("Delete from myTable); Will it close the conneciton which opened in MyExecuteNonQuery? ---------------------------------------------------------------------------- public int object MyExecuteNonQuery(string sSql) { string cnnStr="...."; SqlConnection cnn = new SqlConnection(cnnStr); SqlCommand myCommand = new SqlCommand(sSql, cnn); cnn.Open(); int iRV=myCommand.ExecuteNonQuery; return iRV; } /* Tag: DataSet and MappingType Tag: 116514
  - 13
    - Question about DataAccess Block I user DataAccess Block in my progrm. http://www.microsoft.com/downloads/details.aspx?FamilyId=F63D1F0A-9877-4A7B-88EC-0426B48DF275&displaylang=en I often uses the code: string sSql="Select..."; string cnnStr="...."; SqlDataReader dr=SqlHelper.ExecuteReader(cnnStr, CommandType.Text, sSql); .... dr.Close(); Dose it will colose the connection when I close the SqlDataReader with dr.Close()? Tag: DataSet and MappingType Tag: 116513
  - 14
    - How to change the value of timeout in program When usr process some data in program, it will result in time out. How to change the value of timeout in program? Tag: DataSet and MappingType Tag: 116509
  - 15
    - Anyone have a DAL Generator? Hello everyone, Anyone out there have a DAL Generator Utility for sale for free that mimics what happens in the IDE designer when you drag a dataadapter onto a component? I like what MS did here, I just don't like the instantiation of all the objects on New(). They Do: Sub Initialize() da1 = new dataadapter da2 = new dataadapter sqlconn = new connection(someconnectionstring) selectcommand1 = new command .... I want to do readonly property da1 as dataadapter get if m_da1 is nothing then m_da1 = new dataadapter m_da1.connection = GetConnection 'Add transaction support if m_intransaction then dim cb as commandbuilder .... 'Add event handlers addhandler m_da1..... I have 40 tables, that is a lot of copy and paste, and too many chances to get it wrong and wind up chasing redherrings. Plus if I make and schema changes, I would have to manually correct the changes in my DAL. I have been playing with creating my own generator, and realized that they is way too much I don't know and understand about what goes on to make a generic tool nor do I have the time to get the tool to a point where I can use it for my application. I spent 4 days manually setting up my DAL more consistent with a format that I wanted. Now the business has come back with some additional changes and I must begin this arduous process again. Thanks in advance Tag: DataSet and MappingType Tag: 116494
  - 16
    - Batch Statements I have used simple batch statments with C# (ans SQL Server 2000).for example: string select = "select model from cars where id = ?;select * from trucks where model = ?"; where ? is a parameter whose value i have before running the bach statment. I was wondering if it possible to use the value retuned in the first statement for the where clause in the second in the statment? TIA, Vinny Tag: DataSet and MappingType Tag: 116493
  - 17
    - DataAdapter with different SQL's Hello, Created dataadapter select with this command "select * from emp where empid IN (123,456,789)"; Filled and sent dataset to remote client. lost original dataadapter Remote client works with the dataset and sends it back Created a new dataadapter select with this command "select * from emp where 1=2; (effectively a null set) populate the update/insert/deletes commands on the dataadapter based on the 2nd above select Called the Update method of the dataadapter. All changes get affected to the database. Question 1 : Can/should i create the dataset with one select command and at time of update create another select command based on a different sql. (i use this method as when i pass the dataset to the remote site i dont pass the parameters used to create the original sql, so at time of return i dont know/unaware of the original sql). Question 2 : Does this mean that dataadapter works in such a way that it needs only to know the end table & fields without knowing the original data associated, i.e. the dataset set has all the intellegence of old rows/newsrows contained in it. Thanks Ivan Tag: DataSet and MappingType Tag: 116489
  - 18
    - Rowfilter on child recorsd only works with Fill Hello everybody, I have a dataset containing two related tables : Master, Detail. I have used the designer to create a form with two DataGridView. I want to filter parent records so that only those which don't have child records are listed. In the Form_Load, I have created a DataView (dv) with filter : "ISNULL(Count(Child.ID),0)=0" (where ID is the primary key of Detail). I then Fill the datatables : Master, Detail. I then set the Master DataGridView's datasource property to dv. The problem that I have : When the Form is launched, the filtering is correctly done. Now, if I had a row in Master, then add a child row to Detail, the parent row in Master is still there !!! Does the rowfilter only work at Fill time ? It doesn't work with creations/deletions in Master !! Is this a known bug ? I would prefer have this solution work that the workarounds described in the article Q321896 !! Tag: DataSet and MappingType Tag: 116479
  - 19
    - Auto update data on RowChanged Hello, i want to auto update a datatable (SQLDataAdapter.Update(myDatatable) ) during RowChanged event It is possible? thanks wgn Tag: DataSet and MappingType Tag: 116478
  - 20
    - Save Table in MSSQL Hello Group, In my application I create new DataTable (name : myTable). How save this table on sql server as myTable. Thx PawelR Tag: DataSet and MappingType Tag: 116472
  - 21
    - Hierarchical data Hi I'm a VB6 developer tasked with taking a VB6 application and turning it into a .NET application. I'm just doing a bit of reading up at the moment... The VB6 application does a lot of queries returning hierarchical ADO recordsets, sometimes this goes as far as 4 chapters deep... This data is not simply bound to a display control, but the data programmatically iterated through and either the data manipulated or other tasks stared based on the values found. I'm after a quick "beginners" tutorial for handling hierarchical data and manipulating it in a VB.NET environment. Any suggestions? All help greatly appreciated. Thanks Griff Tag: DataSet and MappingType Tag: 116471
  - 22
    - MSDE help I'm looking for help getting started with MSDE. Anyone have any suggestions? Tag: DataSet and MappingType Tag: 116469
  - 23
    - BindingContaxt I am trying to insert a new record into a sql table, that has a field that is a key field. Before I can insert the record I get a message when the statement with the '***' is executed. is there a way to code around this??? MESSAGE: "System.Data.NoNullAllowedException: Colume 'taskid' does not allow nulls". I know this. What I do not understand is how the 'BindingContact' really works. Some of the code follows: CODE: DataRowView drvDetail; DataView vueDetail; public void EditDetail(CurrencyManager cm) { try { LoadData(); cbServices.DataSource = dvServices; cbServices.DisplayMember = "service-description"; cbServices.ValueMember = "service-nbr"; drvDetail = (DataRowView) cm.Current; vueDetail = drvDetail.DataView; *** this.BindingContext[vueDetail].Position = cm.Position; *** txtSON.DataBindings.Add("Text", vueDetail, "service-order-number"); txtTaskID.DataBindings.Add("Text", vueDetail, "taskid"); txtServiceDesc.DataBindings.Add("Text", vueDetail, "task-desc"); txtCompDate.DataBindings.Add("Text", vueDetail, "complete-date"); txtServiceCost.DataBindings.Add("Text", vueDetail, "task-cost"); - Norm Bohana Tag: DataSet and MappingType Tag: 116465
  - 24
    - Emergency! Too Busy A Connection! Hi. I have a problem with an OLEDBConnection object that is supposed to serve for a number of clients that need data from my Access(mdb) database. These clients are placed in different threads and try to load data from this connection. The problem is that when the connection is retrieving data for one of them, another one may ask for data. This throws an InvalidOperationException with the following message: "ExecuteReader requires an open and available connection. The connection's current state is Open, Executing." I fully understand its meaning, but what can I do to solve this issue? I tried a delaying loop, checking to see if the exception occurs again in the loop, and repeating the operation again. Although I used Application.DoEvents (you know what that does) , but a loop takes all the CPU time available, and it seems to me that the whole operation becomes very very slow and surprisingly, memory consuming! Any one got an idea? Thank you all. Tag: DataSet and MappingType Tag: 116464
  - 25
    - FUNCTION as DATASET I am trying to create a function that passes a Dataset. I know the code works because if I cut and paste it on my file in code behind it works fine. The actual task is to create the Dataset from a SQLDataAdapter within a function. Then I want to call the function to fill a dropdown list on my .aspx page. Here is the current code that I am using in the function. I am unaware of what I should be using on the .aspx page. Any and all help is appreciated. Public Function ShowRootFolders(ByVal ClientID As String) As DataSet Dim Connect As String Dim CompanyDataSet As DataSet Dim GetCompanys As SqlClient.SqlDataAdapter Connect = ConfigurationSettings.AppSettings("THE_Connection") Dim Connection As New SqlClient.SqlConnection(Connect) Connection.Open() GetCompanys = New SqlClient.SqlDataAdapter("Select * from rootfolders where clientID = '" + ClientID + "'", Connection) CompanyDataSet = New DataSet GetCompanys.Fill(CompanyDataSet, "AllTables") DMConnection.Close() Return ShowRootFolders Tag: DataSet and MappingType Tag: 116460
- Next
  - 1
    - transaction with unknown nbr of commands Using vb.net for code behind on a asp.net application. I need to run a number of sqlcommands, based on user input. The commands need to run as a single transaction. The commands are all stored procedures. How do I do this? I was thinking that I could build an array of the sqlcommands, but I do not see how to do it. I looked at arraylist, but still not sure. Maybe the question could be stated as: When I run a sqlcommand in a transaction, does the sqlcommand need to persist, or can I just reuse it to run another stored procedure within the same transaction? Tag: DataSet and MappingType Tag: 116455
  - 2
    - SQL debugging I have setup my project for SQL debugging. I get the error message Unable to start SQL Debug session. Ensure SQLDBREG2.exe and Proxy/stub dllsqldbg.dll are registred on this machine. How do I get these registered? Tag: DataSet and MappingType Tag: 116453
  - 3
    - Object reference not set to an instance of an object - Exception in System.Data.OracleClient Hello NG, We are facing sometimes the following exception ... Object reference not set to an instance of an object. ------------------------------ Stack Trace ------------------------------ at System.Data.OracleClient.DBObjectPool.GetObject(Object owningObject, Boolean& isInTransaction) at System.Data.OracleClient.OracleConnectionPoolManager.GetPooledConnection(String encryptedConnectionString, OracleConnectionString options, OracleConnection owningObject, Boolean& isInTransaction) at System.Data.OracleClient.OracleConnection.OpenInternal(OracleConnectionString parsedConnectionString, Object transact) at System.Data.OracleClient.OracleConnection.Open() at Philips.Phoenix.PhoenixAgent.StandardWebForm.Page_Load(Object sender, EventArgs e) ... when executing this code: ... DbCon = New System.Data.OracleClient.OracleConnection(ConfigurationSettings.AppSettings("OracleConnectionString")) DbCon.Open() ... The exception only occours sometimes, but as soon as it occours once it's appearing more and more, with the result that the application is no longer responding. Is this a known issue? Are there any ideas to work arround that ? Thanks and Regards MBO Tag: DataSet and MappingType Tag: 116452
  - 4
    - What is threadsafe mean ? Hi, I am newbie to multithread programming. When I read some writeup about classes, i.e. Dataset or Dataview sometimes it said it is safe for multithreaded read operations and you must synchronize any write operations. What does the above statement means ? Thank You, mfwoo Tag: DataSet and MappingType Tag: 116437
  - 5
    - How to determinate the vesion of Sql2005 The user of my asp.net program use Sql2005 or Sql2005 express as database, both are possible. I have try both version of data base, I found: If I use Sql2005 express, the Data Source in connection string will be .\SQLEXPRESS, like: Data Source=.\SQLEXPRESS;Initial Catalog=myDB;Integrated Security=True But I use Sql2005 , the Data Source in connection string can be use (local), like: Data Source(local);Initial Catalog=myDB;Integrated Security=True My questions are: 1.Is it possible use the some connection string with both version of DataBase. 2. If question 1 is impossible, how to determinate the version of Sql2005? I want to composite the connection string with program. Tag: DataSet and MappingType Tag: 116429
  - 6
    - Textbox DataBinding I don't fully understand control binding in c# programs and wonder if someone could clarify things for me. I have two related tables ... Parent: USERS (names) Child: USER_CONTACT (telephone numbers, etc) To the child table I've bound several textboxes as follows ... myTextbox.DataBindings.Add("Text", ds.USERS, "USER_USERCONTACT.FIELD_NAME"); All of this works great. My problem is updating the datasource with changes made to the textbox values. Specifically, the routines below successfully pass updates to the datasource just once. After that, in spite of making more edits, the routines don't pass changes back to the datasource. Here are the main events in the code ... BindingContext[ds.USERS, "USER_USERCONTACT.FIELD_NAME"].EndCurrentEdit(); daUSERS.Update(ds.USERS); daUSERS.Fill(ds.USERS); daUSERContact.Update(ds.USER_CONTACT); daUSERContact.Fill(ds.USER_CONTACT); Since my controls remain bound through the update and refill I assume that maybe "EndCurrentEdit()" has ended my editing session and, for additional editing, I need to somehow "begin edit." It's at this point that I realize the greater problem is my not having any idea what I'm doing! Thanks in advance for advice. Tag: DataSet and MappingType Tag: 116428
  - 7
    - Why can run with Users I use VS2005 to develop Asp.net program. If the asp.net just belong to Users group, my aps.net can't run. It's error message is : "Login failed for user 'D610\ASPNET' (D610 is my machine name) But if I add Administrators to Asp.net account, my asp.net program can run well. Why? I have found the other machines can just use asp.net with Users to run asp.net program! Tag: DataSet and MappingType Tag: 116427
  - 8
    - Backup do but Restore fail I want to backup and restore a database in asp.net. The backup process is successful and fail when restore with message: User does not have permission to RESTORE database 'Health'. RESTORE DATABASE is terminating abnormally the restore SQL is : restore database Health from disk = 'D:\Data\ASPNET\Health8\Backup\myback.bck' and the backup SQL is: backup database Health to disk='D:\Data\ASPNET\Health8\Backup\myback.bck' with init The two state are all execute in asp.net, why the backup one can do, but the restore on fail with no permission? I have also test the Restore statement in Enterprise manager, it done sucessfully. Tag: DataSet and MappingType Tag: 116415
  - 9
    - How to Store Multidimensional DataSet (.NET 1.1) Hi, I want to read a bunch of related tables into a DataSet, update some data in some of the tables and save the changes back to the database. How can this be done? Can someone please point me to a corresponding tutorial? I've been searching through MSDN but couldn't find anything appropriate. When I use the SqlDataAdapter to read more than one query, all the tables get names different from the query source table name. How is it supposed to store it's data back into the database then? And how can I have DataRelation objects automatically created from my query? (E.g.: "SELECT * FROM Order; SELECT * FROM OrderItem; SELECT * FROM Address") Thanks for enlightening me! Axel Dahmen Tag: DataSet and MappingType Tag: 116413
  - 10
    - How to select a sequence of datetime records I have a table where the records are inserted in intervals of 500ms. I need create a SP where the records are selected in the following basis: 1. One of the fields is a datetime type 2. An initial datetime is provided as an argument 3. I need read the first 400 records (for example) where the first record is the one provided as argument and the subsequent records will be the initial datetime value added in steps of 5 min. For example: if the provided argument is 08/20/2005 14:22, the I need to get 08/20/2005 14:27 08/20/2005 14:29 08/20/2005 14:34 and so on.... any ideas? Thanks. Carlos -- Senior Developer www.byteshift.com Tag: DataSet and MappingType Tag: 116407
  - 11
    - How to join two tables. i have two tables as follows: first table: Id Name Age 2 ABC 21 3 XYZ 22 second table: Id Salary Exp 2 10000 2 3 20000 5 The Id columns in both the tables being the primary keys. and wat i want is Id Name Age Salary Exp 2 ABC 21 10000 2 3 XYZ 22 20000 5 is this possible? I tried using dataset.Merge and binding dataset to the datagrid to display the final table, but with no success. any pointers to this will be greatly appreciated. Tag: DataSet and MappingType Tag: 116405
  - 12
    - ALTER USER in Oracle returns ORA-01036 error Hello. I have a VB.NET windows application using .NET Framework 1.1 and System.Data.OracleClient.dll version 1.0.5000.0, connecting to Oracle10g database. I had no problem running OracleCommand.ExecuteNonQuery() passing OracleParameters. But now, I want to add an option to allow to change the password of Oracle database users through my application. I have this simple code: Dim cmd As New OracleCommand With cmd .Connection = Conexion .CommandType = CommandType.Text .CommandText = "ALTER USER :param0 IDENTIFIED BY :param1" .Parameters.Add(New OracleParameter("param0", User)) .Parameters.Add(New OracleParameter("param1", NewPassword)) 'where User and NewPassword are string variables End With Conexion.Open() cmd.ExecuteNonQuery() But I get this error: "ORA-01036: illegal variable name/number" I have tried changing System.Data.OracleClient.dll to the 1.0.3300.0 version but I get the same error. I would appreciate any help!!! Thank you. Tag: DataSet and MappingType Tag: 116394
  - 13
    - fabricated dataset in VB.Net I want to create a fabricated dataset in VB.Net. Any help would be welcome. TIA Chris Tag: DataSet and MappingType Tag: 116389
  - 14
    - Empty SQLDataReader when using SQLCommand parameters We are having issues getting data from our sql database using a stored proc w/ parameters. the dr.HasRows is always false. the sp returns data with the same parm in query analyzer. this also returns data when we use cmdtype = text and hard code the sp in the cmdtext. it also returns data with an sp that has no parameters. thanks in advance for you help. Here is the code: private void button1_Click(object sender, System.EventArgs e) { SqlConnection conn = new SqlConnection("Persist Security Info=False;User ID=sa;Initial Catalog=ace;Data Source=devsql"); SqlCommand cmd = new SqlCommand("userget", conn); cmd.CommandType = CommandType.StoredProcedure; SqlParameter parm = cmd.Parameters.Add("@Username",System.Data.SqlDbType.VarChar,128,"username"); parm.Direction = System.Data.ParameterDirection.Input; parm.Value = "[some username in the database]"; conn.Open(); SqlDataReader dr = cmd.ExecuteReader(); if (dr.HasRows) { while (dr.Read()) { Console.WriteLine("Has Rows"); } } } Tag: DataSet and MappingType Tag: 116388
  - 15
    - Speed issues with ADO.Net I've converted an old VB3 program that loops through the lines of a text file, then uses that info to write to a database. I use mostly OLEDB DataAdapters, DataSets, and DataTables and Rows to insert/update the database. The problem is, this is extremely slow (with one extremely large file, the old program completed in 9 minutes, while the new program took 1 hour 9 minutes!). I'm considering replacing the use of dataadapters etc. with just SQL commands using an OLEDBCommand. Is this the best alternative to increase speed? This is an extremely large, old program that calls different subroutines based on the line read from the text file. Basically, in each sub, I'm creating new DataAdapter, DataSet, and DataTable and Row objects, and using them. Tag: DataSet and MappingType Tag: 116380
  - 16
    - Unchecked checkbox windows form Hi: I'm sure this question has been asked before but I can't find the answer. I have a windows form with a checkbox. It's bound to a BIT field in sql server. I let the wizard create the dataadapter and the stored procs in the database. If the box is unchecked when I insert a new record, it leaves the field in the database NULL which throws an error when I try to load the record. How can I pass False or 0 to the stored proc? Is there a setting somewhere? To tell the truth, I have a lot of checkboxes so I was hope I could change a setting instead of hand code all the bidings for it. I set the default value in the table to (0) but still shows NULL or grey box in the table when my form inserts Thanks RK Tag: DataSet and MappingType Tag: 116371
  - 17
    - how do I remove extra data from serialize XML string of a DataSet Hi All, I want to serialize an object which contain the DataTable. As DataSet is MarshalByRef object and is serializable. I am using it directly. Even my data is also serialize and save it to XML file. Now as DataSet serialize, it's creating some extra information schema information), And i don't need that. I only want to store the data in XML format. I don't want to store extra details like namespace etc... As it's increase XML file size. Inshort, I want XML string of a DdataSet excluding other data like type, namespace etc.... One thing is clear that this DataSet is a part of my object. So I can't use DataSet.GetXML() function. Thanks Rushi Tag: DataSet and MappingType Tag: 116369
  - 18
    - how do I remove extra data from serialize XML string of a DataSet Hi All, I want to serialize an object which contain the DataTable. As DataSet is MarshalByRef object and is serializable. I am using it directly. Even my data is also serialize and save it to XML file. Now as DataSet serialize, it's creating some extra information schema information), And i don't need that. I only want to store the data in XML format. I don't want to store extra details like namespace etc... As it's increase XML file size. Inshort, I want XML string of a DdataSet excluding other data like type, namespace etc.... One thing is clear that this DataSet is a part of my object. So I can't use DataSet.GetXML() function. Thanks Rushi Tag: DataSet and MappingType Tag: 116368
  - 19
    - how to read data from EXcel and save to DataSet ,then save the DataSet to the SqlServer ? I have done that read from Excel and save to dataset , but how to save the dataset to sqlserver ? any document ? Tag: DataSet and MappingType Tag: 116366
  - 20
    - C#-Oracle Ref Cursor? Hi, I am using Oracle9i and developing a program with C#. I use ADO.net (System.Data.OracleClient) to connect to db. I get the data by using ref cursors. But i have a problem about maximum number of opened cursors. I cannot close the ref opened cursor explicitly by C#. ADO.net does not close the cursor by disposing all database objects such as OracleCommand,Connection... So, i get an error message when i exceed the maximum number of opened cursors. It is set to 1000. So is is it possible to close opened ref cursors by C#.Thanks... Tag: DataSet and MappingType Tag: 116365
  - 21
    - Null value and storedproc parameter I add a patrameter using the following: MyParam.Value = IIf(MyIntData = 0, vbNull, MyIntData) So if MyData = 0 then replace it with a null, thing is when the storeproc executes I get a FOREIGN KEY constraint error, which suggests that a zero is being passed and not a null (yes the column allows null values). Am I missing something obvious ? Thanks ! Séan Tag: DataSet and MappingType Tag: 116364
  - 22
    - How to know the file name of a database I want to copy the .mdf and .ldf of a database when the database is detatch. How can I get physical file name a database? Tag: DataSet and MappingType Tag: 116359
  - 23
    - How can I restore a database when the database is deleted? I use backup database pubs to disk='c:\pubbackup.bak' to backup pubs database. Then I detach pubs, and delete pubs.mdf and pubs.lof After delete the files, I use restore database pubs from disk='c:\pubbackup.bak' to restore database form backup file, but it fail with message: "Can't find pubs database" How can I restore a database when the database is deleted? Tag: DataSet and MappingType Tag: 116357
  - 24
    - What happened to Eval, Execute and ExecuteGlobal I have been trying to get find where the simple Eval function that was such a great little function in asp has gone. There does not appear to be any replacement. Is this possible?? I was using this in a number areas in my asp app and when I have gone to upgrade I can't seem to find any similiar functionaility - There must be something out there? I noticed that datalist has an Eval - is this similiar - it appears to evaulate things at run-time - could this be used as a replacement. I can't believe that it is impossible - you are meant to be able to create web controls - and if I am correct that the datalist has an eval, than it should be possible to buid Eval functionality into any control - just can't find anything on this one. Any help would be great. -- matthew Tag: DataSet and MappingType Tag: 116355
  - 25
    - thanks everyone Thanks everyone who has helped me the last few weeks getting my most complicated input screen done. Now I only have 4 or 5 more to do, but they should not be as hard since everything I didn't know, I think I learned on the main screen from people in here. -- Patrick Sullivan, AA-BA, BA-IT Tag: DataSet and MappingType Tag: 116350

Hi there,

I've a problem with a DataSet in framework 2.0. In VS2003 I create a schema
from my DataSet. For one attribute I used my own type. In VS2003 this works
fine and I am able to load all corresponding xml-files.

When I try to create the same DataSet in framework 2.0 I always get the
error "Datatype myowntype should be mapped to MappingType.Element".

Does anybody know what to do, to map a custom type to attribute? I dont't
want to convert all corresponding xml-files.

Thanks.

Betina

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