OracleParameter.IsNullable

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  - 1
    - Cannot perform '>=' operation on System.DateTime and System.String I have noticed this problem coming up in newsgroups before I have a slightly different variation on it. I have a dataview (dv) that I am filtering: e.g. strFilter = "EndDateTime >= '" + txtEndDateFrom.Text + "')"; dv.RowFilter = strFilter Now, on my computer and one one of my servers this works fine and the filter filters as requested. However, on our production server, I get the message "Cannot perform '>=' operation on System.DateTime". I've tried many things including having the filter being strFilter = "EndDateTime >= " + Convert.ToDateTime(txtEndDateFrom.Text).ToShortDateString()) + "')"; strFilter = "EndDateTime >= #" + txtEndDateFrom.Text + "#)"; strFilter = "EndDateTime >= #" + Convert.ToDateTime(txtEndDateFrom.Text) + "#)"; strFilter = "EndDateTime >= '#" + Convert.ToDateTime(txtEndDateFrom.Text) + "#')"; For the ones above I tend to get String not recognised as valid datetime. So, I've got 2 servers that'll happily run this code and the production one doesn't. The only obvious difference in these servers is although the production server has the .Net framework installed (same version as the other 2), the production server doesn't have Visual Studio .Net installed on it. I really can't see why this would matter and would rather take the task of installing VS.Net on the server as a last thing to try. So, anyone out there got any suggestions as to why the code runs differently? Thanks, Ieuan Roberts Tag: OracleParameter.IsNullable Tag: 96343
  - 2
    - AcceptChanges and IndexOutOfRangeException When using an accept changes on a specific dataset I get an IndexOutOfRangeException (on a column) I added one column and removed some. if i don't remove column on a specific table it works any one got an idea? (i have no constraint on this table) thanks Tag: OracleParameter.IsNullable Tag: 96340
  - 3
    - Get the users's permisions for each table Hi, I have a protected Access Database (with different tables) and an user with different permisions for every table. How can I get the user's permisions for every table? Daniel Tag: OracleParameter.IsNullable Tag: 96339
  - 4
    - Occasional error opening a connection I'm using VS.Net 2003 and C# to write an app that connects to an Oracle 9i database. I have a button on a form that takes username/password/service name information, creates a connection string and issues an open command. From time-to-time, I get an error "ora-12154 tns:could not resolve service name". The problem is that it doesn't happen all the time. Any idea's about what may be going on? Here's my code: //Create a string builder to put together the connection string from the user input // Provider=MSDAORA.1;UserID=xx;Password=xx;Data Source=dev9 StringBuilder sb = new StringBuilder(); sb.Append("Provider=MSDAORA.1;User ID="); sb.Append(txtUserName.Text); sb.Append(";Password="); sb.Append(txtPassword.Text); sb.Append(";Data Source="); sb.Append(txtDatabase.Text); try { //Create connection object using the connection string connString = sb.ToString(); oConnection1 = new OleDbConnection(connString); oConnection1.Open(); <==== this line sometimes generates an error //check to make sure the connection was opened if (oConnection1.State == ConnectionState.Open) { //write a status to the display rtbConnect.AppendText("Opened connection \n"); rtbConnect.Refresh(); ... I'm really perplexed why the open command generates an error from time-to-time. The connection string seems to be correct. I can paste it into a test.udl file and it always works. dev9 is declared in my tnsnames.ora file and I have no problems creating ODBC connections using it. Tag: OracleParameter.IsNullable Tag: 96334
  - 5
    - SQL Server 7 and ADO.NET I am starting a .NET project and am wondering if anyone has experience with using ADO.NET to access a SQL Server 7/NT server. If so, were there any issues? Tag: OracleParameter.IsNullable Tag: 96333
  - 6
    - BeginLoadData EndLoadData LoadDataRow, Events still fire I am trying to figure out how to get the events for a table to NOT fire. Please take a look at the example code below. No matter how I do it the event still fire. What am I doing wrong? Please someone respond, this is killing an arch. design in a application I am working on. DataSet ds = new DataSet(); //FIRST TRY ds.Tables.Add(new DataTable()); ds.Tables[0].RowChanged +=new DataRowChangeEventHandler(Form1_RowChanged); ds.Tables[0].BeginLoadData(); DataRow dr = ds.Tables[0].NewRow(); ds.Tables[0].Rows.Add(dr); ds.AcceptChanges(); ds.Tables[0].EndLoadData(); ds.Clear(); //CLEAR //START SECOND TRY ds.Tables[0].Clear(); ds.Tables[0].BeginLoadData(); dr = ds.Tables[0].NewRow(); ds.Tables[0].LoadDataRow(dr.ItemArray,true); ds.Tables[0].EndLoadData(); Tag: OracleParameter.IsNullable Tag: 96328
  - 7
    - Developing using ce Hi I am new to sql server ce and am trying to get my head round how to develop using sql ce as opposed to sql server 2000. I want to develop for hand held devices using windows mobile. The vs.net 2003 ibuyspy compact framework sample runs fine on the handheld when compiled and run. My problem is how to setup a vb.net project which uses sql server ce as backend and how to move/install to handheld when needed. Thanks Regards Tag: OracleParameter.IsNullable Tag: 96325
  - 8
    - ExecuteNonQuery() says I have bad SQL Here is the SQL statement that I'm trying to execute INSERT INTO Tbl_NameCharacter(Character, Code) VALUES('Rebel Generic', 'Rbl') My database has a table name 'Tbl_NameCharacter' it has 3 fields, the PK is an autonumber 'CharacterID' the second is a 'text' field named 'Character' and the third is also a 'text' field named 'Code' I don't get it. Here are the details from the OleDbException System.Object {System.Data.OleDb.OleDbError} System.Object Message "Syntax error in INSERT INTO statement." string message "Syntax error in INSERT INTO statement." string NativeError -529993134 int nativeError -529993134 int Source "Microsoft JET Database Engine" string source "Microsoft JET Database Engine" string SQLState "3000" string sqlState "3000" string Any ideas? Tag: OracleParameter.IsNullable Tag: 96314
  - 9
    - newbie ~ View or Stored Procedure sql server / ado.net / vb.net What is the better approach to populating a subset of table data to a datagrid or form of controls - a view or a stored procedure? Tag: OracleParameter.IsNullable Tag: 96313
  - 10
    - Dataview column values I need to obtain an mean value of Width column in a Dataview. I can walk through the Dataview (see below). How do I extract the values from Width column in the Dataview so they can be added together? Would it be better to use a datatable? If so same question. Dim dt As DataTable = ds.Tables("tblWidths") Dim dvWidths As New DataView(dt) dvWidths.RowFilter = "FishSurveyID = " + Me.FishSurveyIDWidths.Text + "" Dim x As Integer = 0 For Each drv2 As System.Data.DataRowView In dvWidths x += 1 Next Tag: OracleParameter.IsNullable Tag: 96312
  - 11
    - Reloading DataSet Hi, What's the best way to reload a DataSet? I have a DataSet object with multiple tables in it, I would like to refresh a table(reloading the data from sql server) in this dataset when a user click a refresh button. Thanks for your help. david Tag: OracleParameter.IsNullable Tag: 96310
  - 12
    - webservice deployment problem I have a webservice built and tested on my dev machine (with .net sudio, xp). Everything seems working fine for me in this environment. Then I tried to deploy it (I tried manual copy and setup project) to another server (win2k server with IIS and .net frmwk 1.1 but w/o .net studio). Of course I did not forget to create the application in IIS Manager. The service is world accessible. I can browse it by url http://myserver/myws/myws.asmx I can see the page listing all its service methods in myws. So far so good. But problems come out. I click on one of methods, put a parameter and click 'invoke'. A request is posted to http://myserver/myws/myws.asmx/mymethod But the reponse is "Page cannot be displayed". I also tried http://myserver/myws/myws.asmx/mymethod?param=1 which gets me same error. I also tried to access the web service from a asp.net client. I got an exception (see P.S.). All the stuff I tried above works on my dev box. I am wondering what is wrong. Please offer your thoughts and expertise. Thanks! -Jerry [SoapException: Server was unable to process request. --> Object reference not set to an instance of an object.] System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) .... Tag: OracleParameter.IsNullable Tag: 96308
  - 13
    - Raw Excel Export? I have a DataSet with 3 named DataTables. What is the fastest way to create a new workbook and spit each DataTable to a new worksheet? Thanks. Tag: OracleParameter.IsNullable Tag: 96295
  - 14
    - Newbie help with Datasets Hello, I am new to this and i am experimenting with Datasets and ADO.NET. I am trying to go smooth so for now so I created all my Adapters and Datasets etc. visually. However when i simply delete one of them from the visual panel, under my form, and then i create another one with a different name, I see that the create-Dataset-wizard list contains as options datasets that were there before but (are supposed to) have been deleted !!!??? Very weird ! Is it a VS 2003 bug? Do I have to go to the VB-generated code and delete them internally? I think this is probably dangerous.... Also, a dataset is a snapshot of a table(s) which does not contain relationship information from the database (?), but the user has to create it explicitly with myDataSet.Relations.Add. If this is true and i want to Bind (and synchronize) a whole bunch of controls, do i HAVE to recreate the relationships explicitly? Then what is the point of accesing a relational database? Thanx for any feedback in advance! -steve Tag: OracleParameter.IsNullable Tag: 96294
  - 15
    - system.exception can't open Oracle 10g connection Hi, I am a total loss. I have VS 2002, Microsoft Oracle data provider and Oracle 10g client installed. I am trying to open a connection but keep getting a system.exception error. System.Data.OracleClient requires Oracle client software version 8.1.7 or greater. I have Oracle 10g installed! I can't open a connection. It's very frustrating because i have uninstalled, reinstalled the Oracle client and Microsoft Oracle data provider. If anyone has any ideas or help that would be great. Thanks, a very frustrated developer. Tag: OracleParameter.IsNullable Tag: 96290
  - 16
    - OleDbConnection does not release Access database I have seen a few threads mentioning this problem, but none of them have offered a solution that works for me. I have an application that creates an OleDbConnection to a Microsoft Access 2003 database. When the application is done with the connection, I call the Close() method on the connection to free up the database resource. After reading other threads, I even added "OLE DB Services=-4;" to my connection string to prevent connection pooling, although I gather that it should have no effect on a local MDB data source. In any case, the application then attempts to move the database file (in preparation for a JDO.CompactDatabase call, which seems to be necessary for some reason), and I get an error because the database file is supposedly still in use. I tried adding calls to OleDbConnection.Dispose() and GC.Collect() in desperation, but nothing seems to work. Here's the offending code: dbConn = new OleDbConnection(); dbConn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;OLE DB Services=-4;Data Source=" + dbPath; dbConn.Open(); // // Use the connection here... // // Disconnect from the database dbConn.Close(); Debug.Assert(dbConn.State == ConnectionState.Closed); dbConn.Dispose(); dbConn = null; GC.Collect(); // Prepare to repair the database (due to occasional complex join problems) File.Move(dbPath, "c:\\temp_location.mdb"); <---- ***** Error occurs here ***** Oddly enough, the error indicates that the target file for the move cannot be accessed: The process cannot access the file "c:\temp_location.mdb" because it is being used by another process. I can see that an LDB file is created when I call dbConn.Open, but it does not disappear until the application is closed, no matter what I do to that dbConn object. Does anyone have any suggestions? Thanks, Jon Tag: OracleParameter.IsNullable Tag: 96289
  - 17
    - Weird problem in dataset - Bug? Hi all, Visual Studio Enterprise 2003 and DotNet Framework 1.1. I have a strongly typed dataset (generated by the Schema Designer). This dataset has a table called Category and one of the columns in this table is called "ParentCategoryId". There are no explicit relationship set between this column and any other column. Here are some non-contiguous lines of code: MainDS.CategoriesRow r = ds.Categories.NewCategoriesRow(); //create a detached row r.ParentCategoryId = -1; // set the ParentCategoryId....this is the problem column r.CreatedBy = -1; // set the CreatedBy.....this column is perfectly OK. ds.Categories.AddCategoriesRow(r); // Add the row to the table. The problem is when the AddCategoriesRow(r) method is executed, the the value in ParentCateogyId immediately changes to 1 instead of -1. This only happens if the value in this column happens to be equal to or less than zero. Any value < 0 is changed to 1. As long as the value is > 0, everything works as expected. The "CreatedBy" column is identical in characteristics to "ParentCategoryId" column. The above problem does not occur in CreatedBy column. Whatever value I assign to CreatedBy stays put. But not in ParentCategoyId column. I have tried every trick in the book to no avail. I even deleted the table from the schema and re-added the same to force a recompile of the XSD file. The only conclusion I can come to is that there must be some bug in the framework or the column name ParentCategoryId is used internally in ADO.NET which is causing some name conflict or something. Has anybody ever seen this problem before? Any help is highly appreciated. Babu. Tag: OracleParameter.IsNullable Tag: 96285
  - 18
    - Adding AutoIncrement column to table does not increment After retrieving a table from SQL. I wanted to add a column to the table with a record id. After retrieving the data and then I add the column and set the following properties: dt.Columns.Add("NewColumn", GetType(Int32)) dt.Columns("NewColumn").AutoIncrement = True dt.Columns("NewColumn").AutoIncrementSeed = 0 dt.Columns("NewColumn").AutoIncrementStep = 1 Nothing happens. I looked through the records for this column and there is nothing there. I am using ADO.NET 1.0 and Visual Studio.NET 2002... I have seen examples for this and I am wondering if its not supported with the earlier version of ADO.NET. Or I am doing something wrong. Thanks. Tag: OracleParameter.IsNullable Tag: 96284
  - 19
    - Update Dataset with Access Hi, I used OleDb.OleDbDataAdapter to retrive and modify the access i used merge function to combin another dataset, then update Access DB but i can't update the database by using pDataAdapter.Update(ds_data) the result is always 0 Here is my code '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' '' pDataAdapter.SelectCommand = New OleDb.OleDbCommand(Sql, mConn) pDataAdapter.Fill(ds_data) Dim Key1() As DataColumn = {ds_data.Tables(0).Columns("item"), ds_data.Tables(0).Columns("desc")} ds_data.Tables(0).PrimaryKey = Key1 ds_data.AcceptChanges() ds_data.Merge(datainfo, True, MissingSchemaAction.AddWithKey) pDataAdapter.Update(ds_data) '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' ''''''''' I am not sure what is problem, any suusgestion for updating Access with dataset ??? Thanks Percy Tag: OracleParameter.IsNullable Tag: 96282
  - 20
    - DataRelation CaseSensitive String Field I'm creating a DataRelation between two datatables of a single dataset. One of my relationship columns is a string field and I notice that the DataRelation is case sensitive. Therefore, If my parent table contains a record in with a value of 'name' only records in my child table with the value of 'name' will be included in the DataRelation. If the child table has a record with a value of 'Name' this will not be seen or included in the relationship. Is there any way to turn off case sensitivity in the Data Relation? I've gone through and set the CaseSensitive property of the dataset and all it's individual datatables to false before i apply the data relation and that doesn't seem to work. Any help is appreciated. Thanks, -Rick Tag: OracleParameter.IsNullable Tag: 96281
  - 21
    - DataBinding to a DataView -- only getting first row This is a multi-part message in MIME format. ------=_NextPart_000_0014_01C4A609.EE559880 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi all, I'm creating my first "real" Windows Forms application. I'm having some = difficulty binding a DataView to my custom control. I can do it just = fine if I bind directly to the DataTable, and it behaves as I want. = (Multiple controls on the screen, each one bound to a different row in = the database.) Essentially, I'm making a datagrid-like interface, but = using textboxes, etc. This code works (code simplified) For iRow =3D 0 To 2 dlg =3D new DataLine.Generic ... Dim cm As CurrencyManager =3D = CType(dlg.BindingContext(TCE.db.TheDataset.Personnel), CurrencyManager) cm.Position =3D iRow Next It works great -- each DataLine (my custom control) is bound to a = different row in the Personnel table. However, when I try to change it to use a dataview instead, which is = pointing at the Personnel table, each data line comes out exactly the = same -- they are all bound to the first row. The view is being filtered = correctly, because when I check the number of rows in the DataView, it = is the smaller number that I am expecting. dv.Table =3D TCE.db.TheDataset.Personnel dv.RowFilter =3D "SubTabID =3D 1" For iRow =3D 0 To 2 dlg =3D new DataLine.Generic ... Dim cm As CurrencyManager =3D = CType(dlg.BindingContext(dv), CurrencyManager) cm.Position =3D iRow Next Any ideas? Does the Currency Manager not support a Position when = connected to a dataview?? Thanks, Beverley ------=_NextPart_000_0014_01C4A609.EE559880 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 6.00.2800.1400" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>Hi all,</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I'm creating my first "real" Windows = Forms=20 application.  I'm having some difficulty binding a DataView = to my=20 custom control</FONT><FONT face=3DArial size=3D2>.  I can do it = just fine if I=20 bind directly to the DataTable, and it behaves as I want.  = (Multiple=20 controls on the screen, each one bound to a different row in the=20 database.)  Essentially, I'm making a datagrid-like interface, but = using=20 textboxes, etc.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>This code works (code = simplified)</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>        =  For=20 iRow =3D 0 To=20 2<BR>           &n= bsp;       =20 dlg =3D new=20 DataLine.Generic<BR>        &nbsp= ;          =20 ...<BR>           =         =20 Dim cm As CurrencyManager =3D CType(dlg.BindingContext(<FONT=20 color=3D#ff0000>TCE.db.TheDataset.Personnel</FONT>),=20 CurrencyManager)<BR>        &nbsp= ;          =20 cm.Position =3D=20 iRow<BR>         Next</FONT>= </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>It works great -- each DataLine (my = custom control)=20 is bound to a different row in the Personnel table.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>However, when I try to change it to use = a dataview=20 instead, which is pointing at the Personnel table, each data line comes = out=20 exactly the same -- they are all bound to the first row.  The view = is being=20 filtered correctly, because when I check the number of rows in the = DataView, it=20 is the smaller number that I am expecting.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial color=3D#ff0000 size=3D2><FONT=20 color=3D#000000>        </FONT>&n= bsp;dv.Table=20 =3D TCE.db.TheDataset.Personnel<BR><FONT=20 color=3D#000000>        </FONT>&n= bsp;dv.RowFilter=20 =3D "SubTabID =3D 1"</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT><BR><FONT face=3DArial=20 size=3D2>         For iRow = =3D 0 To=20 2<BR>           &n= bsp;       =20 dlg =3D new=20 DataLine.Generic<BR>        &nbsp= ;          =20 ...<BR>           =         =20 Dim cm As CurrencyManager =3D CType(dlg.BindingContext(<FONT=20 color=3D#ff0000>dv</FONT>),=20 CurrencyManager)<BR>        &nbsp= ;          =20 cm.Position =3D=20 iRow<BR>         Next</FONT>= </DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Any ideas?  Does the Currency = Manager not=20 support a Position when connected to a dataview??</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>  = Beverley</FONT></DIV></BODY></HTML> ------=_NextPart_000_0014_01C4A609.EE559880-- Tag: OracleParameter.IsNullable Tag: 96280
  - 22
    - Retrieving Oracle Procedures ResultSet I'm trying to use fill a table using DataAdapter::Fill with a Oracle procedure or function result. When I call a SP (with a simple select query) from SQLServer I don't put return value on the Command's Parameters. There's any way to do the same with Oracle database, but without passing the Cursor Output datatype. Thanks in advance, JosÃ© Tavares Tag: OracleParameter.IsNullable Tag: 96279
  - 23
    - Querying a DataTable Hi, I have the following method, which sends an array of integers to another method. The array is obtained as follows: 1. Select rows from a datatable where boolColumn has been checked in a datagrid. Dim dRows() As dataRow = myDataTable.Select("boolColumn = True", "", DataViewRowState.ModifiedCurrent) 2. Initialize array and set capacity Dim arrayMyInts(dRows.Length) As Integer 3. Populate array by looping through the array of datarows returned by .Select method. For n As Integer = 0 To dRows.Length - 1 arrayMyInts(n) = dRows(n).myDataTableIntColumn1 Next n The datatable has a key that consists of two integer columns, myDataTableIntColumn1 and myDataTableIntColumn2. Therefore, the potential exists that the array I populate in step 3 (arrayMyInts) is going to have some duplicated values in it, as it could be that two or more datarows that are returned by my Select methods criteria will have identical myDataTableColumn1 values. My question: How do I get at only the UNIQUE myDataTableColumn1 values? Can this be done by refining my Select method? Could I query the array to return only unique values? Any suggestions would be great. Thanks. John Tag: OracleParameter.IsNullable Tag: 96272
  - 24
    - Editing still possible when AllowEdit = False I'm using a bound control, a textbox bound to a column in a dataview. Despite setting the AllowEdit property to False, changes in the text in the textbox are saved to the dataview and underlying dataset. When using the update command of the dataadapter these changes are saved to the database. When editing a value in code AllowEdit has to be set to True. So AllowEdit seems not to work for bound controls, Is this true or am I missing something. I find it rather strange that when AllowEdit = False you can still edit values in the dataview table Thanks Erik Tag: OracleParameter.IsNullable Tag: 96271
  - 25
    - DataColumn Expression returns rows on XP, but not Win2K? I'm at a complete loss on this problem. I'm using a DataColumn = Expression with the DataTable Select method to return rows matching a = data. Rows are returned on my Windows XP Professional computer at home, = but no rows are found on the client's Windows 2000 computers. I have checked the regional settings' date format on both machines, and = they are identical. The expression used in both locations are = identical, and the data used in both locations are identical. Here is the code: 01: string expr =3D "FileName LIKE '" + pattern + "*'"; 02: string latestFileDate; 03: latestFileDate =3D dtFiles.Compute("MAX(LastModified)", = expr).ToString(); 04: expr =3D expr + " AND LastModified =3D #" + latestFileDate + "#"; 05: DataRow[] foundRows =3D dtFiles.Select(expr); 06: string latestFile =3D foundRows[0]["FullPath"].ToString(); DataTable dtFiles contains a list of files with information in four = columns; FileName, FileSize, LastModified, and FullFilename (includes = path). Let's say the files are all files with the ".log" extension. = Let's say string pattern equals "KB". String expr is first used on line 03 to obtain the last date and time = any log file beginning with "KB" was modified. On line 04, I append the computed date and time onto String expr as an = additional filter on the LastModified column. Line 05 ALWAYS returns one row at home, on Windows XP, but no rows are = returned on the client's Windows 2000 computers. String expr is = identical on Line 04, on both computers. Any help is greatly appreciated. - carl Tag: OracleParameter.IsNullable Tag: 96268
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  - 1
    - Cannot change ReadOnly property for the expression column Hello All. I am using a strongly typed data set in a C# application. Some of the tables contain columns that are computed values by means of the Expression attribute in the data schema. I get the above exception on an update via the data adapter. I have seen some references to this problem as a known bug with work arounds but none seem to work (I have tried erasing the expression, doing update then re-adding expression and also deleting the column doing update and re-adding it to the table after execution with little success). Please note that some columns are referenced via Parent() expressions in child tables. My question is this, Is there a recommended work around for this issue (if it is indeed an issue)? Thanking you all in advance Aido. (Extremely disillusioned .NET hacker). Tag: OracleParameter.IsNullable Tag: 96260
  - 2
    - Connet to SQL Server? I am a newbie to both .Net and Sql Server and I am trying to access the database by using the ADO.Net data reader. This is actually one of the execises in a book that I am reading. However, when I run this program, there is an error saying that "Login failed for user 'sa'. Reason: Not associated with a trusted SQL Server connection." Are there some settings I have to change in the Sql Server? Please help me! //-------------------------------------------------------------- using System; using System.Data; using System.Data.SqlClient; class MyApp { static void Main() { try{ SqlConnection conn = new SqlConnection("server=localhost;uid=sa;pwd=;database=pubs"); conn.Open(); SqlCommand comm = new SqlCommand("select * from titles", conn); SqlDataReader reader = comm.ExecuteReader(); while(reader.Read()) Console.WriteLine(reader.GetString(1)); conn.Close(); } catch(Exception e){ Console.WriteLine(e.Message); } } } //-------------------------------------------------------------- Tag: OracleParameter.IsNullable Tag: 96258
  - 3
    - Connection pool in WinForms app using Data Access Block is exhausting I have an application that is using Microsoft's Data Access Application Block in a WinForms Client/Server configuration. Recently, we have been having problems where an application is timing out and throwing an error stating that the connection pool is exhausted, requiring a restart of the application. Is there a bug in the Application Block? Tag: OracleParameter.IsNullable Tag: 96257
  - 4
    - DBConcurrencyException i recently encount a strange problem. first , i successfully insert a record to db, but when i try to update this record, i always get a DBConcurrencyException exception. but when i change "using System.Data.OracleClient" to "using Oracle.DataAccess.Client", everything is OK. To make things worse, i have encount the same problem before when i update another table, at that time, i fixed it by change "using Oracle.DataAccess.Client" to "using System.Data.OracleClient", the code is as the follow: using System.Data; using System.Data.OracleClient; //using Oracle.DataAccess.Client; private void button1_Click(object sender, System.EventArgs e) { OracleConnection conn = null; try { conn = new OracleConnection("User Id=news;Password=news;Data Source=NEWS"); conn.Open(); String sql ="select * from action_rule where action_rule_id = 10000126 and branch = 2"; OracleDataAdapter adapter = new OracleDataAdapter(sql, conn); OracleCommandBuilder builder = new OracleCommandBuilder(adapter); DataTable table = new DataTable(); adapter.Fill(table); DataRow row = table.Rows[0]; row["expire_time"] = 70; adapter.Update(table); Console.WriteLine("OK"); } catch(Exception ex) { Console.WriteLine(ex.ToString()); } finally { conn.Close(); } } besides, the follow code can work private void button1_Click(object sender, System.EventArgs e) { OracleConnection conn = null; try { conn = new OracleConnection("User Id=news;Password=news;Data Source=NEWS"); conn.Open(); OracleCommand cmd = new OracleCommand(); cmd.Connection = conn; cmd.CommandText = "update action_rule set expire_time = 50 where action_rule_id = 10000066"; cmd.ExecuteNonQuery(); Console.WriteLine("OK"); } catch(Exception ex) { Console.WriteLine(ex.ToString()); } finally { conn.Close(); } } i have been tired at this problem for many days, anyone knows the reason? thanks advance. Tag: OracleParameter.IsNullable Tag: 96249
  - 5
    - Bulk updating records/rows whilst STILL in DataSet? Hi there, Just curious if you can issue a bulk update command on records in a DataSet table, i.e. Update fields in a certain DataTable with criteria that picks the Rows, and Delete Rows from a DataTable with criteria? Currently, I'm looping around the Rows in the DataSet's DataTable and updating/deleting from there - which seems awfully cack. Also, I want this processing to remain in the DataSet - I know I could update the database with the DataSet and then call the run the SQL there, but I don't want to as I'm halfway through my processing at that point. Kind regards, Mike Kingscott Tag: OracleParameter.IsNullable Tag: 96245
  - 6
    - Add user and set permisions for each table Hi, I connected to a protected Access Database using an user and password. How can I add a new user and how can I set his permissions for each table from Database. From Access this is very simple. Tools->Security->User and Group permisions... Thanks, Daniel Tag: OracleParameter.IsNullable Tag: 96244
  - 7
    - OleDbDataReader I'm currently using .NET version 2003. I want to be able to retrieve records. How do I do so using the OleDbDataReader? I want to be able to retrieve records using a selected choice from the combo box. Only when the user has made the selection does the form display the relevant details to that selection. Can I have some codes as an example? Tag: OracleParameter.IsNullable Tag: 96243
  - 8
    - ConnectionString for password protected Access Database Hi all, Can anybody kindly tell me the connection string for password protected access 2002 database.. I am using the following one but getting error dim CN as new OLEDB.oledbConnection cn.connectionstring = "Provider = Microsoft.JET.OLEDB.4.0; Data Source = \\server\Costing\costing_2004_05.mdb; user id = admin; pwd= abc " cn.open this gives the following error "could not find installable ISAM" Thanks in advance Ansari Tag: OracleParameter.IsNullable Tag: 96241
  - 9
    - Datagrid Child rows I have a dataset that contains 5 tables. One parent and 4 child tables. When I bind a datagrid to the parent table, the "+" expand is visible. I then click the "+" sign and the names of the child tables are there. But, I can only see the first two, and the Horizontal scroll bar does not allow me to scroll and see the rest. The datagrid property "HorizScrollBar" does not appear to be available at design time to modify the minimum and maximum properties. Does anyone know how to get this to work? Tag: OracleParameter.IsNullable Tag: 96237
  - 10
    - RowState changes to Modified if a DataRow is viewed via a DataGrid Hi, I have a DataTable that is bound via a DataView to a DataGrid. Every time I click on a row on the DataGrid, the underlying DataRow's RowState property gets changed to Modified. Is this the expected behavior? Is there a way around this? I checked these rows field by field and there is no difference. Read further, it gets even more bizarre. Then I do a GetChanges which gives me the same rows marked as modified as expected. I update my database with the resulting DataSet, and everything is good (nothing gets changed since there are really no changes). Then I try to merge this DataSet with the original big one and I get a constraint violation. There are no constraints on my DataSet that do not exist on my database. And the database was happy, so why is the merge failing. Please note that I am using int identity fields for PKs, but I am not even adding a row, nor really modifying anything! Thanks, Nima Tag: OracleParameter.IsNullable Tag: 96236
  - 11
    - Syncing with remote db Hi We have an access db running on a windows 2003 server. The server is connected to the internet via ADSL. I would like a windows mobile 2003 based vb.net app to sync data from the server, ideally via gprs, from time to time, the pda and the server have the same info. What is a good way to go about doing the data sync between the pda and the server? Do we have to upsize the server access db to sql server before it can sync with pda sql server ce, or can we keep the access app as it is? Thanks Regards Tag: OracleParameter.IsNullable Tag: 96233
  - 12
    - How to create a DataView by a specified row(s)? How to create a DataView by a specified row or rows? That is to say, when a row( or rows) are specified, is it possible to create a DataView which just includes this row (rows)? If not possible, is it possible to create a DataView, which only includes the parent row, by a specified row and the parent relation name? As you know, in ADO.net, there is DataRowView method as the following: public DataView CreateChildView(DataRelation); Due to I have to bind a DataView to a DataGrid, so I have to solve this problem. Please help me. Thank you in advance. Ying LI Tag: OracleParameter.IsNullable Tag: 96232
  - 13
    - Oracle Stored Procs with Parameters We are connecting to an Oracle 8.1.7 database using System.Data.OracleClient. Executing SELECT statements is easy. Modifying data is a cinch. Calling Stored Procedures was no problem until I tried to call a stored procedure with parameters. Calling a stored procedure with parameters generates the error: {ORA-06550: line 1, column 7: PLS-00306: wrong number or types of arguments in call to 'SP_CUSTREV_BY_INDVD' ORA-06550: line 1, column 7: PL/SQL: Statement ignored}. In an attempt to fix the problem, I have been through the posts at many newsgroups including this one, but to no avail. I have no doubt that I am missing something obvious, but would appreciate any help that can be had. KS ----------Oracle Stored Proc Header----------------- PROCEDURE SP_CUSTREV_BY_INDVD ( p_Indvd_Type IN varchar2, p_Indvd_Id IN varchar2, p_OrderNme IN varchar2, p_SortType IN varchar2, p_DecisionCode IN varchar2, outlist OUT types.ref_cursor ) IS ---------------.net code----------------------- Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load 'Put user code to initialize the page here Dim conn As New OracleConnection("User ID=ME_USER;PASSWORD=ME_PASS;Data Source=WELLSPRING") Dim ds As New DataSet Dim xcp As Exception Dim oda As OracleDataAdapter conn.Open() Dim Cmd As New OracleCommand Cmd.Connection = conn Cmd.CommandText = "ME_SCHEMA.SP_CUSTREV_BY_INDVD" Cmd.CommandType = CommandType.StoredProcedure Cmd.Parameters.Add(New OracleParameter("p_Indvd_Type", OracleType.VarChar)).Value = "TSO" Cmd.Parameters.Add(New OracleParameter("p_Indvd_Id", OracleType.VarChar)).Value = "T000066700" Cmd.Parameters.Add(New OracleParameter("p_OrderNme", OracleType.VarChar)).Value = "CustNme" Cmd.Parameters.Add(New OracleParameter("p_SortType", OracleType.VarChar)).Value = "ASC" Cmd.Parameters.Add(New OracleParameter("p_DecisionCode", OracleType.VarChar)).Value = "All" 'Result Set Cmd.Parameters.Add(New OracleParameter("io_cursor", OracleType.Cursor)).Direction = ParameterDirection.Output Try oda = New OracleDataAdapter(Cmd) oda.Fill(ds) Me.dgr.DataSource = ds.Tables(0) Me.dgr.DataBind() Catch xcp xcpMessage = xcp.Message.ToString End Try conn.Close() End Sub -- Kasabaarde Sumta Tag: OracleParameter.IsNullable Tag: 96222
  - 14
    - Inserts and the Identity field I am trying to run an insert statement against a table, and I get an error: "Can not insert explicit value for identity column in table "table name" when Identity_Insert is set to off." Now, in the set up of the table, when I populate it, I set the Column in the columns collection to be an identity field and I set it to true and all that. This message seems to imply that I need to set something on the SQL Server side, through the database, but I'm thinking I shouldn't have to do that. How do I get around this? Can I just set some property through the ADO.Net? If so, what am I missing? I looked through about four pages of old posts and didn't see anything similiar, but I'm sure this has come up, and I apologize if I'm asking somethign that's been addressed already. Thanks, Thad. Tag: OracleParameter.IsNullable Tag: 96218
  - 15
    - Can I Use IN or CONTAINS in the Query Builder 'Can I Use 'IN' or 'CONTAINS' in the QueryBuilder of the DataAdapter's Configuration Wizard? When I use those words they are treated as text. I am able to use 'LIKE'. I would like to use either 'IN' or 'CONTAINS' followed by a parameter value in the 'criteria' column of the Query Builder -- Michael Hockstein Tag: OracleParameter.IsNullable Tag: 96211
  - 16
    - Performace and large datasets Hi, I have a SQL table with over 100,000 records. I have a stored procedure that return this record set to me(vb.net client), and i then display these records in a grid. The problem is that dataset waits for all the data, before the grid control can populate with this data. Is there away to get the dataset to allow the grid control, to access the dataset, even though it is not yet fully populate with data from the SQL server Hope this makes sense Tag: OracleParameter.IsNullable Tag: 96207
  - 17
    - DataSet and DateTime ? How can I extract a DateTime value from a Dataset in Asp.Net page to a DateTime field in code behind ? Here is my c# code: 1. Dataset ds=new Dataset (read by MS/Data Application Block) and was successfully displayed on the Asp.Net Data grid control. 2. DateTime dt=Convert.ToDateTime(ds.Tables[0].Columns["DateHired"].ToString()); I got an exception saying that the source field contains invalid data. The date displayed fine on the grid. Thanks Tom Tag: OracleParameter.IsNullable Tag: 96202
  - 18
    - DataSet Update I'm trying to update a modified dataset into an Access DB. Everything seems to work okay and I've run AcceptChanges on the dataset, but the number of updated records is always zero! Any assistance would be greatly appreciated. I've included the update function from my code at the end of this message. TIA Brad public int UpdateDataSet(System.Data.DataSet ds, string strTableName) { int iRecordsUpdated = 0; //Count of records updated if (Connect()) //Open a connection to the DB { //Creat the Select Command object System.Data.OleDb.OleDbCommand objCommand = new System.Data.OleDb.OleDbCommand("Select * from MyUsers",Connection()); //Create the Data Adapter using the previously created command object System.Data.OleDb.OleDbDataAdapter DA = new System.Data.OleDb.OleDbDataAdapter(objCommand); //Creat the command builder object using the Data Adapter System.Data.OleDb.OleDbCommandBuilder cb = new System.Data.OleDb.OleDbCommandBuilder(DA); DA.InsertCommand = cb.GetInsertCommand(); //This is the default SQL insert command DA.DeleteCommand = cb.GetDeleteCommand(); //This is the default SQL delete command DA.UpdateCommand = cb.GetUpdateCommand(); //This is the default SQL update command iRecordsUpdated = DA.Update(ds); //Update the database with the modified data set Disconnect(); //Disconnect the database } return (iRecordsUpdated); //Return the number of records updated } Tag: OracleParameter.IsNullable Tag: 96196
  - 19
    - DataTable.Select Bug in .Net Framework 1.1 SP1 Once again I'm submitting a bug introduced with .Net Framework 1.1 SP1 that is breaking our application. We use DataTable.Select method all over our application. One of the places we use it is to filter some Entity information for permanent deletion from the database! We noticed that the code that worked perfectly for months stoped working with SP1 of .Net Framework 1.1 with information loss since there were database deletions! We use loads of filters like this one: "(HistoryStartDate >= #07/01/2004 00:00:00#) AND EntityId=7016 AND FieldId=70 AND Deleted=0" this worked perfectly without .Net Framework SP1 but not with SP1. We have put together a Test Harness (with source code) at: http://pwp.netcabo.pt/0434926301/ The sample default filter is the one specified above wich should return 0 rows when applied to the default sample data (TestData.XML - included with the Test Harness). The problem is that the Date part of the filter doesn't work properly and rows are returned. If you try to apply just the Date part of the filter to the same sample data no rows are returned (the expected result!). I have seen other threads reporting this problem but it seems like the guys at Microsoft aren't very concerned since there are no replies. If someone out there could help I would very mutch appreciate it. I tried everything I could remember but made no progress. This is a very serious problem for us. Thanks in advance. Tag: OracleParameter.IsNullable Tag: 96195
  - 20
    - Trap rowchanged on DataTable I have a datagrid with a datatable as datasource, what I want to do is add a timestamp to a row (in a DateTime field) each time a Quantity field is filled. I've tried it with the grdColStyle4.textbox.TextChanged addhandler but since I can fill this field both by entering it manual or double clicking it it's not working well... I want to use something like this but the rowupdated event never gets trapped if I use the datagrid: AddHandler MyTempOrderTable.RowChanged, New DataRowChangeEventHandler(AddressOf DataTableRow_Changed) Is there an alternative way to do this? Regards, Mike Tag: OracleParameter.IsNullable Tag: 96194
  - 21
    - editing in binding manager I need some help. Hopefully will be simple. Usually I have users edit data in a data grid and then I call the update routine if the dataset has changes. I have an instance where data is bound to text boxes on a form. If the user needs to edit the information in one or more of these text boxes, these edits are not being saved back to the database. If threw in an if statement (if ds.haschanges then update...) but when debugging it is seeing that the dataset does not have changes. So I take it that directly typing into a text box that is bound to a field in the dataset does not directly change that data and set that row to modified? What might I be doing wrong here? Thanks for the information. Brad Tag: OracleParameter.IsNullable Tag: 96193
  - 22
    - Crystal Report - From stored proc. to unbound fields Hi all, I'm actually filling a report created with CR, using a stored proc. The data is returned in an ouput parameter of ref cursor type, and retrieved from a dataset using ADO. To display the data on the report, i used unbound fields, as i have single values only. Meaning, my dataset has one row but with multiple columns, each of them, bound to my unbound fields. Those unbound fields were added to the Header section of the report, as they need to be displayed only once. That works perfectly, i bound them using this code from a class : FormulaFieldDefinitions fielddefs; fielddefs = myrpt.DataDefinition.FormulaFields; DataRow r = ds.Tables[0].Rows[0]; foreach(FormulaFieldDefinition f in fielddefs) { f.Text = r[f.Name].ToString(); } Reportviewer.ReportSource = myrpt; The name of each unbound field, has got the same name of the column name in my dataset. Ok, my question is, assuming i would now have several rows in my dataset, the data should normally be displayed in the details section. So , how to bind my unbound fields to the dataset in this case ? I've tried the SetDatasource method, but it didn't work. Any Idea ? Thanks, Mike Tag: OracleParameter.IsNullable Tag: 96189
  - 23
    - TimeStamp with DataTable Hi! I have DataGrid bound to DataTable. I create DataTable "on fly" when application start without database connection. I use datagrid only to create simple XML-file for other purposes. Question: DataTable contains "Time"-column, and I need to get time into it automatically of the moment, when user adds a new row into DataGrid, but how to do it? It can't be only something like dc.DefaultValue = DateTime.Now; because time is not then time of the moment when DataGrid row was added by user. I think this must be easy, but I don't get it yet. Here's some of my code, if needed... DataColumn dc; dc = new DataColumn("Time"); dc.DataType = typeof(DateTime); dc.DefaultValue = DateTime.Now; dt.Columns.Add(dc); ... if(dc.ColumnName.ToString() == "Time") { textColumn.Format = String.Format("G", textColumn.TextBox); textColumn.ReadOnly = true; } -- Thanks in advance! Mika Tag: OracleParameter.IsNullable Tag: 96186
  - 24
    - More efficient way required. Hi I need a very efficient solution to a problem that I am sure must be a fairly common one. I have a web application that is database driven. The behaviour of the web site is goverened by various database settings, for example font-type, font-size as well as access to functionality (this function switched on/off) etc. For sake of simplicity, let us assume that all this information is held in three tables with almost identical schema. The first table contains all the settings for the Company, the next contains any over-rides required by a specific Department, and the third table contains all the over-rides required by a specific User. 4 use-case scenarios: + User A uses the company default values; the specific values in the Department and User tables are 'NULL'. + User B uses his Department values to over-ride the values in the Company table (his user record has 'NULL' + User C uses her own values to over-ride both the Company and the Department values. + User D uses his own values to over-ride the Company values; Department record contains 'NULL' So, the scenario is that the UI demands to know (say) 10 parameters for a particular user. Some values are therefore likely to come from all three tables. So, what is the fastest/most scalable way to achieve this (using VB.Net, ADO.NET, SQL)? The information will be READ only at this stage. [I am extremely new to .NET (VB6 back-ground) and THINK that I require a DataReader object to be returned to the UI, though am happy to be advised on this.] In VB6, I guess that I would have done this by: + The UI calls the BL asking for a particular User's settings. + The BL calls the DL asking for a hierarachical recordset (data-shaped). This contains the User record, the Department record and the Company record. + The BL then iterates through the User record - for every 'NULL' value it looks in the Department record and (if that's NULL too) in the Company record. It then returns to the UI the "merged" results. Many thanks in advance! Griff Tag: OracleParameter.IsNullable Tag: 96174
  - 25
    - Crystal report - failed in changing the Logon information at runtime all, I am having issue changing the DB logon information at the runtime when loading non-typed Crystal Report file to .NET WinForm application. I checked the connection string values and confirmed they are all correct. The error message and partial codes are listed below, except I replace the db connection string variables with string values. The similar logics works fine in typed-report(of course, using report class instead of ReportDocument). Based on all the document and sample I have, I can't think of anything missing? Thanks for any help, Michael =========Exception Error Message ======= "Unhandled Exception: Log on failed. Exception Type: CrystalDecision.... Inner Exception: Type: System.Runtime.InteropServices.COMException Message: Logon failed. Error in File C:\Docume~1\.....\{D371789A....}.rpt Unable to connect: incorrect log on parameters Stack Trace: ..... " =========== partial codes ========== ReportDocument reportClass= new ReportDocument(); reportClass.Load(ReportFilePath); TableLogOnInfo logonInfo = new TableLogOnInfo(); foreach(Table table in reportClass.Database.Tables) { logonInfo = table.LogOnInfo; logonInfo.ConnectionInfo.ServerName = "localhost"; logonInfo.ConnectionInfo.DatabaseName = "TestDB"; logonInfo.ConnectionInfo.UserID = "sa"; logonInfo.ConnectionInfo.Password = "pswd"; // Apply the connection information to the table. table.ApplyLogOnInfo(logonInfo); } this.rptViewer.ReportSource = reportClass; Tag: OracleParameter.IsNullable Tag: 96171

using VS2003

Question:-
If OracleParameter.IsNullable = False and OracleParameter.value =
DBNull.Value what does oracle recieve?

Bug?:-
OracleParameter.Isnullable does not appear with Intellisense, however it can
be typed in

guy

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RE: OracleParameter.IsNullable by NGCdeveloper1

NGCdeveloper1
Sun Jan 16 10:47:04 CST 2005

added information of benefit of Microsoft discussion monitor in establishing
bug report/tracking:
bug in Intellisense listing is co-related to a list entry erroneously
present. OracleParameter.IsNullable property is missing.
OracleParameter.set_IsNullable private method is present; attempting to use
it always causes a build-time error for lack of privilege.
Impact is low because the missing property can be typed in (without help
from Intellisense)

whether solution to Intellisense problem is in IDE implementation, C#
implementation, or FCL implementation

"guy" wrote:

> using VS2003
>
> Question:-
> If OracleParameter.IsNullable = False and OracleParameter.value =
> DBNull.Value what does oracle recieve?
>
> Bug?:-
> OracleParameter.Isnullable does not appear with Intellisense, however it can
> be typed in
>
>
> guy

Top