Efficient find in dataset

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  - 1
    - Using SetDataBinding question Hi If a Table row is being changed in the code after the call has been made for grid.SetDataBinding, do I need to call this grid SetDataBinding method again after I call the Table.AcceptChanges (), or will it automaticaly update the grid info? The DataRow is being changed in the code and the grid is read only. Thanks, Ronen Tag: Efficient find in dataset Tag: 74910
  - 2
    - Win98 memory bottleneck for using XML in MSDE2000 Used to read newsgroup for answers, now have to ask for them as well. I have an application (C#, .NET 1.1) that connects to local db on MSDE 2000 SP3a (using ADO from MDAC 2.71) on one side and to a web service on the other (not relevant I guess). Some stored procedures consume xml produced by DataSet objects (values as elements) using OPENXML statements. The application should be distributed among users having also Win98. Established that I require min 128 MB of physical memory to run it. However on Win98 I need to set 'min server memory' value to 128 otherwise even small OPENXML statement, which is first in the application lifecycle (so I could not have missing sp_xml_removedocs statments before) ends up with an error 'server memory low, use sp_xml_removedocument ...'. It turns out that users having even 256MB get that error as well, when larger XML is consumed by MSDE. That I could understand, but I managed to configure application to run on Win98 with 128MB!!! Only after some time users started to receive that errors, and even restarts and running the application without any other applications running at the same time, didn't help. What could have changed in memory management assuming no other apps were installed? Tried setting up 'min memory per query' to even 32MB; tried to set up 'min/max server memory' to 128 (and more); tried to set up 'min/max server memory' and 'set working set size' to 1 (it should reserve memory for SQLserver process). I used 'reconfigure' statments and performed restarts after having set above values as well. Is there any other way I could force Win98 to give memory to MSDE or to parsuade xml parser to be more memory efficient? What I also know: - MSDE instllation does not have msxml2.dll, so I included it in my installation package (downloaded msxml2.msi from Microsoft with dll file ver 8.30.9523.0, looks pretty new to me) - XML parser in MSDE 2000 (any SQL 2000) uses 1/8 of memory available for SQLserver, and that value cannot be changed (or can it?) - MSDE 2000 cannot use XML other than MSXML2, and nothing can change it, so I guess no help comes from MSXML upgrade - XML parser uses A LOT of memory, and can consume several times more memory that XML size - memory management in Win98 sucks, but I cannot leave Win98 out of my application distribution list If you got that far in my post, thanx for that. Rgds, Andrzej Tag: Efficient find in dataset Tag: 74907
  - 3
    - Sorting DataTable without DataView I'm using DataTable in console application and I have to sort the rows. Is it possible to sort DataTable without using DataView.Sort property? I'm accessing DataRow by DataTable->Rows->Item[int] Is it possible to avoid additional layer that DataView enforces? I don't have any logical or GUI controls that I bind data to. Thanks in advance for any solution. Tag: Efficient find in dataset Tag: 74903
  - 4
    - Dumb question about strongly typed datasets Okay, I am sure this is right in front of my nose, but I cannot figure out how to do this... I have a strongly typed dataset (STDS) generated by xsd in CSharp. I have the code in place to populate the various tables (7 of them) with datarows. How do I now update this back to the database? Do I need 7 SqlDataAdapters, each one with the appropriate Command members? If so, where can I get the 7 SELECT statements? They are not stored in the STDS anywhere. If I have to remember the queries used to generate the STDS, then where is the benefit? I should be able to tell the STDS to 'save yourself' back to the table(s) you were designed from'. Tag: Efficient find in dataset Tag: 74902
  - 5
    - Moving in DataSet...Manually (code)?? Greetings, After an ugly expiernce with form data-binding, I will be very thankfull if someone please can show me how to move in dataset manually, through code?? MTIA, Grawsha Tag: Efficient find in dataset Tag: 74901
  - 6
    - Generate Tables and Sproc with vb.net Hi, I need to generate my sql tables and stored procedures. I have made a .sql file where I have all my tables and stored procedures with Sql Server Enterprise Manager So the question is how to generate all of them from a vb.net ? The best would be to read the file from the disk and create the different tables and sproc. Thanks for your help Stan Tag: Efficient find in dataset Tag: 74900
  - 7
    - Database Access Base Class I thinking that I want to write a class which handles all database access hiding from the calling program what type of database which is being accessed and all of the database specific things. I would include methods to bind the dataset/datareader to the control, returning a datatable and the dataset if necessary. All updates would be done through methods, etc. One of the problems that I can see which is somewhat of a challenge to deal with are stored procedure parameters. There is some commonality of the datatypes across the various databases (OleDB, SQL, Oracle), but there is not uniformity. I was thinking that I would use the generic DbType and have the calling program pass this data type and then translate it to the appropriate type of the database which is actually being accessed, but this would not handle all situations. Any idea how I can overcome this? Is there a better design approach? Tag: Efficient find in dataset Tag: 74899
  - 8
    - XML and SqlServer Hello, I trying to use the For XML for the first time and am trying to figure out the "Explicit" option. Going over the example in the documentation, they show a sample which looks like the following: SELECT 1 as Tag, NULL as Parent, Customers.CustomerID as [Customer!1!CustomerID], NULL as [Order!2!OrderID] FROM Customers I am hoping someone can confirm my interpertation here. The first line, the "1" is used merely for sorting purposes to sort the "structure" in front of the data. The second line is specifying that for the first field retrieved, it has no parent. The 3rd line is telling that it should map the "CustomerID" field as an attribute of the Customer Element. The forth line is saying to map an attribute of OrderID to a Element of Order. Is that about right? Questions.. Why does the 4th line specify "Null" while the 3rd specifies "Customers.CustomerID". I guess I really do not understand how to properly use this column. In the output, below - where did "cid=C1" come from? I am guessing this is CustomerID field? How did it get associated with "cid". Does the "pid='P1'" is this related to the Tag Number? Why is it needed? This is the output they are creating in this example... <Customer cid="C1" name="Janine"> <Order id="O1" date="1/20/1996"> <OrderDetail id="OD1" pid="P1"/> <OrderDetail id="OD2" pid="P2"/> </Order> <Order id="O2" date="3/29/1997"> ... </Customer> Thanks in advance for your assistance!!!!!!! Tag: Efficient find in dataset Tag: 74894
  - 9
    - Switching from ADO to ADO.NET example needed I've been developing in VB6 & DAO for quite some time. I have figured out how to use ADO (see the following code sample) but want to drop ADO and move to ADO.NET. Can someone please point me to an article or book or re-do the code below so I can move on. I have the MSDN article "ADO.NET and You" which got me started, I have a good connection string but just can't figure out how to get a single record, grab it's value, and update it if necessary. Thanks! Rick Lederman, rick@soaringsoftware.com, www.soaringsoftware.com Dim cnFAMax As New ADODB.Connection cnFAMax.Provider = "Microsoft.Jet.OLEDB.4.0;" cnFAMax.CursorLocation = ADODB.CursorLocationEnum.adUseServer cnFAMax.Open("Data Source=" & sCDatabaseName & "; Jet OLEDB:Database Password=" & sMasterDatabasePassword & ";") sSql.Remove(0, sSql.Length) sSql.Append("SELECT PARAMETERS_.* FROM PARAMETERS_;") Try rsSearch.Open(sSql.ToString, cnFAMax, ADODB.CursorTypeEnum.adOpenDynamic, ADODB.LockTypeEnum.adLockOptimistic) Catch ex As Exception MsgBox("The Recordset failed to open") End Try 'MyOptions.PercentRemainingRed() rsSearch.Find(("NAME_ = 'MyOptions.PercentRemainingRed'")) If rsSearch.EOF = True Then MyOptions.PercentRemainingRed = 30 rsSearch.AddNew() rsSearch.Fields("NAME_").Value = "MyOptions.PercentRemainingRed" rsSearch.Fields("VALUE_DOUBLE").Value = 30 rsSearch.Update() Else MyOptions.PercentRemainingRed = rsSearch.Fields("VALUE_DOUBLE").Value End If rsSearch.MoveFirst() ' Then I do another .Find to find the next appropriate record & test it's value the same. Thanks again! Tag: Efficient find in dataset Tag: 74893
  - 10
    - [ANN] PgSqlClient 1.0 Beta 5 released. Hello: Beta 5 version of PgSqlClient an ADO.NET Data Provider for PostgreSQL 7.4+ released. Beta 5 ( 18-12-2003 ) ---- - - -- -- ---- - * Bug fixes. * Minor improvements in PostgreSQL 3.0 protocol implementation. PgSqlClient 1.0 Beta 5 source code is available at: http://prdownloads.sourceforge.net/pgsqlclient/PgSqlClient-1.0-Beta5-Src.zip?download PgSqlClient 1.0 Beta 5 binaries for .NET 1.0 available at: http://prdownloads.sourceforge.net/pgsqlclient/PgSqlClient-1.0-Beta5-NET1.0.exe?download PgSqlClient 1.0 Beta 5 binaries for .NET 1.1 available at: http://prdownloads.sourceforge.net/pgsqlclient/PgSqlClient-1.0-Beta5-NET1.1.exe?download -- Best regards Carlos Guzmán álvarez Vigo-Spain Tag: Efficient find in dataset Tag: 74890
  - 11
    - ADO.NET Parameterized Queries - Better Performance ? Hi, I dont have stored procedures since my app needs to be Database independent in the sense that I should be able to use SQL Server or Oracle. I have wrapped the entire data access functionality with a custom data layer through which all database calls would be made. Right now, the sqls are being built by string concatenation. Will changing this to parameterized queries using OldDbParameter objects increase performance ?? Regards, Vikram Tag: Efficient find in dataset Tag: 74889
  - 12
    - Constraint-Problem Hello NG, I've a dataset which gets it's data from a sql= "select usr,grop from tab1 where ..." where usr is primary key field in this ORA-Table. But creating the primary-Key-Constraint will cause an error because "values are not unique" (correct translation?? in german "nicht eindeutig") With cmd .CommandText = SQL .Connection = cnORA End With da.SelectCommand = cmd da.Fill(ds, "PRF_tab1") With ds.Tables("PRF_tab1") ERROR-> .Constraints.Add("USR_KEY", .Columns("USR"), True) End With I've tried the select in ORA-Worksheet, I cannot find any double values. Where is the problem?? thanks! Peter Tag: Efficient find in dataset Tag: 74885
  - 13
    - A connection pooling error has occurred I just upgraded a webservice to VS 2003 / Framework 1.1. Since the upgrade, when I run the test harness against it, I get the error messag "A connection pooling error has occurred". It occurs when calling the .Close() in a wrapper class. It appears to be closing the connection, when I break on the line the error is about to occur on, the connection state is "Open". When the error occurs, I check the connection state again and it's closed. Code follows: #region Constructors public SQLTextComponent() { InitializeComponent(); Core.EdenConnectionInitializer.InitializeConnection(this._edenConnection); this._edenConnection.Open(); } #endregion #region Destructors ~SQLTextComponent() { if (this._edenConnection.State == ConnectionState.Open ) { this._edenConnection.Close(); // <-- Error occurs on this statement } } #endregion Tag: Efficient find in dataset Tag: 74884
  - 14
    - Newbie question about DataGrid Hello! If I add new row into databinded DataGrid by selecting for example certain product code from columns drop down list, is it possible to automatically show for example description in the next cell to the right for this selected product cell, but when saving content of the grid just save product codes column data using DataAdapter.Update-method? I mean it's like INNER JOIN query to the 'products' -tables 'description'-field in DB. Hopefully you understand my question, I'm finnish. -- Mika Tag: Efficient find in dataset Tag: 74879
  - 15
    - Possible bug in System.Web.UI.Utils.QuoteXmlValue ? I might have found a possible bug in the static, internal method QuoteXmlValue of the class System.Web.UI.Utils: to find out if one of the characters & < > or " (isn't ' missing?) is in the unquoted-string: unquoted.IndexOf ("&<>\"") is used. Isn't this wrong? Shouldn't it be unquoted.IndexOfAny("&<>\"'".ToCharArray()) ? Tag: Efficient find in dataset Tag: 74878
  - 16
    - Execute Command Question Hello, I have a sub, ExecuteCommand(), that I pass Insert, Update, and Delete commands to, Inside this sub I create a Command and DataAdapter object that executes the incoming command. The question I have is should I create these objects as Local DIM's everytime the SUB is called or should I create them as Private instance variables of the class and reuse them? Thanks, Rob Panosh Advanced Software Designs. Tag: Efficient find in dataset Tag: 74877
  - 17
    - ANN- www.knowdotnet.com finally released We finally released www.knowdotnet.com , a general .NET web site focusing on Regular Expressions, ADO.NET, C#, VB.NET, Visual Studio .NET Add-ins and everything else .NET. Currently we have about 80 new articles posted with many more to come... enjoy. -- W.G. Ryan bill@leavethisout.devbuzz.com dotnetguru.LeaveThisOut@comcast.ThisToo.net Tag: Efficient find in dataset Tag: 74876
  - 18
    - Additional functions in DataColumn.Expression Any one know of a way to make additional functions available in a DataColumn.Expression? I'm thinking of things like date manipulation (DateDiff, etc.). Is it possible to inherit from DataColumn? Would I have to handle Changed events in the columns on which the Expression was dependant, and then do the calculation myself. Are there any third party DataSet controls that would do this kind of thing? Tag: Efficient find in dataset Tag: 74871
  - 19
    - Dataset for specific table structure for CheckBoxList This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C3C561.D82B93E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello! I wonder what is the best way to create a dataset for the table = structure below and use it with a CheckBoxList. Table structure Contacts Events ContactEvents ContID EventID _ContID ContName EventName _EventID =20 Example of data Contacts Events ContactEvents 230, Elvis Presley 13, Golf 230, 29 234, Bill Clinton 14, Soccer 234, 29 237, Stuart Graham 17, Hockey 234, 28 21, Basket 234, 17 28, Fotball 237, 13 29, Music 237, 14 In example above you can see, that Elvis likes Music. Bill likes Music, = Fotball and Hockey. Stuart likes Golf and Soccer. I have a CheckBoxList with all the Events where the user should be able = to check or uncheck the different events. If I want to add Music event = to Stuart my save function deletes all rows in ContactEvents with = _ContID=3D237, return the CheckedItems, and inserts three new rows with = _ContID=3D237. This doesn't seem to be the best solution. I don't get = how to do this, and how to write the select query for the dataadapter to = get all Events (so a commandbuilder can be used). I think I should be = able to use less code and letting the components do the work?!?! The = CheckBoxList has the Datasource property (and Displaymember/Valuemeber), = but I can't find the benifits of using it. Should I use another component? Regards Magnus ------=_NextPart_000_0008_01C3C561.D82B93E0 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 6.00.2713.1100" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=3DArial size=3D2>Hello!</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I wonder what is the best way to create = a dataset=20 for the table structure below and use it with a = CheckBoxList.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2><U>Table structure</U></FONT></DIV> <DIV><FONT size=3D2></FONT> </DIV> <DIV><FONT size=3D2><FONT=20 face=3D"Courier = New">Contacts          =      =20  <FONT=20 size=3D2>Events         &nbs= p;=20 ContactEvents</FONT></FONT></FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D2>  =20 ContID           &= nbsp;   =20   =  EventID         =20 _ContID</FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D2>  =20 ContName          &nbsp= ;  =20    EventName       =20 _EventID</FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D2>  </FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D2><U>Example of = data</U></FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D2></FONT> </DIV> <DIV><FONT face=3D"Courier New" size=3D2> <DIV><FONT size=3D2><FONT=20 face=3D"Courier = New">Contacts          =     =20   <FONT=20 size=3D2>Events         &nbs= p;=20 ContactEvents</FONT></FONT></FONT></DIV></FONT><FONT face=3D"Courier = New"=20 size=3D2>   230, Elvis = Presley       13,=20 Golf         230, = 29</FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D2>   234, Bill=20 Clinton        14,=20 Soccer       234, 29</FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D2>   237, Stuart=20 Graham       17,=20 Hockey       234, 28</FONT></DIV> <DIV><FONT face=3D"Courier New"=20 size=3D2>          &nbs= p;           &nbsp= ;     21,=20 Basket       234, 17</FONT></DIV> <DIV><FONT face=3D"Courier New"=20 size=3D2>          &nbs= p;           &nbsp= ;    =20 28, Fotball      237, 13</FONT></DIV> <DIV><FONT face=3D"Courier New"=20 size=3D2>          &nbs= p;           &nbsp= ;    =20 29, Music        237, 14</FONT></DIV> <DIV><FONT face=3D"Courier New" size=3D2><FONT = face=3DArial></FONT></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>In example above you can see, that = Elvis likes=20 Music. Bill likes Music, Fotball and Hockey. Stuart likes Golf and=20 Soccer.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>I have a CheckBoxList with all the = Events where the=20 user should be able to check or uncheck the different events. If I want = to add=20 Music event to Stuart my save function deletes all rows in = ContactEvents=20 with _ContID=3D237, return the CheckedItems, and inserts three new = rows with=20 _ContID=3D237. This doesn't seem to be the best solution. I don't get = how to do=20 this, and how to write the select query for the dataadapter to get = all=20 Events (so a commandbuilder can be used). I think I should be = able to=20 use less code and letting the components do the work?!?! The = CheckBoxList has=20 the Datasource property (and Displaymember/Valuemeber), but I can't = find=20 the benifits of using it.</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Should I use another = component?</FONT></DIV> <DIV><FONT face=3DArial size=3D2></FONT> </DIV> <DIV><FONT face=3DArial size=3D2>Regards = Magnus</FONT></DIV></BODY></HTML> ------=_NextPart_000_0008_01C3C561.D82B93E0-- Tag: Efficient find in dataset Tag: 74869
  - 20
    - ANN: Report Sharp-Shooter 1.6 has just been released! 9Rays.Net is pleased to announce: Report Sharp-Shooter 1.6 has just been released! New features include: -New report designer - Unlimited undo/redo - Document tree - Data Sources tree with drag'n'drop - Possibility of building custom designer from blocks (ToolBox, ToolBar, PropertyGrid, DocumentTree etc.) - Full design time for third party business objects (not ADO.NET) - Many improvements -New fast excel export filter (does not require installing of Microsoft Excel) -RichText control -More stable work in ASP.NET applications -New exception handling mechanism with easy bug-tracking -New examples Visit us at www.9rays.net for more info. -- Eugene Akinshin, PhD 9rays.net (Reporting and instrumentation components) Tag: Efficient find in dataset Tag: 74867
  - 21
    - TextBox databinding (using endcurrentedit) Hi, I have a .NET textbox bound to a DataColumn (String data type). What I want is that when the the user leaves the focus from the textbox, the changes are automatically updated to the the DataTable (ie containing the Datacolumn to which the textbix is bound). The method I use is to call the 'EndCurrentEdit' method for the corresponding CurrencyManager. This method works fine except under the following condition: The textbox undergoes a modification such that the length of the Text property in the TextBox does not change (ie is the same as that of the String in the DataColumn). This happens for example when a user makes a type and changes one letter (or two) instead of adding new words or deleting words. In this case, the datarowview (referenced by the 'Current' property in the corresponding CurrencyManager) is not in edit mode (ie 'IsEdit' is false). Calling 'EndCurrentEdit' will not update the DataColumn at all. Can anyone confirm this is a .NET bug? Is there a workaround for this? Does this happen in any other .Net controls? Thanks in advance. A sample code is available. John Tag: Efficient find in dataset Tag: 74864
  - 22
    - Oracle Client Namespace I am getting an error ORA-12154: TNS:could not resolve service name the following code i am using Dim oraconn As New OracleConnection("server=exxxx1;user id=xxxxxxx;password=xxxxxx;Integrated Security = true") The following code generate the error below: Dim oraconn As New OracleConnection ("server=xxxxx1.xx.xx.com;user id=xxxxxxx;password=xxxxxx;Integrated Security = true") ORA-01004: default username feature not supported; logon denied Dim oraconn As New OracleConnection("Data Source=xxxxx1.xx.xx.com;user id=xxxxxxx;password=xxxxxx;Integrated Security = true") ORA-01004: default username feature not supported; logon denied I tries using oledb and odbc also. I am unable to connect to the oracle. I read in one of the articles that since the ASP.NET is running a impersonate account in the windows it may not access OCI. But i given Admin acess to asp.net account. Am i missing something? Thanks Ravi Tag: Efficient find in dataset Tag: 74858
  - 23
    - Auto Incrementing Values I have an Invoice table in my database with 'InvoiceID' as its primary key. I would like the InvoiceID field to auto increment values in the format INV1, INV2, INV3........INV100.so on and so forth. How do I go about it? Thanks! Tag: Efficient find in dataset Tag: 74851
  - 24
    - Multiple Fill() calls crash system I'm using ODBC with MySQL, and am having difficulties updating a DataSet when using a parameterized query multiple times. The SELECT queries I'm using work fine with multiple Fill() commands if they don't have parameters, but the param. versions generate the following ODBC error when run the second time: [MySQL][ODBC 3.51 Driver][mysqld-3.23.40-nt] SQLBindParameter not used for all parameters I've tried calling Clear() on the DataSet to no avail. In stepping through the code, I've found that everything is initialized and all parameters have values, the only difference seems to be that a few internal variables of OdbcParameterCollection named CollectionIsBound and BindingIsValid start out False before the first Fill() and end up True after it. Furthermore, and ODBC trace shows that before the first Fill(), there are some calls to: SQLBindParameter. Before the second Fill(), there are no such calls. It seems like ADO is not sending the parameters to the ODBC driver after the first Fill(). Any suggestions? Thanks, Jim Tag: Efficient find in dataset Tag: 74850
  - 25
    - insert failes I'm tring to insert a new row to a table but it seems that it failes (I think) because the values of the new Row are null. here is the defenition of the table, I suspect that my problem is in the defenition. create table aa.dbo.Tasks ( ID int primary key identity(1,1), Done bit, TaskGroup varchar(30), Subject varchar(40), Initiator int, Resource int, Note varchar(200) ) Do I need to define default values? Yoramo Tag: Efficient find in dataset Tag: 74848
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    - default value in SQL Hi all, Does anyone know how to retrieve the default value set in Sql server in ASP.Net? any help or guildence will be appreciated. Calvin Tag: Efficient find in dataset Tag: 74847
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    - SQL Server Desktop Installation I recently bought a copy of Visual C#.NET Deluxe Learning addition. I was under the impression that this comes with SQL Server Desktop Engine. I installed everything I should have (I think), but when I type the commands to grant access to SQL at the DOS prompt, it tells me that SQL Server doesn't exist. The actual error message reads as follows: [DBMSLCPN]SQL Server does not exist or access denied. [DBMSLCPN]ConnectionOpen (Connect()). The problem might be that I also bought a learning addtion of Visual Basic.NET, and it told me it was installing "different" components than those already installed. However, I have two DIFFERENT installations of the .NET framework now; one that allows for C# development and one that allows for VB development. I can't imagine that ALL components were overwritten. I suppose I could re-install C# and hope for the best. Does anyone out there have any experience with this? Thanks in advance for your help. Tag: Efficient find in dataset Tag: 74844
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    - No Results Hello, I have looked at this and then looked at it somemore, but I can't see anything wrong... Here is my senario. I wrote a stored procedure to return information about the parms in a stored procedure. The idea being is that I will build all my Parameters for any stored procedure mechanically. I run this procedure in Query Analyzer and it runs fine I run the procedure in VS.Net as a stand alone proc and it runs just fine (says it returned 2 rows). I run the same procedure in a C# program, and it executes but no results ever comeback. I get a return code of 0, but no results. I put some code in and wrote all all the parm names and their values in the debug window, cut and pasted those values into Query Analyzer and ran those exact same parm names and values - and it ran fine - bringing back results. The only difference is that there were two parms in which I loaded "DBNull.Value" and I had to type "null" in query analzer. I have tried using a DataReader and a DataAdapter with each running successfully, but still no rows. How in the world could it run everywhere else other in my c# code? Here is some code... Set up my parms... cmd.Parameters.Add("@procedure_name",SqlDbType.NVarChar,390).Direction = ParameterDirection.Input; cmd.Parameters["@procedure_name"].Value= ProcName; cmd.Parameters.Add("@procedure_owner",SqlDbType.NChar,384).Direction = ParameterDirection.Input; cmd.Parameters["@procedure_owner"].Value=dbOwner; cmd.Parameters.Add("@procedure_qualifier",SqlDbType.NChar,384).Direction = ParameterDirection.Input; cmd.Parameters["@procedure_qualifier"].Value=dbName; cmd.Parameters.Add("@column_name",SqlDbType.NChar,384).Direction = ParameterDirection.Input; cmd.Parameters["@column_name"].Value=DBNull.Value ; cmd.Parameters.Add("@ODBCVer",SqlDbType.Int,2).Direction = ParameterDirection.Input; cmd.Parameters["@ODBCVer"].Value=System.DBNull.Value ; cmd.Parameters.Add("@RETURN_VALUE",SqlDbType.Int).Direction = ParameterDirection.ReturnValue ; My Command... cmd = new SqlCommand(); cmd.CommandText= dbName + "." + dbOwner + "." + ProcName; cmd.CommandType = CommandType.StoredProcedure; My Open cmd.Connection.Open(); The DataReader SqlDataReader dr = cmd.ExecuteReader(); The Read... while (dr.Read()) { Do Somthing - never get in here } Any Ideas? Tag: Efficient find in dataset Tag: 74835
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    - Connection won't disappear from SQL Server until app closes I have no problems connecting to SQL Server 2000 from VB.net and using all it's functions. However, when I close the connection, it stays active on the server until the application is closed. I have tried running commands with the drop connection parameter, closing the connection with close, dispose and setting it to nothing. Here is a sample of the code. The results of the code below is that the connection stays active. Is there a setting in VB, ADO.NET or SQL Server I can tweak to fix this? thanks in advance! Dim myConnection As New SqlConnection("data source=SRV-DC-MULTI1;database=Technical;Integrated Security=True") myConnection.Open() MessageBox.Show("ServerVersion: " & myConnection.ServerVersion & ControlChars.Cr & _ "State: " & myConnection.State.ToString()) myConnection.Close() myConnection.Dispose() myConnection = Nothing MsgBox("pause 2") Tag: Efficient find in dataset Tag: 74834
  - 5
    - Bug in SqlConnection, SqlClient connection pool or DTC? SqlConnection throws an exception when disposed if it is manually enlisted in a distributed transaction: System.InvalidCastException: Specified cast is not valid. Server stack trace: at System.Data.SqlClient.ConnectionPool.PutConnectionManualEnlisted(SqlInternalConnection con) at System.Data.SqlClient.ConnectionPool.PutDeactivatedConnection(SqlInternalConnection con) at System.Data.SqlClient.SqlConnection.Close() at System.Data.SqlClient.SqlConnection.Dispose(Boolean disposing) at System.ComponentModel.Component.Dispose() The error occurs when the transaction is cast to UCOMIConnectionPoint. I have tried to enlist in a distributed transaction created by a serviced component and a transaction created by the DTC proxy. Both yield the same error. The problem seems to be that the transactions created by my DTC doesn't support IConnectionPoint (I use Windows XP pro). I guess that the connection point is used to get a notification when the transaction ends and it is safe to return the connection to the connection pool. (OracleClient doesn't fail (the same way). It doesn't need the connection point. It returns connections directly to the connection pool when the they are disposed even if they still participate in a distributed transaction!) Is this a bug in SqlConnection, the SqlClient connection pool, the DTC or my code? Below is a short sample that generates the error. I need to enlist in the distributed transaction manually, because I want to use distributed transactions without using COM+. Any suggestions? Regards Søren Mondrup -----demo.cs---------------------------------------------- using System; using System.Reflection; using System.Data; using System.Data.SqlClient; using System.EnterpriseServices; using System.Runtime.InteropServices; [assembly: AssemblyKeyFileAttribute("demo.snk")] class App { static void Main(string[] args) { if (args.Length == 0) { Console.WriteLine("Usage: demo.exe <server_name>"); return; } try { string connStr = "Server=" + args[0] + ";Trusted_Connection=SSPI;Database=pubs;Enlist=false;"; using (ServicedFoo foo = new ServicedFoo()) { foo.DoTransaction(connStr); } } catch(System.Exception e) { Console.WriteLine(e); } } } [Transaction(TransactionOption.RequiresNew)] public class ServicedFoo : ServicedComponent { public void DoTransaction(string connStr) { ITransaction tx = (ITransaction) ContextUtil.Transaction; if( tx == null ) throw new Exception("Failed to create transaction."); using (SqlConnection conn = new SqlConnection(connStr)) { conn.Open(); conn.EnlistDistributedTransaction(tx); Console.WriteLine("Enlisted in transaction"); using (SqlCommand cmd = new SqlCommand("update sales set qty = qty + 1", conn)) { cmd.ExecuteNonQuery(); } ContextUtil.SetComplete(); Console.WriteLine("Has voted in favor of commit. Now disposing connection."); } // conn.Dispose() is called and an exception is thrown } } ----------------------------------------------------------- compile sample with sn ?k demo.snk csc demo.cs Tag: Efficient find in dataset Tag: 74829
  - 6
    - Binding forms? Hi, Do I have to release binding of form controls to dataset every time I do form search of filling?I mean, is there a shorter way than this? 'Binde textbox1 to dataset textbox1.databindings.add("text",ds,"Employees.firstname") 'unbinde for ReUse of binding prpty. Loop through all controls that were bound. textbox1.databindings.clear MTIA, Grawsha Tag: Efficient find in dataset Tag: 74828
  - 7
    - DataReader Hello, I am transitioning from VB to C# and I can't tell if my problem is to do with the format of my command or something else. I am getting an error of "Object reference not set to an instance of the object" when it hits this line of code.. int rtnValue = (int) cmd.Parameters["@RETURN_VALUE"].Value; I set my Parameter up as follows: cmd.Parameters.Add("@RETURN_VALUE",SqlDbType.Int).Direction = ParameterDirection.ReturnValue ; I used a "foreach" to loop through each of my parms, with the @RETURN_VALUE being the last one. Each time this loop generates the same error when it gets to the "@RETURN_VALUE". I do not see anything wrong with how I have set it up. Does the procedure that I am executing "HAVE TO" use the "return statement in order to properly populate the parm? Any ideas? Thanks inadvance for your assistance!!!!!!!!! Tag: Efficient find in dataset Tag: 74825
  - 8
    - GUID as parameter to stored proc causes Invalid Cast I am using the Microsoft Data Access Application Block for .NET code to interface to our SQL database. I have a stored procedure (CREATE procedure ixe_MarkBranchStatus @NodeState int = 0, @rootnode uniqueidentifier = null). I have the data for rootnode store as a string representation of a GUID in my C# program. I use the following code to supply the parameters: ********************************************************* storedParams = SqlHelperParameterCache.GetSpParameterSet (connStr,SQL_Name); for (int i = 0; i < storedParams.Length; i++) { switch (storedParams[i].ParameterName.ToUpper()) { case "@NODESTATE": storedParams[i].Value = newStatus; break; case "@ROOTNODE": storedParams[i].Value = GUID; break; } } if (SqlHelper.ExecuteNonQuery (connStr,CommandType.StoredProcedure,SQL_Name,storedParams) > 0) return true; *********************************************************** The SQLHelper (Microsoft supplied code) bubbles up an error: Invalid cast from System.String to System.Guid. The line that causes the error is: int retval = cmd.ExecuteNonQuery(); but a lot has gone on before this. This was not a problem until I recently converted from VS .NET, framework 1.0 to VS 2003, framework 1.1 Tag: Efficient find in dataset Tag: 74823
  - 9
    - Multiple transactions on the same connection? Hi, Wanted to know if I can have multiple transactions over the same connection. I am planning to have only one connection object in my application. For multiple users I want to begin different transctions over the same connection. I would be storing the transaction objects by userid in a hashtable. All the methods would then take in the userid and also know the right transaction object to be associated to the command object. Would this work.. ?? I do not think the transactions would be nested..as do not know what each user might do.. Thanks in advance. Tag: Efficient find in dataset Tag: 74822
  - 10
    - C# Training Videos Currently our C# Videos are free. Check them out at: http://www.vtmag.com We will be adding additional topics in the next few days like: ADO.NET ASP.NET VB.NET WinForms Application Blocks P.S. After viewing the videos go back to the website and rate them or send an email to let us know how we are doing! Thanks, Wade Beasley *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it! Tag: Efficient find in dataset Tag: 74821
  - 11
    - DbType To SqlDbType Is there some documentation which identifies how to translate a DbType to a SqlDbType and vice versa? Tag: Efficient find in dataset Tag: 74814
  - 12
    - SqlDataType Mone/SmallMoney In a VB.Net client, what datatype do you use in to supply a parameter of type "Money" or "smallMoney" Thanks in advance for your assistance! Tag: Efficient find in dataset Tag: 74808
  - 13
    - DataTable row changed Hi Is there a way to know if rows has been added/deleted from a DataTable (not using the exevts)? Thanks, Ronen Tag: Efficient find in dataset Tag: 74803
  - 14
    - ADO.Net Connection Strings Does anyone know the full connection string to use with ado.net for Sybase as well as PostGresql 3.0? Thanks Tag: Efficient find in dataset Tag: 74798
  - 15
    - Beginner question: run .sql I'm starting with ADO.NET and I found several samples where they ask to run .sql files (for creating stored procedures or so). I have the MSDE SQL Desktop engine and do not know how to run a sql script for this DB. Can I do it from inside VS.net ? Thanks Tag: Efficient find in dataset Tag: 74786
  - 16
    - navigation bar does not pass to added rows Hello I have created a simple application that has a form that displays one row each time. I have used the wizard to generate the code. my problem is that I can not navigate to added rows, I see the count of rows increasing but the navigation controls refuse to point on them. Can any one advice? Yoramo Tag: Efficient find in dataset Tag: 74779
  - 17
    - Updating hierarchical data I'm working with the Northwind database tables 'Customers', 'Orders', and 'Order Details': 'CustomerID' relates 'Orders' to 'Customers', and 'OrderID' relates 'Order Details' to 'Orders'. For displaying this hierarchical data I create a DataSet, append and fill a DataTable for each database table, and finally set up two Relations. Say, I want to bind the dataset to a flat (WebForms) DataGrid where each row consists of the columns 'CompanyName' (from table 'Customers'), 'OrderDate' (from table 'Orders'), and 'Quantity' (from table 'Order Details'). The grid should be editable, i.e. each data modification should be send back to the database. Are there any guidelines for implementing this efficiently? Is it possible to bind datagrid columns to different DataTables (which in turn belong to the same DataSet)? How can I retain the relationship between columns and DataTable items? Thanks in advance, PontiMax Tag: Efficient find in dataset Tag: 74772
  - 18
    - Updated lists of ODBC drivers, .NET providers, OLE DB providers, JDBC drivers The driver and provider lists (below) have recently been updated and moved to a new web site (www.SQLSummit.com): ODBC drivers http://www.sqlsummit.com/ODBCVend.htm .NET Providers http://www.sqlsummit.com/DataProv.htm OLE DB Providers http://www.sqlsummit.com/oledbven.htm JDBC drivers http://www.sqlsummit.com/JDBCVend.htm DB2 Extenders http://www.sqlsummit.com/extenven.htm Tag: Efficient find in dataset Tag: 74771
  - 19
    - BUG? OleDb AccessMdb Localization I think I found a bug in .NET 1.1 using the OleDb classes using: .NET 1.1 Access MDB file (2000 format) Localization set to Dutch (or probably any localization where the , is used for decimal and . is used for thousands) steps to reproduce problem: Create a OleDbCommand with a sql statement like INSERT INTO [TABLENAME] ( [DECIMALFIELDNAME] ) VALUES( ? ) Then use the Parameters.Add on the OleDbCommand to add a number for the ? variable, that uses a decimal. For example 2.75m After the insert executed the record appears as if no decimal sign was there, in this case it would be 275 instead of 2.75 probable cause: I think oledb (or access?) expects the value in local format, while OldDbCommand.Parameters supplies the InvariantCulture version. Tag: Efficient find in dataset Tag: 74770
  - 20
    - Object reference not set to an instance of an object What's wrong with this code? it would work perfect in vb. VB.net seem to be filled with error triggers... <script language="VB" runat="server" src="/scripts/main_lib.vb"></script> <script language="VB" runat="server"> Public PollMode As string = "vote" ' ***** the code below fails as object reference not set! Public urlRedirect As String = Request.ServerVariables("SCRIPT_NAME") </script> Please help. Tag: Efficient find in dataset Tag: 74753
  - 21
    - filtering child records How can you get the child records of a master record and then further filter the returned array down to more specific records? For instance, I search the array containing the child records for rows that have a value of "Today" in the Date column. I then want those identified rows copied to another array. Thanks for all responses. Regards, Martin Williams Tag: Efficient find in dataset Tag: 74752
  - 22
    - Unleash XML support from native Oracle Database driver Download Oracle Data Provider for .NET (ODP.NET) (http://otn.oracle.com/tech/windows/odpnet/index.html) today to empower your .NET applications with the Oracle Database! Try out the new features for XML support like: - Store XML data natively in the database server as the Oracle database native type, XMLType. - Access relational and object -relational data as XML data from an Oracle database instance into Microsoft .NET environment, process the XML using Microsoft .NET framework - Save changes to the database server using XML data. - Apply XSL Transformations while querying and retrieving relational data as XML from Oracle 8i or higher database into .NET Developers get started, learn about ODP.NET XML support features using comprehensive sample applications available at http://otn.oracle.com/sample_code/tech/windows/odpnet/index .html For providing feedback please use discussion forum at ODP.NET: http://forums.oracle.com/forums/forum.jsp? forum=146 Sample Code: http://forums.oracle.com/forums/forum.jsp? forum=133 Tag: Efficient find in dataset Tag: 74750
  - 23
    - Problem w/ SQL server's default value Hi all, I have a problem when creating a new record in SQL database when the column is Non-Nullable w/ default value. What I did was create SqlDataAdapter and DataSet, filled the DataSet w/ data AND schema. However, when I try to create a record with those default columns empty (i.e. not assigning value to them), the Update method of Adapter raises an exception that I am trying to creating a record w/ the non-nullable column set to null, even tho I have create a default value for them in Sql server. Any help would be appreciated. Calvin Tag: Efficient find in dataset Tag: 74748
  - 24
    - SqlServer: How to know if a a column is a primary key ? I have a database-generic application. CommandBuilder is not satisfactory. I try to generate my own command automatically but: I can't get PrimaryKey information ! I create a IDbCommand cmd;. cmd.CommandText = SELECT * FROM Table IDataReader dr = cmd.ExecuteReader(CommmandBehavior.SchemaOnly) and then I analyse dr.GetSchemaTable() the column "IsKey" is always set to DBNull.Value, at last on the PocketPC (with the compact framework) I know there is plenty of meta table in SqlServer. which one should I query to get primary key information ? Tag: Efficient find in dataset Tag: 74737
  - 25
    - SqlServer schema table erroneous ? I have a very basic test SqlServer table: Key ID Name DataType X id_0 int X id_1 int id_3 char I use the DataReader's method: GetSchemaTable() to get this information from the database in my .NET program (on the PPC, I use the compact framework) the column "IsIdentity" seems to be correctly filled. whereas the column "IsKey" seems to be not in fact I run the method in the debugger, querying manually all the column, I have no particular info on the "id_0" column, absolutely no way to know it's a primary key column !.... is it a bug of SqlServer in general ? or on the Compact frameqork in particular ? is there an other way to know a column is a primary key ? Tag: Efficient find in dataset Tag: 74734

Can I set up a primary key on a dataset after it has been populated - like
after the query has been run? I'm trying to do a look up on a dataset, but I
believe that using the find method is more efficient than looping thru the
dataset. Is this correct? Generally speaking?

--
Regards,
Alvin Bruney
Got DotNet? Get it here
http://home.networkip.net/dotnet/tidbits/default.htm

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Re: Efficient find in dataset by Miha

Miha
Thu Dec 18 12:37:07 CST 2003

Hi Alvin,

"Alvin Bruney" <vapor at steaming post office> wrote in message
news:%23djjbNZxDHA.1932@TK2MSFTNGP09.phx.gbl...
> Can I set up a primary key on a dataset after it has been populated - like
> after the query has been run?

Certainly yes.

I'm trying to do a look up on a dataset, but I
> believe that using the find method is more efficient than looping thru the
> dataset. Is this correct? Generally speaking?

Oh yes. :)

--
Miha Markic - RightHand .NET consulting & development
miha at rthand com

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Re: Efficient find in dataset by Alvin

Alvin
Thu Dec 18 13:08:04 CST 2003

thanks

--
Regards,
Alvin Bruney
Got DotNet? Get it here
http://home.networkip.net/dotnet/tidbits/default.htm
"Miha Markic" <miha at rthand com> wrote in message
news:uV2hxXZxDHA.3208@tk2msftngp13.phx.gbl...
> Hi Alvin,
>
> "Alvin Bruney" <vapor at steaming post office> wrote in message
> news:%23djjbNZxDHA.1932@TK2MSFTNGP09.phx.gbl...
> > Can I set up a primary key on a dataset after it has been populated -
like
> > after the query has been run?
>
> Certainly yes.
>
> I'm trying to do a look up on a dataset, but I
> > believe that using the find method is more efficient than looping thru
the
> > dataset. Is this correct? Generally speaking?
>
> Oh yes. :)
>
> --
> Miha Markic - RightHand .NET consulting & development
> miha at rthand com
>
>

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