Problem viewing XML file in VS.NET 2002

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 - sqlConnection if i open a connection and then open a datareader off that connection. then loop through the datareader attempting to perform updates through the same connection, then i get an error "There is already an open DataReader associated with this Connection which must be closed first." oh and the there is a transaction based on the connection. should i maybe use a dataset ? dan Tag: Problem viewing XML file in VS.NET 2002 Tag: 73674
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 - Import text file to access db table (OleDB, ADO, ADO.NET) The question of how to import a text file into the database table has been asked many times. The code that suits me was given by Paul Clement is the following: Sub ImportTextToAccessADO() Dim cnn As New ADODB.Connection Dim rs As New ADODB.Recordset Dim sqlString As String cnn.Open _ "Provider=Microsoft.Jet.OLEDB.4.0;" & _ "Data Source=e:\My Documents\DB1.mdb;" & _ "Jet OLEDB:Engine Type=4;" sqlString = "SELECT * INTO [tblSample2] FROM [Text;HDR=NO;DATABASE=e:\My Documents\TextFiles].[Sample2.txt]" cnn.Execute sqlString cnn.Close End Sub It works great but only if the table doesn't exist. My questions are how to do this if the following table already exists. Will bulk Insert like this work or do I have to use adapter to fill a dataset and then insert into the table row by row. Also how can I check if the table exists then I delete it and create a new one but with the same schema as it had before. Appying the above code to the table that doesn't exist creates a new table with columns labelled F1, F2, etc. How do I create custom columns? I would greatly appreciate any input on this (preferably using .NET). Thank you. Tag: Problem viewing XML file in VS.NET 2002 Tag: 73672
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 - Execute Non Query Error I am having a problem with ExecuteNonQuery. I have this code: Try strsql = "Insert into [Action] values (" & EndItem.intItemIdentifier & ", " & intActionIdentifier & ", '" & strOrg & "', '" & strStat & "', '" & strStatDate & "', '" & strDesc & "', '" & strTake & "')" Dim cmd As New OleDbCommand(strsql, conn) cmd.ExecuteNonQuery() Catch oledbExc As OleDbException MessageBox.Show(oledbExc.ToString, _ "", MessageBoxButtons.OK, MessageBoxIcon.Error) Catch ex As Exception MessageBox.Show(ex.Message, "", _ MessageBoxButtons.OK, MessageBoxIcon.Error) End Try I get this error message: ExecuteNonQuery requires an open and available Connection. The connection's current state is closed. Yet, I have the connection open at the top of the form and have used it in other instances and it runs perfectly. Public Class ActionEdit 'Inherits System.Windows.Forms.Form Inherits System.Windows.Forms.Form 'Public Shared CriticalParts As Form Public Shared conStr As String = "Provider=Microsoft.JET.OLEDB.4.0;data source=c:\\CPRdatabase.mdb" ' Create connection object Public Shared conn As OleDbConnection = New OleDbConnection(conStr) I am not sure what I am missing that gives me an error here and not anywhere else in my form. Thanks in advance! Elena Tag: Problem viewing XML file in VS.NET 2002 Tag: 73671
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 - Event handling Hi. I wrote simple C# app, that connects to SQL Server 2000 DB using ADO.NET. I want to monitor inserts to specified table from my app. That is, when someone inserts a row [or entire rowset] to this table, i want to catch this "event" and handle it [rather, i want to get the inserted data]. In old C, this was done with extended stored procedures and system events. Is there any easier way to do this in C# and ADO.NET? Thanks for answer. Regards Marek Samaj Tag: Problem viewing XML file in VS.NET 2002 Tag: 73670
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 - (newbie) SQL help and how to store it Hi- this is not a complicated question and probably get's asked often.... with that said, here is what I am trying to do. I have 3 tables table1 (products) ProdId ProdName ProdParentId table2 (faq_categories) CatId ProdId CatName table 3 (faq_main) FaqId CatId Question Answer What I want to do is get join all the "faq_categories" that match certain criteria in "products", then join all the "faq_main" that match the relevant faq_categories" Maybe it will make more sense if I show you how I would like to render the data Product1 Category 1 Q:asdasd A:asdagt345dfg Category 2 Q:asdflwfybsdf A:adkbafj Product2 Category 3 Q:asdfhkasfsd A:sdfh34hfsdf So, with that said... how do I do this? Is there a way to get them all at once or do I need to do subqueries? At the least what I would like to be able to do is get the "products" and "faq_categories" with the same query. Looking for help, not sure what to do. Thanks! Steve Tag: Problem viewing XML file in VS.NET 2002 Tag: 73668
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 - Data Access Peroperties' permissions grayed out I've tried to connect to SQL Server via VS.NET -- and I'm the dbo -- but the permissions area of the Data Access Properties area is grayed out. It only lets me view the objects, not edit/create in Server Browser. Any help is appreciated. Thanks. Tag: Problem viewing XML file in VS.NET 2002 Tag: 73663
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 - adding data,time and computername to a dataset Hello.. I have a problem in a c# application. I have a dataset that have a table cald tblcounter in this table I have 2 columns Computer_name and datetime. In the computer_name I want to store the clientnamn and in datetime I want to store the date and time the clientnamn was enter in the table This is the C# code I am using. DataRow anyRow = tblcounter.NewRow(); anyRow["processor"] = perf_processor_time.NextValue(); anyRow["memory_fri"] = perf_memory_fri.NextValue(); // the code to add clientnamn and date,time tblcounter.Rows.Add(anyRow); --------------- lennie Tag: Problem viewing XML file in VS.NET 2002 Tag: 73662
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 - ORA-01002 - fetch out of sequence HELP ME please :) Hello people, I have one problem with Oracle 7 and OracleClient Provider. I have a server with Win 2k and Client of Oracle 9i. My database is in a machine with Oracle 7. In the begininnig the database was in Oracle 9i. and my web application works fine. After I'd put the application in Oracle 7. But a problem became. Every query that I try to execute the error is showed: ORA-01002 - fetch out of sequence Is anyone knows what happened? Thanks a lot. Steven Alexander Tag: Problem viewing XML file in VS.NET 2002 Tag: 73661
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 - Datagrid problem? Hi! A stored procedure results records via an SqlAdapter to a dataset. I defined a dataview to that dataset for a datagrid. Some column in the grid are hided. The grid and the columns are readonly. And I have a textbox binded to the same dataview. There is a method clear the dataset, then to connect the server, fill the dataset and close the connection. I call this method in the form Load eventhandler. Running the app, I can see the records in the grid and the corresponding field in the textbox and moving in the grid by clicking on rows or by pressing keys is fine until I choose to refresh the dateset via the method mentioned earlier. Then clicking or pressing keys doesn't affect to the textbox value for a small undetermined time (20 - 50 clicks), then it works fine. While it is not working the black triangle stands on that row header, which was reached last time. What can I do? I need the textbox value for other computing. Tag: Problem viewing XML file in VS.NET 2002 Tag: 73655
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 - datagrid-update I have a datagrid with two columns-name,id and both are editable. My requirement is that I want my second column(id) as a non updatable column.Though I can change the values of column by editing it,upon saying update,the second shouldn't be updated. Do we have to set any property or do it programatically? If so,how? Tag: Problem viewing XML file in VS.NET 2002 Tag: 73649
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 - Losing strong typing when using DataRow.GetChildRows() This is just a general query about Data Binding. I've got a Custom (VS 2003 generated) DataSet with a number of strongly typed Custom DataTables within. I was trying out using DataRelations to save me doing looping compares in my code but I found that (obviouse in retrospect) DataRow.GetChildRows() returns DataRow[] which means i lose the strong typing of my rows (which i *really* dont want to do). Anyone come across this? Anyone any ideas about working around it? Any future plans for the VS 2003 auto- generated classes to provide helper functions, convertion operators or custom dataset/row contructors that take DataSet/Row as parameters. Thanks in advance Jan Bannister Tag: Problem viewing XML file in VS.NET 2002 Tag: 73644
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 - SqlDataAdapter.Update doesn't update Hi, In ASP.NET, i've got a web forms app, which does its data operations through a middleware DataManager dll. In one operation, the web form creates a types dataset from a stored schema, adds a DataRow to the single DataTable object and passes this to the dll for upload. ---begin webform function--- { ForumData fData = new ForumData(); PeopleDataSet pds = new PeopleDataSet(); DataTable dt = pds.Tables["People"]; DataRow dr = dt.NewRow(); dr["PeopleID"] = Convert.ToInt32(this.txtPeopleID.Text); dr["Name"] = this.txtName.Text; dr["Email"] = this.txtEmail.Text; dr["Password"] = this.txtPassword.Text; dr["Sig"] = this.txtSig.Text; dr["ShowDetail"] = Convert.ToBoolean(this.txtShowDetail.Text); dr["Photo"] = Convert.ToBoolean(this.txtPhoto.Text); dr["PicApprove"]= Convert.ToBoolean(this.txtPicApprove.Text); dr["MemberApprove"] = Convert.ToBoolean(this.txtMemberApprove.Text); dr["PlainText"] = Convert.ToBoolean(this.txtPlainText.Text); dr["DOB"] = Convert.ToDateTime(this.txtDOB.Text); dr["LastHere"] = Convert.ToDateTime(this.txtLastHere.Text); dr["SignedUp"] = Convert.ToDateTime(this.txtSignedUp.Text); dr["CountPosts"] = Convert.ToInt32(this.txtCountPosts.Text); dr["Title"] = this.txtTitle.Text; dr["AvatarID"] = Convert.ToInt32(this.txtAvatarID.Text); pds.Tables["People"].Rows.Add(dr); bool testval = fData.AlterPersonDetails(pds); //pds.WriteXml("c:\\pdsdataset.xml"); if (testval) { btnChange.Text = "Success"; } else { btnChange.Text = "Failed"; } } -- end webform function ---- That gets passed to the Public method, AlterPersonDetails, which is, naturally, just a passthrough to a private function --- begin Public Method --- public bool AlterPersonDetails(DataSet dsChangedPerson) { bool nValue = false; try { nValue = ChangePersonDetails(dsChangedPerson); } catch { nValue = false; } return nValue; } --- end Public Method --- Now, you'll note that i've taken the precaution of writing the DataSet XML to a file in order to check that it does indeed change. It does. Here's the problem. When mAdapter.Update is called, it doesn't appear to do anything at all. --- begin private function --- private bool ChangePersonDetails(DataSet dsChangedPerson) { bool returnval; SqlConnection mCon = MakeConn(); DataSet dsPeople = new XPeopleDataset(); mCon.Open(); SqlDataAdapter mAdapter = new SqlDataAdapter("SELECT * FROM People", mCon); SqlCommandBuilder mComm = new SqlCommandBuilder(mAdapter); mAdapter.Fill(dsPeople, "People"); dsPeople.Merge(dsChangedPerson.Tables["People"]); dsPeople.AcceptChanges(); dsPeople.WriteXml("C:\\xmlversion.xml"); int g = mAdapter.Update(dsPeople, "People"); mCon.Close(); returnval = true; return returnval; } --- end private function --- So, there's my problem. No exceptions, no problems and no changes to the database! If anyone can help, I'd really appreciate it, -- Rich Tag: Problem viewing XML file in VS.NET 2002 Tag: 73641
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 - datagrid expression-urgent My select query is a s follows select qty from sales; My datagrid as two template columns with textboxex in Item template.I want to use second template column as a compute column in my datagrid which depends on column 'qty' values of my select statement compute column's value should be as follows if( qty > 10) qty+10 else qty-10 How can give my 'DataBinder.eval(containder.dataitem))' expression to my textbox in html? How can I acheive this? How complex evaluation expressions can be given for datagrid columns either at design time or programatically? plzzz help me out thanks in advance, vijaya Tag: Problem viewing XML file in VS.NET 2002 Tag: 73640
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 - datagrid expression-urgent My select query is a s follows select qty from sales; My datagrid as two template columns with textboxex in Item template.I want to use second template column as a compute column in my datagrid which depends on column 'qty' values of my select statement compute column's value should be as follows if( qty > 10) qty+10 else qty-10 How can give my 'DataBinder.eval(containder.dataitem))' expression to my textbox in html? How can I acheive this? How complex evaluation expressions can be given for datagrid columns either at design time or programatically? plzzz help me out thanks in advance, vijaya Tag: Problem viewing XML file in VS.NET 2002 Tag: 73639
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 - DataSet-Generator/Typed Dataset: created class always "Dataset1" Hello, when i create a typed dataset from a given xsd-definition, the ms-dataset-generator always names the dataset-class "Dataset1". Of course it's possible, to rename the class in the source-code. But this modification get lost after every change in the schema. The source-code will be generated new in this case. Any idea, where i can find the right property, to set the classname before the source-code is generated? I use the MS-.NET-IDE and C#. Regards Daniel Tag: Problem viewing XML file in VS.NET 2002 Tag: 73634
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 - opening en closing Connection takes too much time!!! Hi, When I was looking for the reason my application was runnong so slow I suddenly noticed that it was the opening and closing of the connection that took almost all the time. Like in most of the samples I found I opened the connection everytime I needed it, and closed it after my action. But closing and opening everytime seemed to take very much time, so I opened my connection at the start of the application, and closed it at the end: it runned up to 20 times faster (before 1 action took 3-4 seconds, now I have 5 actions per second). So now my question: what's wrong with opening it one time and closing it at the end? Looking at the smaples I found this seems 'not done'? Does it really take so much resources to leave the connection the whole time open? Isn't the use of a property like this a nicer way to handle the database-connection? Property MyConn() As OleDbConnection Get If Not MyConn2.State = ConnectionState.Open Then MyConn2.Open() End If MyConn = MyConn2 End Get Set(ByVal Value As OleDbConnection) 'nothing? End Set End Property or maybe just before every use a: If Not MyConn.State = ConnectionState.Open Then MyConn.Open() End If Any help, any idea's, any remarks or reflections would be nice. I just thinks the much better performance justifies to leave the connection open. Is there any offical documentation about this? Thanks in advance! Pieter Tag: Problem viewing XML file in VS.NET 2002 Tag: 73624
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 - Common Connection I'm working on an ADO.NET project. I'd like to declare a Common Variable that can store the Connection String values for a Database. I need this variable to be able to initialise the database connection for all OledbDataAdapters across all Form modules. Thanks! Tag: Problem viewing XML file in VS.NET 2002 Tag: 73620
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 - Performance of ADO.NET Hello All, We are currently in feasibility study and high level design phase. We need to choose application design according to performance and maintainance. Means our main criteria is Performance and easy Maintainance. We have created one template for just study purpose. 1) Layer That uses Typed DataSet and Stored Procedure In this template, we used Typed Dataset. But somewhere i read that it is maintainable but not giving good performance. Our structure is : Presentation Layer > BAL > DAL > Type Dataset Layer > DL I want information whether this is a good architecture or not. Can anybody suggest me a good architecture with following criteria. Use of Stored Procedure everywhere Performance should be high DAL and BAL Should be there Easy to maintain and programmer friendly :) Give me answers ASAP. Best Regards, and Thank You in Advance. Manish Tag: Problem viewing XML file in VS.NET 2002 Tag: 73619
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 - IBM OleDb for db2 on Win server 2003 gives error.. I've tried to install IBMs OleDb for db2 on iSeries (Client Access) on both Web Edition and Standard Edition. When I try to instantiate from an asp.net app I get the error message: ********* Non-NULL controlling IUnknown was specified, and either the requested interface was not IUnknown, or the provider does not support COM aggregation. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.OleDb.OleDbException: Non-NULL controlling IUnknown was specified, and either the requested interface was not IUnknown, or the provider does not support COM aggregation. ******** Whats this? Any way to make it work? Jon Tag: Problem viewing XML file in VS.NET 2002 Tag: 73618
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 - Cannot edit Databases on other SQL Servers in Visual Studio Server Explorer I am using Visual Studio .Net 2003 Server Explorer to make any changes to my SQL Server 7 Database that is local to my machine. I also have SQL Server 2000 running on my machine and have recently upgraded the database to SQL Server 2000. Unfortunately I don't seem to be able to make any modifications to the SQL Server 2000 database using Server Explorer. I have also connected to other SQL Server 7 and 2000 databases with the Server Explorer and do not have access to modify any of these databases either. I can make adjustments to the SQL Server 2000 database using Enterprise Manager but I really like the Stored Procedure Editor with the "Design SQL Block" that doesn't exist in Enterprise Manager. Thanks Tag: Problem viewing XML file in VS.NET 2002 Tag: 73615
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 - What SQL Statement is being passed? Is there a way to show what values are being passed in an SQL Statement? I can display the commandtext of OleDbInsertCommand1 but it displays the "?" is there a way to show the actual values of the insert statement? Thanks Charlie Tag: Problem viewing XML file in VS.NET 2002 Tag: 73614
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 - OLEDB for FoxPro and SPROCS Is there anyway to call a SPROC using the OLEDB provider for foxPro inside a VB.Net class and then have the ability to reference the column data inside a datareader or datatable? I currently only get a boolean value back when I call a SPROC that executes a simple select statement. HELP PLEASE!! Thanks! Dan Tag: Problem viewing XML file in VS.NET 2002 Tag: 73613
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 - ADO .net in production environment Hello: I just started looking into ADO .net, and I wonder if it works well in production environment. One of the questions I have is working with multiple tables with ADO .net; that these tables are related. If there are update, insert, delete to the dataset returned from the database. When sending the modified data back to the database, is ADO .net automatically takes care of all the relationship and makes updates in all tables involved? Thanks. Quin Tag: Problem viewing XML file in VS.NET 2002 Tag: 73611
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 - One bound form, two functions..help please Hi, I'm planing to have a form with 10 bound textboxes to a dataset throgh the currency manager and bindingcontext. What I need to do is use that same form based on the user choice. He/she could first press a button to fill-out all textboxes from dataset and do normal navigation through all records in the dataset, OR he/she could enter a search criteria in the first textbox (txtEmployee ID), press the same button to search and get that specific record only. I don't have any problem with the first case (press the button to get records and navigate), the problem is when the button is pressed for search, how can I search the dataset???? Correct me if i'm wrong, I'm planing to clear the binding property of all textboes and clear thier TEXT property. The question is How to search for that specific record based on the field enter in the textbox(which the choice to search) MTIA, Grawsha Tag: Problem viewing XML file in VS.NET 2002 Tag: 73605
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 - XSD for existing XML structure. I have an xml file that is currently being used ... I need to make the xsd file for it for intellisense to work in the .net ide. So, when I try to do the xsd file, it keeps giving me an error about the tables being nested and are wrong...so after looking and sifting through google, I'll try here as well :) <store id="WalStore"> <product id="Paint1"> <product id="Paint3"></product> <product id="Paint4"> <product id="Paint5"></product> <product id="Paint6"></product> </product> <product id="Paint7"></product> <product id="Paint8"> <product id="Paint9"></product> <product id="Paint10"> <product id="Paint11"> </product> </product> </product> <product id="Paint2"> <product id="Paint12"></product> </product> </store> So, how can I create the XSD for the above xml? Once I can do that, my problem *should* be solved for my application. Thanks a bunch! Mythran the Pro-g(r)am(m)er Tag: Problem viewing XML file in VS.NET 2002 Tag: 73602
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 - Expression Column doesn't refresh Hi, I have a problem. I have no any clue about this. Please help me to figure it out. I have a Customers table and Orders table. There is a relation,named "Customer2Orders", between Customers (parent table) and Orders (child table) on CustomerID. One Customer may have multiple Orders. I have an expression column 'Total' in Customers table. It is computed based on the child table's column InvoiceAmount, i.e. Total = Sum(Child(Customer2Orders).InvoiceAmount). If I add a child record, Total is computed automatically. But if I delete a child record, Total is not reflected. It still keeps the old value which is wrong. Thanks in advance! Fei Tag: Problem viewing XML file in VS.NET 2002 Tag: 73598
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 - need XML help with nested tables Hi- I need to develop an FAQ section for our website. We would like to break up the FAQ by products, then categories with each category having n question/answer pairs. I would like to pass parameters in the querystring based on what the product/category the user selected, then populate a datagrid with the correct set of question/answer I am pretty new to XML, but basically I made something like this: <products> <product> <name>prod1</name> <partNum>prod1</partNum> <categories> <category> <name>basic category</name> <faqs> <faq> <question>This is a sample question</question> <answer>this is the answer</answer> </faq> </faqs> </category> </categories> </product> <product> <name>prod2</name> <partNum>prod2</partNum> <categories> <category> <name>basic something or something category</name> <faqs> <faq> <question>This is another question</question> <answer>and this is another answer</answer> </faq> </faqs> </category> </categories> </product> </products> So, then I use a DataSet and the ReadXML() method, this result in 5 tables. I was hoping that it would somehow be nested for me, but the way it is right now I can't see an easy way to use it the way I want. the first table lists the products(good) the second table I can't really tell what is in there third tables has all the categories, so on and so on. What is confusing is... what is the point of structuring data hierarchically in XML file if you can't maintain it? I'm sure you can, but how? Is what I'm doing not common? Someone please shed a little light on this for me, I would appreciate it!! Thanks, Steve Tag: Problem viewing XML file in VS.NET 2002 Tag: 73597
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 - Adding a record using C# This is a multi-part message in MIME format. ------=_NextPart_000_0028_01C3BA8B.EDE71230 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Can someone tell me what is wrong with this code? I am simply trying to = add a record to a database. The error message is as follows: An unhandled exception of type 'System.InvalidOperationException' = occurred in system.data.dll Additional information: Update unable to find TableMapping['Table'] or = DataTable 'Table'. ************************************************************** DataSet ds =3D new DataSet(); ds.Tables.Add("FundData"); // Create Access objects:=20 System.Data.OleDb.OleDbCommand cmd1 =3D new = System.Data.OleDb.OleDbCommand("SELECT * FROM FundData", dbConn); System.Data.OleDb.OleDbDataAdapter AdpFunds =3D new = System.Data.OleDb.OleDbDataAdapter(cmd1); AdpFunds.Fill(ds, "FundData"); DataRow dr =3D ds.Tables["FundData"].NewRow(); dr["Symbol"] =3D sym; ds.Tables["FundData"].Rows.Add(dr); ds.AcceptChanges(); AdpFunds.Update(ds); ------=_NextPart_000_0028_01C3BA8B.EDE71230 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 6.00.2800.1276" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV> Can someone tell me what is wrong with this = code?  I am=20 simply trying to add a record to a database.  The error message is = as=20 follows: An unhandled exception of type=20 'System.InvalidOperationException' occurred in = system.data.dll Additional information: Update unable to find=20 TableMapping['Table'] or DataTable 'Table'. <FONT=20 face=3DArial>************************************************************= ** DataSet ds =3D new=20 DataSet(); ds.Tables.Add("FundData"); // Create Access objects: = <FONT=20 size=3D2> System.Data.OleDb.OleDbCommand cmd1 =3D new = System.Data.OleDb.OleDbCommand("SELECT * FROM=20 FundData", dbConn); System.Data.OleDb.OleDbDataAdapter AdpFunds =3D new = System.Data.OleDb.OleDbDataAdapter(cmd1); AdpFunds.Fill(ds, "FundData"); DataRow dr =3D ds.Tables["FundData"].NewRow(); dr["Symbol"] =3D sym; ds.Tables["FundData"].Rows.Add(dr); ds.AcceptChanges(); AdpFunds.Update(ds);</DIV></BODY></HTML> ------=_NextPart_000_0028_01C3BA8B.EDE71230-- Tag: Problem viewing XML file in VS.NET 2002 Tag: 73595
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 - Error in stored procedure Hi, I just wanted to ask what is wrong with this stored procedure. i keep getting the following error message: ADO error: The column prefix 'dbo' does not match with a table name or alias name used in the query. ALTER PROCEDURE dbo.SPSelEquipBooked2 (@Arrival datetime, @Departure datetime) AS SELECT dbo.Equip_Inv_No FROM dbo.Equipment_Inv WHERE dbo.equipment_Inv.Equipment_Inv_No Not In( SELECT dbo.Equipment_Inv.Equip_Inv_No FROM dbo.Equipment_Booking INNER JOIN dbo.Equipment_Inv ON dbo.Equipment_Booking.Equip_Inv_No = dbo.Equipment_Inv.Equip_Inv_No INNER JOIN dbo.Caravan_booking ON dbo.Equipment_Booking.BookingNo = dbo.Caravan_booking.BookingNo AND dbo.Equipment_Booking.Caravan_Inv_No = dbo.Caravan_booking.Caravan_Inv_No INNER JOIN dbo.Booking_Details ON dbo.Caravan_booking.BookingNo = dbo.Booking_Details.BookingNo WHERE (dbo.Booking_Details.Dt_of_departure >= @Arrival) AND (dbo.Booking_Details.Dt_of_arrival <= @Departure)) thx in advance Tag: Problem viewing XML file in VS.NET 2002 Tag: 73591
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 - Question about nested transaction in ADO.NET I am using SQL Server 2000 as data storage I have a transaction which has the following structure connection.begintran Process A Process B Process C connection.commit rollback when failed In each process(A, B, C), there will also be BeginTran, Commit & Rollback inside it. I have such structure because process A, B, C are methods provided by different object. I have found that when I failed in process B, A will not be rollback... So how can I implement a nested transaction? Thanks Tag: Problem viewing XML file in VS.NET 2002 Tag: 73583
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 - read an output parameter from a stored procedure by its name? hi. I cannot retrieve an output parameter from a stored procedure by name. Is this correct? Works not: [ sParamValue = mycmd.Parameters["@ID"].Value.ToString(); ] Works fine: [ sParamValue = mycmd.Parameters[0].Value.ToString(); ] TIA /OF Tag: Problem viewing XML file in VS.NET 2002 Tag: 73578
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 - Datagrid - upgrade / save new rows I have an ADO.NET connection to an Access 2000 DB with 1 table. I have a Data Grid that shows me all records when I open the Data Grid. In the program it shall be possible to add rows to the table directly in the grid, by adding rows. Have tried to code this, but the result is only an empty new row. The information in the row is lost. Can anybody help? I have OleDgDataAdapter called 'da', OleDbConnection called 'cn', a dataset called 'ds1'. NSR Tag: Problem viewing XML file in VS.NET 2002 Tag: 73572
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 - Reading text file using ADO.net This is a multi-part message in MIME format. ------=_NextPart_000_01AA_01C3BAA0.55E26560 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hope somebody can help... I'm trying to load up a text file using ADO.net, as follows: Dim TextConnectionString As String TextConnectionString =3D "Provider=3DMicrosoft.Jet.OLEDB.4.0;" & _ "Data Source=3D" & FilePath & ";" & _ "Extended Properties=3D""Text;HDR=3DNO;FORMAT=3DDelimited""" Dim TextConn As New = System.Data.OleDb.OleDbConnection(TextConnectionString) TextConn.Open() Dim da As New System.Data.OleDb.OleDbDataAdapter("Select * from " & = filename, TextConn) Dim ds As DataSet =3D New DataSet("CSVFiles") da.Fill(ds, filename) When I run this, it fails at the "fill" statement with the error = "Database or object is read only". The file in question can definitely be read and written (it's a short = CSV file). What have I done wrong??? Many thanks in advance. Simon ------=_NextPart_000_01AA_01C3BAA0.55E26560 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 6.00.2800.1276" name=3DGENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV>Hope somebody can help...</DIV> <DIV> I'm trying=20 to load up a text file using ADO.net, as follows: <FONT=20 size=3D2>Dim TextConnectionString As=20 String TextConnectionString =3D "Provider=3DMicrosoft.Jet.OLEDB.4.0;" = &=20 _ "Data Source=3D" & FilePath & ";" & _ "Extended=20 Properties=3D""Text;HDR=3DNO;FORMAT=3DDelimited""" Dim TextConn As = New=20 System.Data.OleDb.OleDbConnection(TextConnectionString) TextConn.Open(= ) Dim=20 da As New System.Data.OleDb.OleDbDataAdapter("Select * from " & = filename,=20 TextConn) Dim ds As DataSet =3D New = DataSet("CSVFiles") da.Fill(ds,=20 filename) When I run this, it fails at the "fill" = statement=20 with the error  "Database or object is read only". The = file in=20 question can definitely be read and written (it's a short=20 CSV file).     What have I done = wrong??? Many=20 thanks in=20 advance. Simon </DIV></BO= DY></HTML> ------=_NextPart_000_01AA_01C3BAA0.55E26560-- Tag: Problem viewing XML file in VS.NET 2002 Tag: 73570
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 - sqlCommand.ExecuteScalar return value 'undefined value' How can that be? Isn't it supposed to return dbnull if there is nothing in the select? Ronen Tag: Problem viewing XML file in VS.NET 2002 Tag: 73564
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 - Queries Hi, I am new to ADO and still have a lot to learn from you. In Access, I used to have make queries (sometimes based on other queries) and display them in a form. In ADO.NET, there is a dataset. But I could not figure out how to do this. Is there any examples I can get? Tag: Problem viewing XML file in VS.NET 2002 Tag: 73563
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 - Error whne dragging table to dataset Hi When I drag a table onto a dataset from the server explorer I get a Data Adapter Configuration Error...'Error in SELECT clause: expression near "".....'. How can I fix this? I am using FoxPro tables. Thanks Regards Tag: Problem viewing XML file in VS.NET 2002 Tag: 73562
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 - Help with DataTable update (BeginLoadData method) I have an ASP.NET/VB app that updates values in a DataTable over the course of about 3 different pages. On the way out of the first of these pages, I explicitly build the DataTable from values in a DataGrid, and set the PrimaryKey of the DataTable to be the first cell in the grid (which is a UserID value). I then store the DataTable in a session object, from which it is retrieved for subsequent pages. All this seems to be working fine. On the second page, I retrieve the DataTable from the session object, apply a filter to it, and display the filtered data in a DataGrid. In this grid, the user can change the data, specifically assigning an employee to a different supervisor. The Grid is populated with the current employee/supervisor assignment in the database, and then any necessary changes are made by the user. This, too, seems to be working fine. The problem I'm having is that on the update command of the Grid, which is where I'm updating the DataTable (the thought being that I would just do an "in-place" update of the DataTable and then rebind the grid). I am able to trap the new assignment values (which are set in a listbox within the grid) and can trap the employee ID value from the grid (which is my primary key), but whenever I call the LoadDataRow method, rather than updating the row based on the primary key, a new row insert is *attempted*. I say attempted because I get an error on the EndLoadData method, which I believe is due to not passing in values for all the columns. I was hoping to be able to just pass in the key value and the values of the columns that had changed, but apparently that is not sufficient. Which is the first question - when attempting a LoadDataRow call, do I need to pass in valid values for *all* of the columns in the datatable (except, of course, those for which there are default values, of which I have none in this instance). You'll see in my example code that I'm just passing in the first, eighth and ninth columns, which I suspect is the problem. However, the *real* question is why isn't the LoadDataRow method finding the pre-existence of the key value in the table? I've checked and the value returned by my code is exactly the same as the one in the table, length is the same, etc. I set the primary key when I first build the table on the previous page, but I thought perhaps that attribute somehow gets lots when I set the DataTable to a session object so, as you will see in the example, I explicitly set the primary key again on this page, which seems to work, but the code still inserts a new row (or attempts to). Here is the relevant code from the page in question: Dim DDL As DropDownList = CType(e.Item.Cells(2).Controls(1), DropDownList) Dim NewID As Integer = DDL.SelectedIndex Dim SupervisorID As String = DDL.Items(NewID).Value Dim SupervisorName As String = DDL.Items(NewID).Text Dim NewRow(9) As Object Dim Key As TextBox = e.Item.Cells(1).Controls(0) Dim RowID As String = Key.Text Dim dsTechnicianList As DataTable dsTechnicianList = CType(HttpContext.Current.Session("ILApplicators"), System.Data.DataTable) Dim dcFirst As DataColumn = dsTechnicianList.Columns(0) Dim dcPrimary(1) As DataColumn dcPrimary(0) = dcFirst dsTechnicianList.PrimaryKey = dcPrimary NewRow(0) = RowID NewRow(7) = SupervisorName NewRow(8) = SupervisorID Dim myRow As DataRow dsTechnicianList.BeginLoadData() myRow = dsTechnicianList.LoadDataRow(NewRow, True) dsTechnicianList.EndLoadData() Any help or ideas would be GREATLY appreciated! TIA, Mike Tag: Problem viewing XML file in VS.NET 2002 Tag: 73561
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 - Rollback Transaction Timing Out Framework 1.0 SQL Server 2000 After aborting a long (around 10 minutes) and with numerous updates, the Rollback function will raise an exception giving the message: System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. -- at System.Data.SqlClient.SqlTransaction.Rollback() If the transaction is not aborted, ie the Commit function is called, a timeout does not occur. In extracts from source below the timeout is set to 0 (for ever). Does anyone have experience of the Rollback timing out? ...... addCon = new System.Data.SqlClient.SqlConnection(); ...... System.Data.SqlClient.SqlCommand addCom = new System.Data.SqlClient.SqlCommand(); Try { ..... addCom.Connection = addCon; addCom.CommandTimeout = 0; //go on for ever addCon.Open(); //Start Transaction addCom.Transaction = addCon.BeginTransaction(); transactionStarted = true; ....... catch(Exception e) { ImportController.errorLevel = errorLevelMajorError; Audit("ERROR: Update PDS " + e.ToString()); if (transactionStarted) { errorLevelTransactionRolledBack = errorLevelTransactionRolledBack; addCom.Transaction.Rollback(); <<--- Times out here } addCon.Close(); addCom.Dispose(); } Thanks in advance Tag: Problem viewing XML file in VS.NET 2002 Tag: 73559
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 - Append 1 Datatable to another (same schema)?? I have several datatables that are of the identical schema, each holding different data. There are times when it would be nice to combine the data from two datatables into one datatable. Would prefer not having to do this through looping. What would be the best way to do this? Tag: Problem viewing XML file in VS.NET 2002 Tag: 73556
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 - Refilling table Hi I have several tables in a dataset. How can I reread the data from underlying database in only one of the tables? Thanks Regards Tag: Problem viewing XML file in VS.NET 2002 Tag: 73555
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 - User Defined Sql Function and ADO.Net Hi all, Does anyone know the syntax for returning a value from a user defined function in Sql Server using VB.Net. Each time I do it I get: invalid object name We have a function which takes one parameter and returns a table. I can find little or no documents directly addressing this subject. Thanks in advance, Bill Tag: Problem viewing XML file in VS.NET 2002 Tag: 73554
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 - Multiple Access Databases I want to redo my Forms in VB.NET. Now when I go and test my Forms to make sure they work I want to set up a second ACCESS file as a test database. When everything works and I want to switch over to my Production database how would I do that? Would I have to go into all my VB forms and redo my ADO links or is there an easier way? Tag: Problem viewing XML file in VS.NET 2002 Tag: 73551
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 - OleDB returning DBNull for certain cells Hi, I'm using OleDBConnection to read data from Excel. I'm able to read everything except when a cell has numeric value and the column has alphanumeric data. I get DBNull when it encounters a numeric value. I'm sure many people have seen this. Does anyone know how to address this issue? Thanks, Paul Tag: Problem viewing XML file in VS.NET 2002 Tag: 73550
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 - Can Sql Server 7 be used with ADO.Net? Does ADO.Net work with SQL Server 7 or is it only compatible with SQL Server 2000? Thanks in advance Chris Pearce Tag: Problem viewing XML file in VS.NET 2002 Tag: 73546
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 - OleDB troubles reading Excel spreadsheet I'm trying to use an OleDbConnection to read some data from an Excel Spreadsheet. I create my connection string, and open the connection, but when i query the sheet/table i get the error that OleDb could not find the sheet. I've now tried to get a list of the sheets (to see if i was using the wrong sheet name or something) but my list of sheets comes back with 0 entries. Any Help! this spreadsheet DOES have 2 sheets inside it... What am i not doing? Are there any good examples/resources out there for reading Excel in this way? Private _connectionString as String Dim rs As OleDbDataReader Dim cmd As New OleDbCommand Dim query As String Dim table As String Dim lookup As DataTable 'I build my connection string newConnectionStr.Append("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=") newConnectionStr.Append(fileName) newConnectionStr.Append(";Extended Properties=Excel 8.0;") _connectionString = newConnectionStr.ToString 'I open my connection and attempt to see what sheets are available _connection.Open() lookup = _connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, Nothing) If lookup.Rows.Count > 0 Then table = CStr(lookup.Rows(0)("TABLE_NAME")) End If _connection.Close() _connection.Dispose() This returns me nothing, 0 rows end up in 'lookup'. If i try and run the query "Select * FROM [$Sheet 1$]" I get the "not able to find" error. Help? Thanks! jeffpriz Tag: Problem viewing XML file in VS.NET 2002 Tag: 73543
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 - Programmatic access to control in DataGrid HeaderTemplate FindControls does not work for a server control in a DataGrid HeaderTemplate. Doing the following: <DataGridName>.FindControl("<controlId>") This brings back null for a HtmlInputCheckBox or a CheckBox Web control. How do you programmatically access a server control in the header of an DataGrid? Or can you? Thanks, Tommy. Tag: Problem viewing XML file in VS.NET 2002 Tag: 73541
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 - DataBinding Format Question I am using the following code to apply the databinding format for Date (04/12/2003) **********************CODE***************************** Private WithEvents DateBinding As Binding DateBinding = New Binding("Text", Me.DsReport1, _ "Report.Date") Me.RichTextBox.DataBindings.Add(DateBinding) Sub Format(ByVal sender As Object, ByVal e As ConvertEventArgs) Handles _ DateBinding.Format Dim dt As DateTime = CType(e.Value, DateTime) e.Value = dt.ToString("dd/MM/yyyy") End Sub ********************************************************* It works perfectly but every time I load the form on design mode, the following messages appear: "The variable DateBinding is not declared or it was not assigned never" "The type System.Windows.Forms.Form does not have a field named DateBinding" Now, this can't be right and I sure don't want to leave it like that but I can't figure it out. Any recommendations please? Thanks! Tag: Problem viewing XML file in VS.NET 2002 Tag: 73539
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 - FIND like old ADO method Is there any kind of FIND in ADO.NET that works the same way as the old ADO Recordset FIND? The old ADO Find would accept a criteria string, and then find the first record that matches the criteria. For instance, rs.Find("text_value like '* | *') would position me on the first record that contained a bar (' | '). It didn't filter anything, but just positioned the database at that record (or, in ADO.NET, would give me the row index of the first record matching this criteria). I see SELECT on a datatable and ROWFILTER on a dataview, but these all filter... I simply want to find the first record matching this criteria. I can probably get around it by simply reading all the records and programatically searching for the first one that matchs, but was hoping for a built-in solution. Thanks in advance. Tom Tag: Problem viewing XML file in VS.NET 2002 Tag: 73535
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 - Using SqlCommandBuilder with Transactions Hi, i have a DataSet with 3 Tables. For each table i have defined a SqlDataAdapter Object. The SqlCommands for Deleting, Inserting und Updating were created by the SqlCommandBuider Object. I have wrote the following Code, to write the Content DataSet. public void WriteData() { SqlCommandBuilder buildCmd1; SqlCommandBuilder buildCmd2; SqlCommandBuilder buildCmd3; buildCmd1 = new SqlCommandBuilder(this.adapter1); buildCmd2 = new SqlCommandBuilder(this.adapter2); buildCmd3 = new SqlCommandBuilder(this.adapter3); this.sqlConn.Open(); this.adapter1.Update(this.dataSet, table1); this.adapter2.Update(this.dataSet, table2); this.adapter3.Update(this.dataSet, table3); this.sqlConn.Close(); } Now i want to encapsulate the three Updates in one Transaction? How can i assign the dynamic generated SqlCommand Objects to a SqlTransaction Object? Thanks Andreas Tag: Problem viewing XML file in VS.NET 2002 Tag: 73524
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 - Datareader and Getint32 does not work Using VS.2003 and ODBC I make a SELECT count(*) from table1. with ExecuteSQLSelect This must return always !!! a number-value . But if I try to read from the datareader with GetInt32 a get always a inValid cast operation exception . Only Getstring(0) works fine. Is there any solution for this behavior ??? Thanks for any help Peter *** Sent via Developersdex http://www.developersdex.com *** Don't just participate in USENET...get rewarded for it! Tag: Problem viewing XML file in VS.NET 2002 Tag: 73520

I have an XML file (data and schema) created programatically from a
DataTable. I need to open this file in VS.NET and view it in the data view
(grid view). When I open the file the first time, this works perfectly well.
However, once I close it (no edits) and try to open again, VS gives an error
as follows:

"Although this XML document is well formed, it contains structure that Data
View cannot display. Column requires a valid Data Type."

The weird thing is that this still happens even when I make the newly
created file read only. It opens in Data View the first time, then it it
fails after that. I don't see how the file could change given that it is
read only.

BTW, all columns are typed. Some are typed as enums we have defined. But if
this was a problem, it seems the file wouldn't open in Data View even once.
It opens fine the first time. I can regenerate the same file, and it again
opens fine the first time it is opened. Also, I set the read only property
immediately (before the file is ever opened.)

Anyone have any ideas what is causing this?

Thanks!

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