Power raising in a datacolumn expression

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  - 1
    - DataGrid with Master-Detail DataSet I have a DataSet with two tables which are in a master-detail relationship. How do I show a detail table in datagrid and some columns from a master table. (Ex.: Orders and a customer name for every order comes from a Customers table). Tag: Power raising in a datacolumn expression Tag: 109749
  - 2
    - Problems with XML, XSD, Web, Services & InfoPath Hi all, Have been playing about with web services but unable to achieve what I am wanting and in attempts finding strange problems. I have created a web service for retrieving customer data and for updating the data using datasets. I have created a XML schema. I decided to use InfoPath for testing things out. Works great for getting the data. The data table on SQL Server 2000 allows nulls. If I was to change this I would have to split my customers into 2 tables. The table allows customer details to be stored as an individual or organisation. As a result some fields don't require any values so I have allowed nulls. When I come to update the data on InfoPath I can't edit the fields that contain nulls and the update fails because InfoPath only sends fields in the XML that do not contain null values. My thought of the way round this was to set minOccurs and maxOccurs to 1, I have also marked the elements with default values and set nill to true. When I test the web service method on the server minOccurs is set at 0 but the XML schema shows as 1. The Schema file is publicly available and this shows correct. Any ideas folks? Tag: Power raising in a datacolumn expression Tag: 109747
  - 3
    - Date Format Problem - SQL Server Insert From Web Application Hi, I've written a short aspx file so that end users can insert lines into our SQL server database. The following string is sent by Internet Explorer to the database where it updates the relevant table - INSERT INTO Tbl_Manual([Data Date],[Staff ID], Flag1, Flag2, Flag3, Ref1, Ref2, Timestamp, Inputter) values('15/05/2005', '89', '1', '0', '0', '77', '8', '01/05/2005 08:54:10', 'HOME\username') The 2nd date is sent as a string into an nvarchar field so it causes no problems but the first (which is heading for a datetime field) is assumed by SQL to be MM/dd/yyyy format no matter what I try to do. All regional settings are set to UK English & the table in SQL correctly uses dd/MM/yyyy format so the above insert command fails thinking that I'm trying to add a date of the 5th of month 15. If I try input a date as mm/dd/yyyy format into the aspx page, an error is thrown back. Any ideas as to what's going wrong ? Thanks Steve Tag: Power raising in a datacolumn expression Tag: 109738
  - 4
    - Advice on "converting" one DataTable to a different structure? Hi everyone-- I have a one-row DataTable that I need to manipulate. It consists of a series of three columns of related information. All the columns are strings. For example-- Col1 Col1Descrip Col1Value Col2 Col2Description Col3Value <etc> "AUTHOR" "email author" "John" "CC" "the copyee" "Rebecca" What I'd like to do is "pivot" the table, so to speak, so that it only has three columns; one for the field name, the field description, and the value. The single row I have now would be broken into separate rows of three columns each. Again, here's an example of what I'd like see in the end: NewCol NewColDescrip NewColValue "AUTHOR" "email author" "John" "CC" "the copyee" "Rebecca" Is there an optimal way of doing this? I suppose I could create a new DataTable with three columns, then walk through the original DataRow and build a new row every three columns along....it just sounds a little kludgey. I don't know, but I thought I'd ask if there were another, better way to do it. Thanks for the advice. Tag: Power raising in a datacolumn expression Tag: 109728
  - 5
    - Double lock on iseries db2 ado.net transaction I'm seeing some odd locking behavior when using an DB2400 database and running an ado.net transaction. My code -- in simplified form, appears at the bottom. I want to run several INSERT statements using the same iDB2Connection and iDB2Command. Then I want to Commit() so that either all the data goes in, or not. What happens though is this: 1. After the first INSERT, a lock appears on the FILE 2. After the second INSERT, another lock appears on the FILE. 3. I can then add several more records, and no more locks appears 4. After the Commit(), one lock disappears but not the other. I have run the code with every available IsolationLevel, including the default, and the result is the same. My questions are: 1. Where could this second lock come from? 2. Why does Commit() not remove it? 3. What additional properties or commands do I need to account for to remove this lock? 4. I have read that there may be a journaling property that sets up an 'autocommit/rollback' in the event of a system crash -- could this be what's causing it? using System; using IBM.Data.DB2.iSeries; using System.Data; using System.Diagnostics; namespace simpleTtest { /// <summary> /// Summary description for Class1. /// </summary> class Class1 { /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main(string[] args) { // // TODO: Add code to start application here string connStr= "Data Source=192.168.NNN.NNN;User Id=XXXXXX;Password=XXXXX;Default Collection=DataLibrary;"; iDB2Connection p_iconn = new iDB2Connection(connStr); iDB2Transaction itrans=null; iDB2Command icmd=new iDB2Command("INSERT INTO " + "$MANINV.PEM610WD"+ "(" + "W1BATCH)" + "VALUES('100')", p_iconn); p_iconn.Open(); itrans = p_iconn.BeginTransaction( IsolationLevel.RepeatableRead ); icmd.Transaction=itrans; try { icmd.ExecuteNonQuery(); //after this statement a lock is generated icmd.ExecuteNonQuery(); //after this statement a second lock appears icmd.ExecuteNonQuery(); //no more locks; there are still two(2) at this point itrans.Commit(); // after commit, one lock is removed -- one remains! why...? } catch(Exception e) { Debug.WriteLine(e.ToString()); itrans.Rollback(); } finally { p_iconn.Close(); } } } } -- Texeme Construct http://texeme.com Tag: Power raising in a datacolumn expression Tag: 109727
  - 6
    - Re: Using ms access how do I set column that can be of zero length TIA Sorry , I should have made it clear, how do I do it in code. Thanks. Tag: Power raising in a datacolumn expression Tag: 109725
  - 7
    - Importing existing data Hi vs2005 beta2. I have created a sql server data file from within vs. Is there any way to import existing access tables & data into the sql server datafile? I have tried installed sql server 2004 developer from msdn but did not see any enterprise manager type tools that come with sql server 2000. What am I missing? Thanks Regards Tag: Power raising in a datacolumn expression Tag: 109723
  - 8
    - IDataReader Read() method question Hello All! I am going to crazy and feeling myself so stupid but I don't understand such behavior. I have code: public int getNextAgentId() { Int32 agent_id = 0; IDataReader dr = dbap.DBDataReader("SELECT MAX(agent_id) FROM Agents"); if(dr.Read()) { agent_id = dr.GetInt32(0); } dr.Close(); return agent_id + 1; } where dbap is an instance of DB abstraction class, hence using IDataReader interface instead of concrete DB DataReader such as SqlDataReader. SELECT returns null due to database table is empty and I have error message "Data is Null. This method or property cannot be called on Null values." on line agent_id = dr.GetInt32(0); As I understand in the beginning datareader positioned before first record and when I call Read method it should point to first record but why it returns true in conditions when now rows returned from DB? Any ideas? Thanks in advance to all. Below my code of abstraction class (dbap is instance of DBAbstractionProcessor class): public class DBAbstractionProcessor { // implemented DB provider types public enum DbType { SQLServer, OLEDb, ODBC }; private DbType dbtype; private AbstractDBFactory dbf; public DBAbstractionProcessor(DbType db_type) { this.dbtype = db_type; } private void selectDbType() { switch(this.dbtype) { case DbType.SQLServer: this.dbf = new SQLServerDb(); break; case DbType.ODBC: this.dbf = new OdbcDb(); break; case DbType.OLEDb: this.dbf = new OleDb(); break; } } public void init(string dburl) { this.selectDbType(); this.dbf.init(dburl); } public void init(string dburl, string user, string passwd) { this.selectDbType(); this.dbf.init(dburl,user, passwd); } public void connect() { dbf.connect(); } public void disconnect() { dbf.disconnect(); } public DataSet DBAPSelectQuery(string cmd) { return this.dbf.DBSelectQuery(cmd); } public void DBAPInsertQuery(string cmd) { this.dbf.DBInsertQuery(cmd); } public IDataReader DBDataReader(string query) { return this.dbf.DBDataReader(query); } } Factory class which implements factory design pattern: /// <summary> /// Factory Design Patterns implementation. /// At the present time abstraction if MS SQL Server, ODBC and OLEDB /// interfaces implemented. In case of neccessety, any other interfaces /// can be easily implemented. /// </summary> public abstract class AbstractDBFactory { // database url string protected string url = null; // database username protected string username = null; // database password protected string password = null; // simple initialize by url public void init(string dburl) { if(dburl == null) { throw(new ArgumentException("Illigal agruments")); } this.url = dburl; } // full initialize public void init(string dburl, string user, string pass) { this.init(dburl); this.username = user; this.password = pass; } // clear all settings public void destroy() { this.url = null; this.username = null; this.password = null; } // abstract methods which implemented by SQLServerDb, OdbcDb and OleDb classes abstract public void connect(); abstract public void disconnect(); abstract public DataSet DBSelectQuery(string cmd); abstract public void DBInsertQuery(string cmd); abstract public IDataReader DBDataReader(string cmd); } And SQL Server implementation: /// <summary> /// MS SQL Server interface implementation. /// </summary> public class SQLServerDb : AbstractDBFactory { // connector private SqlConnection sqlCon; public override void connect() { // if base class which stores url, username and passwords not initilized // throw exception if(base.url == null) { throw(new ApplicationException("Class is not initialized. Please run init() first.")); } else { //Disable pooling for sql server if(base.url.IndexOf("Pooling") == -1) { base.url += ";Pooling=false"; } // if username and password properties exists initilize by them otherwise by url if(base.username != null && base.password != null) { this.sqlCon = new SqlConnection(base.url + ";uid=" + base.username + ";pwd=" + base.password); LoggingProcessor.Info("url uid pwd init"); } else { this.sqlCon = new SqlConnection(base.url); LoggingProcessor.Info("url - " + base.url); } try { sqlCon.Open(); } catch (Exception e) { throw new Exception("SQL Server error: " + e.ToString()); } LoggingProcessor.Info("sql server connection established"); } } // simple select query // returns DataSet public override DataSet DBSelectQuery(string cmd) { DataSet ds = new DataSet(); try { if(this.sqlCon.State == ConnectionState.Closed) { this.connect(); } SqlDataAdapter sqlDA = new SqlDataAdapter(); sqlDA.SelectCommand = new SqlCommand(cmd, sqlCon); sqlDA.Fill(ds); } catch (Exception e) { throw new Exception("SQL Server error: " + e.ToString()); } finally { sqlCon.Close(); } return ds; } // simple insert query public override void DBInsertQuery(string cmd) { try { if(this.sqlCon.State == ConnectionState.Closed) { this.connect(); } SqlCommand sqlCmd = new SqlCommand(cmd, this.sqlCon); sqlCmd.Prepare(); sqlCmd.ExecuteNonQuery(); } catch (Exception e) { throw new Exception("SQL Server error: " + e.ToString()); } } // DBDataReader - provides selection and returns SqlDataReader public override IDataReader DBDataReader(string cmd) { try { if(this.sqlCon.State == ConnectionState.Closed) { this.connect(); LoggingProcessor.Info("connection is not initialized. initializing..."); } SqlCommand sqlCmd = new SqlCommand(cmd, this.sqlCon); LoggingProcessor.Info(cmd); //sqlCmd.Prepare(); return sqlCmd.ExecuteReader(); } catch (Exception e) { throw new Exception("SQL Server error: " + e.ToString()); } } // disconnect public override void disconnect() { if(sqlCon.State != ConnectionState.Closed) { try { this.sqlCon.Close(); } catch (Exception e) { throw new Exception("SQL Server error: " + e.ToString()); } } } } Best regards, /Gelios Tag: Power raising in a datacolumn expression Tag: 109719
  - 9
    - Opening from Excel into a dataset, issue with mixed datatypes I have an excel sheet with a column of mixed data types, i.e., numeric & text. ADO.NET is scanning the first few rows and deciding on numeric so when we come across text, the data becomes blank. That being the case I set the extended properties setting to include IMEX=1 but this seems to be of no help. Below is the stripped out code of what I am attempting to do. Thank you for your help. string sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + Server.MapPath("~/Output/myData.xls") + ";" + "Extended Properties=\"Excel 8.0;IMEX=1;HDR=NO;\""; OleDbConnection oleCon = new OleDbConnection(); oleCon.ConnectionString = sConnectionString; oleCon.Open(); OleDbCommand objCmdSelect =new OleDbCommand("SELECT * FROM [2005$A5:A133]", oleCon); OleDbDataAdapter objAdapter1 = new OleDbDataAdapter(); objAdapter1.SelectCommand = objCmdSelect; DataSet objDataset1 = new DataSet(); objAdapter1.Fill(objDataset1); DataGrid1.DataSource = objDataset1.Tables[0]; DataGrid1.DataBind(); oleCon.Close(); oleCon.Dispose(); Tag: Power raising in a datacolumn expression Tag: 109710
  - 10
    - How the frick do you call a stored procedure when using OdbcDataAdapter?!? And why the frick is it sooo damn hard to find information on this crap, anyway?!? Help! -Skipward Tag: Power raising in a datacolumn expression Tag: 109699
  - 11
    - Scrolling and retrieving rows similar like ado recordset Hi, I working on implementing a scrolling and record navigation with ADO.NET. In ado recordset having builtin caching/paging and record navigation methods. but i could find a similar conecpts in ADO.NET classes.. Am i missing something?? In dataset class i cannot set pagesize/cachesize, so if i execute a query with a large resultsets with dataset all the rows loaded in the memory. so iam not getting any cursor navigation conecpt benefits in ado.net classes??? Hari Tag: Power raising in a datacolumn expression Tag: 109693
  - 12
    - Needing Help Hi, i am trying to make a window application that create graphs (plot data as in excel) for a given set of points, how can i do this? thanx -- Message posted via http://www.dotnetmonster.com Tag: Power raising in a datacolumn expression Tag: 109691
  - 13
    - Bidirectional cursor navigation Hi, Is there any class supports bidirectional cursor in the ADO.NEt framework? I was looking some of the samples and only talks about SqlDataReader (forward only cursor). Or is there any way i can make use of database cursors in my dotnet application to navigate the records from a table.? Hari Tag: Power raising in a datacolumn expression Tag: 109687
  - 14
    - using a dataReader with StoredProc I have an oracle storedProc that takes one input parameter and 15 output parameters. Can I get the results of the output parameters in a datareader or must I add 15 output parameters? thanks john Tag: Power raising in a datacolumn expression Tag: 109682
  - 15
    - How to provide a feedback in accessing the BLOB type data? How to let the user know the progress while accessing BLOB type data? The feedback such as the number of bytes readed/written to database. Regards, ZhangZQ Tag: Power raising in a datacolumn expression Tag: 109679
  - 16
    - Comparing 2 datasets (or datatables) I want to compare two datasets (of 2 datatables). I just need to know whether the 2 datasets are same or different. I do not want to know how it differs. (I would be nice to have though).. Is there any easy way to accompilsh this. Thanks Tag: Power raising in a datacolumn expression Tag: 109673
  - 17
    - stored proc /w Oracle and Ado.Net Can someone help me with a very simple task I am trying to execute a stored procedure in an Oracle database using Ado.Net. The following is a code snippet conn = New OracleConnection(mOracleConnectionString) cmd = New OracleCommand cmd.Connection = conn conn.Open() cmd.CommandType = CommandType.StoredProcedure cmd.CommandText = "TW_USER_TEST3" cmd.ExecuteReader(CommandBehavior.Default) The stored proc does not have any input or output parameters. I created it for testing purposes. I had a stored proc that did have input and output but I was getting errors so I thought to create the simplest store proc. The proc doesn't even do anything. I am getting the following error: >> An unhandled exception of type 'System.Data.OracleClient.OracleException' occurred in system.data.oracleclient.dll Additional information: ORA-06550: line 1, column 7: PLS-00201: identifier 'BRAVO_CL21.TW_USER_TEST3' must be declared ORA-06550: line 1, column 7: PL/SQL: Statement ignored >> The following is the stored proc: >> CREATE OR REPLACE procedure tw_users_test3 as begin null; end; / >> I would appreciate any help thank you John Tag: Power raising in a datacolumn expression Tag: 109669
  - 18
    - ODBCConnection and ASP.NET I have an ODBC connection (to Perforce) using a System DSN. In a console app I can open the connection, in an ASP.Net webform I can't, and get the error... [OdbcException: ERROR [HY000] [ ERROR [HY000] [] I assume it must be permissions? I have tried a few things, firstly making ASPNET (I'm running IIS5) andAdmin user, then giving it permissions to the System DSN registry key, but to no avail. I'm using the 1.1 Framework and the System.Data.Odbc.OdbcConnection object. Anbody got any ideas? Tag: Power raising in a datacolumn expression Tag: 109668
  - 19
    - Continious DataTable.Select without AcceptChanges on every table leaks memory Hi everybody, we had very strange memory usage in our application when continiously updating a dataset. We were able to exactly localize the problem in the datatable.Select method. Each time we check the datatables for changes with Select, there is an internal index build. These indexes are later deleted when you pass the datatable to the dataadapter. But in our code we have a lot of tables in the dataset where we check all for changes and only update the ones with changes. When the changes only occur in the same tables for a long time, the other tables get more and more indexes consuming a lot of memory. The following piece of code demonstrate this behaviour. It generates more than 400Meg on my machine, and it's the Select method doing this! Only a call of the AcceptChanges method clears the memory. If your machine doesn't have that much memory, be careful! We have not examined the problem on .NET SP1, perhaps it is fixed. For me, creating a static index without reusing it anytime looks like a bug. Are there any designguides saying that this is not the right way to use/update datasets? Doesn't anybody work with datasets like that? Any comments on that? Helge ---------------------------------------------------- class Class1 { [STAThread] static void Main(string[] args) { // build a very simple DataSet System.Data.DataSet ds = new DataSet(); System.Data.DataTable table = ds.Tables.Add("Table"); table.Columns.Add(new System.Data.DataColumn("ID", typeof(Guid))); // add some Data to your one table to make the effect more dramatic ;-) for (int i = 0; i< 10000; ++i) { System.Data.DataRow row = table.NewRow(); row["ID"] = Guid.NewGuid(); table.Rows.Add(row); } table.AcceptChanges(); // dump memory before Class1.DumpMemory(); for(int i = 0; i <10000; ++i) { // this simple select (doing nothing) executed 10000 times generates over 400Meg of memory! // And you don't get rid of it with GC.Collect()! table.Select(null,null,DataViewRowState.ModifiedCurrent); } // dump memory after! Suprise! Class1.DumpMemory(); // only if you call AcceptChanges the memory is cleared! ds.AcceptChanges(); Class1.DumpMemory(); } static void DumpMemory() { System.GC.Collect(); System.Console.WriteLine("TotalMemory: " + GC.GetTotalMemory(true).ToString()); } } Tag: Power raising in a datacolumn expression Tag: 109667
  - 20
    - OnRowUpdated, Rollback in DB, ConcurrencyException and RowState question. Please give your opinions. Hello. If you think this post is too long to read please scroll to the bottom and read the last two sentences. Thank you :) I have a problem which I cannot find a good solution to and hopefully I can get some ideas from the readers of this group. I will first describe my environment for you; I have a database without constraints. It has a lot of tables ofcourse and among all of them are two specific tables. Lets call them Customer and CustomerDetails. In the Customer table there are some columns ofcourse and the last column is DetailsId that works as reference to the CustomerDetails table. The column datatype is an int and points out the Id column in the CustomerDetails table. The Id column in CustomerDetails has autoincrement turned on and is the primary key column. In the dataset in the C# application there is a relation between Customer and CustomerDetails (DetailsId in Customer refers to Id in CustomerDetails). Before a Customer has been "opened" for the first time in the Application the CustomerDetails table does not have any entries which is refered to from the Customer row. The DetailsId value of the specific customer is DBNULL. Now, imagine the following scenario: Person A opens up a customer in the application. Automatically a row in CustomerDetails is added and it's Id value is automatically assigned. This value is then, due to the relation between the tables also inserted into the customer row's DetailsId column. Lets say the value is 20 (because there are 19 other entries in CustomerDetails already). Then Person B opens up the same customer in the application. Same thing happens with the CustomerDetails table in the dataset. It gets a new row with Id 20. Person A changes something in the customer row and then saves all changes back to the DB. Everything works fine so far. Person B changes the same value in the customer row and then also tries to save. What happens now is that first the CustomerDetails table in the dataset is saved to the db. When this happens the RowUpdated event triggers and we get a hint that the actual value of Id has changed in the DB so it is now 21 (since 20 was already taken). With the help of the relation between the tables also the DetailsId value in the Customer table is changed to 21. Then some other updates follow, but finally there is a concurrency in the Customer table since both person A and B have tried to changed the very same rowvalues. A rollback is performed in the database. Person B is informed that a concurrenyexception has been thrown and is now given two options. First option is to loose all of his changes due to the concurrency. Second option is to override the data in the database with his specific changes. The person B chooses the second option since he thinks his changes are more important. What happens now is that data is collected from the database into a new dataset. Then this dataset is merged into the first dataset (in which all of person B's changes are). It is merged with the "preserve changes" flag so that all of the changes that person B has made are still there. Since the DetailsId value has been changed in the RowUpdated event to 21 this value is still 21 in both Customer and CustomerDetails. Though, when the new dataset was filled from the database there was already a row in CustomerDetails (with Id value 20). So after the merge the CustomerDetails table now holds two rows. One with Id 20 and one new with Id 21. In the Customer table the row's value is 21 (which is correct). Now, person B saves for the second time to the DB. Now there is no concurrency and everything seemd to work fine. But everything is certainly not fine. The first problem is that no row in the Customer table refers to the row in CustomerDetails which has Id 20. The second problem is that the row in CustomerDetails with Id value 21 is never saved to the DB so the row in the Customer table now refers to a row that does not exist in the DB. The first problem you probably understand why it occured. The second problem is a little more tricky to understand. Atleast it was for me. The thing is that when person B saved to the DB the very first time all of the rows that were saved before the concurrency occured had it's rowstate property changed from added/modified to unchanged. Then the rollback was done in the DB, but the dataset were still "changed". That is why the row in CustomerDetails was not saved when person B saved to the DB the second time. To fix the second problem I have this solution in mind; If I first make a copy of the changes (before person B is saving for the first time) in the dataset with dataset.GetChanges() and use this "copy" when I update the DB. If everything goes fine with the DB update I can merge any changes (that could have been done due to RowUpdated event activity) from the "copy" dataset back to the original dataset. If something goes wrong with the DB update (i.e. if a concurrency exception is being thrown), I will still have the original dataset unchanged with all rowstates. I can then still give person B the option to "override" the concurrency, which means I refresh a new dataset from the DB and merge the changes into it. Then person B tries to save once again. Question now is, what will happen if I implement my solution? What if the DetailsId in person B's dataset is something different from what's already in the DB (say, 22). Will the existing row (21) that person A once saved have it's Id value changed to 22 du to the merge between the newly refreshed dataset and person B's dataset? Or will there just be a new row added (22) to CustomerDetails so that problem 1 occurs (row 21 will be left on it's own with reference from the Customer table) ? I know that this was a quite big post but I felt I needed to explain everything good enough to get good help. I am VERY thankful if you find a working solution for me. Regards, David. Tag: Power raising in a datacolumn expression Tag: 109666
  - 21
    - Require Help Regarding Deployment...... This is a multi-part message in MIME format. ------=_NextPart_000_000A_01C54CB2.5B42EED0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Every Body, I build an application using vb.net. Now i m deploying on the client system. I know that the deployment automatically check the .net framework on the = client system at startup. I include the .net framework in the deployment setup. I want that if the framework is not installed on the client system then = my deployment wizared automatically install the framework which i = include in the deployment package. How can i do this. What are the setttings are needed regarding this. Regards, Muhammad Jamil Nawaz ------=_NextPart_000_000A_01C54CB2.5B42EED0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Diso-8859-1"> <META content=3D"MSHTML 6.00.2900.2604" name=3DGENERATOR> <STYLE></STYLE> </HEAD><FONT face=3DArial><FONT size=3D2> <BODY> <DIV>Hi Every Body,</DIV> <DIV> </DIV> <DIV>I build an application using vb.net.</DIV> <DIV>Now i m deploying on the client system.</DIV> <DIV>I know that the deployment automatically check the .net framework = on the=20 client system at startup.</DIV> <DIV>I include the .net framework in the deployment setup.</DIV> <DIV>I want that if the framework is not installed on the client system = then my=20 deployment wizared automatically install the framework which i include = in the=20 deployment package.</DIV> <DIV> </DIV> <DIV>How can i do this. What are the setttings are needed regarding = this.</DIV> <DIV> </DIV> <DIV>Regards,</DIV> <DIV> </DIV> <DIV>Muhammad Jamil Nawaz</DIV></BODY></HTML></FONT></FONT> ------=_NextPart_000_000A_01C54CB2.5B42EED0-- Tag: Power raising in a datacolumn expression Tag: 109657
  - 22
    - Large jumps in number connections to SQL DB and Connection Pool Not really sure if I have a problem or not...but, I want to try and understand what is going on. With that said, I haven't ruled out that it's a code problem, but I want to post to see if anyone has seen similar behavior. Basically, throughout the day, we may see "large" jump in the number of connections to our SQL DB and a corresponding jump in the connection pool within a short period of time, i.e., 100+ connection increase in 2 to 3 seconds. The number of users during these jumps are steady...that is, we don't have a large increase of end users (it's an internal call center app). Like I said, I haven't ruled out there being some kind of problem in the application that generates the connections, but I just want to try and persue all avenues. Thanks in advance. Tag: Power raising in a datacolumn expression Tag: 109653
  - 23
    - Table Mapping with Typed Dataset I've created a strongly typed DataSet, with a 2 related tables. a couple of the columns in the parent are computed with expressions. One of which is a Sum of a Child.column (Sum(Child.UnitCost). Eitherway, since adding these expressions, I'm getting a InvalidOperationException when I execute the Update method of corresponding DataAdapter on the parent. The column names haven't changed from the underlying data source, a table on sql server. Admittedly, at this point in the execution, the child table has not been filled yet, but that's fine, the expression columns can just stay null at this point. What am I doing wrong? Is it case that all expression columns are not meant to be mapped back, but instead are just for use within the dataset? :O( Tag: Power raising in a datacolumn expression Tag: 109652
  - 24
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  - 25
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- Next
  - 1
    - Finding out ADO.NET version How do i find out what version of ADO.NET is being used in my .NET application. Iam building vc++ application in visual studio.net 2003 (7.1 version) and .NET framework version 1.1. I would like use the new feature of ADO.NET 2.0 and need to know i have the correct ado dll's on my system.? The dlls i have on C:\Program Files\Common Files\System\ado folder is msado15.dll like that, is it 1.x or 2.0 version? Hari Tag: Power raising in a datacolumn expression Tag: 109643
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  - 3
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  - 4
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  - 15
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  - 16
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  - 17
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  - 18
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  - 19
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  - 20
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  - 21
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  - 22
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  - 23
    - Error - Deleted row information cannot be accessed through row I am using a dataset containing Parent/Child tables. When I attempt to delete more than a single row, I get the DeletedRowInaccessibleException error on the second row to be deleted. I cannot figure out why. I have looked at the data just before the failed call (identified by ==>). I have verified that the tblDetail.Select method creates a datarow array with the correct number of rows deleted and the data in those rows represent the rows which I deleted (in a grid). The Insert and Update sql commands work as expected. The snippet follows. I left in the code which helped me verify that the deleted data was correct. The method creating the DataAdapter's DeleteCommand is at the bottom. Thanks for any help, Lars ==================================================== Dim cn As New SqlConnection(ConnectionSettings.cnString) Dim daMaster As New SqlDataAdapter("usp_Master_Sel_All", cn) Dim daDetail As New SqlDataAdapter("usp_MasterDetail_Sel_All", cn) Dim tblMaster As DataTable = ds.Tables(0) Dim tblDetail As DataTable = ds.Tables(1) daMaster.InsertCommand = Me.CreateInsertMaster(cn) daMaster.UpdateCommand = Me.CreateUpdateMaster(cn) daMaster.DeleteCommand = Me.CreateDeleteMaster(cn) daDetail.InsertCommand = Me.CreateInsertDetail(cn) daDetail.UpdateCommand = Me.CreateUpdateDetail(cn) daDetail.DeleteCommand = Me.CreateDeleteDetail(cn) cn.Open() Try ' Submit the only new Master/Detail rows daMaster.Update(tblMaster.Select("", "", DataViewRowState.Added)) daDetail.Update(tblDetail.Select("", "", DataViewRowState.Added)) ' Submit the only modified Master/Detail rows daMaster.Update(tblMaster.Select("", "", DataViewRowState.ModifiedCurrent)) daDetail.Update(tblDetail.Select("", "", DataViewRowState.ModifiedCurrent)) ' Submit only deleted Detail then Master rows Dim strx As String Dim dr() As DataRow = tblDetail.Select("", "", DataViewRowState.Deleted) Dim num As Integer = dr.Length() For Each rw As DataRow In dr For Each col As DataColumn In tblDetail.Columns If Not rw.IsNull(col, DataRowVersion.Original) Then strx = rw.Item(col, DataRowVersion.Original) End If Next Next ==>daDetail.Update(tblDetail.Select("", "", DataViewRowState.Deleted)) daMaster.Update(tblMaster.Select("", "", DataViewRowState.Deleted)) Catch ex As SqlException MessageBox.Show(Exceptions.HandleError(ex)) End Try cn.Close() Private Function CreateDeleteDetail(ByVal cn As SqlConnection) As SqlCommand Dim cmd As New SqlCommand("usp_MC_Del", cn) cmd.CommandType = CommandType.StoredProcedure Dim parm As SqlParameter Dim pc As SqlParameterCollection = cmd.Parameters parm = pc.Add("@MCID", SqlDbType.Int, 0, "MCID") parm.SourceVersion = DataRowVersion.Original Return cmd End Function Tag: Power raising in a datacolumn expression Tag: 109573
  - 24
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  - 25
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Hello,

Does anybody know how to use power raising in a datacolumn expression ??

Example:

NewColumn = FirstColumn ^ 1.2345

or

NewColumn = Power (FirstColumn,1.2345)

--
Thanks in advance
Jos Beelen

Top

Re: Power raising in a datacolumn expression by Val

Val
Tue May 03 17:42:21 CDT 2005

Hi Jos,

It should be like

MyDataSet.Tables("MyTable").Columns("NewColumn").Expression = "FirstColumn ^
1.2345"

--
Val Mazur
Microsoft MVP

http://xport.mvps.org

"Jos Beelen" <JosBeelen@discussions.microsoft.com> wrote in message
news:3141278F-6772-4A64-8118-F88899617FD4@microsoft.com...
> Hello,
>
> Does anybody know how to use power raising in a datacolumn expression ??
>
> Example:
>
> NewColumn = FirstColumn ^ 1.2345
>
> or
>
> NewColumn = Power (FirstColumn,1.2345)
>
>
> --
> Thanks in advance
> Jos Beelen

Top

Re: Power raising in a datacolumn expression by JosBeelen

JosBeelen
Wed May 04 01:58:05 CDT 2005

Hello Val,

Thanks for your response.

I already tried this, but power raising using the ^ operator is not
supported in an expression. So I am looking for an acceptable work around.

Jos Beelen

"Val Mazur (MVP)" wrote:

> Hi Jos,
>
> It should be like
>
> MyDataSet.Tables("MyTable").Columns("NewColumn").Expression = "FirstColumn ^
> 1.2345"
>
> --
> Val Mazur
> Microsoft MVP
>
> http://xport.mvps.org
>
>
>
> "Jos Beelen" <JosBeelen@discussions.microsoft.com> wrote in message
> news:3141278F-6772-4A64-8118-F88899617FD4@microsoft.com...
> > Hello,
> >
> > Does anybody know how to use power raising in a datacolumn expression ??
> >
> > Example:
> >
> > NewColumn = FirstColumn ^ 1.2345
> >
> > or
> >
> > NewColumn = Power (FirstColumn,1.2345)
> >
> >
> > --
> > Thanks in advance
> > Jos Beelen
>
>
>

Top