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  • Getting this error while reading excel from c#

    - by Lalit
    Hello all, I have code string conn = @"Provider=Microsoft.ACE.OLEDB.12.0;DSN=Excel Files;DBQ=" + strSheetPath + @";DriverId=1046;FIL=excel 12.0;MaxBufferSize=2048;PageTimeout=5;"; //string conn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + strSheetPath +";Extended Properties=Excel 12.0 Xml;HDR=YES;IMEX=1"; string destinationConnectionString = ConfigurationManager.ConnectionStrings["KGD6DBConnectionString"].ConnectionString; string query = "Select * From [Sheet1$]"; using (var myConnection = new OleDbConnection(conn)) using (var destinationConnection = new SqlConnection(destinationConnectionString)) using (var bulkCopy = new SqlBulkCopy(destinationConnection)) { //Map first column in source to second column in sql table (skipping the ID column). //Excel schema[CompanyName,Phone] Table schema[ShipperID, CompanyName, Phone] bulkCopy.ColumnMappings.Add(0, 1); bulkCopy.ColumnMappings.Add(1, 2); bulkCopy.ColumnMappings.Add(2, 3); bulkCopy.ColumnMappings.Add(3, 4); bulkCopy.ColumnMappings.Add(4, 5); bulkCopy.ColumnMappings.Add(5, 6); bulkCopy.ColumnMappings.Add(6, 7); bulkCopy.ColumnMappings.Add(7, 8); bulkCopy.ColumnMappings.Add(8, 9); bulkCopy.ColumnMappings.Add(9, 10); bulkCopy.ColumnMappings.Add(10, 11); bulkCopy.ColumnMappings.Add(11, 12); bulkCopy.ColumnMappings.Add(12, 13); bulkCopy.ColumnMappings.Add(13, 14); bulkCopy.ColumnMappings.Add(14, 15); bulkCopy.ColumnMappings.Add(15, 16); bulkCopy.ColumnMappings.Add(16, 17); bulkCopy.ColumnMappings.Add(17, 18); bulkCopy.ColumnMappings.Add(18, 19); bulkCopy.ColumnMappings.Add(19, 20); bulkCopy.ColumnMappings.Add(20, 21); bulkCopy.ColumnMappings.Add(21, 22); bulkCopy.ColumnMappings.Add(22, 23); bulkCopy.ColumnMappings.Add(23, 24); bulkCopy.DestinationTableName = "dbo.sampleInventory"; using (var myCommand = new OleDbCommand(query, myConnection)) { myConnection.Open(); destinationConnection.Open(); var myReader = myCommand.ExecuteReader(); while (myReader.Read()) { bulkCopy.WriteToServer(myReader); } } } return (new DataTable()); getting error on connection opening line. Error: Could not find installable ISAM.

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  • DataGridView cells not editable when using an outside thread call

    - by joslinm
    Hi, I'm not able to edit my datagridview cells when a number of identical calls takes place on another thread. Here's the situation: Dataset table is created in the main window The program receives in files and processes them on a background thread in class TorrentBuilder : BackgroundWorker creating an array objects of another class Torrent My program receives those objects from the BW result and adds them into the dataset The above happens either on my main window thread or in another thread: I have a separate thread watching a folder for files to come in, and when they do come in, they proceed to call TorrentBuilder.RunWorkerAsynch() from that thread, receive the result, and call an outside class that adds the Torrent objects into the table. When the files are received by the latter thread, the datagridview isn't editable. All of the values come up properly into the datagridview, but when I click on a cell to edit it: I can write letters and everything, but when I click out of it, it immediately reverts back to its original value. If I restart the program, I can edit the same cells just fine. If the values are freshly added from the main window thread, I can edit the cells just fine. The outside thread is called from my main window thread, and sits there in the background. I don't believe it to be ReadOnly because I would have gotten an exception. Here's some code: From my main window class: private void dataGridView_DragDrop(object sender, DragEventArgs e) { ArrayList al = new ArrayList(); string[] files = (string[])e.Data.GetData(DataFormats.FileDrop); foreach (string file in files) { string extension = Path.GetExtension(file); if (Path.GetExtension(file).Equals(".zip") || Path.GetExtension(file).Equals(".rar")) { foreach (string unzipped in dh.UnzipFile(file)) al.Add(unzipped); } else if (Path.GetExtension(file).Equals(".torrent")) { al.Add(file); } } dataGridViewProgressBar.Visible = true; tb.RunWorkerCompleted += new RunWorkerCompletedEventHandler(tb_DragDropCompleted); tb.ProgressChanged += new ProgressChangedEventHandler(tb_DragDropProgress); tb.RunWorkerAsync() } void tb_DragDropCompleted(object sender, RunWorkerCompletedEventArgs e) { data.AddTorrents((Torrent[])e.Result); builder.Dispose(); dh.MoveProcessedFiles(data); dataGridViewProgressBar.Visible = false; } From my outside Thread while (autocheck) { if (torrentFiles != null) { builder.RunWorkerAsync(torrentFiles); while (builder.IsBusy) Thread.Sleep(500); } } void builder_RunWorkerCompleted(object sender, System.ComponentModel.RunWorkerCompletedEventArgs e) { data.AddTorrents((Torrent[])e.Result); builder.Dispose(); dh.MoveProcessedFiles(xml); data.Save(); //Save just does an `AcceptChanges()` and saves to a XML file }

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  • Transaction within IF THEN ELSE doesn't commit

    - by boris callens
    In my TSQL script I have an IF THEN ELSE structure that checks if a column already exists. If not it creates the column and updates it. IF NOT EXISTS( SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'tableName' AND COLUMN_NAME = 'columnName')) BEGIN BEGIN TRANSACTION ALTER TABLE tableName ADD columnName int NULL COMMIT BEGIN TRANSACTION update tableName set columnName = [something] from [subquery] COMMIT END This doesn't work because the column doesn't exist after the commit. Why doesn't the COMMIT commit?

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  • MS Access: index optimisation

    - by Patrick Honorez
    Let's say we have a [Valuations] table containing several values per date and per fund: -FundId -ValDate -Value1 -Value2... The Primary key is obviously FundId+ValDate. I have also indexed the ValDate field since I often query for values on a specific date. My question is: should I also create a specific index for the FundId, or is MsAccess clever enough to use the Primary key when querying on a specific FundId ?

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  • Migrate MySQL database to Sql Server

    - by RPK
    I recently encountered a problem in my production database due to MySQL bug. The bug is in the TimeStamp column. To avoid any inconvenience, I want to migrate the database to either Sql Server. Is there any FREE tool to easily and reliably migrate data and table structures?

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  • How to version control data stored in mysql

    - by Shawn
    I'm trying to use a simple mysql database but tweak it so that every field is backed up up to an indefinite number of versions. The best way I can illustrate this is by replacing each and every field of every table with a stack of all the values this field has ever had (each of these values should be timestamped). I guess it's kind of like having customized version control for all my data.. Any ideas on how to do this?

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  • MySQL Non Index Queries Analysis

    - by Markii
    I'm using the log queries not using index but it logs all that use indexes but just more advanced or using IFs. Is there a parser or a program out there that can analyze the log and give me a literal output of saying "table.column should be a index" Thanks

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  • Android Progress Dialog not showing

    - by ilomambo
    This is the handler, in the main Thread, which shows and dismisses a progress dialog. public static final int SHOW = 0; public static final int DISMISS = 1; public Handler pdHandler = new Handler() { @Override public void handleMessage(Message msg) { Log.i(TAG, "+ handleMessage(msg:" + msg + ")"); switch(msg.what) { case SHOW: pd = ProgressDialog.show(LogViewer.this, "", getText(R.string.loading_msg), true); break; case DISMISS: if(pd != null) { pd.dismiss(); pd = null; } break; } } }; The message to show the progress is: pdHandler.sendMessage(pdHandler.obtainMessage(SHOW)); The message to dismiss it is: pdHandler.sendMessage(pdHandler.obtainMessage(DISMISS)); It works well when I call it before I start an AsyncTask, the AsyncTask onPostExecute() dismisses it. But when it runs within a runnable (runOnUiThread), the dialog does not show. Examining the pd variable on the debugger, it shows that is is created, it is running and it is visible, but in practice it is not visible. Any suggestion? UPDATE: I did the obvious test I should have done in the first place. I commented the DISMISS message. And the progress dialog did show up. It appeared too late, after the runnable was finished. I undestand now that the DISMISS message did dismiss the not-yet-visible ProgressDialog, that's why I did not see it. The question becomes now: I need the ProgressDialog to show BEFORE the runnable code is executed. And it is not so straight forward. My call hierarchy is like this: onScrollEventChanged --> runOnUiThread ( --> checkScrollLimits --> if need to scroll show ProgressDialog "Loading" get new data into table dismiss ProgressDIalog ) I tried something like this: onScrollEventChanged --> checkScrollLimits --> if need to scroll show ProgressDialog "Loading" --> runOnUiThread ( get new data into table dismiss ProgressDIalog ) But still the dismiss message got there before the ProgressDialog could show. According to Logcat there is a five second interval between the arrival of the SHOW message and the arrival of the DISMISS message. UPDATE II: I though I will use the isShowing() method of ProgressDIalog pd = ProgressDialog.show(...) while(!pd.isShowing()); But it does not help at all, it returns true even if the dialog is not showing yet.

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  • Linq to SQL: how get row security between write access??

    - by Francisco
    I would like to allow two threads to write in a table at the same time (I know the problem of updating the same row, but this would be a story apart). I need that in behalf of speed up the operations in my aplication (one thread could write in row X while another could do the same in row X+n instead of waiting the first to finalize). So, can I block rows instead of tables with Linq to SQL? Thanks.

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  • MySQL - Extracting Time in correct format

    - by mouthpiec
    Hi, I have a table with a coloumn of type "time", and the values in this coloumn are stored as follows: 20:45:00, 18:00:00, etc. Now when displaying the result, I am not getting the minutes, but just 00. I am using the following to get the time: SELECT TIME_FORMAT(time, '%h:%m') as time FROM ......... etc

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  • Getting all database entries into organized array

    - by Industrial
    Hi everyone, I have just made the update/add/delete part for the "Closure table" way of organizing query hierarchical data that are shown on page 70 in this slideshare: http://www.slideshare.net/billkarwin/sql-antipatterns-strike-back However, I have a bit of an issue getting the full tree back as an multidimensional array from a single query. Here's what I would like to get back: array ( 'topvalue' = array ( 'Subvalue', 'Subvalue2', 'Subvalue3' = array ('Subvalue 1', 'Subvalue 2', 'Subvalue 3' ) ); );

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  • What kind of structure should I use to keep prospectus of a medicine?

    - by ahmet732
    My project is similar to: Users search the name of a medicine from a table. Then touch the medicine he/she looked for . Then prospectus of that medicine will appear on the view... How should I keep prospectus of medicine?(prospectus of a medicine consists of several lines of text) SQLite or NSDictionary thing... I thought that NSDictionary will not go well with my need... Any answers ???

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  • How do I conditionally select a field from one of two tables?

    - by freakwincy
    I have two tables invoices and pending_payments both of which have the following rows in common: invoice_id and balance. I want to do a select in MySQL that'll work thus: [pseudo-code] if(invoice_id exists in pending_payments table) { select balance from pending_payments where invoice_id = yadayadayada } else { select balance from invoices where invoice_id = yadayadayada } Is this even doable in MySQL? If so, how?

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  • How to manually build mysql cache

    - by hamstar
    I have a table of over 150,000 rows of which most would be updated daily. I have mysql caching turned on so the pages load faster however everytime the database is updated the pages load slow again, which I assume is the cache building itself again. So at the moment I have resorted to doing a wget -m --delete-after http://localhost/ on the server however this takes about 4 hours to complete and moves something like 13 gig. Is there a better way to do this?

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  • Is a clear and replace more efficient than a loop checking all records?

    - by Matt
    I have a C# List, that is filled from a database.. So far its only 1400 records, but I expect it to grow a LOT.. Routinely I do a check for new data on the entire list.. What I'm trying to figure out is this, is it faster to simply clear the List and reload all the data from the table, or would checking each record be faster.. Intuition tells me that the dump and load method would be faster, but I thought I should check first...

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  • Maintain case sensitivity when importing db into windows

    - by razass
    I have an export from a MYSQL database on a linux machine however when importing that database into MYSQL on windows all of the table names that were camel cased are now all lower case. The sql dump has the correct case in it but the importing via phpmyadmin seams to remove these. How can I import it and keep the case? Thanks

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