Iterating A WMPLib.IWMPPlaylist Displays Empty Rows In VB 2010 Express?
Oct 1, 2010
When I iterate the media items in a Windows Media Player playlist and set the properties of a user-defined class to the attributes of a media item, the first n rows of the playlist are populated with useful information; however, the remaining rows are empty. If I perform the same operation but access the media items directly (e.g., display the attributes to the console window) then all items in the playlist are populated properly.
Here is an example of the output showing the condition:
Inserting song "The Arrest" from album "Jesus Christ Superstar [MCA Original Cast Recording] Disc 2" into database...
Inserting song "Peter's Denial" from album "Jesus Christ Superstar [MCA Original Cast Recording] Disc 2" into database...
Inserting song "Pilate and Christ" from album "Jesus Christ Superstar [MCA Original Cast Recording] Disc 2" into database...
[code]....
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May 2, 2011
I am using wmplib and i like to know a duration time of a lot of files onto a same folder (software for audiobook for low vision persons)
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Oct 3, 2010
i have a problem. I have database with a tableadpater. i want to get the userid with this tableadapter.
Dim dsGN As New ForumTableAdapters.Message2TableAdapter
Dim dtBetrieb As Data.DataTable = dsGN.GetUserIdFromThisMessage(ConversationID)
For Each objRow As dsGN.Message2Row In dtBetrieb.Rows
mystring = objRow.UserId.ToString
Next
i get the error "dsGN.Message2Row is not defined" The Name ob my table in the database is "Message"
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Dec 3, 2010
we developed an application. it has windows media player control.
Note 1:
2 DLL Files(Interop.WMPLib.dll And AxInterop.WMPLib.dll) is for Windows Media Player Control, and automaticly add by visual studio.
Note 2:
Visual Studio 2008 / .Net Framework 2.0 / Windows XP & Vista & 7
If use dlls for windows xp(Windows Media Player Control)
run app in windows xp = do not have any problem.
run app in windows vista and 7 we do not have media player control.
if use dlls for windows vista and 7(Windows Media Player Control)
app does not run in windows xp
and we do not have any problem in windows vista or 7.
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Nov 7, 2010
The following code executes successfully 48 times. During the 49th iteration after executing (or during execution of) bitmap.EndInit() the for each loop stops executing and the xaml window appears. Anyone have any idea what might be occurring?
[Code]...
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Oct 18, 2011
Is it possible to retrieve the value of a cell from the row and column index of an Excel.Worksheet? I need to itearate through all the rows and columns and get the values.[code]
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Apr 6, 2012
I want to edit the rows and columns of an excel file using vb 2010 express. NOTE : I dont want to open .exl file but want my program to read and edit them according to user. PS : I want to edit them according to cell number.
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Jan 3, 2011
I need to give the user an ability to add rows. i can't figure out what control to use to accomplish this. for example
first row with empty text boxes is always visible:
[first name] [last name] [middle name]
add more button
[code]......
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May 27, 2009
I'am new in the VB world, and should translate excel sheets into new sheets.I'am using Visual Studio 2008 (with VB .net I think) and I'am trying to tackle empty rows deletion.Maybe an additional problem is, that some columns having a space (visualy the row is empty and should be deleted).[code]...
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Dec 2, 2011
I am wondering if it is possible to iterate using columns of datatable.
I have tried something like this:
Dim myCol As New DataColumn
Dim myRow As DataRow = Nothing
Dim myCell As New DataGridCell
[Code]....
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Apr 8, 2010
MsgBox(MyDataSet.mytable.Rows.Count)
Gives 0, why?
The table has data!
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Feb 4, 2011
My requirement is to read all rows of an excel-sheet in first column that are not empty, are numeric and have a length between 15 and 20.
For example:
358218033354974
359473035499561
358218036156129
354022038366247
358218032490035
359473030516492
353210040325399
This column might have a header that is not numeric and there might be empty rows. This would cause an exception when importing them via SqlBulkCopy. So i want to prefilter the correct rows via OleDbCommand.
What I have tried so far is following(C# is also appreciated):
Using connection As New OleDbConnection(sExcelConnectionString)
connection.Open()
Dim schemaTable As DataTable = _
connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, _
New Object() {Nothing, Nothing, Nothing, "TABLE"})
[Code] .....
But this throws an exception if there are empty rows or the format of the value is incorrect. So my question is: How to restrict the rows of OleDbCommand to:
Get only first column of every worksheet
All values that are numeric
Skip empty values
Ideally only the values with a length between 15 and 20
Any way how to skip the empty rows, Or do I have to to select the whole datatable? I hoped it would be possible to do that only with one query because of performance reasons.
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Feb 29, 2012
I am trying to make a user account SQL database work with Visual Basic 2008 Express for login purposes, i.e. usernames & passwords. Plan is to host this server so people can login to use the the application and verify they have a valid account. I would like to host all the account information in SQL due to the possiblity of hundreds of users at any given time. I also need the ability to add data to the database for users registering for the first time. The SQL server will need to be able to access the SQL Server databases remote via WAN.
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Sep 3, 2009
How can I set the column width and leave the top 10 rows empty in order to insert an image into my Excel report?
Here is my code:
If ComDset.Tables(0).Rows.Count > 0 Then
Try
With Excel
[code]....
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May 8, 2012
I have three sub tables that I want to process. For each I want to combine the rows, as they are only different by contents in the second column(I want to do the same to the fourth column, later):
'Sub table 1
xx|C201 |02300877 |Samsung |....
xx|C201 |02300877 |Toshiba |....
xx|C213 |02300877 |Samsung
[code]....
p.s. For the fourth column, Manufacturer information , I want to do the same and I'd probably get something like this for the final table:
xx| C201,C213,C606,C619 |02300877 | Samsung
xx| C201,C213,C606,C619 |02300877 | Toshiba
xx| C303, C305,C712 |02301163
xx| C207, C209, C708 |02301165
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Feb 8, 2009
how to open an excel file and number the rows. The xls file is just a simple 2 column file with 5000 or so part numbers in column B. I need to open it, add numbering to the rows in column A ranging 0 thru 9, then start over at zero again.
i.e.
0
1
2
[Code]....
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Mar 6, 2012
concantenate rows from my ms access database using vb.net. I have a table in ms access where there are contacts of clients, so now i want to seleect only mobile numbers of all clients and then concantenate them seperated by deliminated commas. give me all the mobile numbers into a single row/line seperated each number with a deliminated comma. I have tried different methode but it gives my endless errors. Amongst other things i tried to bind the mobile numbers in to a listbox so that i can loop through and insert all the number in the textbox seperating them with a deliminated commas....that does not work it says "Operator '+' is not defined for type 'DataRowView' and string ";".
This is the code i have used:
Dim address As String
' Dim n As Integer
For i As Integer = 1 To Mobile_PhoneListBox.Items.Count - 1 Step 1
[Code]....
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Oct 16, 2010
I tried to start using VB 2010 Express with a program I originally developed with VB 2005 Express that I moved to VB 2008 Express successfully a couple years ago. It uses a database file (*.mdf) that is on the computer ( not out on a server). When attempt to run the program in debug mode, I get the following error "An attempt to attach an auto-named database for file C:Documents and SettingsTomMy DocumentsQuizzing StuffQuestion Database 2010QuizQuest ionGameQuizQuestionGameinReleaseQuizQuestionDB.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share."
I first made a copy of the entire project folder that was working in VB 2008 Express and gave it a different name. In VB2010 I opened the project in the copied folder and it said it successfully converted the project. I am able to open the Data Source inthe Designer and see the database structure as I expect. I think the project is still using SQL Server 2005 Express (because it is what is checked in the list of prerequisites on the Publish tab).
Note, I have programmed off and on for many years, but fairly new to using databases and SQL Server.
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Feb 29, 2012
Here is the scoop: I am trying to make a user account SQL database work with Visual Basic 2008 Express for login purposes, i.e. usernames & passwords. Plan is to host this server so people can login to use the the application and verify they have a valid account. I would like to host all the account information in SQL due to the possiblity of hundreds of users at any given time. I also need the ability to add data to the database for users registering for the first time. The SQL server will need to be able to access the SQL Server databases remote via WAN.
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Jan 21, 2011
I am trying to re write a VB6 program using MS Access, many years ago, using VB 2010 express and SQL server 2008 R2 Express. I have a database with several tables, which I created using the designer. I am able to connect to the database and select data and display it in textboxes etc in vb code. What I have not been able to in code is to INSERT rows DELETE rows or UPDATE any data in the tables. I can do any of these operations using the Query Designer, but I want to do it in code. I can post some code if necessiary, but I thought it might just be some property that I had not set in the designer.
[Code]...
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May 12, 2010
Is VB Express 2010 slower to compile and run that older versions of VB Express? I've installed it this weekend and it seems a little sluggish on my quad core computer with 1 gig of RAM. I have VB Express 2005 installed for my students at school and it seems to fly just fine. Those school computers are older P4s with 512k of RAM.
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Mar 1, 2009
Some example code to insert rows of datagridview into a sql express database table? Also, how do I manage concurrency as it is a multi user application?
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Jun 3, 2011
Initially my app worked with excel fine, now it causes my computer to reboot only after Excel has been opened (two or more times). I have opened and closed Excel files 20+ times without running thru either of my apps (they all uses identical code for excel) and it has never caused a reboot or a crash.
run either of my apps and have the app control excel has become a crap shoot, it will reboot my computer. Adding to that I then have to do a manual shutdown because the reboot process after is unstable. (System doesn't respond properly). My code in this app is small, should make for a good example. I can provide the entire project to anyone who would volunteer to test it. (First I need to know how to send the project).
[Code]...
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Nov 2, 2009
My DataGridView sorts by date. For grins I entered the date 11-02-2010 fully expecting it to be at the bottom of the list, not listed right after the last 11-02-2009 row and before the first 11-03-2009 row.How do I handle this so that come January 1, I won't see all the 01-01-2009 rows listed first followed by the 01-01-2010 rows then the 01-02-2009 rows, etc?
[code]...
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Feb 29, 2012
there Dream in Code Community! Im an okay programmer as far as skill right now I am still learning as we all are I need some help from some experienced VB.NET programmers in the community, Here is the scoop: I am trying to make a user account SQL database work with Visual Basic 2008 Express for login purposes, i.e. usernames & passwords.
[Code]...
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Jul 30, 2009
I have several problems with rows in a DataGridView. Background information: The DataGridView (DataGridViewCalib) is in one TabPage of a TabControl, some columns of the DataGridView are automatically DataGridViewCheckBoxColumn as the DataSource have some colums which are Boolean. This is a Windows Form written in VB.Net with Visual Studio 2008. The user loads an input data file.
The problems:
1) At first arrival in the TabPage, ShowDataGridViewCalib (code below) is called. All rows are then shown in the DataGridView, despite the code saying that some rows should not be visible. Breakpoints in the code show that the code do arrive at the Rows.Visible = False events. Despite all rows beeing shown a Watch in the debugger shows that:
[code]...
There are two alternative ways of handling the rows in the code. The first attempt (commented away here) is probably the "nicest".
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Feb 13, 2010
I am using Windows Media Player library (WMPLib.dll) in my application. I wanted to make CD Burning wizard, because WMPLib.dll has ability to burn audio/data CD's. I declared an object which can erase or burn CD:
Dim CDBurner As WMPLib.IWMPCdromBurn
Dim WMP As New WMPLib.WindowsMediaPlayer()
[CODE]...
I get exception with message "Attempted to read or write protected memory.". I have an option "Full Trust Application" enabled in Visual Sudio. Is there anything I can do about this error?
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Sep 1, 2011
Can anyone tell me why "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound." I keep getting an error "Invalid Operation Exception was Unhandled" error. All I am attempting to do is allow the user to select products from a list(or a second datagridview) and have it added to the datagridview so they do not have to type in every cell since the other cells are not visible because they do not purtain to their needs. Plus they will be able to save all items at the same time.
[Code]...
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Sep 13, 2011
I have two datagridview's both are databound. First one shows items for sale and the second stores all the items that were sold. I am trying too transfer selected rows from one to the other but no matter what I keep getting told "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound."
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Nov 19, 2011
I'm trying to make a little app that displays the battery life of a notebook, and also whether it is charging or not.I've got it displaying the battery percentage and if it is running via the cable or battery alone.My problem is that I have a timer constantly ticking to grab the latest information as to whether it is still chraging, what the battery % is like, however for some reason when it first runs it get's the info but then that's it, it won't refresh the info in real time. I'm confused because the battery can deplete but the program only displays what info it got when it was first ran but if I unplug the power cord or plug it back in it refreshes that info straight away. My code is:
Public Class Form1
Dim psBattery As PowerStatus = SystemInformation.PowerStatus
Dim perFull As Single = psBattery.BatteryLifePercent
Dim GraphicPercent As VariantType
[code]....
The bit I've highlighted in red in my code won't work either, basically I've shaped the two labels to look like a crude battery shape and label2's function is to represent the nobly bit at the top of the battery and I wan't that to change to Lime when the battery is 100%.why it won't refresh the graphical output to the screen?
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