Method Which Check If A Certain DSN Exists Then If It Does Extract Information And Use Information For Connection Purposes
Feb 2, 2011
I was looking for some stuff online, and i was looking through my reference sheets for vb.net, but it seems in the code i have found, there is declare in methods. Below is an example i am talking about. The thing is, that i dont recognize it and believe that it is an earlier version of Visual Basic ( 6 or earlier) which used it. Should i just keep looking for different code?
Public Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpenKeyA" (ByVal hKey As Long, ByVal _
lpSubKey As String, phkResult As Long) As Long
Goal: Find information on how to implement a method which will check if a certain DSN exists, and then if it does, extract the information and use the information for connection purposes.
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Jun 9, 2011
The program is currently trying to pull information from three different database tables and compiling the information onto one screen, to do this i am using three different connections and a function to handle the data at each stage. The issue is as my code hits PageLoadStage of "2" and runs the QueryDatabase() Function i am encountering an error of: "OleDB exception unhandled: No value given for one or more of the required parameters." This occurs on line 15 of the first code snippet. Can anyone explain this and/or identify any code issues if that is the cause.
[Code]...
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Dec 8, 2009
What is the best way to validate whether or not information exists in a datagrid. Let me give a situation.
What I'm trying to do here is allow the user to search and sort the dgv based off of the character or string that is he/she inputs into a textbox. The things I want to validate are:
The textbox is not blank, and if not blank has valid information. (easy enough)
The dgv has actually been populated from the dataset!!!!!
The second I can't seem to nail down, regardless of what I use. I have tried using rowcollections, columns.count(), cell, item, and a few other properties all of which either get skipped over by my if statements or throw an index is out of range error.
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Sep 28, 2010
am using visual basic 2010 express and i have managed to place the path to a file in a text box. how can i extract just 1 item from the path.ie my path is url.i wish to extract mine (nothing else) and put it into textbox2.
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Jan 27, 2010
i have this assignment (task sheet attached) but i dont know exactly where should i complete from. i need to extract information from a text file. it involves a complex string manipulation. here is the code that i already did but i am not sure how can i extract the information i need from the appendix in the yask sheet. [code]
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Nov 8, 2009
Extract information from a video file?
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Feb 16, 2012
I have two cases to extract information from the IDataReader object
Case - 1 - Length, calculates ordinal and then parse string
public static string GetString(IDataReader rdr, string columnName)
{
int ordinal = rdr.GetOrdinal(columnName);
[Code]....
Which technique should be preferred and why and if any specific context ?
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Jan 18, 2011
I am attempting to extract information about a work location from the IADsUser object. Other IADsUser methods like IADsUser::LastName or IADsUser: :EmailAddress return a string.I thought IADsUser::PostalAddresses returned a variant (array of strings) and I have attempted to extract the infromation, but I have had no success so far. I can find very little documentation on how to extract this information.I have provided some code below to try and make it clear what I am trying to do.[code]I am not sure how to print out objects properly in VB6. I am not concerned whether or not a particular IADsUser has the information I am looking for; I have error handlers in place to check for this. I removed them to make the code easier to read.
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Jan 4, 2010
I have a relatively simple Listview that suddenly needs (due to new requirements) to have it's 'layout' extracted to a DataTable so that a common routine can convert it to an Excel spreadsheet for export purposes.The ItemTemplate is just a series of Table Rows with some text, data-bound labels and textboxes with validators in the cells.Usually, when trying to pull out a particular value (like what was entered into a text box), I use the ListViewItem's .FindControl method.
For Each objItem As ListViewItem In lvwOptions.Items
Dim objTextHrsLabor As TextBox = CType(objItem.FindControl("txtHrsOptByLabor"), TextBox)
decHours = CDec(objTextHrsLabor.Text)
Next
In this case, however, I'm trying to take all the data displayed - all the 'rows and columns' of the table that was created.Inside the ForEach / Next loop of ListViewItems, I started a ForEach/Next loop of Controls for each instance's controls but I got some really strange results returned (like controls that had a couple of table cells in them).
I get the sense I'm headed in the wrong direction. All I want is for the nicely-formatted 5-line, 6 column table to be converted to a 5-line, 6-column data table.
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May 24, 2009
what i am trying to do is extract information beween two tags in some html from the source of a website. The contents of the text between the two tags will always be different. the code i currently have is;
[Code]...
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May 24, 2012
I have a text box where i am entering numbers of double datatype andon the Keytdown event of the textbox some checks take pace and in certain circumstances I want to be able to stop the user from entering other information until they enter the right information in the textbox (where it says right here) . now when I say exit sub the textbox somehow loses focus . but this is not how I want it to be I want the textbox to remain with the focus so the user can change the information . How can i go about this. And the other thing is why is my txtDestPayRate1.Focus() just befor the exit sub not working?
Private Sub txtDestPayRate1_KeyDown1(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles txtDestPayRate1.KeyDown
If e.KeyCode = Keys.Enter Then
[CODE]...
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Dec 3, 2009
I am designing a backup/restore utility for work.atm i have been able to populate field for PC name, IP address, MAC address, number of printers installed on the PC but i am wondering is it possble to get all the printer information 'with the click of a button' to print all information like the prnmngr.vbs script down.I am able to run a batch file but i wanna get it to go from that app or even embed to batch file to the app and run it form there .
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Dec 31, 2011
I am having a very strange problem that started after installing the Visual Studio Service Pack 1. Let me first lay ground work, forgive me if it gets a little long, but I need to give all this info for this to make any sense.I was having a problem with one of my forms not saving changes made to the child data on the form. So I decided to rebuild the form with no code other then the bindingnavigatorSaveItem_Click and the load statement.
When I tried to save a change to the data with the new form I got this error message: �TableAdapterManager contains no connection information. Set each TableAdapterManager Table Adapter property to a valid Table Adapter instance.� Using a break point I stepped through the code into the DataSetDesigner.vb and found the error was originating from this piece of code
Dim workConnection As Global.System.Data.IDbConnection = Me.Connection
If (workConnection Is Nothing) Then
Throw New Global.System.ApplicationException("TableAdapterManager contains no connection information. Set each TableAdapterManager TableAdapter property to a valid TableAdapter instance.")
End If
I had just installed an update to Visual Studio 2010, Service Pack 1, so I thought that had hosed my entire project so I opened my previously created form to test a save with it and did not get the error. Very strange both of these forms are using the same table adapter manager and both jump to the same dataSetDesigner.vb code, so why the different results.
I then followed the code from both forms and saw something even stranger. The original and new forms follow the same code logic until they get to this piece of code in the dataset vb code:
If ((Not (Me._tblIncidentTableAdapter) Is Nothing) _
AndAlso (Me.MatchTableAdapterConnection(Me._tblIncidentTableAdapter.Connection) = False)) Then
Throw New Global.System.ArgumentException("All TableAdapters managed by a TableAdapterManager must use the same connection s" & _
[code]....
It then returns to the first If statement shown above and processes through without the error.has anyone had this error after installing service pack 1 for VS 2010 and if so did you fix it. And why would the code leave the If statement, jump to another function without any visible call to that function, that I can see.
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Oct 12, 2010
I have legacy hardware in our building that can accept commands via TCP as long as they have formatted XML in them. Using Wireshark, I have determined the proper format of what needs to be sent.
The problem: When using the original systems controller, I can look at the packet that is sent and see very specifically that there is a section for "eXtensible Markup Language" that has everything laid out properly. When I create my own TCP stream and send the same information, it gets sent as Hypertext Transfer Protocol text, and thus is not picked up.
My code is as follows:
Dim tcpClient As New System.Net.Sockets.TcpClient()
Dim bytes(tcpClient.ReceiveBufferSize) As Byte
Dim clientdata As String = ""
[CODE]...
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Feb 9, 2011
I have an application with a datagrid and a save button.Here's the save button
Private Sub SaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveButton.Click
Me.Validate()
Me.PlayerCharacterBindingSource.EndEdit()
[code]....
I'm getting the following error upon clicking the save button."TableAdapterManager contains no connection information. Set each TableAdapterManager TableAdapter property to a valid TableAdapter instance."
It's on this line: Me.TableAdapterManager.UpdateAll(Me.DataSetPlayerCharacters)
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Jan 16, 2012
I'm currently working on this .Net/WPF project. I'm trying to get the method to check to see if a skin file exists before applying. I have feeling that my address formatting my be wrong....
Dim lobjSPEConfigService As SPEConfigurationService = New SPEConfigurationService
Dim lobjSkinFilePath As String = CStr(lobjSPEConfigService.GetApplicationSetting("SkinFileLocation", GetType(String)))
If String.IsNullOrEmpty(lobjSkinFilePath) Then
lobjSkinFilePath = "/SPE.Infrastructure.UI/Application/Resources/Skins/LightSkin"
[Code] .....
The file is being referenced thourgh the project...
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Apr 11, 2009
I'm working on a base class right now, here's a basic rundown of it:[code]The problem is, in the Public Class bar example, some classes may implement MyInterface, and others don't. What I'd like to be able to do is have the sub New() in the structure in the base class "Foo" be able to tell if the class calling it (either the Base class, or the child class) implements MyInterface or not.
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Nov 17, 2009
I need to pull hardware info and display into some type of a control like a ListView. I've been doing some general research and found that most people have used WMI. I would like to avoid WMI if possible because of possible compatibility problems.However, if that's the best way, then that's the way I'll go.I was wondering if anyone knew of other methods, perhaps an API or other unmanaged code?
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Dec 22, 2011
I'm wondering if I create a program that connects to a mysql database, will they be able to decompile it and do anything with the mysql connection information?
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Dec 30, 2011
The info i need extracted is formatted:
<TD><A HREF="http://xxxxx.com/xxxxxx/index.html"><IMG SRC="../xxxxx/thumbnails/xxxxx.jpg"> </A></TD>
<TD>=== <B><A HREF="http://xxxxxxxxx.com/xxxxxxxx/index.html">LINE 0</A></B> ===<BR>
<FONT SIZE="2" COLOR="#400080">
[code]....
how do i extract the info between TD=== and /a and Line 1,2, and 3 and store it into a database from a live website?
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Feb 2, 2012
As the Picture show above, When I type the question marks in my txt File, it will appear in the GPRS Username. So how to tell the user who type in the wrong information?this is my loading button's coding:
Private Sub Loadbtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Loadbtn.Click
'Dim strFileName As String
'strFileName = OpenFileDialog1.FileName[code].......
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Jun 9, 2011
Someone told me that i should stick with method #2, form2 has an id that form1 passes in order to load information from.
method #1
CODE:
method # 2
CODE:
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Dec 5, 2006
I am faced with the prospect of having to completely rewrite the application.I have suddenly started to get this error message all the time - it seemed to start after I added a table to the schema, but deleting the table makes no difference. I can't see anything wrong with the connection string, but as it seems to be entirely undocumented, that doesn't mean much.
The connection string contains DataSource=.SQLEXPRESS;AttachDbFilename=|DataDirectory| est.mdf;Integrated Security=True;User Instance=Trueand certainly the string works when I use "test connection" from the application setting edit box. I am assuming that for some reason it is not evaluating the Data Directory , but can't see any reason why it shouldn't. Any ideas gratefully received! What might be a clue though is that I can't get rid of the table I added. I have deleted it from the database, deleted it from designer and saved the file, but it just keeps reapearing! Even when it is not showing, there is still a
table adapter in the .xsd file. I am reluctant to start editing this manually because of the danger of screwing something else up - I did try but it caused an error somewhere else (VS helpfully didn't say where)
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Sep 7, 2010
I'm using the following code, which works, to login a user to an application built in VB.NET against active directory.This code works great but I need to retreive the user's first name, last name, display name and also check if the user is part of a group.
I've tried many forms of adResults.Property("displayname").ToString() and the like but just can't get it to work right.Anyone have any ideas how to do what I'm looking to do?Public Function ValidateActiveDirectoryLogin(ByVal sDomain As String, ByVal sUserName As String, ByVal sPassword As String) As Boolean
[Code]...
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Aug 27, 2009
I am using VB2005 and trying to put an application together.What it needs to do is retrieve information from a binary file, possibly alter that information, and put it back into a new file.The file is a .wav file with data appened to the end. There is an additional section at the end of the .wav file which stores xml data.I have found that if I open this in a hex editor and make a 1:1 swap on any of the bytes that the application that the file is for can still read the XML.If I tried to add or remove characters from the XML then it would not read. I located a header byte and incremented it to resolve this.
This worked as an excellent bandage to do conversions where the data always needed to be changed to the same thing.What I have been asked to do is build logic that allows for different things to happen depending upon what data is contained within the file.The method that I am currently trying to impliment is:
Read through the file with a system.io.binaryreader
Searche for a bytestream that will signal data is coming
For example:
If System.IO.File.Exists("C: est estread.wav") Then
Dim findit() As Integer = New Integer() {&H3C, &H55, &H73, &H72, &H44, &H65, &H66, &H30, &H31, &H30}
Dim i As Integer[code].....
And then extract all the data till the end of element marker "<" It seemed like there should be a better way and I was looking for some insight. If I proceed with this method, I will have to read the file one time to gather the information and then a second time to write it all out with the header modified for length.This is my first experiene with working with binary files in this way.Also,I've been experiementing with building a string and slapping it back in at the end using the binarywriter.write(string) method.I noticed that it was putting in header characters before the string.These seem to change if I change the length of the string.At one point it was d0 07. Later it became e7 07. Does anyone know of a way to prevent this header from being inserted?
I tried a for each loop to grab all of the characters from the string, convert them to a byte array and deposit the byte array into the file, but the header remained the same. When I write the byte array generated from a system.io.binaryreader I do not get this header.
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May 8, 2012
I have code which saves DGV contents including check box columns as a comma separated text file. I also have correct code which will take the text file and re-insert it into the DGV at a later time. This all works.When I'm working on the DGV, I have this
Private Sub DataGridView1_CellValueChanged(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellValueChanged
If DataGridView1.Columns(e.ColumnIndex).Name = "Column12" Then[code]....
So that when the check box is true, columns 1 and 3 turn different colours, and when false, go to a yellow colour.However, when I "re-insert" my DGV info from my text file, the check boxes come back correctly - as true and false on the right rows - but columns 1 and 3 don't change colour. I've tried a "DataGridView1.Refresh" option but not getting it to work.The DGV is unbound. I need it to recognise which check boxes are true and update automatically when the information is opened from a text file.
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Oct 8, 2009
I have a fair bit of experience with VB.NET and C# (In this case I chose VB.NET, blame my laziness), but I do most of my professional work using PHP. I have no experience what so ever in using any database with VB.NET let alone MySQL.Just FYI, at the moment I am only trying to Query the database to gather the information required to activate. The Activation wizard and algorithm building (which is finished anyway), and everything else will come soon. I chose the MySQL database because I have experience with it, and it seems the best option for remote usage.The whole idea already works in PHP, I'm just have major issues moving it accross into VB.NET (Using the MySQL Connector.NET);I understand the basics, and all I need to know how to do is Count Rows and gain access to the other information in a row based on provoided information (in PHP, through mysql_ result)
So, here goes nothing, this is the Query code I am using in PHP to complete the job I want to do in VB.NET. [code] As you can see, I basically need to get the PHP code into VB.NET to fit into the 'btnQueryDB.Click' Command in VB.NET. By Equivalent, the Product ID in VB.NET will come from 'txtPID' and similar, Serial Number will come from txtSNUM. Once counted to be 1, the Activation Code and Status will be fed into 2 other text boxes in the form. (acCode, and acStatus).
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Mar 9, 2009
I am targetting framework 3.5 using a OneClick Deployment, code and packaging done in Visual Studio 2008 Standard Edition.I have code which works in my debug environment, and when installed on the development machine. It also works on one other machine. However, three other machines are throwing exceptions.The situation throwing the exception is that I have a serial port I am accessing, which is open, and which has been successfully opened. I then try to close the port using the following
[Code]...
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Sep 25, 2010
I was wondering if anyone could show me how to check if a tag exists?Here is the code that I am using to get the information from the xml.
Dim XmlFile As New XDocument
XmlFile = XDocument.Load(WorkingDirectory & "ToolsMediaInfoMediaInfo.xml")
Dim Manage = XmlFile...<track>
For Each XmlTag In Manage
If XmlTag.FirstAttribute.Value = "General" Then
[Code]...
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Jul 10, 2009
This is the standard way of checking if URL exists [code]....
return true; } catch (Exception ex) { return false; } But my problem is that we have to check it for around 100 URL's. It takes more then 2 minutes to check for all as it is trying to get response of all of them. Is there any way that we can check if URL exists without getting complete Response so that total response time is less.
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