Seeing If Value In Listbox Exists
Sep 4, 2011
i have 2 forms, when the listbox on form one wants to add to the listbox on form 2 i want to see if the item being added is already in listbox on form 2. I am not using searchlite as i don't understand it so this is what i have.LINE 4 IS THE LINE THAT IM TRYING TO IMPLEMENT.[code]i know that i can send selected listbox value to textbox and check that way but didn't want to code it that way.you wouldnot believe it, while writing the main post i re read it after i sent it and worked it out.[code]
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Feb 1, 2010
I have 2 listboxes on my form.Listbox 1 - populated with "available" field namesListbox 2 - populated with "selected" field names.There cannot be the same field name in both listboxes - it's either one of the other.The logic I was going to apply was to populate Listbox 1 with every field name ... and then as I populated Listbox with the field names which the user has already selected, remove the corresponding item from Listbox 1.
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May 8, 2011
I have a form that I want to check if the listbox contains a value then I want it to delete the image inside btnHouse, insert text into that button, and disable the use of the button. I have that done, but the problem I am having is that my if statement is only checking the first item inside the listbox, not all the items. Is there any way to have the statement check every item?[code]...
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Apr 30, 2009
This will check for an item in a listbox.[code]...
How do I check if an item exists in a listbox?
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Nov 19, 2009
If I set a ListBox.Height = ListBox.PreferredHeight when the control is hidden and IntegralHeight = True, then set it visible:
a) Actual Height reduces by typically 3-5 pixels after redraw (but not 1 pixel per item).
b) PreferredHeight does not not appear to give the correct integral of item heights.
Is there a way to make ListBox calculate the correct integral Height before the ListBox is made visible, so it can be correctly pre-positioned from bottom edge?
Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
ListBox1.Visible = False
ListBox1.IntegralHeight = True
[CODE]...
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Feb 17, 2011
This code bellow to compile a single listBox on form1 to listBox on form2 then listBox on form3.
I want to modified this code to compile 169 of ListBoxs on form1 to 169 listboxs on form2
and 169 listBoxs on form3.Try this code,not need the new coding.
Original code from JoOl and modified by John Anthony oliver
[Code]...
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Feb 13, 2010
1 when my listbox returns resaults it only brings back 10 how do I set it to return lets say 500
and question 2 is when I click on my links in listbox it's not opening webpage as I would expect it...
This is my code
[Code]...
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Apr 28, 2009
I am using VB.NET (version 2008). I have two types of items populating in a listbox (checked listbox). For example: lets say one is type "A" and other is "Type B". Their names maybe same so if the user sees those items in listbox then he won;t be able to determine their type until he click on them and checks out its properties. I wanted that I add each item to listbox and colour them so that blue for example means type "A" is there and red means the other. So this way I will be able to know at a glance that how many item of what type is present. I guess it may not be possible to do that in a standard checkedlistbox. I am also using component factory's krypton controls which enhance the gui of an application. But I dunno if I can progress using that.
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Apr 15, 2012
i am trying to use the if exists command to check if a database exists but it seems i cant declare the "EXISTS" its always giving me problems.i am now using the code with the try and catch if there is an exception it will give a msgbox that will say db already exists.but if there was no error it will say db created successfully the problem is now even if the db exists or no the " finally " condition will excute and show the msg will appear which is db created successfully.on both cases
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Jun 8, 2011
In my project I have add-on .dll files. Right now my DLL is called "FTP.dll". What I was wondering was if there was a way I could make it to check if the dll exists in a certain folder
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Mar 9, 2010
in my database there are 3 tables
CustomerType
CusID
EventType
EventTypeID
CustomerEventType
CusID
[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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Sep 28, 2011
I have a datagridview with two columns: name and str.
i have this inside a for loop:
DataGridView1.Rows.Add(namevariable, strvariable)
this adds a row in the datagridview.
sometimes the value of strvariable could be the same of a value that is already in the datagridview in the str column.
when this happens i dont want to add the row.
basically: if the value of strvariable is already in some row of the str column, do not add the row.
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Feb 10, 2011
I've created a little procedure that I use to verify if a value does actually exist. I'm currently using this all throughout my application for things such as verifying if a control's EditValue actually has a value. I was wondering if I have missed any scenarios where a value would not be available, missing, non-existent, blank, etc., and how would I incorporate in my procedure.
Public Function ValueExist(ByRef CheckValue As Object) As Boolean
Try
ValueExist = True
If IsDBNull(CheckValue) Then
ValueExist = False
[Code] .....
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Jun 22, 2010
This is the code I have
NewCustomerTable.Clear()
NewCustomerconnection.ConnectionString = "Provider = Microsoft.Jet.OLEDB.4.0;Data Source=G:Shop.mdb"
NewCustomerconnection.Open()
[Code] .....
I have a button called btnUpdate and when I click on update I want the program to check to see if the ID number already exists within the database but I cant seem to figure out how to do that.
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Oct 28, 2009
When adding a handler I want to be sure adding a unique(single) instance of the delegate. [code]...
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Feb 3, 2009
I want a if to say like IF "C:Program FilesTEST1 Exists Then do my code how would i do it i have this code so far:
If "C:Program FilesTEST" Then
ProgressBar1.Increment(100)
End If
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Sep 23, 2009
Is it possible to use VB to see if a certain URL exists. For example see if [URL]
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Oct 25, 2010
We have a dataset dsActualCost which fetches query value: MonthName in one column and Cost in another.We have a code to display data in table format.
For MonthIndex = 0 To dsMonth.Tables(0).Rows.Count - 1
Dim tdMonthlycost As New TableCell
If dsActualCost.Tables(0).Rows.Count > 0 Then[code]....
This code works fine when,we have data in all rows.we have no data at all But it gives exception for all other cases.I tried to debug and issue arises when it searches for any row which is not available in DB. Say the dataset has only 2 rows for Feb month,so when it executes line
IsDBNull(dsActualCost.Tables(0).Rows(2).Item(1))
It throws Db null exception.
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Jul 1, 2009
Is it possible to use 2 exists function in 1 sql statement. Below are part of my
select m.ModuleName,sh.Day,sh.Time,sh.Venue FROM Module m INNER JOIN Schedule sh ON m.ModuleID = sh.ModuleID INNER JOIN Student s ON sh.StudentID = s.StudentID WHERE EXISTS (Select * FROM MsgIn WHERE MsgIn.MsgNumber = s.Phone) AND WHERE EXISTS (Select * FROM MsgIn WHERE MsgIn.MsgContent LIKE '%MON%' = sh.Day)
I tried to do like this but an error occured.
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Jul 25, 2011
In my code, I want to check if a referrer url exists and if the referrer url contains a specific sub string. I know how to check for the sub string:
If( InStr( Request.UrlReferrer.ToString(), "some sub string here" ) > 0 ) Then
But I don't know how to check if a referrer exists or not. No refer exists if the url is entered in manually in the address bar. So I tried this, but this does not work:
If (Not (Request.UrlReferrer.ToString() = "")) And (InStr(Request.UrlReferrer.ToString(), "some sub string here") > 0) Then
how do check if a referrer exists?
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Oct 18, 2011
I am working on finishing up a mvc 3 vb.net app... I have to parse about 2000 entries in a database and get the string value to the right of a " : " delimiter from one of the columns... Everything to the left I am not worried about but I need the value that is to the right of the colon for that item.. I have more issues involving needing to select string characters to the right or left of a delimiter... But if someone can show me how to achieve the above I can figure out the rest from there...
a example of the string is Jackson Smokehouse Fish Food:John Jacob JinggleHimer Schmit I would want to eliminate the first part of the string or just select the second part and put it in a variable for later processing...
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May 10, 2009
I'm using the following code (System.Data.SQLite within VB.net)[code]...
I know the table exists because I can write to it via the command line through sqlite and through Autoit and can see it and edit it in the SQLite browser when I open the database. I don't understand why VB can't see it (I know it sees and opens the database file just fine).
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Sep 13, 2009
I have a windows service which fetches data from various datasources and build a XML file and send it to a webservice. For example first I will get customer details from Oracle Database and build the XML file and then the SQL Server database and build the customer details XML. I am planning to use the same function below to build the customer object irrespective of what the datasource is. But dr("age") column is not available in SQLserver datbase How can I check if a column exists or not.[code]
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Sep 30, 2009
I am trying to check if a folder exist, it doesn't work if the folder name has a space or "_" or "-". .
here is an example of cases that don't work:
"Folder test"
"Folder_test""
"Folder-test"
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Jan 29, 2010
I know how to make a new directory on an FTP server, but I wanted to know how I can check if a direcogtry exists, and if it exists display a message?
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Mar 17, 2010
I am using Caspol.exe to install a custom Permission set and add Code Groups for my .Net 2.0 Windows Application.
I have created a Console Application that uses caspol.exe to add Permission Set and Code Groups. I first install the Permission Set and if I do not get an error, I continue to install the Code Groups
Now sometimes I need to add a new Code Group to the client machine, so I make the changes to the console app and it is executed on the client machine. If the client machine already has the Permission Set installed, it returns an error and stops the further processing.
So, I want to know if I can check whether a custom Permission Set is already added or not?
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Aug 4, 2011
How would i just if a website exists, and, if so, launch a browser to open it. I am making a little tool for one of my freinds and it allow then to quickly launch websites. How would I check if that is a valid website to launch, so i don't get an error if it is not valid.[code]The error i want to stop is "Cannot start process because a file name has not been provided."So basically i want to make sure that the program can launch the URL so i don't get this error
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Nov 17, 2011
I cant get the following code to check if my regestrykey exists can some one help. the idea is to check if it exists if so do nothing if not create it, along with its value...
the full key is HKEY_LOCAL_MACHINESOFTWAREVTSAdvanced Offset 2AdminAccess
> If Dir$("HKEY_LOCAL_MACHINESOFTWAREVTSAdvanced Offset 2Admin", vbDirectory) <> "" Then
[Code]....
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