If What You Typed Is Not In The Listbox Collection Than Error Message
Oct 14, 2009
I cannot find how to display an error message when what I typed in the listbox field is not in the listbox collection.
For example the listbox contains the following items
1) Apple
2) Strawberry
3) Mango
If for example I type "Mongo" and then press tab to another field, a message will pop up saying I typed something not in the listbox. Anyone who knows how to code if text in textbox1 is not in listbox then blah blah blah.
View 1 Replies
ADVERTISEMENT
Sep 1, 2010
I have DataGridView display Customers Details. The DataSource are from DataSet. After the user have created a new customer record and updated the SQL SERVER Table, Instread of refreshing the whole DataGridView I am trying to add new rows with data from the TEXTBOX into the DataGridView and it generated this error message: Rows cannot be programmatically added to DataGridView's row collection when the control is data-bound This is the coding which the error was generated from:
Private Sub FRefreshDataGridViewRow()
'use strmode to determine New or Edit existing record
Dim strCell1 As String = CType(Me.txtCustId.Text, String)
Dim strCell2 As String = CType(Me.txtCompName.Text, String)
[code].....
View 2 Replies
Feb 22, 2011
I am working on a small program to find all images on drive and display them using Cygwin commands. I found a code snippet that seems to work well but get a error when I run it. Here is code:
Try
Dim r As IO.StreamReader
r = New IO.StreamReader(workingdir + "\images.txt")
[code].....
View 5 Replies
Jul 4, 2011
i have 3 listboxes and a calculate button and a lblGrandTotalCost, the program works like this when i select an item from listbox 1 and listbox 2 then click "calculate" it shows a result in listbox 3, after repeating this rocess few times if u click the lblGrandtotalCost button it calculates the grand total of all the totals that are in listbox 3, Now i want the program to show an error message if some one click the lblcalculateGrandTotal button when listbox 3 has nothing in it or empty. how do i do that?
i wrote this code but it don't seem to work
If lstGrandTotalCost.Items = "" Then
MessageBox.Show("warning! theres nothing in listbox 3", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Warning)
View 2 Replies
Dec 22, 2010
I have a functioning program that has been completed that based on miles and gallons used, both will display the individual MPG for each single entry as well as compile a total for the miles, gallons used and overall MPG at the bottom.My problem is that when 0 is entered for fuel, the MPG calculation says Infinity and 0 is placed in the gallonsUsedListBox.I've been trying to get the statement "Gallons must be greater than zero" into thegallonsUsedTextBox by utilizing an If..Then statement but to no avail. I'm not sure where to input it or if my avenue of using the If..Then statement is even on track. Here is the code I have:
Option Strict On
' MPG Average
Public Class MPGAverage
[code].....
View 5 Replies
Apr 18, 2011
Is this the most straight forward way to return a typed collection?Here's the key line of code which returns a implicit type of IEnumerable that used to manually loop through to manually recreated a TYPED collection. Is there any native LINQ way to return a typed sorted collection without this recreating of the collection? [code]
View 2 Replies
Mar 1, 2011
Can I use LINQ to return an item in a collection that is the same TYPE as the items in the collection? I am a LINQ Noob trying to avoid looping.
Dim mostRecentlyCreatedQuestionnaire As ParentQuestionnaireItem =
CType((From P In questionnaireCollection Order By P.Metadata.CreateDate Descending).Take(1), ParentQuestionnaireItem)
I get an "unable to CAST" error when I include the CTYPE function. I kind of expected that error, but I imagine that if I coul dnot do this, LINQ's usefulness would be diminished and therefore assume that there must be a way..
View 2 Replies
Jun 8, 2012
I want to create a strongly typed multidimensional array or collection containing the following values from a database:[code]
View 3 Replies
Mar 31, 2009
an error message when I am trying to load the data into a listbox and the value in the table is NULL. I am new in programming and I am using vb2005 Here is my
[Code]...
View 2 Replies
Oct 14, 2010
I am having a problem with the Visual Basic property collection editor .
I have created a Custom Type
Public Class Field
Private Item As Integer
Private Name As String = "FieldName"
[ode]....
View 1 Replies
Mar 14, 2009
I am trying to make an app the will convert messages so if I type "ab" message box shows "zy"?
Public Class Form1
Private Function ggg(ByVal kinglatest) As Boolean
Dim newletter As String = ""
If kinglatest = "a" Then
newletter = "z"
End If
[Code] .....
View 2 Replies
Dec 23, 2009
I have created a client for the popular twitter social network. I am now wanting to add more features to the client, and one of those being a label displaying how many characters are left in the post (as the max is 140). This is what I want to do:
(Message Box Amount of Characters Typed) MINUS (140) = NUMBER(Display answer as label).
View 5 Replies
May 21, 2009
I have Visual Basics 2008 express and I tried to make a autotyper, so this is my
Button1: Timer1.Start
Timer1: Timer2.Start
Timer2: SendKeys.Send(Textbox.text)
Button2: Timer2.Stop
So it was my first try ever with VB and it kind of worked... Only 2 problems;
1. Button 2 doesn't really work, I have to click it really many times, then go to a different window, then click it really many times again, in the meantime it keeps on spamming
2. How do I make my autotyper press enter every single time after the textbox message was typed?
View 5 Replies
Sep 7, 2011
I have the following classes:
Product, Service and OrderItem
Product and Service must inherit OrderItem. So basically I want to store OrderItem object in my shopping cart and these object are store in a list.
Public MustInherit Class OrderItem
Private m_enuItemType As TypeOfItem = TypeOfItem.None
Private m_strUserID As Integer[code].....
View 1 Replies
Jan 8, 2012
How can I disable letters from being typed into listbox?I know I can use maskedlistbox and easily select what can be put into it, but then if I use that can I set a limit to 2 units only?
View 2 Replies
Oct 20, 2009
I know this is a very simple question. But somehow I cannot solve this problem. I have a listbox and a textbox. I want to display the text in the Listbox when typed in a textbox.
View 1 Replies
Feb 22, 2009
how to create an error message by message box to tell the user to enter a number only if they key in a character value?
I MEAN AFTER THEY PRESS THE CALCULATE BUTTON
Private Sub btnCalcFat_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalcFat.Click
Dim intFat As Integer
intFat = Integer.Parse(txtFat.Text)
lblResultDisplay.Text = txtFat.Text * 9
End Sub
My text box is call txtFat
View 3 Replies
Aug 11, 2011
I am getting the error Parser Error Message: The server tag is not well formed. on the code line below:
<asp:HyperLink ID="imgFileType" ImageUrl="images/Icon_Pdf.gif" NavigateUrl='<%#"javascript:ViewFile('erg_", Eval("DocumentName") %>' runat="server"></asp:HyperLink>
I need the url link to be parsed as:
javascript:ViewFile('erg_Invoice_3200_QRG_Restaurant.pdf');
What am I missing in the syntax?
View 1 Replies
Jul 23, 2009
Public Sub VMClim(ByVal table, ByVal tabname$, ByVal tableno) tabname$ has the error all arguements must be explicitly typed, what does it mean?
View 3 Replies
Dec 22, 2011
I have found why this error in occurring but don't know the fix.
I am using Strongly Typed Dataset for my project which is created as a dll for DAL(Data Access Layer)
I have added the Sql Server Table into this dataset using the designer and has created a DataAdapter[code]...
View 1 Replies
Dec 15, 2011
how to comparing the input of the textbox with respect to the given text and the number of error in typed textbox?
View 1 Replies
Aug 31, 2011
I have a class with a collection of objects of type clsCDImage
clsAllCDs:
Imports System.Data.OleDb
Public Class clsImages
Private mAllCDimages As New Collection
[Code].....
View 2 Replies
Oct 17, 2011
I am trying to add numbers. So if there are 2 numbers in a listbox, theyare summed up. If there are 3 numbers in a listbox, they are summed up
[Code]...
What I'm trying to do is to count the number of items. Then I start my counter at 0. For each time the counter goes up, I add another row from the list box. and loops until my counter reaches the number of items in my listbox. I'm stuck intTotal. The only way I know of adding the totals is lstCosts.Items(0)+lstCosts.Items(1)+lstCosts.Items(3). But what if the user enters 4 numbers? I can't find a way around that. I think this should be a very simple question and I think only this line needs to be changed.
View 2 Replies
Jan 12, 2010
I'm in the process of creating my own version of the Combo Box as MS version does not give me the flexibility I need, this is work fine. I just had a little niggle
The List box contains/uses ObjectCollection to hold all its objects, but it does not have the facility to inform by the way of events that an item has been added etc.
If I inherited from this collection could I add the necessary code to make this happen, I have done this in my previous controls I�ve created when I wanted this facility.
View 3 Replies
Feb 9, 2009
I am creating a glossary of words used in a study course. I would like to populate listbox with words entered into an imputbox.
View 8 Replies
May 17, 2012
Currently, I have a listbox lstInventory where I have loaded some database information from a .mdb file. I am able to add new records, and they all display correctly.
Yet, I can't seem to retrieve or access any of the listbox items. (Not trying to reaccess database in here, yet). I am hoping to "Edit" an existing database record by matching it to the lstInventory's selecteditem property. Unfortunately, I am not able to retrieve anything (tried traditional CType(lstInventory.selecteditem.ToString, String) approach, as well as a debug.write approach (which I can't seem to display, even with a Listener-which is another issue in itself).
Furthermore, when I check the listbox.items.count property, it prints out as a "0" [using a messagebox.show()]
I have tried searching multiple forums, but found lots of "database into listbox" threads, and the MSDN website hasn't helped me yet. Do I need to know the collection's name (what would it's name be based on ?)? Or am I not converting the object into a printable/countable quantity?
View 5 Replies
Apr 2, 2009
I'm creating an open-source web browser in VB.NET Express 2008 and I've created a User Setting named History to save a collection of strings for the browsing history. However, when I try to load the history form at runtime, only the first item (of the three I added) shows up in the listbox. Below are both examples of code I have tried to use to accomplish this task.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ListBox1.DataSource = My.Settings.History
[Code]....
View 4 Replies
Feb 26, 2009
I'm trying to create a favorite box in my web browser using this code in Favorites.vb
Public Class favorites
Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
[Code]....
Now I have it so when you click the add button it will put the URL in the string FavList, and place the URL in Listbox1 however I have no idea how to save it, and load it.
So the next time the user opens it, it will have the URL in the string and URL box, so when they click the URL in listbox1 it will redirect the WebBrowser. I think it works like that already I just need to know how to save it, and load it.
View 2 Replies
Mar 17, 2009
Is there a way to to combine line's 1 and 2? I only want to loop through a list of the selected items in this listbox. This works just fine, I just wondered if there was a collection of selected values returned that I could use to avoid having to do it this way.
For Loop1 = 0 To MyListBox.Items.Count - 1
If MyListBox.Items(Loop1).Selected = True Then
...
End
Next
View 2 Replies
Sep 21, 2007
Is it possible to have a texttbox autocomplete source set to a listbox's collection? I see:
FileSystem
HistoryList
RecentlyUsedList
AllUrl
AllSystemSources
FileSystemDirectories
CustomSource
in the texxtbox's autocompletesource property but are unable to make it happen.
View 3 Replies
