I have a ComboBox with
ComboBox1.AutoCompleteMode =
AutoCompleteMode.SuggestAppend
ComboBox1.AutoCompleteSource =
AutoCompleteSource.ListItems
How do you prevent a user from typing characters that are not in the list of options?If the list in the Combo is for example
aaa
abc
acd
How do you stop the user typing ad?
I have a combo box that needs to be autoupdatable. I know you can set the AutoCompleteMode to SuggestAppend and have the combobox suggest as you type values that are in a combobox's items list. My question is this, Is there a way to have this same functionality happen with a databound combobox? I have a combobox that is bound to a Dataset and it will only suggest the first letter typed in the items list. If I type a different letter it jumps to another section in the list corresponding to the new letter typed.Does anyone know how I can get around this and have the SuggestAppend functionality be available in a databound combobox?
View 7 RepliesI have combobox with autocompletemode property to SuggestAndAppend and then i have AutoCompleteSource property to ListItems
Now i must set RowFilter to combobox. After that I set RowFilter and then I set SelectedValue to valid value inside datasource I get InvalidArgument Exception
If i disable AutocompleteMode and AutoCompleteSource I haven't problem
How to use AutoCompleteMode and AutoCompleteSource in datagridview using combobox?
View 5 RepliesSuppose I have the code below;
Private dsOnboardListLookups as New DataSet
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
loadtodataset
[code]....
How can you apply this in datagridview with combobox as [employee code] as id and name as display name. display the position in the 2nd or 3rd column when the item was click or press enter from the combobox and use autocompletemode and autocompletesource in it.
My goal is to populate a ComboBox list when the user clicks it but if the form is not valid I want to capture the event and cancel it so the drop-down doesn't appear (if it's empty).[code]...
View 4 RepliesI have a data in access 2007 which is:
table1
ID DOCUMENTNAME PAGE
1 investment 2000 12
2 investment 1989 4
3 investment march 15
how to display the id and page when user typing the document name in combobox..using vb.net 2008
i want to prevent users from entering numbers and other characters such as (_,"*&^$#).... into my textbox-u know what i mean! I want my textbox to accept only alphabets. I have written a function that is able to check the numbers but i don't know how to check whether the text contains those special characters. Here is my code for the numbers. i'm sure, just as i'm able to check the numbers. i'll be able to check for those characters.
Public Function ValidateText(ByVal GetString As String) As Boolean
Dim Count As Integer = GetString.Length
Dim i As Integer
[Code].....
I have a ComboBox on my form and I am trying to create a SuggestAppend for AutoComplete as the end user types. However, I am getting an ArgumentOutOfRangeException when I press the first letter. Then System.Data.DataRowView automatically populates the ComboBox. [Code]
View 2 RepliesIs there a way to prevent a user from entering data into a ComboBox, rather then selecting, or can anyone suggest a routine to catch and prevent entries so the user can be made aware the they are not acceptable?
View 7 RepliesIn VB.NET, I want to allow typing of non English Characters (For example, Russian, Turkish) in text box. How can I achieve this? Please let me know.
View 1 RepliesI am using third party tool "gridlookupedit" of DevXpress in my application. I have loaded the gridlookupedit control on the key Down event of it. Now if i type a character "A" the dropdown gets loaded with all values starting with "A". Now a step ahead i want to load the GridLookUpEdit only after two characters. for rg: the control must load values only when user types any two characters. If user types "A" it should not load. if user types "Ab" then the control should be loaded by the values starting with "Ab".
View 1 RepliesI need to give a user a drop down list of items to choose from, but I dont want them to be able to type in the combo box, any ideas?
[Code]...
When I typed Private Sub cmdAbc_(Click) and pressed Enter key the first 12 characters erase leaving cmdAcc_(Click) and the cursor on the next line. Then pressing the up arrow or space bar restores the erased characters. This problem makes coding a program impossible. Programs I created before the problem arose do run successfly, but the code for those programs displays with missing characters.
View 1 RepliesI have created a scrabble game that generates random letters. For the user to type in a word using the random letters they have to type it in a text box.
I want my program to prevent users from typing in letters that are not provided in the text box and to allow them to type in the random letters that are provided.
I have a TextBox with a list of filenames in it. The user is able to change these file names, but I don't want them to enter invalid characters, such as slashes or question marks.
I've tried two approaches, but they are not satisfactory:
1. Detect the key pressed with the KeyDown event:
Use e.KeyValue to detect keys like Keys.Oem5 (= backslash), then use 'e.SuppressKeyPress = True' to suppress the key.Problem is, with different Keyboard layouts, The Oem5-key isn't always a backslash.
2. Filter the text:
Use the TextChanged event and do a Replace("", "") on the text for every invalid character (there's 9 of them).Of course this will create 'lag' with every keystroke, especially if there's a lot of text. Also the text-cursor and scrollbar will jump back to the top-left when using Replace.
In short: I'm looking for a way to detect the character that is being entered and suppress or remove it when invalid.
i have an application of developed by .Net, i can use it my computer and other pc but only in one pc it isnt working and it give an error message "Invalid characters found in mail header" operatins system is Windiws 7
View 3 RepliesI am developing an test application to read the data coming on serial port sent by the pabx. It is working fine. But, for some reason , i don't know why, some invalid characters are coming in the data, something like '?'
[Code]...
Well I've recently discovered that trying to create a file with so-called 'illegal characters' will cause your application to crash.. How do I find these characters in a string and replace them with nothing?
The invalid characters are / : * ? " < > | if that helps.
I'd like you filter some results in a grid, and i want the user to be able to type a value into a textbox, and then the grid will be filtered by that value. I don't need help with the grid or how to populate it. My question is in regards to the textbox; How can i tell when the user has stopped typing so i can automatically load the grid? I thought about doing a refresh automatically in the TextChanged event, but that seems silly since the user could still be typing more characters.
View 5 RepliesI am using a Balloon tooltip to show the user which characters are invalid as a filename. I use the IO.Path.GetInvalidFileNameChars array and convert each character to a string, before appending it to a "Invalid filename characters:" string.
vb.net
If IO.Path.GetInvalidFileNameChars.Contains(e.KeyChar) Then
e.Handled = True
Dim str As String = "The following characters are invalid filename characters:" & nl
Dim invalidChars As New List(Of String)
For Each c As Char In IO.Path.GetInvalidFileNameChars
[Code] .....
The result is not pretty: How do I get rid of the 'non-visual' characters (they are probably newlines, backspaces, null chars, etc) so they don't clutter up the list?
Is there a built in way to know when a user is done typing into a textbox? (Before hitting tab, Or moving the mouse) I have a database query that occurs on the textchanged event and everything works perfectly. However, I noticed that there is a bit of lag of course because if a user is quickly typing into the textbox the program is busy doing a query for each character. So what I was hoping for was a way to see if the user has finished typing. So if they type "a" and stop then an event fires. However, if they type "all the way" the event fires after the y keyup. Like measuring the time since the last textchange event and if it was > than a certain value then it would proceed to run the rest of my procedures.
Language: VB.NET
Framework: .Net 2.0
Is there a way to make the textbox stop typing when a user types numbers? I don't want an error message, I'd just like the user to be able to insert 10 numbers and then it shouldn't add any newly typed numbers.[code]....
View 1 RepliesIn an application I have, when a user types in a textbox, the data in a listview is refreshed to reflect what the user is typing.As it stands, it does a refresh after each key is entered.Is there any way to smartly wait until the user has finished typing before initiating a data refresh?
View 2 RepliesI create several controls dynamically with the function createControl which returns a control
....
ElseIf objName = "COMBO" Then
Dim cbo As New ComboBox
[Code].....
I know that my combobox has 3 items (in that case that the value was 2) I found that I cannot call selectedIndex before create the combobox, but I am kind of confuse here. I tried also to add it to the panel and to the tablelayoutpanel and then set the selectedIndex but I get the same error.
I'm trying to create a Select Distinct query, but i'm getting stuck with either an empty combobox either a filled combobox that displays all the doubles.or a message "System. Data. DataViewManagerListItemTypeDescriptor".I have a form (form5) with 1 combobox and 1 datagrid. The datagrid loads 5 collumns "ID", "firm", "Fname", "mname", "Lname".[code]I would like to select the firm from a combobox and filter the datagrid so that it only displays the selected firm and the people that are registred here. Furthermore i want the combobox that i use for selecting the firms to lose the doubles.I can load the datagrid and load the Combobox, but selecting is only pointing to the record (highlights in the grid) i chooses but doesn't filter.[code]I use the "Me.EmployeesTableAdapter.Fill" method so mu question is, is it possible that i don't need to use the OLEDB connection or do i still need this to correctly connect to the DB (access)? I changed the script that i brewed together as displayed above, but this did not do the trick.
View 7 RepliesOn one of my projects, when I try to run it, I get a "Invalid command line switch for "AL.exe". Illegal characters in path." error. I have installed the "Windows SDK for Windows Server 2008 and .NET Framework 3.5," and this error is after installing it.
View 2 RepliesI am currently having a headache on how to solve this problem that i am facing.here is the situation:I have a combobox and a list box on the main form. The combobox will get the data from the ms access database.In the database, i have the details of a person's IC, Name and DOB say for eg on one entry I have D215311523C,SHAWN,13/04/1987
So now, my combobox on form load will show the list of dates in the database to allow the user to search base on the date itself by clicking on the selected date. So when the user clicks on the particular date say 13/04/1987, people in the database whose birthday is 13/04/1987 will be shown on the listbox.Meaning to say if i have 3 entries whose dates are the same 13/04/1987, 3 entries will appear. If there is only two entry, then two results will be shown.
[Code]...
Is there a way to find out if the "TextChanged" event is fired because the user is typing into a textbox or the programmer called myTextBox.Text = "something"? I don't want to react when the user is typing each letter into the textbox so I am using the "Validated" event to catch when the user is done so I can react. The problem is I don't have a way to catch when the programmer does "myTextbox.Text = "something". The only way I know to catch changes there is to use TextChanged but then I don't want to be reacting when the user is typing each letter into the textbox.
View 4 RepliesI need to be able to check from code whether the SuggestAppend List (not sure if that's it's proper name, I mean the dropdown that appears when you start typing into a combo whose auto-complete mode has been set to Sugest Append) is currently showing. Basically I'm looking for something similar to the DroppedDown property but applying to the SuggestAppend List rather than the Drop Down. Can anyone tell me what property I should be looking at?
The reason I need this is I need to do some work when a user cancels an edit in the combo by pressing escape. I've trapped the escape keypress but this only represents an edit cancellation if the dropdown list and the suggest append list aren't currently showing (otherwise the escape just closes the list).