Is 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 Repliesi 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
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I am using a database (access) were i am not using a primary key field. I would like to prevent the user from entering records , if certain fields allready exsists.
I would like to check for 3 of the fields. When these 3 fields has been filled previously with the same data as the new data, i want to return a message.
I am looking at the fields txtWeeknumber.text & txtTopic.text & txtSubOutCome.text
Here are some of my
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I have a project that uses a number of DataGridView controls. Most of the cells are of the DataGridViewTextBoxCell persuasion. I declare my controls like so:Dim MyCell as DataGridViewCell Later I specify whether they are DataGridViewTextBoxControls or DataGridViewComboBoxCells like so:
MyCell = New DataGridViewTextBoxCell MyCell = New DataGridViewComboBoxCell None of the places in my code require the ability for the users to enter their own values in the Combo Boxes. That is, they are either hard-coded or the values are gathered from other data within the application.
Currently, users can highlight a combo box control defined as shown above and begin typing anything they like. For example, I have one combo box that offers the user a selection of integers between 1 and 9. I can highlight the combo box cell and enter "Hello, World!" if I'd like.What does it take to disable this ability? I'm sure there's a property, but I have yet to find it. I have searched the Internet, and have found only the ability to have user-entered values added to the list and a stream of data-binding tutorials.
I have this test form where I'm testing the idea, but ran into a snag. Now the main idea is to load all the data from a dataset into the one column of the datagridview. This works perfectly as shown in the image. Now there is something that I want to happen, but just can't get it right. when on the DataGridViewComboBox Column I also want to be able to type in my own data if the one I want is not available in the combobox.
Also if there are 50 values in my combobox and 2 of them are:
jacky, jacson
When I type jac, I want the combobox to only give me the options starting with "jac"
Here is the code that I'm currently using:
Dim dt As DataTable
Dim dsNewDataset As New DataSet()
Dim i = 0, intSetArray As Integer = 0
Public Function JT_PullDataWithCOLUMNS1(ByVal Cols As String, ByVal TableName As String) As DataTable
[Code] .....
I have a data-bound combobox that pulls values from a BindingList(of T). Combobox loads fine, correct values are displayed (I'm not using SelectedItem or SelectedValue). I'm using properties and connecting the data to the control via a bindingsource.
What I want is if the user types text into the combobox, I want the data from the bound table to change to that new text, i.e. edit the bound data directly.
Easy as pie to do with a textbox, but can't seem to get a combobox to work this way.
I was trying to use the validated event of the combobox to write the data to the datasource, but it doesn't fire when I press enter. Is that the way to do it? Can I not link the data to the combobox directly?
how to retrieve data from SQL Database using SQL Connection by selecting the individual value in a ComboBox which the data in the ComboxBox is also retrieved from the SQL Database using DataBound. A 'Display' Button will be clicked to display the data in a TextBox, based on which value the user had selected.
Below is my current
Private Sub displayBtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles displayBtn.Click
'Create Connection
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I cannot get my combo box to populate using a select statement from mysql database.
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I have a datagrid with 5 columns.2 of these columns will have data entered into them automatically - depending on the entries of 2 textboxes.I can disable these 2 columns ok.How can I have it so that the tab key doea not enter the cells of these 2 disabled columns. ideally I'd like the tab to enter the cells of the abled columns only.
View 4 RepliesThe app uses several forms to let the user enter information. In each form the info is entered into textboxes and dealt with elsewhere when the "Enter" button is clicked. A lot if the info entered is used in calculations and so must not contain alpha characters, only numbers. What is the best way of examining each entry and identifying any that are not numbers, so that I can ask the user for a correction with a MsgBox?Prevent Users Entering Letters Instead of Numbers?
View 10 RepliesI have a form where the user chooses a facility and then the list of patients for that facility are displayed in a data grid view. When I click to add a resident, the last name field on the data grid view is highlighted in blue below the last record that already exists.If I try to start typing without clicking in that cell, the facility changes - it looks like the control is still in the facility drop down box. How can I code it so that the user can just start typing in the data without having to physically click in the cell to start entering data?
I 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.
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Title pretty much says it all. Does anyone know a way to to prevent a computer from entering a low/non-processing mode while the program is running? I don't care about monitor modes, screen-savers, hard-drive spindown, etc (in fact, I'd prefer to leave those alone; I like it that it shuts the monitor off after a time period).Basically, I have an industrial program that needs to continually monitor a PCI card it uses for IO; and this activity alone isn't enough to convince Windows not to go into Sleep mode. We normally just shut the power-save features off, but we had an incident where a technician forgot, a customer's machine went to Sleep after the end of the shift, the pumps stopped recirculating, yadda-yadda big mess.
View 6 RepliesI 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 combobox on the form and a datagrid viewer .no i want to display the table which selected on combo box..
View 1 RepliesI would like the user to enter positive numbers (decimal or whole numbers but no fraction) using combobox. However the user can only enter the numbers using a number key pad built in the combobox. The number key pad will appear once the user click the down arrow of the combobox (I am not sure if there any predefined feature built into vb.net 2005 that has this property). The number key pad should contain the numbers 0-9 and decimal(.).
View 2 RepliesHow do i disable user from goto desktop and when they press Control+Alt+Del it must prompt with admin username/Password.Is it possible to do....i have created a login page but i have no idea on how to make it prompt when user press Control+Alt+Del
View 3 Repliesi want to develop a billing software for my net cafe. how to lock the computer before a user entering their name in my Login form?after they entered their name, this form will insert a new data in userLogin table (user_login_name and login_time), and the computer will be available to use.
View 2 RepliesHow can I do it so every time the user loads my application it will automatically (without prompt, or user selecting) upload all the files in a folder i select beforehand and add them into ListBox1
View 16 Replieshave 4 worksheets, need to enabel user to open any 1 by entering date which is name of worksheet?
View 1 RepliesI need to write a code to stop user from entering a duplicate course Id and I am having trouble.[code]
View 2 RepliesI have created an application which asks the user to enter password to login.Now how can i inform the user(if his caps button is on) that his caps button is on while he is entering his password?
View 3 RepliesWhen i select an item in my combobox it raises the following errorColumn 'field1, field2' is constrained to be unique. Value 'test1, 1' is already present.The combobox is bound to the table to populate it with values from field1 witch is the first part of primary key of the table. (field2 is secont part of primary key).
View 1 RepliesI am working on a small concept but since i am a novice in .net i am not getting the concept.I have 2 controls on the page.1st is Text Box: User enters the int value and that value is checked from database. In database there are 3 fields. One for ID, second for int value and 3rd for country.If the text box value in database is associated with country US then it should show US in 2nd control ( can be text box or combo box) in UI. Else for anything else it should show London.
View 3 RepliesHere's how I'm trying to manually select a specific item in my combobox. cbEditCategory.SelectedIndex = cdEditCategory.Items.IndexOf(editItemCategory) I setup a msgbox to show "cdEditCategory.Items.IndexOf(editItemCategory)" and it's reporting -1. Why is it not giving me the right index?
View 2 RepliesThe problem I have is I have made a program which you select a value from a combobox and it changes the value of a url for a picturebox and thus changes the picture, I also have a button which randomizes all of the comboboxes so I will get something unique, but every time the program loads, and I hit random, it chooses the same numbers in order. If you need an example, when I press random the first time I get the number 7 for my first combobox, so the selected index=7, every time I load the program and press random it picks 7 for that combobox.
View 4 RepliesI use a printcode in a Class, and a printcode by the Button in the Form.Olso i have a code for fill the ComboBox, with al printers.Is it possible to do a selecting in the ComboBox, with as results that the print go to that printer.
Class
Public Class formCapture
Private Shared img As Bitmap
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how to make a VB program where, it'll have 2 textboxes, one username and one for password, and when the user enters in the information, it places it in the corresponding box on the website.
I'm making a program for a friend and his website, and this program is designed to allow the users of the site to download it, and use it to check if there are any updates (Friends, Mail, Forums, etc).
The code I have right now (which I tested to checking my IP) is:
Dim req As HttpWebRequest = WebRequest.Create("http:whatismyip.com/automation/n09230945.asp")
Dim res As HttpWebResponse = req.GetResponse()
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Entering data on the listview?
View 2 RepliesNow, when the user starts typing values (limited to numbers only), I want it to go like the following:[code]As you can see, when you start typing the values, start with the space on the far right and then move towards the left with each additional number entered; I guess it's similar to the way a calculator accepts values, only I need it for entering time (i.e. mm:ss).Right now I have to enter all the numbers including the ":" between the values and the values entered are saved to a database.Also, should I be using a TextBox for this or is there a better way of displaying/entering the data.
View 6 Replies