I use check boxes and place them on my user interface (See attachment)I have coded the code for "select all" button :
Code:
Private Sub checkedall_Click(ByVal sender As System.Object, ByVal e As_
System.EventArgs) Handles checkedall.Click
Dim chkboxes, outs As New Collection()
[code]....
I could not seems to check all the boxes. Is there something wrong with it? I am not sure how to assign array to check boxes.
I can tell when the user clicks on my picturebox. Can I tell which mouse button was used? Left or right?
View 1 RepliesI'd like to check for all colors in an image. I've already came up with this:
Code:
Dim lst As New List(Of Color)
Dim img As Bitmap = System.Drawing.Bitmap.FromFile("C:image.jpg")
For x = 0 To img.Width - 1
[code]....
Unfortunately this needs to sweep through all the pixels, and it's EXTREMELY slow... method to get all colors in an image without sweeping through all pixels?
how to enable the "import" button when at least one of the checkboxes is checked.I have two buttons : "Deselect all" and "Select All" for the checking of the boxes, to import the specific files' data they want to Excel. (the files are in listbox, and the checked boxes is for selecting the files' parameters that they want to see in excel)
One option:When the user deselect all, the "import" button is suppose to be disable to prevent the user from importing the files' data parameters.
2nd option:(if i do not want to disable the import button) or show message that they have to select at least one box and at the same time, prevent the import button to work if there's no checked checkbox. So my deselect all button code :
Code:
CO2checkbox.Checked = False
NH3checkbox.Checked = False
DBcheckbox.Checked = False
[code]....
but the button still remain disabled if I click "unchecked all" button and then checked at least one box. how do I enable it?And how do i...show error message and prevent the files' data to be imported when the user click "import" when there's no checked checkbox if I choose the alternative option of using message to alert them without disabling the button and yet prevent importing of data?
PS: If I did not click "deselect all" button but click the "select all" button, the import button is enabled and working.
Im working with MDI parent/child objects. when closing the child objects i need the child to check to see if it is the last child object before closing. i couldn't find anything on google, maybe im searching for the wrong thing.
View 2 Repliesi am programming in vb 2008 and i hav a little problem.I hav added 8 picture boxes in my application and i wana know if i can go through all those 8 picture boxes in a "FOR LOOP". [code] now the problem is that i am not allowed to use "picturebox(i)"is there a way to go through all the picture boxes in a for loop?
View 1 RepliesI have alot of text boxes across alot of forms in ASP.NET programming in code behind pages in VB. I want to ensurethe user does not enter such characters as ' " ( ) or any which could mess up the sql syntax the script makes, and with some will validate what they entered is of numerical value.
Now I know you can stop the text box allowing such characters in a Windows application, but cannot find for the life of me a way of doing such in a web application - and its not really viable to perform a sub-string check at the click of a button for every box
Code:
PictureBox1.CreateGraphics.FillRectangle(Brushes.Yellow, 0, 0, 5, 10)
But rotated 30 degrees? Is this possible and i am not very good at math and all other
[code].....
I have an "array" of picture boxes. I load a default image into them which I need to swap in a loop (very small gif). A bit like this:
[Code]....
I used this code to created 2 combo boxes General and Specific...and Only show Specific (Combo when Combo A is chosen.....What i need now is to know how to assign specific values to the items in combo b (Specific).??? If i chose a sode, Fanta, i want the total price to be $10.00 (this price will show up in the finial price box..
View 4 RepliesI need to be able to add (specific) special characters to text boxes. Problem is, there are five of them spread across two forms and three tabpages. What I'd like to do is bring up a form when the user presses something like "F2" while the text boxes are focused, then on that form would be a grid of buttons. When the user pushes a button, the character is added to the box. How do I get this form to reference the box that called it without passing a global variable or calling a public function? I tried Form3.Parent.Name, but that always seems to refer to nothing. Also, once this is done how can I get it to just insert a character where the cursor on the calling box is? It probably shouldn't even be on a form either since that will take the focus when it's called (which I don't want)
View 3 RepliesMost of my check boxes look like these (on the left of the picture) (ignore the checked check box in the upper left corner , I am not talking about tat one) :However , ONLY on tab 2 the check boxes look differently in both cases the check boxes are Disabled , but they don't look the same . Why is that ? I even tried copying the check boxes from tab 3 to tab 2 but to my surprise they once again looked differently ! This only happens on tab 2 . How is this possible ?
View 20 RepliesAdd Check Boxes Into A List Box?[code]...
View 2 Replies<tr>
<td width=60%><asp:CheckBox ID="chk0" runat="server" /> ...</td>
<td width=40%><asp:CheckBox ID="chk1" runat="server" /> ...</td>
[code].....
I've got a screen with 4 group box and several text box inside them.Each group box is controlled by a check box, so if the check box is true, the group box is enabled. Otherwise, the group box will be disabled.So far, I've been using a 'Refresh' button to evaluate the check boxes values.Now I'd like to give up using that button, so if when I change the check box state, so will do the group box. How could I do that?
View 8 Replies(Visual Studio Visual Basic) many times, and I populate the ListView columns with data using SQL statements that pull data from a database. I'm now trying to use a ListView with the addition of check boxes.
View 4 RepliesI have a Form with a Group Box with a number of check boxes within it, each check box has a text box next to it for the user to enter a number. I wondered if it was possible to loop through the check boxes within the Group Box to find out which are selected and output the value in the associated textbox next each checkbox as it loops?
View 2 RepliesUsing Studio/VB 2010 here and would like to find out how to approach the following. Examples would also be welcomed as I've not yet tried the progress bar control.
Scenario: A windows form will contain multiple check box controls that will be "auto-checked" as other parts of the user application/interface are completed. I would like to show a progress bar on the form that will give the viewer some idea of what has been completed. For example, 5 of 20 checked-off would show 25% in the progress bar.
I have a groupbox with 12 checkboxes(containing months of the year). I need to calculate and display the value in a text box.
For example if one check box is checked then on clicking the button calculate, it should be able to display the value 500 in the text box, if two checkboxes is checked then the total should be 1000, if three check boxes then total should be 1500 and so on[code]...
I have a desktop application by which i have to send mail to multiple recipients. There is a grid view in a form. There are some customer list in the grid view and for each row there will be a check box. User can check or uncheck the check boxes. Also there is a send button. when user click on the send button then a mail will be sent to those customer whose check boxes are checked.
View 4 RepliesI have an array of boolean data that I'm trying to display on the screen using 144 check boxes. Is there an easy way of updating all 144 check boxes with the data from an array and an easy way to update the array when changes are made to the check boxes?
View 3 RepliesI have gridview with checkboxes. I need user to click row in the gridview, then popup the 2nd window which contains the values of clicked row. I can propagate string values, but not the status of check boxes. code is like this UpdateForm.chkboxincomplete.CheckState = dgridview1.Rows(e.RowIndex).Cells(3).xxxxxxxxxx i need to know what to put for xxxxxxx or any other method to do this task.
View 3 RepliesI believe we'll have to loop through all of the checkboxes and then check them. The problem, is that when declaring the variable, I'm not sure how to gather check boxes
For example:
Dim i As New ...
For Each i In Tabpage1
...
Next
There are 15 check boxes in a form. User wants to use tab key and space bar to make checking. The problem is when user hits tab key, there is no cursor moving.I want to add gotfocus and lostfocus to make backcolor changing for check box.
View 11 RepliesThe other day I needed to know how to handle a group of form items in one function, specifically speaking I needed to uncheck all ListBoxes in a group of a MenuStrip when any other was checked. Now I need something similar, except this time it's just a group of check boxes on a panel. heres the code I used for the other purpose.
[Code]...
I have to create a program for customers buying a new care can pick options for that car.The starting cost of the car is $26,000Im having trouble figuring out where to add the starting value. And also, how will i calculate all the options into the total along with the tax.
Public Class Form1
Dim dbltotal As Double
Dim dbltax As Double
[code].....
on my form I would like it to remember the checked checkboxes when it closes.
View 2 RepliesI am using visual studio 2008. I need to use the listview tool with checkboxes instead of the checked list box as with the ListView the properties can be set that the user can only have one choice.
Problem: I am not sure on the code to manipulate what option has been picked. I want it to output the same as the code below. I know how to manipulate a checked list boxes by the example code below:
If (ChkdListChoice.SelectedIndex = 2) Then
LstDisplay.Items.Add("Spicy Chicken - �3.50")
price = price + 3.5
[Code].....
I have seem some threads similar to this but none have resolved my problem thus far.I currently have a gridview that is populated from a database table. There is a check box field within this table, generated from one of the fields being of Data Type "bit". When this page is loaded, the check boxes are grayed out and I am unable to click on them to change.
[Code]...
how to wrap the text in check boxes?
vb.net 2003