I'm having trouble with this line of my code throwing an IndexOutOfRangeException.
intArray(intRandom - intUp) += 1
Its in a For loop that generates random numbers then counts each instance of them given a user upper and lower bound + number to generate.
The loop:
For intCount As Integer = 0 To intGen - 1
intRandom = rnd.Next(intLow, intUp + 1)
intArray(intRandom - intUp) += 1
Next
I have a global intArray() and then a reDim intArray(intUp - intLow)
intLow, intUp, and intGen are where the user upper and lower bounds are stored. Any help on why its throwing this would be appreciated I'm pretty new to this and can not figure out why.
I want to run an if before updating a form view; if yes then..."message" & cancel update queryif no continue update query.i've tried this but i'm getting a "obeject instance not set to null instance......" on the first line of the if? and the item updates regardless
Private Sub FormView2_ItemUpdating(sender As Object, e As System.Web.UI.WebControls.FormViewUpdateEventArgs) Handles FormView2.ItemUpdating Dim status As TextBox = FormView1.FindControl("ApprovalStatusTextBox")
i have a form that displays data from a VIEW on SQL server. Now im told various things about views, some say you can update fields via a view and others say you cant, ive searched the web and my conclusion from that is "it depends" My VIEW is of two tables in the same db:
Grid View is getting values from a XML & XSLT file. What I want to do is, when user selects suppose Computer Programmer from list box, the grid view should get updated with the results of only those have this program. How can I do this? Do I have to bind the xml with List Box?
"I've wrote a code that accesses data from MS SQL server in DATAGRIDVIEW in VB.NET.the problem is whenever i save the changes back to the database, changes are not reflected back
:( I am have been trying to update changes from my vb.net program to an access database file and it simply will not work. I have am using table adapters. I'm not familiar with SQL so i can't go that route. It updates the dataset fine but not the database...
I have pasted my code below. Private Sub BooksBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BooksBindingNavigatorSaveItem.Click
I have a program that uses a database for all of its information. The program is just an easier way to understand all of the information.The user uses 1 of 4 search options (FName, LName, MemberID or Startdate). Depending on what they search for depends on which members are displayed in a data grid view.
Upon selecting the desiered member from the data grid view, information about them is then displayed. This information has been split up over 3 tabs called member information, Attendence and payment history.
That all works great. So I now go to the Attendence Tab and wish to update this members attendence by selecting a date from the date time picker, and select the Add attendence button.This also works fine, the attendence is update but the attendence data grid view is not updated automatically.
I have to select the member from the first data grid view to run the code to refresh the members information.So I thought, call the PopulateAttendenceHistory Private sub again and have it update the data grid view... but it still doesnt work.
i have a datagridview that is pulling information from a access database. The tables being queried is called "History" I can pull data and update data with no problem, however if i edit the date field i get the following error "Syntax error in UPDATE statement" my code is below.pulling from access
i have datagridview populated with stock code, name and description.And i have docked my datagridview to the bottom. so whenever the form is resized, the bottom section will be occupied completely with the datagridview.But i want to display one extra empty column and multiple empty rows to completely fill in the datagridview.The extra empty column width will be adjusted to the right end side of datagridview.And the no of empty rows will be generated based on how many is required to fill up to the bottomSo that i can create datagridview with full column and row even though some columns or rows are empty.
I am currently working on a Database that collects information. Firstly, i use a new windows form to collect that data. I have it set up to where, when the form loads, the database is ready to collect the information fields. And then the form closes on the button click to add that data, it does not update that data table view. It adds it once i close the program and debug it again.
Code: (Open the windows form) Private Sub btnAddNew_Click_1(sender As System.Object, e As System.EventArgs) Handles btnAddNew.Click AddNewClientData.ShowDialog()
[Code].....
Problem two: I need to make a button that will increment a cell that was set as an Int, by one, but can't figure out how to put it into code.
when the user clicks on the add button another form launches, which enables the user to add student info such as name, address, course, start date and end date, this information is then written to class when the ok button on that form is clicked, and then displays the data on the initial form in data grid. the user can add multiple entries and they are all displayed on the intial form and a the data grid is populatedwhen any of the rows in the displayed grid is selected, and the update button is clicked then the same form launches as the previous one and but this time its in the update mode and pre populates the form with the inital values.
I have two forms....Mainform is filled with controls that are databound to a datasource.....then I have a child form that is used to edit data from parent form.......the data that is displayed on the child form uses the Filter() method of the binding source to display data only for the customer selected......
The child form has the standard OK and CANCEL buttons set up as dialog result.......after I edit the content in child form, the changes are displayed on the child form correctly......but when closing the child form and going back to the parent form the changes dont appear there unless I restart the application.....I also tried adding the tableadapter.update/fill method in the 'OK' dialog result event handler and it still doesnt work......
How can I make the changes take effect on the parent form without restarting the application?
I have mdi application, on main form which is mdi container and has a tree view. i open the child form on afterselect even of treeview. the issue i'm facing that i open the form but focus remain on tree view until i click on the the form. my question is how i can give focus to form rather it stays on treeview. i tried frm.focus also activatemdichild(frm) no sucess.
does any one now how i can make my database come up in a wmi view so for examples if i clicked on a server name it will bring the server details up in a WMI view please and i am using VB.net 2008.
How can I get a control to slide into view onto my form? It could be a button, panel anything. I just want it to look like it slides in from one of the sides.
I am working on a Windows Forms application in visual basic and one of the features is that it is supposed to access www.usps.com/zip4 and fill in the fields and then display the page in a window with auto-filled fields for the user to edit and submit. Basically I instantiate a WebBrowser, I find each of the fields (two text and a drop-down list) using the webbrowser.Document.GetElementById(id).setAttribute("value", newvalue). I do this for each text field and for the drop down I used setAttribute("value", val) and setAttribute("selectedIndex", index). After I'm done, I attach this webBrowser to a form that I created using form.Controls.Add(webBrowser) and then I call form.showDialog(Me). I have been getting really erroneous behavior. First of all, when this function is called the first time, all the text fields show up ok, but the selection field stays at zero. Neither changing the value nor the selectedIndex changes the actual selection in the drop down list when it's displayed. Then, if I exit this window and have the function called again, all the text is gone and the drop down list appears to be updated with the correct selection; however, it can't be because when I fill in the information and click submit, I get an error saying that I must select a state.
I'm having a problem with my forms. Basically I have one form that adds,deletes,updates transactions that are made when a registered member makes a request. Doing this then gets saved in the database under a transaction table. I then have another form which then calculates my transactions based on when the member returns the DVD or CD. However, if say for example I wish to delete a transaction record, the form that does the calculation of the fines doesn't update itself.How can I solve this? If im able to create a refresh button on the fines form wou if so how will it work as my form contains 1 combo box , 5 text boxes and 1 date picker(however the date picker is not linked to the database)?
1)This coding here is to do with "Adding,updating, deleting and saving Transaction": Public Class PDL_Add_Transaction_Form Dim flag As Integer
We are designing a toolbar to be used in PowerShape that was originally written in VB6. We are beginning the conversion to VB.net and for some reason, when we size the new form that is the actual toolbar, we can see the size change in Design Mode but when we run the debugger it does NOT show the newly sized form. We managed to get the Width to update after clearing the Debug and Release directories but not the Height... And even then it only works once then we have to go back in and clear the directories again in order for the width to update.
I have a VB.NET 2010 app I am writing that does a lot of work on a RS485 bus in 2 seperate threads. These threads are started as soon as the app is opened and run as long the app is open. I would like to have the threads update labels on the main (and only) form every so often based on what's happening on the serial bus. I know it involves invokes and delegates but I haven't found a straight forward answer on how to implement it.
