I am using the following code in the load event of my form to populate autocomplete string collection but it gives me DBNULL error. Is there any other workaround where it skips DBnull values?
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In Key Press Event i have put the logic of search in textbox, when i press enter key it will take the values from textbox and brings the data in DataGrid.In another event of GotFocus there is an logic of autocompletestring collection from Table. If i type a in that textbox it will shows all the suggested string in that.
If i comment the logic of GotFocus Event for textbox for autocomplete suggestion then only then Key Press events work else its not working. I dont know why its happening.
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I have made taken one textbox in form, in which i have written following logic in Got Focus event.
When i focus on that its automatically showing all the suggested name from database field.
Private Sub CustomerName_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles CustomerName.GotFocus
da = New SqlDataAdapter("Select CustomerName from CustomerMaster", myConnection)
da.Fill(ds, "CustomerMaster")
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Dim dt As DataTable = MyClass.DatabaseRecordsetCall()
Dim str(dt.Rows.Count) As String
If dt IsNot Nothing AndAlso dt.Rows.Count > 0 Then For Each row As DataRow In dt.Rows
str.SetValue(row.Item(0).ToString, dt.Rows.IndexOf(row))
Next
End If
This is the code I am using to populate a string array to use as an autocomplete source for a textbox.The datatable has 17 rows in it. However, it creates the string array with a length of 18.Just an FYI, if you try to use an autocomplete source that contains a value = nothing, it will cause your application to crash.No, not cause an exception which could be dealt with, but a solid inexplicable, pull your hair out, scream and curse because you cannot figure it out crash. The microsoft message that comes up references the file browseui.dll.The above code as is, will generate an extra array value whose value WILL equal nothing and cause this crash to happen.
I have a question about drawing a string on a picturebox in the form load event. So I have a picturebox on a form and in the form load event of this form I have this code:
Dim gx As Graphics = PictureX.CreateGraphics
Dim f As Font = New Font("Arial", 8)
Dim brr As Brush = New SolidBrush(Color.Black)
' Add the copyright text
gx.DrawString("1", f, brr, 2, 5)
But when I load the program nothing is drawn in the picturebox. Is there something wrong with the code or should I use the paint event of the picturebox?
By the way I also used this code in another program and there it works flawlessly, everything is drawn in the right place there when i load the program.
<Visual Studio 2008 / VB.NET /SQL 2008>. I have a form that populates data when Load event occurs. The problem is it looks like a slow motion movie when the form is loaded since there some quite amount data is populated. This is happen because I put a coding to populate data on Form Load event. Is there anyway that I can prevent the slowing down of form load event? I guess best thing is load form completely and trigger populating data.
View 3 Repliesi have a string = "/a/value1/x/valueforx/b/value2/c/value3"
the keys a, b, and c can be in any order in the string that is coming in and will always be separated by a slash.
What i need to do is to find a, b, c and then add their values to a collection
I am using VB.NET for Windows applications. What is the difference between Load event,Activate event and Enter event in the Form and in which order the above event is executed.
View 2 RepliesI'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
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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
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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.
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.
I'm trying to execute different code depending on the button clicked (button 4 or 5) on Form1, but when I click on button5 to activitae the code on the Form2's Load event everything is Ok, but when I click the back button to return to Form 1 and click on the Button4 to activate the code on the Form2's Load event again, it doesn't active the Form's Load event, is there a way to form the form load event every time I access it from Form1? [code]
View 7 RepliesMy screen tends to seize for a few seconds while the list boxes are populated.I moved the call to the List Populate procedure to the form's shown event.This improved the performance slightly but not enough.Is there a method whereby I can ensure the form is fully loaded and displayed before the lists are populated?
View 6 RepliesI have two forms. Form A and Form B. Form A has a datagrid that is populated from a SQL Database Table query. When a button is pressed Form B is launched that allows you to add a record to the database table. I need for the datagrid to be refreshed and show the newly added record when I close form B and go back to the parent.
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I fear that there is something obviously wrong with my code, but I have come across a situation where the Form.Load event is not firing when I create and show my form. The form is not subclassed (as I've seen some problems with that in some searches), and I am not getting any errors thrown when I step through the code in the debugger.
I have a break point set on the IDE-created form load function (which does have the Handles MyBase.Load signature suffix) but the breakpoint is never reached and the form does display and work.The form is passed three arguments in the constructor but the IntializeComponent() function is called before anything else is done.
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My form load event is not running. How do I track down the coulpret?davidbell
View 1 RepliesI want one form frmFrontEnd to be the base of my application, so when i press F5 it is the first to 'open/be seen' and then from here using previous i want other forms to open. How can i set frmFrontEnd in the form load event to be the parent form? If you're not living on the edge, you're taking up too much room
View 1 RepliesI have a form and initialize some global variables on its Load Event. There is a TextChanged event in one control (a textbox) that uses that value. The TextChanged event of the control is triggered before the Form's Load event even if I do not change anything on the TextBox, it looks like that happens when the control is loaded. Why is it doing it before the form? and what event can I trap in order to assure it's the first thing that happens?
Its as simple as this:
vb.net
Private Sub PackOutMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ActiveFlag = False
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My guess is that the msgbox should not appear until the flag is set to true somewhere in the code and then change the contents of txtUser, but it is shown before the form.
I have problem with my combobox and suggest list poping up. Im taking data from datatable then i start to type and list is poping up if i select item form that list by moving arrows up and down and then press TAB than all is working ok but if I select item by clicking mouse then the item I choose doesn't show text but empty field.
View 9 RepliesI'm looking for an event on a form that fires after Form.Load. Specifically, after the form has been displayed. Is there one?
View 3 RepliesI am writing a program in vb.net I have to call an exe(printstatus.exe) in form load event. I successfully called exe. But I don't know how to kill that exe (printstatus.exe) when an user is logged out.
View 1 RepliesI was having a problem with the debugger not stopping at breakpoints. After a lot of work that yielded no results, I realized that the problem was occuring in the form's load event and subs called from that event.
The problem is that it appears that the load event is not being called. Other startup forms in other projects in the solution seem to be working ok.
what could be keeping the the Load event from working?
I have the following code in the Load event of my form and the 3rd statement obviously fails. My question, why does the code fail and not tell me about it? In other words, it fails and then simply displays the form without crashing. It also doesn't execute my 4th statement.[code]...
View 12 RepliesI write a code in My Form Load event as:
txtPassword.Focus()
But it is not focus in my txtpassword textbox . i focus 0 index txtUsername textbox. How i define to focus a control when form load
so I have the following
Try
Dim username as String = My.Application.CommandLineArgs(0)
Dim password as String = My.Application.CommandLineArgs(1)
Catch
Msgbox("Cannot launch")
Application.Exit
Exit Sub
End Try
I placed this in the form's load event. What I want is for this check to run before the form even loads.If an error occurs, the msgbox comes up and the form is never seen. When I try the code now, the form comes up the msgbox shows. When the user clicks OK the form closes. I tried placing it in the form's designer but the designer tries loading the form any way. How do I get this check to run before the form shows?
I am making the Transition to VB.Net (using VB.NET 2010 express) and I have a simple problem that is driving me crazy. I wish for my Form when it Loads, initialise and then call a sub and do some stuff eg perform a plot. If i place a button on the form and click it the sub works fine.This task was simple to do in VB6 but for the life of me I cannot get it to work in VB.NET. Has the Form-Load event changed in some way with .Net?
View 4 RepliesI have a calculation project with 6 forms. The last form shows all the input and output data from the previous forms. This is accomplished in form6 load event. Form6 contains about 40 controls (mostly textboxes, labels and few pictureboxes), populated in this way:Textbox1.Text = Form2.Textbox3.Text, etc.I am not sure if this is a good practice. I know I can use the DGV, but it does not suit me because of the graphical reasons.
View 1 RepliesI have one form (FormA) that fills a combobox with data when the on-load event is trigged.In that combobox, I can select "New value" which opens another form (FormB) on top of FormA.On FormB I add the new data and saves them to a Database.Everything OK till here.I then close FormB.... and return my attention back to FormA.Now I would like to reload data into the combobox, but everyway I have tried, it will not work.
View 5 RepliesI have a web form called "AdminHome" in it in the Page_Load() i have added
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I have one form called invoiice1.vb In the load event how can i call another form ? I also call some values of thatt form
View 2 Replies