I have VB.NET code that is called when the selected tab index of a tab control changes, I am trying to get the code to change the text in a text box to the URL of the web browser control that when the tab changes. I have the code below, however it gives errors:
AddressTextBox.Text = CType(TabControl.SelectedTab.Controls.Item(0), WebBrowser).Url.ToString
My client wanted to have a textbox in the Customer form of the application, which offers the applicable endings to a started street name. He starts to type a street name and the textbox offers a list of streets which start with the char sequence he typed into the textbox. Textboxes have the AutoCompleteCustomSource property and even though a list of common street names will be longer than it could be pre-filled on start, I could just hit a database with a query, populate an AutoCompleteStringCollection and show that to the user.
Now here's the thing: If I make the list populate on every keypress/keydown whatever, the program crashes and throws an AccessViolationException. I've found out that that's because: The control is in the middle of showing the AutoComplete list when at the same time it is being modified, resulting in the crash. When you refresh the Autocomplete List, the control is recreated with new pointers. Keyboard and mouse events (KeyPress, MouseOver, MouseLeave, MouseHover) attempt to reference the old control's pointers which are now invalid in memory causing a memory access violation to occur.
The underlying AutoComplete implementation does not allow for changing the AutoComplete candidate list object once it has been set on a window. To allow changing the list, WinForms destroys the Edit control or ComboBox and recreates it. This causes an exception if the underlying control is destroyed while the AutoComplete window is still use it. I read about this on MSDN, their resolution: Do not modify the AutoComplete candidate list dynamically during key events. I know that you can do this by creating a custom control and such, but can it be done with just pure coding wizardry?
I have a ContextMenuStrip attached to a TextBox
Dim TelTBMenu As New ContextMenuStrip
With TelTBMenu
.Name = "TelTBMenu"
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Whilst the form is loaded this runs fine twice, but then although the Setting boolean is reset the ToolStripItem text remains unchanged unless the form is re-loaded.
I have a strange behavior with a dynamically created TextBox-Control. The control is created in the handler of the Load-event of a dialog-form like this:
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Now the situation is, that in most cases it works fine. But a few of my customers report that the TextBox not appears on their dialog - it's not there! That's all, nothing more to say.hints or reports about known pitfalls with dynamically created controls which could explain this (sometimes) strange behavior and how I could fix it (I have to create this control dynamically due to some reasons).
BTW: The program is built with Visual Basic 2005. And the customers with trouble are spread about the OS's (XP, Vista, 7).
Private Sub TextBox1_() Handles TextBox1.MouseDoubleClick
TextBox1.Height += 15
End Sub
Private Sub TextBox1_TextChanged() Handles TextBox1.MouseWheel
TextBox1.Height -= 15
This code seems to work ok for dynamically controlling a textbox height. Would like to know if there is a way to have the textbox height auto size to accommodate each entry. Autosize does not appear to be a property of textbox.
A] Is there any way of stopping a user from entering text or changing text in a textbox without disabling it or
B] Is there a way of changing the texboxes back and fore color whilst it is disabled?
I have tried the following for changing backcolor and forecolor of each textbox in the form cant cant do the same for changing the font size
Here is my code'[code...]
I want to change some text inside a textbox when a checkbox is checked. I tried many things, but none seems to work. I need that, when checkbox gets checked, the textbox value gets deleted from backwars until a dot. Then, place another predefined text immediately after this dot.
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I am new to Visual Basic 2010, but I have been trying to make a line reader with an imported text document into a RichTextBox through an internet source.
I want the RichTextBox's line zero (the first line) to really be line one, but without changing the text in the TextBox to show the change. In other words, I want that change to happen in the background of the program.
I have tried... taking the text from one TextBox and putting it into another, while subtracting an integer value of onean attempt to use a timer to copy the text from one TextBox to another to read the line properly.
I have tried a couple of other things too, but most of them were much more complicated and I could not really explain what each thing did.[code]...
Here is my
Private Sub Add_Click
Dim tbox As New TextBox
tbox.Location = New Point(12, 244)
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I added a textbox dynamically during runtime. How will I add the text in the textbox to my database? The name property of the textbox cant be change. What is the name property of the texbox created during runtime?
How do I add text to a TextBox instead of changing the textbox as a whole. Also, how would I make a newline when adding to the textbox?
View 5 RepliesI'm making a C++ code editor application using VB.NET. I'd like to change the color of the keywords as the user types it. Also I'm looking for a way to highlight some lines of the code.
Is there a way to change the forecolor and backcolour of a piece of text inside a textbox or a rich textbox?
Is there a way to specify the color of the text in the tabs of a Tab control ? The text is black but I'd like to change it .
View 1 RepliesWhen a SelectedIndex in a ListBox is changed I would like a textbox below the listbox that gives a description to be populated with the value from a description field in SQL.I have the following code so far, but I get an error that says "Must declare the scalar variable "@ReportName"
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Is there a way that a label's text is updated each time the input of a textbox changes? The textbox and the label are on the same form. I looked everywhere but didn't find a solution that worked.
View 10 RepliesI am adding controls to a page programatically in the code behind. I add an asp:Label and set it's Text value. I add an asp:TextBox and set it's Text value. Both Text values are returned in the Response and displayed in the browser. All fine so far.
The user performs an action that causes a postback. I re-load the dynamically added asp:Label and asp:TextBox. When the Response is returned to the browser, only the asp:TextBox Text value is displayed. The asp:Label Text value is not. If I inspect the HTML I can see the asp:Label control (rendered as an HTML span tag) but no value.
How can I get the code to automatically re-load the Text value of an asp:Label on each postback? Why is the behaviour different for an asp:Label and an asp:TextBox? I do not want to have to manually re-set the Text value on each postback.
Here is some code similar to what I am doing (placeHolderNameplates is an asp:PlaceHolder control on the aspx page): Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init
If Not Page.IsPostBack Then
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I am using custom textboxes and I need to be able to set the Text on txb1 based on the Text of txb2. I have simplied my code to the following:
Public Class customtextbox
Inherits TextBox
Public Event ControlReset()
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So, when txb1 looses focus, if its Text is "fried", then it sets off txb2's ProcessAlert function. I had tried to change the value of txb2 Text in ProcessAlert function, but didnt work, so I tried to get it to raise an event instead, which then tries to set the Text property. However I still cant set txb2's Text property. The Text property seems to be set for the duration of the "life" of the Event handler. When I step through the forms controls within the Event handler, the changed Text value is there, but not outside of the Event handler.
Is it Possible for me to read text from textbox control and write it to .txt file at specific location.
for an instance.... say below with quote is my Text in .txt file:
"THE QUICK BROWN FOX JUMP OVER THE LAZY DOG"
and with programming code I want to change some text in the same sentance become....(see below)
"THE QUICK GREY FOX JUMP OVER THE LAZY CAT"
so you can see the word BROWN change to GREY and word DOG change to CAT
we're working on a billing systemCurrently I am working on the categories module. Here's the thing:I need a dynamically changing UI. So the user can add categories, delete them and teh UI would accordingly add or remove controls automatically.I used DataGridView, but since the fetching and storing of data will not be done in a database, I need to fetch it and update it using an HTTP API, the data bindings are causing problems as I need to update, Insert or delete data using functions instead of letting VB do the hard work. I tried creating a datatable and checking for changes everytime user added/deleted/changed a row, but again the problem is: in a datatable I am not able select what type of control represents the column. For Example I have a parent category column where the control needs to be a combo box. The datatable's columns don't seem to provide an option and are automatically set to text box.I am thinking there is a really cool way of doing this that I am unaware of. all the VB.NET books I have read only seem to use DataGridView in conjunction with some sort of a database and not independantly.
View 4 RepliesHow to set up a Chart using the new MS Chart control. I want to be able to populate the data via SQL because the user will be able to dynamically change the values via drop downs. The format of the data will be the same (Qty, Time Period) but the Focus of that data will change. I'm honestly not sure where to start, I can draw the chart but I have no idea how to populate it with data via code so it can be changed dynamically.
VBE 2010, and I'm hitting an AccessDB
I'm making a button that will create a textbox, and label dynamically.
I have it creating both, but when I try to set a font on the label, it disappears.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
NumBox = NumBox + 1
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When I remove the line that sets the label's font, it shows up, but in the default font.
I have made a program wherein you the labels are dynamically created with a press of a button. if you press on the label, the label would then change color from white to blue. my problem is that how will you make the backcolor of the label change when the button3 is pressed.
here are the codes. placed the whole thing since I dunno if you guys would understand what I mean.
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PS here is the link to what my program looks like. link to my program . the button3 in the image is Reserve Seat.
I have the following table row on my .aspx page.
Initial Requirements:
<ItemTemplate>
<td valign="bottom" id="ReqStatus" runat="server" style="background-color: Gray">
<%#ReqStatus(CType(CType(Container.DataItem, System.Data.DataRowView).Row, DataSet1.DataTable1Row))%>
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I can change the color of the return value based on conditional statements but cannot figure out the correct syntax to change the table cell back ground. My attempt is commented out.
How do I correctly declare the table cell? Findcontrol must not be the correct way.
I have a DataGridViewImageColumn that should display an image for only certain rows. After I bind a generic list of classes to my datagrid, I loop through each row and update the image cell with an image that is an embedded resource for the rows that require the image. This works great if the form has been fully loaded. However, when I attempt this on form load the image doesn't show up? I also can't perform simpler things such as changing the row background color on form load. Should I be performing this logic in a different event after form load?
For i As Integer = 0 To dgvRoles.Rows.Count - 1
Dim imageStream As System.IO.Stream = Nothing
imageStream = Me.GetType().Assembly.GetManifestResourceStream("MyApplication.Timer.png")
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I am adding a grid of buttons to a form at run-time, and all of then use the same Handler.My question is : Is there any way I canadd the TextBox at run-time ?I know how to but without it on the form, the IDE isn't very happy about the "MyClick" Sub - TextBox1 is not declared......
' some logic here to make nice rows and Columns of buttons
' with different .Text and .Name
Me.Controls.Add(btn)
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I am working in vb2008. I have a series of textboxes on a form that I am using for my application. I cut and paste information into one of my textboxes as a description for the record. Most times the information is simple text but sometimes the text I am pasting is formated with carriage returns and special characters. I need my data to always go into this textbox unformatted.
View 1 RepliesQuestion 1: Is there a way to indent text in a textbox control? E.g. user input in textbox starts on position 2 and not on 0 (next to textbox border) Question 2: Intro: Outlook 2007 Calendar -> Day section has a nice feature: onmouseover (wait 2 seconds) and it shows a rounded and custom textbox (with indent). If you click on it you can set an appointment directly without having to open the appointment/scheduler form and fill out appointment details. Also this custom made textbox or panel whatever it is, shows markers allowing it to be dragged over the screen - selecting multiple hours...
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I have a routine that iterates thru a collection and I want to print each iteration into a TextBox without having the second iteration overprint the first and so on. How do I position the text cursor between each iteration thru the 'For Each' that I am using?
View 4 RepliesI'm trying to make a program with transparent labels over pictureboxes and when I set the label Parent to the PictureBox the position of the label changes.
View 2 RepliesI am attempting to send a string to a textbox in the webbrowser control and the page I am trying to do this with has random name= and value= fields which makes it difficult to use the typical methods for placing text in the textbox. I have spent quite a bit of time searching and attempting to figure this out and I'm stumped.
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