Override Textbox Properties Like Selectionstart Property?
May 25, 2011It is possible to override textbox properties like selectionstart property
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SelectionStart Property Not In Textbox Control
Aug 19, 2009I'm trying to use the SelectionStart property in a textbox (VS 2003, SP1). The build doesn't flag use of the property, and the app runs, but the SelectionStart code just doesn't work: Textbox1.SelectionStart = 20000 (just want cursor to go to the end of box, and there are never that many characters in box)
The object browser reveals that the SelectionStart property is not included in the System.Windows.Forms textbox control I'm using. SelectionLength is there, but not SelectionStart. The control is inherited from TextBoxBase, which does contain the property -- it just isn't translated into theTextBox control. MultiLine is set to true.
[Code]...
VS 2010 Override Text Property In Textbox?
Aug 9, 2011I just start working with VB. In a programme I need to keep the value in text property after programme closed.That is why I want to change (override) Text property in TextBox.Then this value will be default value when I open the programme again.I will assing a value to textbox1 in a Sub.
Sub button1_click
Textbox1.text="ttt"
End Sub
Then I need to change the Text value under "Properties" window.TextBox1 System.Windows.Forms.TextBox
I think there is Get-Set method for property override but I dont know how to use.How can I do that?
.net - Override A Class/add Properties To A ListviewItem?
Jan 12, 2010I have a listview but I would like to add 3 properties (for example one of them is "image") to the listviewitems in it. I was fine with making a custom class with the 3 properties and just inheriting ListViewItem but now I need to use MultiSelect, so it means doing things like(in For Each loops):
ListView1.SelectedItems.Item(i).Image don't work because it returns a ListViewItem not my CustomClass. I could always do : Ctype(ListView1.selectedItems(i), MyCustomClass).Image
But using that over and over again seems like a waste/wrong way to do it?
How To Override SelectedItem Property
Mar 5, 2009How to override the SelectedItem property? When you look at the description of the SelectedItem property, the description shows as:"Gets the selected item with the lowest index in the list control". I would like to bypass the "lowest index" portion of the property...I have multiple items in the same list with the same value, but different text. I just want to set the SelectedItem to the actual item I've selected, not one with the same value that appears earlier in the list...
View 16 RepliesHow To Override Dataset.Desinger Property
Nov 20, 2009In my project, I have a table that has an image column, but with vs2008 it stores the image as bytes. I have the column set to allow nulls. When I save my image I convert it to a byte array. Then when I retrieve that row, I convert the byte array back to the image, no problems. The problem is when there is not an image selected I return Nothing to the datatable, saves ok, but when I try to retrieve that row, The dataset.desinger throw the "value in column dbnull". I can temporary override this error with a code change in the dataset.designer, but it does not stay permanently. How can I override the dataset.desinger property permanently.
Original dataset.desinger code:
<Global.System.Diagnostics.DebuggerNonUserCodeAttribute()> _
Public Property Image() As Byte()
Get
Try
Return CType(Me(Me.tableCustomers.ImageColumn),Byte())
[Code] .....
All I did is add the if statement capturing the dbnull and forcing it to return Nothing instead. When I close VisualStudio, then reopen this change is gone. How can I keep this or override it.
Override The Read Only Property Of User Control .OCX?
Jul 27, 2009I have used thirrd party tool from BigSpeed for file transfer. When ever I am trying to assign a value from (txtUserName) to the property like
FileTrans.GetUserName=txtUserName.text.trim
It gives error as Readonly property..... That means I can not assign a value to it.
Strategy To Override Enabled Property Of A User Control?
Aug 5, 2009I have a usercontrol with a picturebox and a few buttons related to it, such as LoadFromFile, Paste and Zoom (that last one pops up a new form). Is there a way to override the basic Enabled property of the usercontrol so that I can keep the Zoom button active all the time, while turning off the other buttons?
I realize there are 2 "obvious" replies. don't do Enabled=False, create a custom method. do everything in the one form, not a usercontrol, so you can pick and choose disabling. Both are less than ideal, given that I'm putting this control into a couple of existing forms, so I'd like to work around how those forms already behave. So is there a way to override the behavior of my usercontrol when it gets disabled? What would be my best strategy?
Set The Transparent Property Via Label Properties Properties Not Via Code?
Jan 16, 2009I'm working on a Hazardous Materials label printing program. One of the options is to do an "NFPA" label. Since there are 4 values required with 4 or 6 options, the ratings are entered via radio buttons in a group box. That's working okay. I display values in the NFPA diamond as they're entered: left quadrant blue, top quadrant red, left yellow, bottom red. I'm having trouble with the label in which the rating will be displayed on top of a jpg diamond for the white. In this quadrant the text can be up to 4 characters. I can accept the text going into an adjacent block a little, but the corners of the label overlap into another quadrant/color. I reduced the font size which solved the overlap problem but the font is then too small and looks terrible. I tried to make the background of the label transparent to let the color come through correctly but that's not a valid value for label.background. I'm figuring that the transparent background is the best solution. What can I use that will accept a transparent background so the color shows through?
I'm trying to set the transparent property via label properties properties, not via code. Here's the code if it makes any difference:
Public Class NFPA
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Close()
End Sub
[code]....
Possible To Override An Autogenerated Property In Designer File Using A Partial Class?
May 31, 2012I am using Linq to Sql that generated a data contract for a table. I have a date field in that table which is a non-nullable field. I need to override the auto generated property of the date field to return a specific value, something like [code]Is it possible to override an autogenerated property in the designer.vb file using a partial class? I dont want to create a new property as it is currently being accessed in n number of places and I dont want to change it in every place.
View 1 RepliesVS 2008 Can't Override ToString Of List(of T) For Purposes Of Property Grid?
Dec 13, 2011Just say i have:
vb
Public Class Something
Inherits List(Of String)
[code].....
VS 2008 Override The Method ToString() For The Property CheckBox.Checked?
Mar 13, 2011How would I override the method ToString() for the property CheckBox.Checked?
View 2 RepliesOverride The Datetimepicker Object To Remove The Texte When The Property _clearOnDisabled Is True?
Oct 12, 2011I would like to overrides the datetimepicker object to remove the texte when the property _clearOnDisabled is true. When _readOnly property is true, I would like to show the text in black not gray. So I tried with WndProc but I seem that every single object go through my function not only my datetimepicker. I get 100% CPU when I put the WM_PAINT message. I also tried to overrides the OnPaint but its not getting in.
Imports System.Drawing
Imports System.Windows.Forms
Imports DTP.WindowsMessages
[code]...
Sum The Properties Of Two Members Of A Collection Without Doing It Property By Property?
Aug 8, 2011I've reviewed the links that were offered and don't find an answer. Neither has a lot of searching helped, probably because I can't think of a reasonably short way to ask the question. I hope that I've at least found the proper forum and category.
In my VB 2010 code, I've defined a structure that has about 30 elements. I want to sum the properties (they are all singles) of two members of the corresponding collection. I understand that I can do something like:
member1.property1=member2.property1+member 3.property1 for the entire set of properties of member2 and member3 to produce a completely defined member1 What I wonder is whether or not there is a way that uses fewer lines of code - I know that I can't do:member1=member2+member3, for example.
Override A Textbox' Forecolor?
Jul 28, 2010I have been experimenting with my windows form application(vb 2008/10) and made sure that the top part(glass part) extended to become a bit larger.
Now 1 problem occurs. Everything, like text, which is black, will become transparent so unreadable. With labels and pictures, I solved the problem, I just write a string(e.graphics.drawstring) and for labels / titles I use a long method(not important).
Override The Textchanged Event In A User Control Based On A Textbox?
Apr 13, 2012I want to modify this code or replace it. I want to override the the textbox's textchanged event in a user control.
Protected Overrides Sub OnTextChanged(ByVal e As System.Windows.Forms.ItemChangedEventArgs)
MyBase.OnTextChanged(e)
End Sub
[code]......
Override The "always On Top" Property Of The Windows Taskbar?
Sep 24, 2005I'm writing a windows application in VB.net that I would like to give to other users. I've discovered that the Maximized appearance at runtime of my startup form is partially obscured at the bottom by the Windows taskbar if the user has set the property (via Control Panel) of the Windows taskbar to be "always on top" of other programs.I need the full client area of my start-up form to display various pieces of information, and an always-on-top Windows taskbar obscures some of that info. Is there a way, programatically, that I could turn off the always-on-top property of the Windows taskbar for the duration of my application, and then restore it to its original property setting as my application is closing?I know that I could just simply advise the user to go to the Control Panel, select display, etc. etc., and have him change the taskbar setting before and after using my application, but surely there is a programatic way to accomplish the same? I'm adding this postscript a day or so later. I've noticed that setting the TopMost property of my startup form (and setting the Size property to be large enough) will cover the Windows taskbar as desired. However, this is not useful to me. I want to be able, later in the program, to use the Show method of a DialogBox that keeps the DialogBox on top of the StartUp form even when I put the focus back on the startup Form (basically I want the user to be able to click on an item on the DialogBox, then click on an item on the startup Form, then click again back on the DialogBox, and so on, without the Dialog Box ever disappearing behind the startup Form). So the TopMost property of the startup Form doesn't help me, since it would hide the DialogBox as soon as the DialogBox loses focus. I would really prefer to issue a command, as mentioned above, that turns off the TopMost property of the Windows taskbar.
View 5 RepliesGet The SelectionStart Value For A Control In The Form_KeyPress Event?
Jun 9, 2010How can I get the SelectionStart value for a control in the Form_KeyPress event?
Form1.KeyPreview = True
Form1.KeyPress
Dim X as Integer = ActiveControl.Selection {gives error}
Dim X as Integer = TextBox1.SelectionStart {this works OK BUT will only work for one control because it is hardwired to TextBox1}
IDE :: Datagridview-Cells -SelectionStart,SelectionLength?
Apr 18, 2009With my form I have a datagridview, and from the datatable the data's are loading to datagridview.But the problem is when it's getting focus, it's selecting the whole contents of the cell of column(0) & Row(0).But I want to select like textbox
TextBox12.SelectionStart = 0
TextBox12.SelectionLength = 0
So the prompt will be in the starting position of cell...Is it possible for datagridview cells?My codings for datagridview
DataGridView1.DataSource = ds52.Tables(0).DefaultView
RichText Box SelectionStart Doesn't Work
Jun 11, 2011I am using the richtextbox selectionstart and selectionLength property for finding some text but its not working.[code]I am also use therichtextbox.Find () method but its not working.
View 2 RepliesBind A Dataview.count Property To A Textbox.text Property?
Aug 3, 2010I have a dataview an i would like to show the count property in a text box.
i tryied the following
me.textbox1.DataBindings.add(new DataBindind("Text",DataView,"Count"))
But i have a exception.
Properties - Object Property?
Feb 15, 2012I'm a C# coder, and I have trouble even reading VB.NET, so please forgive what may turn out to be an incredibly dumb question. But I have some code which looks like this:
CODE:
So, ignoring the fact that the syntax is probably wrong - how does VB.NET get the Name property from sourceObject? Inspecting it at run-time reveals that sourceObject is of a type that supports a property called Name with a getter, but what does VB.NET do in this case? Is there some extra code that is being generated by the compiler to somehow cast this automagically at run-time?
Use Reflection To Get A Properties Property?
Oct 6, 2010I am trying to get the value of local path by doing the following[code]...
View 1 RepliesTextbox - Use The Right Alignment Property Or The RighttoLeft Property Of A Text Box?
Nov 18, 2009I want to type the characters from right to left (to behave as a right alignment). But I am not supposed to use the Right Alignment property or the RighttoLeft property of a text box.For example, I want to enter the characters of a string from right and each character should shift one space left so that the user can enter another character after that.
View 13 RepliesProperties Statement Used For Declaring Name Of A Property
Jun 28, 2009i have read on the msdn and know properties statement used for declaring the name of a property, and the property procedures used to store and retrieve the value of the property.i learned about structure of it. but i cant figure out it clearly. [code]
View 3 Replies.net - Listing Properties / Checking If A Property Is ReadOnly
Nov 26, 2009I'm faced with a couple of problems in VB.net: I have a series of objects, which properties I'm displaying in a grid for the user to edit. My first problem is: how do I get a list of all the properties of an object? Is it even possible? The datagrid control that I'm using accepts string values with the name of the property as parameters, but inserting them manually would be a real problem, because there are a LOT of them. So: is there a way to get a list of strings with the name of each property of an object?
If that's possible, here comes the second question: Now, of course, since users are editing the properties, I'm not interested in showing ReadOnly properties which they cannot edit. Hence my secodn problem: is there a way to check if a property is readonly at runtime?
Properties - .net Property Get And Set Values Without Private Variables?
May 4, 2012I am programmer from some time only, I have certain doubts in fundamentals, could you please clarify on the following:Case 1:
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Does case 1 and case 2 yield same result, I mean is a private value necessarily in there?, can we use property itself to use its own value in its Set and get statements?
Properties - Invoke A Property Change In A Control?
Oct 6, 2010how to invoke methods, but how does one change a simple property?
For demonstration-sake, here's a very simple set of code that should help. Let's say I need to set the visible property from a child form, and thus, it needs to be invoked:
Friend Sub activateItem(ByVal myItem As PictureBox)
If myItem.InvokeRequired = True Then
????
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VS 2008 Property Grid Sub Items To Have Properties Too?
Dec 5, 2011i have a clsTest with the following layout:
vb
Public Class clsTest
Public Property Test1 as string
'...
[code]....
how can i make it so when i show clsTest's properties in a propertygrid it has the ability to expand clssettings properties? (kind of how font does it on a text box for example)
Wpf - Property Notification When Binding To Class Not Properties?
Jun 13, 2011I have a window that contains different functional areas of an account. The details, roles, type, contracts The window's DataContext is set to the 'AccountViewModel'. Inside the AccountViewModel, there are properties one of them being 'Account' which contains the details. I need for the user to be able to update these details. How can I notifiy the properties to call my Update() code when they are changed?
Here is what I have
<TextBox x:Name="txtAccountNumber" Grid.Row="0" Grid.Column="1" Text="{Binding Path=Account.AccountNumber, UpdateSourceTrigger=LostFocus}" />
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