Implement A TextChanging Property On A TextBox?
Feb 6, 2012
TextBox has an event for TextChanged that occurs after the Text property has been changed. I need my control to raise an event before the Text property is actually changed to validate data. If it is valid the Text can be changed, if it is not valid the Text does not get changed.
Here's what I tried:
Public Class TextChangingEventArgs
Inherits System.ComponentModel.CancelEventArgs
Private p_sNewValue As String
[Code].....
This works for programmatically setting the Text value of the BetterTextBox control, but it does not work when you are typing into the text box.
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Dec 9, 2011
I'm having some very weird issues with interfaces right now.
I have a very simple setup. In one of my class, I have a Property implementing a Property from an Interface.
In my class it's like:
Private _oForm As IForm
Public Property Form As IForm Implements IContainer.Form
Set(value As IForm)
[Code]...
I have like dozens of interfaces like this working throughout my project and I can't believe this simple one can't work!
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Feb 24, 2009
How does one implement something as Public ReadOnly Property within a class.
CODE:
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May 18, 2009
can i use Datasource Wizard dynamically in my application..Is is possible..open vb.net windows application..then take one combobox..Then goto combobox properties ..Then select Datasource and click on ADD project Datasource..It's open One wizard (Datasource configuration wizard).Now come to my application.i am developing one designing tool..in my tool also having combobox..i am setting all the properties to combobox ..all are working fine..but This datasource property is not working fine..i can use this DataSource Wizard Dynamically to my combobox Datasource property...This is the code i use for setting the property..
Private MyDataSource As Object
<Browsable(True)> _
<Category("Data"), AttributeProvider("System.ComponentModel.IListSource")> [code].......
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Aug 3, 2010
I 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.
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Nov 18, 2009
I 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.
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Feb 23, 2012
I am facing "CREATE TABLE" syntax error when I am using a create table query. Here I am trying to implement the table name from textbox.
Public Sub emp_ledger()
o1.cn = New OleDbConnection("user id=admin;password=;data source=D:\OSSPL DATANET\OSSPL FORM\emp.mdb;provider=Microsoft.Jet.oledb.4.0")
o1.cn.Open()
Dim tblName As String = Trim(Me.TextBox1.Text)
[code]....
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May 28, 2011
I want to implement a fancy scroll bar for a multiline textbox like the picture below[url]....
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Aug 4, 2010
I am using Visual Basic 2010 Express to develop my windows application.
I am developing an application wherein I need a functionality similar to the outlook email address.
In outlook, we are able to enter multiple email addresses in "To" address box. When typing first few chars of an email, the AutoComplete functionality displays the list of possible email addresses. Either we can select from the list or we can continue typing. As and when we type email addresses, the AutoComplete functionality shows the list of possible email addresses for every email address that we type in the textbox (if anything is there). I am trying to implement this functionality in my application
I found there is a AutoComplete functionality for textbox. below is the code
[Code]....
I know that the AutoComplete is only for one word and not for multiple.
But How to implement the AutoComplete functionality for multiple word in a textbox?
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Jun 24, 2011
In my form, I have textbox + combobox to enter datas which are saved to ms access. I have search option too. Also i have DataGrid to show the result of the search. What I want now is, 1. To show the search result in the textbox/combox as well (I already am able to make the result show on datagrid)2. When there are multiple result showing on DataGrid, if i click on a particular result on DataGrid, let the textbox/combobox automatically loads the details of the one i clicked.
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Jun 21, 2012
I have created a wpf vb.net project and am trying to set a simple databing. I'm not quiet sure how to set my DataContext = this; in the codebind. Currently when i run the program my Label never is updated. I have included my code below. [code]....
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Jan 5, 2010
maintain same distance between textbox & Label while resizing form, Is there any property to label or textbox.when we want same distance from form then we use anchor property but i want to maintain same distance from next control that is textbox. How i can maintain same distance while resizing form?
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Jun 13, 2010
I have Visual basic 2008 express and I have the next code:
[Code]...
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Jul 27, 2009
I want to be able to enter email addresses into a textbox and then add a semi colon ; between each email and then pass it to a an smtp function as one string. This is the code that I'm using, but it doesn't work. I'm not sure where the error is, but when I debug it the string remains the same without splitting it with a[code]...
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Nov 17, 2010
I am trying to assign a dataset to the TAG property of a textbox control in my application. The code seems to do the assignment without any error but I cant see the property TAG name or the assigned value using quickwatch etc. etc. The TAG property name does show in the design window.
Is this property useable in my version (academic 2002 version 7.0) or does the TAG and any assigned value it holds not show in quickwatch. I can only find 1 reference which seems to suggest the TAG property is not supported in early versions, but would prefer a definitive answer.
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Aug 4, 2009
I want to give the user the ability to modify the font characteristics of a textbox on a form, using buttons. In the button click_event, I can successfully have the user change the font color to red directly:
[Code]...
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Nov 27, 2010
I seem to be having a problem binding the visibility property of a textbox to a database value using the advanced binding property.I found this article (BUG: Inconsistent behavior when you bind the Visible property of a Windows Form control to a Boolean field) stating there is a bug in some ol
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Apr 27, 2009
Basically I'm writing a little piece of photo-editing software and I would like the user to be able to write whatever they want as a caption for the photo. VB then writes that text in a blank space created under the picture. Pretty straightforward, I've got it printing the text and it can adjust for height differences (i.e. multiple lines of text, smaller fonts, etc.).
My issues arise in the horizontal direction, I cannot make the Richtextbox large enough to represent the width of the photos (Some pictures have dimensions several thousand pixels wide and most monitors cannot display that many...) so I have used horizontal scroll bars (wordwrap off) to allow the user to scroll across and see all the text. Now what I would like to do is to set a limit to how much text the user can enter on a line (based on pixels to accommodate for various fonts/sizes) and it seems to me that setting the .RightMargin to just a little less than the picture dimension (to allow for padding) should do just that. [Code]
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Aug 19, 2009
I'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]...
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Mar 11, 2010
I want to set Textbox1 to textbox 55 to .readonly =true by using says For loop,so i need not key in one by one. Any ways to do it?
I know sonthing like
For index As Integer = 1 To 55
Me.b.Controls("Textbox" & index).Text = index
Me.b.Controls("Textbox" & index).TabIndex = index
[Code].....
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Oct 14, 2009
i need textbox to have the property auto-size when i write anything more than its size textbox.width became bigger in order to display the letters or the digits is it possible ?
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Apr 19, 2010
I have a windows form which contains a textbox.I have a loop in my code doing some farly intensive work. In the middle of the loop I want to update my text box.text property on the form to let my users see some simple progress.
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Dec 15, 2011
I have created a web application and have a number of textboxes on a web page. I have created a new class with carries out a number of calculations and if there is no text in the box it enters 0.00 so I dont get a null exception.
[Code]...
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Mar 11, 2011
i am struggling with something quite elementary and simple. I am creating 200 dynamic textboxes with the following code :
[Code]...
Now, I need to restrict the user to type a maximum of 5 characters inside. The MaxLength property is supposed to help me with that, but the user is still allowed to type more than five characters!Later on, after I have crossed this bridge, I'll need to allow a minimum of five as well - so that the user will always be able to enter only five characters inside each textbox. Another problem in the future will be to allow only numeric digits. These are product codes, whic are always numeric, and always 5 characters in length
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Jul 29, 2009
I want to write a simple propety for textbox.
I know a structure of property statement but i cant do exactly.
example :
I want create a property name selectedlength1. And i have two textboxs in my form and i want to assign :
Textbox1.Selectedlength1 = 2
Textbox1.Selectedlength1 = 3
Then the length of string in textbox1 is selected is : 2 and 3 for textbox2.
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Oct 6, 2011
I'm trying to write a Database manager in VB (2010) that updates a SQL database that compiles and summarizes my financial records. The code works, but I'm having issues with one exception that I think I understand, but can't circumvent. I've built an I/O form that enters a series of purchases and sales into a temporary datatable. After review of the list, the program connects to the database and executes the SQL. That all works and isn't a problem.
[Code]...
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Nov 1, 2010
I'm having some trouble with a class that uses the ToolStripControlHost, I have to create a label and a label beside the textbox, this works, the problem now and I can not access the property. Text of textbox (txt). the class to this:
Public Class ToolStripTextBoxWithLabel
Inherits ToolStripControlHost
Public Event TextoAlterado(ByVal sender As System.Object, ByVal e As System.EventArgs)[code]......
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Dec 5, 2009
I seem to be having a problem binding the visibility property of a textbox to a database value using the advanced binding property.
I found this article (BUG: Inconsistent behavior when you bind the Visible property of a Windows Form control to a Boolean field) stating there is a bug in some older versions of the .net framework.
Does anyone know if this has been fixed in 4.0?
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Jul 22, 2011
Is there any predefined property by which I can set the DisplayFormat/DisplayStyle of a textbox? Suppose I want a textbox to hold the actual value 888888888888.88 and show it formatted as 888,888,888,888.88. In short it should hold 'Double' data type value and show it with thousand separators and decimal places upto two digits. If text is cleared from the textbox, it should have 0 as value and 0.00 as displayed value.
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May 24, 2011
When i am assigning text in to textbox that time the selection start property is zero so the cursor(caret) is moving to first location of the textbox.
Code Sample
Consider that the textbox already have text like 'Hello Developers'
Dim CurPosition As Integer = TextBox1.SelectionStart
'CurPosition=11 (i.e) SelectionStart is 11 (cursor position)'
[Code]....
so when i am executing this code the cursor move up and down
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