Add To TextBox, Prevent Scrolling?

Mar 25, 2009

I have a textbox to which text is continuously appended (every second new status data at the end).I would like to act it as follows:- When the cursor is positioned at the end: Stay at the end, scroll the textbox (text disappearing at the top).- When the cursor is positioned somewhere else (not at the end): Stay exactly there, don't move the cursor, don't scroll, don't change the top line of the textbox.This seems to be surprisingly difficult (tried quite several ways).This is how far i came:

Private Sub addToTextBox(ByVal daStrg As String)
Dim posAtEnd As Boolean, selPos As Long, selLng As Long
If myTextBoxForm.txBox.SelectionStart = myTextBoxForm.txBox.TextLength Then

[code].....

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I am working with adding up user's scores based on their checks in a CheckBoxList. Every time a user checks a box, a value, X, is added to the overall score. When a user unchecks a box, a value, X, is subtracted from the overall score. No problems here.

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I'm trying to print my visual into a multipage xps. The first page is working but the others are left blank.

Dim xP As Integer = 0
Dim yP As Integer = 0
xP = Math.Ceiling(WorkFlowCanvas.Width / pageWidth)
yP = Math.Ceiling(WorkFlowCanvas.Height / pageHeight)
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[Code]...

By making the visual in xaml and printing it I noticed the scrollviewer always scrolls the content up before writing it(the scrollbars don't move). Is there a way to 'freeze' the scrollviewer?

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Now the fun part I am stuck at.I think I have to handle the mousedown, mouseup & mousemove on the panel to set the autoscrollposition so that when someone touches the panel and drags, it does it's scroll magic. Please help fill in the few lines of code in below method stubs. The msdn doc on autoscrollposition is very confusing since it returns negative numbers but needs to be set to positive with abs and what not.

Point mouseDownPoint;
Point mouseUpPoint;
Point mouseDragPoint;[code]......

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Credits-style Scrolling Textbox And Form Detecting A Enter Keypress?

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How can I stop the scrolling of the text inside the cell/textbox.

Also : if the user Paste into the cell/textbox how to truncate text if larger than display area.

sample settings:
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DataGridView1.AllowUserToResizeRows = False

[Code].....

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Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
OpenFileDialog1.ShowDialog()
AxWindowsMediaPlayer1.URL = OpenFileDialog1.FileName

[code]....

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Forms :: Prevent Colon In Textbox?

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The below code allows me to prevent a textbox to only allow numerics, backspace. I would also like to have the textbox to accept ":", but struggling to find the correct way to do this. Could anyone advise? Below code is in the Keypress event.

If Not Char.IsDigit(e.KeyChar) Then
If Not e.KeyChar = vbBack Then
?????????????
End If
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How to prevent textbox to be not accepting numbers in first

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Only characters in first 5 digits and other digits accept

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[Code]...

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Oct 28, 2009

I have a custom text box component (inherits from system.windows.forms.textbox) that I created in vb.net (2005) that handles the input of numeric data. It works well.

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I was thinking that the text box could cache the value and compare it to what is listed in the text property. If they are different, then I would want the validating/validate events to fire. If they are the same, nothing is fired.

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Update:

Here is the custom text box class. The idea is that I want to cache the value of the text box on the validate event. Once the value is cached, the next time the user tabs through the box, the validating event will check to see if the _Cache is different from the .Text. If so that is when I would like to raise the validating event to the parent form (as well as the validated event). If the _cache is the same, then I don't want to raise the event to the form. Essentially the text box will work the same as a regular text box except that the validating and validated method are only raised to the form when the text has changed.

Public Class CustomTextBox
#Region "Class Level Variables"
Private _FirstClickCompleted As Boolean = False 'used to indicate that all of the text should be highlighted when the user box is clicked - only when the control has had focus shifted to it

[Code]....

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VB Version: 2010
OS: Win7

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Private Sub grdMouseWheel(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs)

[code].....

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[Code]...

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Is there a comprehensive guide to programming graphics outside the normal get-a-picture-from-here-and-put-it-there model?

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Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox2.Text = TextBox2.Text & TextBox1.Text
End Sub
End Class

Above is a really quick and dirty bit, take input from one textbox and output to the other using a button click or some such. After so many button clicks get the text box to scroll without doing it manually with a scroll bar, so you always see the latest entry.

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