Detect Keystroke In Datagridview?

Jan 7, 2009

I'm having problem with keystroke detection, I want to detect only "enter" and "I" keystroke.If you press "enter", it will automatically close the form the datagridview located and send data to other form, I'm using keydown function, but I don't know how to detect only "enter" and "I" keystroke, usually I'm browsing datagrid with tab button, but when I press tab, it also closed down.

[Code]...

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DataGridView: Validation On Keystroke In Column (D.G.V.TextBoxColumn)?

Jan 18, 2009

I was curious if there is an easy way, besides making a new custom DataGridViewColumn, that on each keystroke validation is done (while the D.G.V.TextBoxCell is being edited), instead of when focus is lost off the cell.Or in a different senerio, if there is a way to restrict user keystrokes while a D.G.V.TextBox Cell is being edited, while not relying on making a new custom DataGridViewColumn. I would go through the work of implementing this new Column, except the customer for the job I am working at wants small, managable code. And even if this is a useful feature, they would want to avoid having an extra class being made.

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How To Send Keystroke

Nov 20, 2008

the code that send keystroke to another app by vb.net

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Datagridview Detect When Checkbox Is Clicked?

May 30, 2009

i need to know exactly when a checkbox is checked either by clicking or by spacebar.

I have looked at cellbeginedit, cellclick, cellcontentclick,cellendedit,cellformatting,cellleave,cellpainting,cellvalidating,cellvalidated,cellvaluechanged, and cellvalueneeded.

None of these inform me of when the checkbox value is changed. cellclick is almost the one, but it fires before the value is changed. cellvaluechanged doesnt fire until you leave the cell. the cell value changes and the cell is painted even if you dont leave the cell.

I have spent all day trying to get it right. I want to detect exactly when the checkbox value is changed so i can do some calculations and depending on the calculations, i may cancel the check mark.

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Capture Down-arrow Keystroke?

Jul 8, 2009

The feature I'm trying to implement allows the user to press the down-arrow key and "tab" through different features on the form. Is there a way to use the keyPressEventArgs or something similar to catch that? Is it necessary to delve into hooks and processes? And if so, does anyone know a good resource for a beginner?

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How To Stop Keystroke Event

Dec 23, 2009

I need to stop the keystroke event when I pressed a particular key. E.g.: If press alt+tab key then that keys should not perform that operation, that should operation should be stopped. I captured that particular keystroke, but I want to know how to stop that particular operation.

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Send A Keystroke To A Window?

Oct 21, 2010

I'm trying to send a keystroke to a window (of an external executable) but am having problems.

If I launch the exe with a window I can successfully send it a "q" (in order to make it exit) using the follow:

1) AppActivate and SendKeys

2) SendMessage API using WM_KEYDOWN and WM_KEYUP

3) AppActivate and keybd_event or SetForegroundWindow and keybd_event

However, if I launch it without a window, obviously method 1) does not work as SendKeys only work on applications with visible windows, but I thought that method 2) would work. However, it doesn't. Also, using method 3) with SetForegroundWindow as this seems to only work with visible windows, which is not really a surprise I guess, given the name.

Another method I have tried, which won't work is using the RedirectStandardInput - I have this working correctly, but the application is looking for keyboard events, not writes to its StandardInput stream, so this doesn't have any effect.

Finally, I have tried using SendMessage and FindWindowEx, and TranslateMessage, to find any child windows or controls that should be receiving the messages, rather than the main window. However, no child windows or controls are found, and I wouldn't have thought this would be the solution given that, if the window is present, the main window receives the message as it should.

So, I have confirmed that the messages are going to the correct window, as they arrive as they should when the application is launched with a window, but I cannot get the application to receive the message when it is window-less. The solution doesn't have to involve messages, or even be particularly robust, but this is what I have tried so far (all the obvious stuff!)

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Send Keystroke With Sendinput?

Mar 29, 2010

is there something wrong with this? its not sending the key

Dim inputEvents As New USER32.INPUT
inputEvents.ki.wVk = Convert.ToInt16(key)
inputEvents.ki.wScan = 0
inputEvents.ki.time = 0
inputEvents.ki.dwExtraInfo = IntPtr.Zero

[Code]...

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Disable KeyStroke During Form Loading?

Dec 3, 2009

Problem: Form hasn't fully initialize but shortcut keys can be usedDetails: Launch an mdi child with database access retrieving data, and user is already using the shortcut keys while the data is still been retrieve which results to error since object hasn't fully initialize yet.

Goal: Hinder user from using shortcut keys by disabling the keys at initialization then enabling it after all objects are good to go.

Another Situation is:A form with a gridview and a button.I got a hotkey that when press, handles a gridview getfocus event.

The problem is that the gridview is still making its instance and when press the hotkey, it activates the getfocus property of that gridview(which is still creating its instance).

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End The Program On Any Keystroke Or Mouse Movement?

Feb 18, 2009

I've got a very simple screen saver program that displays alot of stuff in pictureboxes and labels...dynamic display. I want to end the program on any keystroke or mouse movement. I've placed the statement "me.close()" in Public Sub Form1_KeyDown routine (Form1/Events). Nothing happens when I type though. I've seached the forums.....keypreview is true....

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Send A Keystroke To An Application With No Window?

Oct 4, 2010

I'm trying to send a single keystroke to an application that has no window (because I have launched it with StartInfo.CreateNoWindow = True) and therefore I can't use SendKeys. I had a look at SendMessage but this doesn't seem to be quite right as the programme I'm sending it to doesn't process message queues.I would usually use the StartInfo.RedirectStandardInput property and send it via a StreamWriter but this doesn't not work as the application it is being sent to is looking for actual keyboard keystrokes, rather than pulling info from StandardInput (an old C++ programme using getch). Anyone have any ideas how to send a keystoke to an application with no window (FYI I don't need anything back from it, I don't need to wait until it's processed, and I only need to send one letter and no carriage returns or linefeeds, though these wouldn't hurt)

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VS 2008 Send Keystroke With SendInput?

Mar 28, 2010

i am trying to send keystroke using sendinput but it doesnt seem to be sending. I have sendInput declared in user32 class with the input type

dim key as Keys = Keys.A
Dim inputEvents As New USER32.INPUT
inputEvents.ki.wVk = Convert.ToInt16(key)

[code]....

am i setting the flags wrong to send a key? not 0 then a 2?

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Detect Up,down Arrow Keys While In Edit Mode Of Datagridview?

Oct 26, 2011

I want to detect up,down arrow keys while in edit mode of datagrid view i use the code below but it is not working?

Public Overridable Function EditingControlWantsInputKey(ByVal keyData As System.Windows.Forms.Keys, ByVal dataGridViewWantsInputKey As Boolean) As Boolean
Select Case keyData And Keys.KeyCode

[code]....

Both case arrow keys are not detected. please tell how to detect

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Detect Which Column Is Showing An Editing Control In A Datagridview?

Dec 16, 2009

i have a DataGridView responsible for showing a bit of data and two of my columns allow for user input using comboboxes.The trouble is that one column only needs to show preset values in it's list, but the other needs to both show the presets and allow for the user to enter in their own values.i accomplish this by showing the editing control for the combobox with this bit of code:

Private Sub DGV_EditingControlShowing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DGV.EditingControlShowing

[code].....

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VS 2008 : Detect Vertical Scrollbars In DataGridView And Combobox?

May 11, 2010

I have ComboBoxes and DatagridViews for which I've written code to automatically adjust the width of the ComboBox dropdown list or DataGridView columns depending upon the available space for them and certain conditions.The problem is when a vertical scrollbar appears. I then need to adjust for the width it takes, but am not able to find how to detect this using code.Ive been looking at .ScrollBars, but with this I can only set/get for them to be able to be there or not.

For the ComboBox:

-How can I detect if it has a vertical scrollbar before opening its dropdownlist, if at all possible?

-If not, how do I check using code if it has a vertical scrollbar?

For the DataGridView:

-How do I detect using code if it has a vertical scrollbar

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Keystroke Binding - Adding Number Pad Into Calculator?

Dec 9, 2009

I am fairly new to programming and I am completing the Step by Step by Microsoft for Visual Basic 2008, but I am not finding anything in the book about binding keystrokes for a program. I want to add the Number Pad into my Calculator Program so that every keystroke on it would correspond to a button in my program but I am unsure how to do this take.

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Sendkeys - Simple Application For Sending Keystroke?

Mar 20, 2012

I have an issue regarding Sendkeys Class, as i want to use this class in order to send some keystroke to the active application. As a first step i want to test the {Enter} keystroke, so in order to achieve that i made a simple application in vb.net 2010

Public Class Form1
Public Shared data As String
Private Sub SendintText(command As String)

[Code].....

By the way in order to use double quotes in a parameter you need "test"...(i have spent 15 min to find out) so it might be usefull...

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Store Keystroke From Computer Or Any App And Transfer It To Given Text?

Nov 15, 2009

I want to create application that will keylog keystroke and if specific word or key stroke is typed than it will change typed word to somestring.

Example :- (kinda like flowchart)

1. User types "something" in word, firefox, etc.. ( doesn't matter it should be able to capture value from any app )

2. Application captures keystroke and check if keystroke is "something"

3. If keystoke is "something" then it will transfer or take away "something"

4. Instead of something it will type or write "I just wrote something."

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VS 2005 Watching Keystroke As Type In Textbox?

Mar 23, 2009

give me the line or code on how to check the characters as you type into a textbox. What i want to do is, creating a calculator.. but on the numpad, if you strike the "*"(asterix) or plus... or what have you... then it should change the Sign to it.. and not type the actual "*" in the text box..

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Keystroke Combination And Having It Invoke A Textbox Or Datetimepicker Field?

May 18, 2009

let me explain in more detail so you don't get the wrong idea of what I'm trying to accomplish.If I have a button object, say Button1, on my form and I select it with my mouse, it brings up another form or dialog. If in the text field property of Button1 I enter &Button1, the B will have an underscore under it and if I hold down the Alt key and press b, it too will invoke the other form or dialog. I would like to also have the capability to do that with a datepicker field or textbox field.

Right now, I can set up several buttons with Alt-keystroke combos that work by default, but it seems like I have to write some form of keystroke intercept routine and test for the conditions I'm looking for and force the focus to the datepicker or textbox. Am I missing something? Is there a better way to do this? Or is there actually a way of setting up a label on a textbox or datepicker object.

Kind of like when you're using MS Access and building a report, the fields have a leader that you can type a label in. That's what I'm looking to do. So if the label part of the datepicker field says Date: if I press and hold the Alt key and press d, it will invoke the datepicker field (aka open the calendar for selection).

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Detect Alphabetic Or Numeric Key In A Datagridview Control And Send Handled Key To A Textbox?

Feb 6, 2012

I'm working on a Form that contains a datagridview and textbox, I need the datagridview detect any letter of the alphabet or numbers, then select the input and send the key pressed to input.

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VS 2005 Keystroke Watch - Create A Program That Runs In The Task Bar Next To The Time

Apr 10, 2009

what I would like to do is create a program that runs in the task bar next to the time. What I want this to do is listen for the key stroke combo of CTRL-ALT-T no matter what program they are in. When they hit this key stroke I want the program to do is hide the task bar on the bottom of the screen. you know how you can change the hight to two rows one row and so on but you can also drag it down so it has no rows and can't see it. Then when they hit CTRL-ALT-T it will then display the task bar with what ever the hight wa set to. Just don't know what direction to go to do this.

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Detect Changes In CSS?

Jun 21, 2010

I want to write an application that can detect whether a value in CSS file has changed or not

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Detect X64 Or X86?

Apr 29, 2010

Why there's no built-in function to detect platform, I need to know I am running on x64 or x86?[code]...

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Best Way To Detect Row From Table

Jun 3, 2011

My table gets its information from a Mysql database online. I'm not sure which would be quicker to retrieve the row that contains the information specified.[code]...

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C# - Detect When The Value Of A DataGridViewComboBoxColumn Changes?

Dec 7, 2011

I have a dataGridView control with a DataGridViewComboBoxColumn column, the question is Which event of the dataGridView I must use to detect when the user change the selected value of a particular DataGridViewComboBoxColumn?

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Detect CapsLock On / Off

Jan 30, 2010

How to detect whether Caps Lock/Num Lock is on/off on a keyboard?

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Detect Changes In Files?

Apr 26, 2010

I have a text file, about 30mb's in size which gets modified regularly (lines are appended - logfile), but what I would like to do is only read the contents that have been added since the file was last modified.

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Detect End Of DataSteam WMP?

Feb 24, 2010

How can I detect when the WMP has reached the end of the current song? I'm making a media player, and have my songs in a list box. Here is my code for playing a song.

CurrentSong = SongPaths.SelectedItem
WMP.URL = CurrentSong
Label2.Text = "Now Playing: " & Songs.SelectedItem

Songs and SongPaths are both listboxes (SongPaths is hidden) As you might have guess, Songs has the song names in it, and SongPaths has their directory path, the two listboxes are in-sync (Choosing "SongA" in Songs, will select the directory of it in SongPaths)What I need to do, is detect when a song is over, so I can call this code:

i = i + 1
Songs.SelectedIndex = i
'Will select the corresponding item in SongPaths as well.

[code]....

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Detect How Much Memory Each Tab Is Using?

Aug 31, 2009

How can i detect how much memory each tab is using

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