How To Clear A String
Mar 11, 2009I have just moved over to Visual basic 2008 express edition. i want to clear a string and don't know how. the vb6 code was: txt = "" but know i does nothing? what do i do to clear the string.
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How To Clear All Contents Of String Array
Oct 28, 2009I have this:
Dim split As String() = temp_string.Split(",")
''#feed all info into global variables
patient_id = split(0)
doc_name = split(1)
lot__no = split(2)
patient_name = split(3)
How do I clear all the contents of split() ?
.Net: Empty String Is Not Clear Space Character?
Apr 7, 2009I've always use String.IsNullOrEmpty to check for a empty string. It recently come to my attention that a " " count as not a empty string. For example,
Dim test As String = " "
If String.IsNullOrEmpty(test) Then
MessageBox.Show("Empty String")
[Code]....
It will show "Not Empty String". So how do we check for " " or " " in a string?
edit: I wasn't aware that " " count as character.
Clear List Of String To Release Memory
Jun 11, 2012Is it necessary to clear a List of String to release memory?Or is it done automatically?
View 1 RepliesCreate A CLEAR BUTTON Loop To Clear All Textboxes?
Dec 13, 2011this is currently my code to clear my 5 textboxes
Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click
TextBox1.Clear()
TextBox2.Clear()
TextBox3.Clear()
TextBox4.Clear()
TextBox5.Clear()
End Sub
Clear Dataset But Get Error Sometimes If It Is Empty When Try To Clear It?
May 17, 2009I have a timer that runs every time by itself, and for the code the runs in it I would like to have it clear the dataset before it does anything, the timer runs every 10 seconds, so I tried to do dataset.clear but it would crash if the dataset had no values
View 4 RepliesClear Hyperterminal - When Press "ctrl+L" Is To Clear Terminal Screen How To Write The Code?
Jun 23, 2011in hyper teriminal when i press "ctrl+L" is to clear terminal screen how to write the code in vb.net? Hyperterminal is connecting to serial comport.when i try this it work and return line on debug
serialport.writeline ("at+cmgl=1")
i try this but not work and it still show some lines on debug
serialport.writeline (vbcrtl +"L")
serialport.WriteLine("vbCrLf + l")
.net - Clear() Or Txtbox.Text = "" Textbox Clear Methods
Sep 20, 2010way to clear textboxes in VB.Net and what is the difference between the two methods? I have also seen people be critical of folk using clear objects on their forms and i can see why but in this case, i am only learning.
txtbox1.Clear()
or
txtbox1.Text = ""
Clear All The Data In Data Grid View Without Clear The Binding Source?
Jul 15, 2009wan to ask about anyone know the code about how to clear all the data inside the data grid view without clear the binding source...
View 1 RepliesWhy Did Clear() Clear Both DataTables
Feb 28, 2011In my winform program (in vb.net) I wrote:
Dim dt As New DataTable
'Get data from DB into dt
'...
[Code].....
But when I run the program, Clear() cleared both dt and dttemp! Why? Aren't dt and dttemp supposed to be two distinct instances of DataTable?
(I finally found a solution - dttemp = dt.Copy() instead of dttemp = dt. But I still can't see why Copy() was necessary in this case.
StreamWriter Clear (clear The File "make The File Blank Again") And Move
Mar 26, 2010I am using the StreamWriter to create a log file for my application. However I do not see a method on how to clear the file (make the file blank again). Also before I clear the file I want to rename it so that I can have multiple log files, a new one produced everytime the application runs.
[Code]...
Clear All Controls Except One?
Apr 3, 2010I am using the following code to clear all the values of all my controls everytime I click save button....Is there a way to not to clear the value of a certain control inside one groupbox? I would like the radiobutton in one group box will not be cleared...or if it can't be done, how do i put back the selected radiobutton after i click save?[code]....
View 15 RepliesClear All My Fields?
Aug 5, 2009I have the aplication which requires name fields... and i wan tto clear these fields whenever i closed the application using close(X) button. i dont want to use 'clear' button.
View 3 RepliesClear All Row In Datagridview?
Aug 28, 2011i m trying to clear my all row in datagridview. Here is simply code
Me.DatabaseDataSet.Clear()
Me.StuffTableAdapter.Update(Me.DatabaseDataSet)
Me.DatabaseDataSet.AcceptChanges()
It's almost clear datagridview, but don't save this changes in base. I quite the app and start it again then old row are back.
Clear All Textboxes Except Three?
Nov 29, 2011I want to have a button that clears all textboxes except three. This code I got so far which clears all the textboxes except 1
[code]....
Clear Bin And Obj Folders?
Jan 10, 2011Is there any built-in function in vb that allows us to be able to delete our bin/obj folders instead of having me manually delete them myself?
View 4 RepliesClear Out A Pathstring Value
Feb 8, 2011I need to clear out a pathstring value. I have a command line created from four different text boxes. I have created a button that clears those text boxes, but it does not clear out any data already in the "pathstring". How do I clear it? This is for the coding that executes the pathstring command.
[Code]...
Clear Out A Tool Tip?
Jan 1, 2012Is there a way to clear out a tool tip?
I have a field where the tool tip data is changed based on what record they select. It's show each record in different tool tips. I just want to show the current one.
Below is my
Dim lblnotes As ToolTip : lblnotes = New ToolTip
lblnotes.SetToolTip(lblequipment, return_notes_stringtooltip())
Clear This Summary Box?
Mar 3, 2011I am a first year diploma in IT student and have this assignment here. Its for a catering business to calculate simply selections of food etc.So after calculation there is a summary to show total sales, number of sales and average sales. After the person clicks Ok i am asked to give them an option to clear summary.Now i need to know if they click yes how do i clear the summary?
Private Sub summaryButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles summaryButton.Click
'Calculate Average and Display Total Sales
Dim returnDialogResult As DialogResult
[code]....
How To Clear A Bitmap
May 31, 2010I've created a bitmap on which I use setpixel to color it in. Then I display it on a picturebox. I want to clear the bitmap form time to time, reset all its pixels. I see no bitmap.clear() method and there's nothing in the documentation that seems. Short of disposing of or setting the bitmap = nothing and creating a new one, how do I wipe a bitmap?
View 8 RepliesHow To Clear A DataGridView
Apr 9, 2007How do I clear a DataGridView? Basically I want the user to be able to click the button again that fills it and it will erase everything and refresh the data.
View 17 RepliesHow To Clear A DataTable
Feb 28, 2009I have a form with a tabcontrol. The tabcontrol has two pages. The first has a form that the user fills and clicks on a button to store the values on a SQL database. The second has a combobox that is filled on the click event of the button with the values of a field of a database table. I put the filling of the combobox on the button's click event in order to display the new (stored) value. The problem is that if the user repeats the above procedure then the displayed values (in the combobox) are doubled, tripled etc. I tried to clear the datatable that I am creating and filling after assigning its values in the combobox but it doesn't work. [Code]
This code is on the button's click event. But it returns an empty combobox. I can't understand why is doing this as first I am filling the combobox with the values from the datatable and then I clear it. Any suggestions for solving the above problem?
How To Clear Datagridview
May 5, 2009I am using datagridview.rows.clear() to empty a grid that i can't clear it. is there another way to empty the grid?
View 1 RepliesHow To Clear Listbox
Mar 6, 2010I'm writing a code in which the user is supposed to enter a number less than or equal to 15 and greater than 0.And If user enters a number greater than 15 then he gets an error msg. I do have the right code for error messge but the listbox still shows the result along with the error message box. How do I JUST have the error message.[code]
View 1 RepliesIDE :: How To Clear DataRow
Oct 5, 2010Code is in VB 2008,
In code i am using Datatable, using that select method datarow
Dim dt as New Datatable
Dim dr() as Datarow = nothing
[code].....
Sub To Clear All Textboxes Value ?
May 22, 2012Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) _
Handles Button1.Click
EmptyTextBoxValues(Me)
End Sub
[CODE]...
This sub is for to clear all textboxes value, i just need to know how did it work ?
VS 2008 - How To Clear WMP URL
Jan 23, 2012With every sheet music file opened, I am also loading background music file, if such exists. If music file doesn't exists, I need to clear the previous one from the sourceURL, otherwise I have wrong music playing with wrong notes. How can I do that?
HTML
Sub Play_BackgroundSoundFile()
Player.settings.autoStart = False
Dim urlpath As String = (Application.StartupPath & "UserMIDILibrary")
Dim fname As String = Path.GetFileNameWithoutExtension(pathload)
fname = fname & ".mid"
[Code] .....
Way To Clear A Datatable
Feb 12, 2009I am filling a datatable and after storing the values I want in two variables I want to clear my datatable or erase it.[code]...
As the above code is in a function (and I am calling this function many times) it causes me problems. The variables id and entitycode store the first values (the first time I run the function) and then it always use them. That's why I want after storing the values in variables to also clear the datatable or even erase it (and rebuild it when I rerun the function).
Way To Clear Clipboard
Jul 13, 2010I would like to clear clipboard
View 2 RepliesBest Way To Clear All Pixels In A Bitmap?
Aug 28, 2009Was just wondering if there is a way to quickly clear all pixels in a bitmap without creating a new one?
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