Clear Combo Box Contents In .net?
Mar 16, 2010If for textbox it is textbox1.clear, etc.What is the equivalent for combobox to clear the value.
View 1 Replies
ADVERTISEMENT
Clear Contents From Datagridview?
Dec 31, 2008I have a form with a datagridview on it. I have a save button that saves the data from the datagridview to the database.After the button (save) is clicked I want the datagridview to be cleared of the data that is present in the dataGirdView.
View 9 RepliesClear Contents Of A Datagridview?
Jul 22, 2009How can i clear the contents of a datagridview.[code]...
View 2 RepliesClear Contents Of A Panel?
Feb 21, 2010I am doing a school project and have created a small program that allows the user to create a binary search tree and then visually displays it on the screen as a familiar tree structure, how the addition, deletion of nodes in the tree works along with many other things such as different tree traversals. I currently using a large panel on the main form and then adding user controls containing a textbox that displays imputed values,then using the panels paint event I draw a line between the user controls, this works fine however for deletion of a node I need to clear the main panel of the nodes that will change and add them to the panel again or just clear the hole panel and redraw the whole tree
View 1 RepliesClear The Contents Of A Csv File From VB?
Feb 16, 2011I need to delete/clear all data from an existing csv file from Visual Basic. This seems really simple but I have had a lot of problems making it happen!
View 1 RepliesClear A Listbox Of Its Entire Contents?
Jul 22, 2010I'd just like to know how to clear a listbox of its entire contents. I know in VB6 it was something along the line of 'lstBox.Clear', but that doesn't seem to be the case in this new version of VB.
View 3 RepliesClear The Contents Of A Listbox And All Other Feilds
Mar 10, 2009how I can clear the contents of a listbox and all other feilds.this is what I have upto now, and this clears texbox, checkboxes ect... but it wont clear contents that appears in a listbox:
[code]...
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() ?
CheckBox Unchecked - Clear Contents In RichTextBox
Jul 2, 2009I am using the following code for a checkbox, if checked it should print the text defined, unchceked, it clears the items in the ricktextbox. My problem is it prints fine (lets say it prints two lines) as defined, when I uncheck, it clears the text in rich text box, but when I check again, the text appears in the richtext box, but displayed from 4th line. I need to restart from the beginning/ or at least from the next available line. I cant use clear() since it erase all the contents as i have another 3 checkbox items placed.
If CheckBox1.Checked Then
richtextbox.SelectionColor() = Color.Blue
richtextbox.AppendText("Urgent:")
richtextbox.AppendText(CheckBox1.Text.ToString + vbNewLine)
Else
richtextbox.Refresh()
End If
Clear Combo Box Before Load?
May 5, 2010I am having a function which populates a combobox (cmbProjtype) as shown below,
I am trying to clear cmbProjtype before I populate again to remove duplicates whenever the function is called, but the line of code added (highlighted) is not doing it.[code]....
Clear Combo Boxes With Button?
Mar 20, 2010I need to know how to clear what is currently in the combo box with a 'Clear' button. Basically, I have a combo box with a list of destinations for the user to choose from. Say the user selects Australia, when I click a clear button, I need this selection to disappear, and be ready for the next user to select a destination.
View 2 RepliesCombo Box Clear On Button Click?
Sep 4, 2010I have a combo box that I have set with different names. This is not connected to a database. I simply want to clear the combo box for the user to input the next customers information. I am using a button to do this and my button name is btnclear.
View 2 RepliesClear The Contents Of The Datagridview So That When Each Option Is Selected Only That Data Is In The Grid?
Jun 22, 2009Public
Class LoanCalc
Private Sub butCalc_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butCalc.Click
'This procedure executes when the user clicks the Calculate
'button to produce a loan payment based on the requirements
'as stated in the service request.
'Variable Declarations
Dim douPrincipal As Double = Me.txtPrincipal.Text
Dim douInterest() As Double = {5.35, 5.5, 5.75}[CODE]......
Sql - Clear A Combo Box When Pulling Information From A Database?
Mar 29, 2012We are writing a program that pulls a Teacher from a database, then you select the "period" 1 - 7. What is happening is if we pick period 1 on teacher john doe. Then when you pick another teacher it doesn't clear the period that we selected before. How do we clear this information every time we select a different teacher?
View 2 RepliesUnable To Clear The Contents Of A Text Box (Visual Studio 2010, .net Windows Application)?
Mar 18, 2011What I have is on my form there are several text boxes. These text boxes are for user input and attached to each text box is a Private Sub txtBox1_KeyPress function. In that function I have some validation code to check that the user is inputing only what I want them to. And if it doesnt it will pop up a message box telling them so, then it is supposed to clear the text box so the user can try again. But no matter what I try, the text box does not clear it still keeps the last character typed (the invalid one).
Here is the code for one of the text boxes.
Private Sub txtLanIp_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtLanIp.KeyPress
Dim strEmpty As String = ""
If Char.IsDigit(e.KeyChar) = True Or Char.IsPunctuation(e.KeyChar) = True Or Char.IsControl(e.KeyChar) = True Then
'do nothing
[code]....
The commented methods at the bottom are some of the other things ive tried to make this work. The txtLanIp.text.clear() is what ive tried from the beginning. I have also tried setting the text to "", I even created an empty string and set the .Text value to it but no matter what it wont remove that character. I have also tried various trim(), len(), Select() functions, most either give me an 'index out of range error', a 'length cannot be less than zero' error or a general ExceptionOutOfBounds error. I am just tearing my hair out as to why the simple way doesnt work, there is no logical reason why and it gives no error it just doesn't clear the box.
I have also tried moving the validation to a _LostFocus but e.KeyChar isnt a valid method or property for that declaration, which doesn't surprise me but I wanted to try everything.I dont see how it would matter in this case but I am running Windows XP Pro SP3, though I also see the same behavior in Windows 7 64 bit ultimate sp1 and windows 7 64 bit pro.
How To Combine Combo Box Contents
Mar 16, 2010I have this, birthday selection which is in 3 combobox, 1 for month, 1 for day and 1 for year. But my database table has only this birthday attribute(no year, month or day).
How can I combine the items that are selected in those 3 combo boxes so that they would be fitting in the birthday column?
Save Contents Of Combo Box To Access Later?
Dec 14, 2010I have a combo box, that i have linked to a text box, to save continious data. How would i save the contents of that combo box?
View 1 RepliesVS 2008 - Colorize Contents Of A Combo Box
Sep 4, 2010is it possible to colorize the contents of a combo box ? Practically I'd like the various texts in the combo box to have various colors (i.e. the first element to be in green color , the second in red etc) . I know this might sound funny but if it is possible it would be fun to use it !
View 3 RepliesDisplay The Contents Of A Cell (excel) Into A Combo Box
Jan 25, 2011I need some help displaying the contents of a cell in excel into a combo box. I've been able to display if the contents of excel are numbers but can't seem to figure out how to display text.
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")
Copy Contents Of One Array Of Booleans To Another, Preserving Contents But Adding Additional Boolean Values?
Nov 11, 2010i have an array of booleans whose current boolean values I want to preserve but add additional length to the array? How can I achieve that? My code looks like this:
Dim Array() As Boolean
Dim ArrayInterimShort() As Boolean
ReDim Array(119)
[code]....
Validate The Contents Of A MaskTextBox With Contents From An Array Or List?
May 10, 2011I am trying to create a code where I placed sets of numbers in an array.I'll use a masktextbox to have the user enter the numbers to match what's in the array. If the user enters the number, ex: social, and the data is correct (matches the numbers in the array), something happens if the number entered in the masktextbox does not match any of the number sets in an array then another thing happens.The masktextbox so far only validates format and gets number only, however, I want the number entered to match whats in the array.
View 1 Replies.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 RepliesPick A Word In Combo Box A That Has Specific Words/phrases In Combo Box B Show?
Feb 24, 2009i wanted to link options selected from Comb box A (general) to specific options in combo box B (specific). I want to pick a word in Combo box A that has specific words/phrases in Combo Box B show. But not all the words to show in the combo box B if they aren't associated with the Word picked in Combo Box A. Ex.When "Soda" is picked in A, only "Coke, Sprite, Fanta" should be visible in combo box b, not everything else.This is the code i used to make the boxes, but i don't know how to link them.
Private Sub MainForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
' fills the combo boxes with values
Me.xGeneralComboBox.Items.Add("Soda")
Me.xGeneralComboBox.Items.Add("Juice")
[code]....
Use A Databound Combo Box To Display One Field In The Drop Down And Another As The Combo Box Text On Roll Up?
Feb 21, 2012How to use a databound combo box to display one field in the drop down, and another as the combo box text on roll up? Using VS 2005... For example, I have a datatable that has 2 fields. One called "ShortDesc" and one called "LongDesc". I want to be able to see the "LongDesc" column values in the drop down on the combo box. When I make a selection, I want the text in the combo box to read the corresponding "ShortDesc" value.
[Code]...
Object Null Combo - Error When Try To Populate Some Combo Boxes With A Value
Nov 16, 2011I am getting an error when i try to populate some combo boxes with a value, the combo box has values in and the right amount the code is getting the right number.
the error msg is "Object reference not set to an instance of an object."
One Combo Box Fills Another And Hits The Second Combo Box's Lost Focus Event?
Jun 7, 2012Combo box 2 is filled based on a selection made in combo box 1 and a listview is populated based on the selection made in combo box 2.When the LostFocus event completes in combo box 1, it hits the LostFocus event in Combo Box 2 but it shouldn't. How do I prevent this from happening or if I can't prevent it, how do I work around it? The following is the code used.
Private Sub cboCategory_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles cboCategory.LostFocus
[code].....