CheckBox Unchecked - Clear Contents In RichTextBox
Jul 2, 2009
I 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
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Jun 30, 2009
I've got a form with parent-child setup. The parent displays name and other demographic info.The child displays multiple addresses, one row at a time. There can only be one primary address for a name and this is designated by a checkbox at the top of the child form.If the user wants to change the primary address to another address,then they find the other address and click on the checkbox.The form checks the other addresses and if one is found that is designated as primary,the user is warned that one already exists and prompts them to change it.
So for example, a name has 2 addresses, the 2nd being the primary address.The user wants to change the 1st address to be primary.They click on the Primary Address checkbox for the 1st address.A warning displays that there is already an address listed as primary.The user then answers the prompt to change the 1st address to the primary address.The checkbox for the 2nd address will be unchecked and the checkbox will be checked for the 1st address.My problem is getting the checkbox unchecked for the 2nd address.If I close the form and reopen, then the checkbox is unchecked.How do I refresh the checkbox for the 2nd address?Here is the code I'm using to find if an address has already been marked as primary:[code]......
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Mar 3, 2012
I want to create a solid checkbox that is checked by default, and is not clickable. If you click it, nothing will happen . how to do this?
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Oct 3, 2010
I have a very stubborn check box . Let me tell you its story :There is Form1 with a button leading to Form2 . On Form2 there is located that stubborn check box I was telling you about . That check box has code in its CheckedChange event and accordingly to its Checked condition , it enables or disables some text boxes .Well , the first time Form2 is shown , that check box works fine : when I check it it enambles the text boxes and when I uncheck it , it disables those text boxes .Then , I press the button to return to Form1 . If needed , the code in the button is :Form1.ShowMe.CloseMy adventure starts when I show again Form2 ... This time the check box is acting weirdly . No matter if I check it or I uncheck it , it always disables the text boxes , as if it is constantly unchecked ! I can see it changing its checked state whenever I click on it , but it always runs the code to disable the text boxes.
I even used some break points in the code and found out that indeed it is the code that disables the text boxes that is called every time , no matter if the check box is checked or unchecked .I don't thing this has anything to do with the fact that this event is called by all the 4 check boxes on the form . After all , it is always the 1st check box that causes the problem (I can see it when moving the cursor over the genericindex variable) .
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Jul 12, 2010
I have a datagridview with 3 checkboxes, Yes, No and InV.At runtime, I want the user when he checks one checkbox the other two are unchecked by default. Therefore, at whatever one time ONLY one checkbox will be checked.
[Code]...
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Nov 16, 2009
I'm trying to set my software up so that when I check the checkbox for winRAR to be installed, it'll pop up a new window asking if I want to install the 32 bit version or the 64 bit version. I have no problem getting the window to show up but than if I try to exit out of the window and than uncheck the box (in case it was accidentally checked) it'll just open the window again. I am thinking I have to tell vb that when I uncheck the box it shouldn't do anything.
Here's my code.
(I know that the Nothing under the Me.chk_rar.Checked = False doesn't work but I left that blank once and it just opened a bunch of windows and crashed my system. I know it says "E:Music" right now but I just pointed it there so that there was something there normally it'll point to the other window. If I need to created a new Form for every little window that I have for instance the little window that I want to pop up, do I need to create a new form just for that little window to ask which architecture is needed and than giving the options for 32 bit or 64 bit.
Private Sub chk_rar_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chk_rar.CheckedChanged
Me.chk_rar.Checked = True
Process.Start("E:Music")
Me.chk_rar.Checked = False
Nothing
End Sub
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May 14, 2012
I have a checkbox list which is filled with entries from my database on page load. I need to update an entry in my database when a item is checked and when an item is unchecked. Right now I am doing the following:
<asp:CheckBoxList id="check1" AutoPostBack="True" TextAlign="Right" OnSelectedIndexChanged="Check" runat="server">
</asp:CheckBoxList>
And the function:
Sub Check(ByVal sender As Object, ByVal e As EventArgs)
Dim sql As String
If check1.SelectedItem.Selected = True Then[code]....
The error is: "Object reference not set to an instance of an object." Is there a better way to check if a list item is checked or unchecked?
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Mar 29, 2012
I use a textbox for input unless one of the checkboxes is checked, then the textbox needs to have a value of 1 which I have working.What I need is a way to lock the textbox if the checkbox is check and allow data if it is unchecked.[code]
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Aug 17, 2010
so im dynamically populating a checkbox list. I have confirmed that my text and values are correct for each checkbox but when I check a few and click my event button when I loop through the items they are all set to select=false...
Dim resource As ListItem
Dim SelectedHashTable As New Hashtable
For Each resource In chkResources.Items
[code].....
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Mar 16, 2010
If for textbox it is textbox1.clear, etc.What is the equivalent for combobox to clear the value.
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Dec 31, 2008
I 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.
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Jul 22, 2009
How can i clear the contents of a datagridview.[code]...
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Feb 21, 2010
I 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
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Feb 16, 2011
I 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!
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Jul 22, 2010
I'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.
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Mar 10, 2009
how 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]...
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Oct 28, 2009
I 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() ?
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Jun 22, 2009
Public
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]......
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Mar 18, 2011
What 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.
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May 21, 2012
I am using a Checkbox outside of a datagrid. When i select the check box autopostback is true, and this would then show the image, but i cant access the images within the datagrid with that script. If i use a seperate image outside of the datagrid the script works. How can i get this script to work finding when the checkbox out side of the datagrid is checked to then show the image within the datagrid?
The script i am using is
<script runat="server">
Sub Check(sender As Object, e As EventArgs)
[code].....
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Sep 15, 2009
I have a RichTextBox that contains a Customer History.
I need to be able to print the contents, allow users to select the printer they want to use, and print the contents without running off the printed page.
I'm using vb 2008 with Vista.
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Jul 8, 2011
how to display richtextbox contents in Datagridview. Wat i am doing is on button_click1 i am loading text files to richtextbox and on button_click2 i am saving it in a Drive and loading from there to Datagridview is there a alternate way to directly load from richtextbox to Datagridview
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Aug 19, 2010
I was wondering how I could go about returning the dimensions of the rectangle of the content inside a richtextbox? For example, suppose I have a richtextbox on a form with the text "Measure this text and graphic as a rectangle" entered into it and a small graphic object that I load into the richtextbox. How would I return the Rectangle of the text and graphic within the richtextbox?
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Feb 4, 2011
I want to print the contents of my RichTextBox1.Text how can I do this?
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Aug 10, 2011
I have 42 RichTextBoxes (RTBs) and I would like to add my ContextMenuStrip to each of them (which I have already done), but the problem I am having is when the application is running and the ContextMenuItem "Copy" for example is clicked, I can only make it copy the context of one of the RTBs, when I would like it to copy the contents of any individual one. So as I mentioned, I have 42 RTBs, but I am having trouble getting the contents of the focused RTB. The below code is just copying the 1 RTB and when I Copy on another RTB, it copies the contents of RTB1.
I originally started out with like so, but is just for the one RTB and when I add more than one in the code below it's even more of a disaster..
Private Sub Copy_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Copy.Click
RichTextBox1.Copy()
End Sub
I tried using this, but I was not sure how to add the copy function into it:
Private Sub Copy_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Copy.Click
Try
For Each itm As Control In EnumerateAllControls(Me)
For Each c As Control In itm.Controls
If TypeOf c Is RichTextBox Then
[Code] .....
How to Copy ContextMenuItem to focus on the user focused RTB.
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Oct 22, 2009
I have a richtextbox contains Texts and Table. Now I want to send this richtextbox contents as email body message including table lines,
is it possible?
Dim Mm As System.Net.Mail.MailMessage
FrmMail = "onel@dreamincode.net"
ToMail = "mahey@dreamincode.net"
[code]....
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Sep 21, 2009
I have one Field in MYSQL DB. Name is ' Field1 '. I can store the Richtextbox text(it contains Bold, Italic, Etc). using the code ' Richtextbox1.rtf 'But when i am trying to display using 'Richtextbox1.rtf=dt.rows(0).item(0).tostring ',It shows 'File Format is not Valid '.
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Dec 12, 2010
I want the strings of RichTextBox1 and RichTextBox2 (strings are separated by newlines) printed to RichTextBox3 along with selected RadioButton's name and ticked CheckBox's name.[code]
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Feb 27, 2010
is there a way that i would automatically paste the clipboard contents to my richtextbox after the shell command?
my code goes this way..
shell("ocr")
richtextbox.focus
richtextbox.paste
my code won't paste the clipboard details after it has finished the shell process.
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Mar 2, 2011
How Can I EMail RichTextBox Contents By Default Email Client Using vb.net?
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