RichTextbox - How To Mark Cursor To Stick In Character Position
Mar 7, 2011
I am using a WPF richtextbox to create a syntax highlighter for code provided in a textbox. I want to have it automatically adjust the rich textbox as I am typing, using a thread timer I reset the contents of the rich textbox. I am trying to keep the cursor where it is suppose to be. I don't loose any text characters during the parse (except line breaks).
I don't know how to keep the caret position where the user has left it in the text. It defaults to the end of the document. I attempt to store the current caret position in the text and then set it to the document after I make my changes, however the error I receive is "Cannot set CaretPosition to be outside of RichTextBox." So I set the caret position to the bottom of the document.
WPF, VB.net, .net Framework 4.0
Here is the code.
Public Sub FormatText()
If IsNothing(rtfContent.Document) Then
Exit Sub
End If
Me.rtfContent.IsEnabled = False
[Code] .....
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Dec 12, 2011
Trying to set the cursor position in a RichTextBox. The contents of a document are opened into the RichTextBox and I would like the cursor to move to the very start of the text.
At the moment, I'm using:
Me.tbLowerBody.SelectionStart = 0
Me.tbLowerBody.SelectionLength = 0
However, this seems to provoke my "Would you like to save changes" dialog on closing the RTB even though no actual changes have been made.
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Sep 22, 2010
How to get the line number where the cursor is in a RichTextBox? I'm using VB 2010
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Nov 26, 2010
I Would like to position the cursor in a text box using X,Y coordinates with X being the line number and Y being the column number. Is there any way to determine the line and column numbers of a textbox that is full of text. Using the .selectionstart paramenter only lets you position the cursor a certain distance from the beginning of text but there is no line information that I know of. By the way, I not an expert at VB so bear with me if these questions seem kind of basic.
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Dec 1, 2011
I m making a chart using MS Charts. Now the chart has mark points from where i want to get the coordinates if user clicks on the mark points.
I want interactivity in the chart such that on clicking on the mark points i can retrive the cordinates (x-axis and y-axis) for the mark points.
For example for the graph:-
on clicking on the orange dots or blue dots i want to get the cordinates for that point,
for example the first blue point is (10/11/2011, 49)
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Jul 19, 2010
When I run this code, it gives me an error when vision_patid shows a value - 11BC.
Incorrect Syntax '11' - Unclosed quotation mark after the character string ''.
Code:
query = "UPDATE tblProjectPatients SET " & _
"Yes ='" & CBool(DgvReturns.Rows(irow).Cells(2).Value) & "', " & _
"No ='" & CBool(DgvReturns.Rows(irow).Cells(3).Value) & "', " & _
"InV ='" & CBool(DgvReturns.Rows(irow).Cells(4).Value) & "', " & _
[Code] .....
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Dec 30, 2010
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim SQLData As New System.Data.SqlClient.SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|Database.mdf;Integrated Security=True;User Instance=True")
Dim cmdSelect As New System.Data.SqlClient.SqlCommand("SELECT * FROM Table1 WHERE Date ="
[code].....
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Apr 28, 2010
I received the following error when the function shown below:
Unclosed quotation mark after the character string ')'.
The name "test" is not permitted in this context. Valid expressions are constants, constant expressions, and (in some contexts) variables. Column names are not permitted.
Private Sub addnewprojtype()
Dim query As String
Dim cmd As New SqlCommand
Dim conn As SqlConnection = GetDbConnection()
[Code] .....
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Aug 12, 2010
I have the following update code which works fine. However, it prompts an error when apostrophe (') is used in txtdesc.text. For example if you type name's , the error message will be..
Incorrect syntax near 's'
Unclosed quotation mark after the character string ".
query = "UPDATE dbo.TblProjects SET ProjectDesc ='" & _
txtProdesc.Text & "' where ProjectID='" & _
txtProjectID.Text & "'"
cmd = New SqlCommand(query, conn)
cmd.ExecuteNonQuery()
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Feb 5, 2012
I am facing an error in vb.net and sql server while inserting string value "Name D'Souza" into SQL. The error is "Line 1: Incorrect syntax near Souza. Unclosed quotation mark before the character string ' " In VB.net Variable is declare as string, in Stored Procedure and in SQL Table variables are declared as Varchar.
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May 20, 2010
This function gives me the folowing error; Unclosed quotation mark after the character ')', Incorrect syntax near ')'
Private Sub Exportdatapateid()
Dim cmd As New SqlCommand
Dim conn As SqlConnection = GetDbConnection()
Dim query As String
[code].....
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May 10, 2010
I get the following error:
Line 1: Incorrect syntax near ','. Unclosed quotation mark before the character string ' )'. at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException
[code]....
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Feb 22, 2011
when saving am getting this error"undiscclosed quotation mark after the character string')'.incorrect syntax near ')'.I used the command in other codes which working perfectly. [code]...
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Sep 26, 2009
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
TextBox1.Clear()
TextBox2.Clear()
End Sub
How do I make the cursor appear in textbox1 after clicking the button?
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May 3, 2011
I'm trying to get the cursor position within a webbrowser control, and then create a text range starting from the cursor to a specified word or character.I have some code but instead of selecting the specified range it selects the whole html block.
[Code]...
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Sep 15, 2009
Private Sub pSalar_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs) Handles pSalar.MouseDown My problem is that this panel is the parent of labels, and when I click somewhere on the panel, I can't get it to trigger the event. If I remove the line below, it works ok (but then obviously it's not holding any children labels anymore)[code]....
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Jan 31, 2008
In my application which is written on vb.net,i search for a word by typing the same in textbox here i have doubt to focus the cursor in the text box.. if i press first letter, say 'a', in textbox that will automatically search what are the words start with 'a'but after searching, cursor is not focussed in the textbox and to type another letter, say 'b', i need to bring my mouse pointer over the textbox and click so that i can type another letter.how can i keep my cursor focussed in the textbox unless i click somewhere else.
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Oct 6, 2009
I My Problems is when i don't put number and the textbox is empty TextBox string value but the cursor is integer i tryed whith if not string.isnullorempty but have an invalidcastexception in SetCursorPos(MousePositionX, MousePositionY) and if i put all as string happens the same whit the infinite value (empty textbox)
Public Class Form1
Private Declare Sub SetCursorPos Lib "User32" (ByVal X As Integer, ByVal Y As Integer)
Private Const MOUSEEVENTF_LEFTDOWN = &H2
[Code]....
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Feb 15, 2011
I'm making some snippets and I want to position the cursor. I've come acros "$end$" but all examples I see are in c#. Since recently I've started programming in vb.net again and it seems $end$ isn't recognized or doesn't work here. Is there another keyword in vb to do the same?
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Jan 25, 2012
the program is that user add numbers in textbox through number buttons (its a calculatornow i have to add 2 more buttons. one <- and other -> and when press one of them the cursor moves in the text box left and right.i tried few things but none works. i have tired to insert "|" first and then try to move it but it either keep on adding or deleting the text.here is what i have tried so far . its not the whole code as i keep on adding and removing.
Dim str As String
Dim loc As Integer
If txtInput.Text.Length > 0 Then
[code]......
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Jul 21, 2010
I'm trying to set a new cursor position but I get this error:
A call to PInvoke function 'mon! WindowsApplication1.Form1::SetCursorPos' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target unmanaged signature.
Here is the code:
Declare Function SetCursorPos Lib "user32" _
(ByVal x As Long, ByVal y As Long) As Long
SetCursorPos(457, 603)
It used to work when I used VS 08 but now I use VS 10 and this problem has started to appear.
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Oct 6, 2010
i need to add an text at the end of the cursor position in vb .net .i tried
TextBox1.Text = TextBox1.Text.Insert(TextBox1.SelectionStart, "<br>")
it works but the cursor position sets to starting position
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Apr 12, 2012
I want to add a picture box to the form every time the mouse is clicked. But i want the cursor position to be the center of the picture box location.
Private Sub Form1_Click(sender As Object, e As System.EventArgs) Handles Me.Click
Dim PB As New PictureBox
With PB
[Code]....
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Jan 20, 2009
This is maybe an weird question because I don't know if its possible so prepare .I am working on a project its a kinda autoclicker.It moves the cursor to positions and perform mouseclicks it all works perfectly.So when it runs you can't do something else on the pc because the cursor gets moved every 1-5 seconds.So I wanna now if its possible to kinda attach it to the program I am making it for so it moves the cursor and do clicks within the form of the program.
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Mar 5, 2010
I am trying to use a windows form as a custom contextmenu which is fine as I have done a form with translucent background colour. However the problem is that I am having problems displaying the form at my cursor position. I have a mdi chaild form in my app and when I right click I want to display my custom contextmenu form at the point where I right click in the mdichild form. The only other thing is that I want the middle of the form to be displayed at the cursor point.
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Sep 10, 2009
How do I get the name of the (topmost?) control at the cursor position? The background: I implemented drag'n'drop from a dgv to a label and need to identify the control where the mouse button is released. I have enabled dropping on the label where the drop is going to take place. However, this label is the parent of say a hundred labels that are created dynamically in codebehind (I use this way to create a "dataview"). Therefore, I need to know which of these "child" labels the user drops the data onto.
I can get the mouseposition without problems (Me.PointToClient(Cursor.Position).ToString), but as I said, I can't get the name/text/ID of the control the user dropped the data on. Also, I ned to get the child control's name/ID/Text, not the parent label of course.In addition, it seems as if I can't select the row I click on in the dgv anymore, after I implemented the DoDragDrop on the CellMouseDown event. Any ideas? Should I use another event?
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Nov 4, 2010
I'm having a difficult time getting cursor's position within the window I tried using : Cursor.Position.X and Cursor.Position.Y but it returns the position of the cursor on the screen and not in the window...
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Nov 17, 2009
What would be the proper way to get the cursor position while the mousebutton is held down? I've tried using a do while loop with a background worker, but it freezes up the application.
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Nov 12, 2010
Would someone advise as to why the cursor position code does not work in the downloaded code snippet this code is from the second tutorial located within VB 2010. The debugger moves through the method but the cursor is not affected in any manner i.e does not move to position 10,10 when called to do so.I am using XP windows 2003 as a virtual machine through Macintosh OS X 10.5.8 -maybe this has an effect somehow? [code]
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Mar 15, 2012
I have the following code to set the cursor position in a 16bit display:
linCursor.x1 = VB6.PixelsToTwipsX(lblDisplay(pintCursorPos).Left) + 10
linCursor.x1 = VB6.PixelsToTwipsX(lblDisplay(pintCursorPos).Left) + 10
linCursor.X2 = VB6.PixelsToTwipsX(lblDisplay(pintCursorPos).Left) + VB6.PixelsToTwipsX(lblDisplay(pintCursorPos).Width) - 10
I need this code to be converted to vb.net.
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