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Read about GDI+ . I'm new to graphics too in vb.net as well.
Also, http://www.dotnetforums.net/
that site has a forum devoted to graphics. You might be able to find info there.
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I am calling a VB6 dll from a vb.net windows application that returns an array of strings. My issue is it seems to truncate after a NULL character.
For Example VB 6 is returning a string with the HEX value of 4E 31 00 00 01 00 20 20 20 20 20 00 00 00 20 20 20 31 32 30
But when it gets back to Vb.net all I have is 4E 31 or “ N1”
Now I can return the same string as a return value of a function and I get it all.
Please Help,
Patrick Horn
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Hi,
I have developed several VB6 components that 'run' on a server on behalf of client application requests. So far so good...
Now we move to a Win2k cluster in order to enhance availability.
What _can_ i do or _should_ i do to make my own server components working in a fail over scenario? Just cannot find anything usefull at MSDN.
Tia Aad Slingerland
Aad Slingerland
Zevenaar
The Netherlands
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Hi,
I am trying to insert a value into a access database field but the value i am tyring to insert has an ' in it and i think that is what is causing the problem. for example
dataadapter.insertcommand.commandtext = "insert into table1 (clientname) values " & txtclient.Text & ""
I think that if the user enters something with a ' in it i get an error. Can any one please let me know if i am right and how to fix it?
Thank you,
Santana
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you need to replace the single quote with 2 single quotes.
insert into table1 (clientname) values ('o''neil')
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What if i am getting the data from a textbox?
Thank you,
Santana
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do this first
textbox1.text = replace(textbox1.text,"'","''")
or
replace(textbox1.text,"'","''")
Marvin N. Guerrero
- Casting More!!
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When you're done, please let me know the URL to your website, so that I can practise SQL injection attacks and delete your database.
Thanks in advance,
Steve
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Use parameters so you don't have to worry about escaping your input. It's also safer than concatenating SQL statements.
Charlie
if(!curlies){ return; }
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Here you go. Just use these prior to saving or retrieving any text field.
Friend Function SingleQuoteTextFromDB(ByVal text As Object) As String
'If a user saved a single quote in a text field, it was changed to
'2 single quotes. This function reverses the changes when displayed
If Not text Is Nothing Then
If Not text Is DBNull.Value Then
If InStr(text, "''") Then
Return Replace(text, "''", "'")
End If
End If
End If
Return text
End Function
Friend Function SingleQuoteTextToDB(ByVal text As String) As String
'If a user enters a single quote in a text field,
'This will replace the single quote with 2 single quotes
If Not text Is Nothing Then
If Not text.Length.Equals(0) Then
If InStr(text, "'") Then
Return Replace(text, "'", "''")
End If
End If
End If
Return text
End Function
Michael
I firmly believe that any man's finest hour, the greatest fulfillment of all that he holds dear, is that moment when he has worked his heart out in a good cause and lies exhausted on the field of battle - victorious.
Vince Lombardi (1913-1970)
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The values aren't actually stored with the second quote, therefore values don't need to be decoded after being retrieved from the db.
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Thanks for all the help Guys, i used the replace method that Guerven suggested.
Santana
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I am trying to write a code for enabling and disabling a textboxes for output and for input during certain times in the program.
One of my textboxes is PartNumber.text. At the beginning of the program I want to disable this box; however, if they want to add another Part this box will become clear so they can input a number so I want it to be enabled.
I am confused on how to write it.
Thank you,
ibok23
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You use the Enabled property of the TextBox control. When to enable it and disable it depends on your design.
If I remember right, you were using menus to do Add, Delete, ...
If the Click handler of the Add MenuItem, you would use something like this:
Private Sub mnuAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuAdd.Click
txtPartNumberTextBox.Enabled = True
... the rest of your code to enable controls and buttons goes here ...
End Sub
The user would have to click some button you have on your form to tell your app that all the data is entered and to process it to add it to a database. This button has a Click handler. This is where you would disable the textboxes and buttons you need to:
Private Sub btnAddData_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAddData.Click
txtPartNumberTextBox.Enabled = False
... the rest of your code to disable controls and buttons goes here ...
... also the code to process the data to add goes here...
End Sub
RageInTheMachine9532
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i would like to know info regarding code or component info for writing a program to up load files dynamically to a FTP site by supplying uid & pwd. it should be able to send files to FTP site dynamically without user intervention.
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I would like to use a regular expression to evaluate text for a specific pattern. Here is the pattern and the rules: (A123.B12345678) the first character must be a letter, it must contain at least one character but no more than 8, no characters other than letters and numbers followed by a . and then the first character must be a letter, it must contain at least one character but no more than 8, no characters other than letters and numbers.
I am currently using ^[a-zA-Z]\w*\.+\w{1,8}$ It's close but not quite what I need.
All help greatly appreciated!
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Your requirements statement seemed to be a bit ambiguous, so I'm not exactly sure if I nailed it.
[a-zA-Z]([a-zA-Z]|\d){0,7}\.[a-zA-Z]([a-zA-Z]|\d){0,7}
a.B wanted true is True
A6787.f9fds33 wanted true is True
v387f56.c wanted true is True
c.a546ff6 wanted true is True
234.f3455tt wanted false is False
a123,ff00f9 wanted false is False
a123..errew wanted false is False
a123.a123.a wanted false is False
Charlie
if(!curlies){ return; }
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Sorry for the ambiguity. Your solution is exactly what I needed. Thank You!
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I would like to know from friends that how can I enable/disable HTTP 1.1 Setting of IE programmatically.
I want to have on ActiveX control to do this trick.
Can any VB Genius help me in this regard?
Please give me tips and suggestions for develpment?
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You would have to P/Invoke the WinINet functions InternetQueryOption and InternetSetOption to get and set the INTERNET_OPTION_HTTP_VERSION flag. You'll also need to define the HTTP_VERSION_INFO structure. In order to get and set the IE defaults for the current user that is logged in, you must use NULL for any HINTERNET handle. So don't use InternetOpen to get an HINTERNET handle.
All the docs can be found here[^].
RageInTheMachine9532
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i wish to create a save function to save the content of a picturebox to jpg or bmp format.. anyone can help me plz... any help is greatly appreciated...
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Look into the Save and SaveAdd methods of the Image class. You'll get the Image from the PictureBox Image property. Something like this:
Dim imgToSave As Image = PictureBox1.Image
imgToSave.Save("C:\TestImage.bmp", ImageFormat.Bmp)
You'll have to specify the full path of the filename and the ImageFormat specification.
RageInTheMachine9532
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I'm working on a "image processing" application...
This is what I want to do...
Take a TIF file, convert to PDF with 10 dpi and add couple of texts to the bottom of the image...
This is doable in Java but I'm not familiar with Java and like to know if it can be done in .Net? if so, any ideas, sample websies would be great..
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I'd bet a huge pile of money that you can't do that in Java out of the box any more than you can in .NET. How do you know it can be done if you don't use Java ?
You can buy components to do what you want in .NET, and if your requirements aren't too complex, there's some free stuff on source forge. I am sure that is the case for Java also.
Christian
I have drunk the cool-aid and found it wan and bitter. - Chris Maunder
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ex-coworker did it in Java... but she was laid off and we cant use her code anymore...
these are some of her code:
Document document = new Document(PageSize.A4, 50, 50, 50, 50);
.....
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("tiffTest.pdf"));
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