I am trying to verify that I have a valid subnet mask. I have already verified that the string format 255.255.255.0 or whatever 255.255.240.0 converts to a UInt32 but now I need to make sure its actually a subnet mask.
The bits should be split between 1's for the network part and 0's for the host part. It should start with all 1's and end in all 0's if it goes from 1's to 0's then finds any more 1's its an invalid subnet mask.
How can I convert a subnetmask into binary, so I'll end up with 32 digits? I can convert it into Binary, using Convert.ToString(Long-to-convert, 2). But a subnetmask of 255.255.255.0 returns(it returns it without the spaces though):
1111 1111 1111 1111 1111 1111 0
When I want it to be:
1111 1111 1111 1111 1111 1111 0000 0000
How can I convert a subnetmask into binary, so I'll end up with 32 digits?I can convert it into Binary, using Convert.ToString(Long-to-convert, 2)But a subnetmask of 255.255.255.0 returns(it returns it without the spaces though):
1111 1111 1111 1111 1111 1111 0
When I want it to be:
1111 1111 1111 1111 1111 1111 0000 0000
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I need test data for a IP Subnet calculator I have developed. I have tested some obvious scenarios, and all seems good, but the person developing can often be the wrong person to test.
The calculator can do one of two things:
1 - Given an existing network and CIDR (mask), and a new CIDR it will create a number of networks with the appropriate number of hosts.
2 - Given an existing network and CIDR (mask), and a list of c,h, (c = count, h=number of hosts) it will create the networks.
As part of my application I am hoping to be able to get the user to enter their IP address and subnet mask which will then enumerate all of the hosts in between which can then be scanned for various open ports/applications installed.
For instance, With a network of 10.91.100.0/255.255.255.252 hosts are valid 10.91.100.1 - .2
How can this be done in vb.net? I would assume also some error checking would need to be put in place to confirm as to whether the subnet mask was valid as well?
Can anyone point me to some code which can help obtain the network address from the host IP and subnet mask?
View 3 RepliesI have a MaskedTB whose mask is "000 Years 00 Months". I have read the documentation for the mask and for '0' in the mask it says
Quote:
Digit, required. This element will accept any single digit between 0 and 9 Then why is it accepting space
How do I mask my webclient with a proxy? I need to download a page, but I need to download it with a specified proxy.
View 5 RepliesI know you can use regex to verify an email address format, but is there a way to, outside of sending an email to the address to verify that an email address is actually a working email address?
View 4 RepliesI am writing a program to analyze error logs from an existing application, and I want to consider only lines that have a Date/time stamp at the beginning of each line.( in the format "03/13/08 08:03:58") I am extracting this as a string and want to evaluate it to make sure it is a valid date so I am using "IsDate(Mid$(TextArray(i), 1, 18))". The problem is that IsDate evaluates False even when the string I am passing should be valid (eg. 03/13/08 08:36:59).
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my ip is 10.10.10.66 my subnet mask is 255.255.255.0 want to get all other computers ip address?
View 13 RepliesI am working on an application that collects data from PCs on the network using WMI queries. Is there any sample code that knowing the subnet would autodiscover PCs nearby?
View 4 RepliesI have a folder on my server(windows 2003) that I would like to copy to all computers running Windows XP on a particular subnet.
View 1 RepliesI need test data for a IP Subnet calculator I have developed. I have tested some obvious scenarios, and all seems good, but the person developing can often be the wrong person to test. The calculator can do one of two things:
1 - given an existing network and CIDR(mask), and a new CIDR it will create a number of networks with the appropriate number of hosts.
2 - given an existing network and CIDR(mask), and a list of c,h, (c = count, h=number of hosts) it will create the networks.
I need test data for a IP Subnet calculator I have developed. I have tested some obvious scenarios, and all seems good, but the person developing can often be the wrong person to test.
The calculator can do one of two things:
1 - given an existing network and CIDR(mask), and a new CIDR it will create a number of networks with the appropriate number of hosts.
2 - given an existing network and CIDR(mask), and a list of c,h, (c = count, h=number of hosts) it will create the networks.
For a drop down combo box, if you place 0 as a custom mask, you can enter only numbers. If you place A as the custom mask, you can enter letters and numbers. How can I make it so that you can enter only letters?
View 3 RepliesI'm having trouble getting a masked textbox to properly store a date. I'm using the short date format 00/00/0000 but when I navigate to a record that only has a single digit date it displays incorrectly.eg. 12/01/2008 displays as 12/12/008_Surely there's a fix for this but I'm not finding it.
View 5 RepliesI have been using the following code to find files within a directory with a specific mask, without any problems except windows 7 platforms.
The Folder searched contains five(5) word documents with a .dotx extension
The following mask is being used:
"*.doc", "*.docx", "*.dot", "*.dotx", "*.pdf"
The search returns me ten(10) files as the *.doc mask returns the *.docx files too.
How can I get this to work on old windows platforms as well as Windows 7 with the same mask?
Dim
lFiles As
New List(Of
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I'm in MS Access 2003. I inherited a form with a text box. The text box has the following input mask. !(900") "000-0000;0; Here are my issues.
1. If the form is opened and I click in the text box at a point that is not leftmost, the cursor may not be placed at the leftmost position. Sometimes, it gets stuck at some point in the displayed mask. If I click in an empty text box, I always want the cursor to be leftmost. How can I create that behavior ?
2. If I get the cursor in the leftmost position of the text box and try to paste in phone numbers in certain formats, some of the input gets chopped off. ex: 555 555 5555, becomes (555) 555-{cursor} 555-555-5555 becomes (555) {cursor} IMHO, these formats are common enough that I would want a mask to accept it. Can I make the mask more general ?
3. What is the meaning of leading !, the double quotes, and the semi-colons?
I am trying to Mask Employee ID, so the user doesn't have to type the entire employee ID number CCETA01. I want them to type only two digit numbers. e.g. 01 to 99...
Here what I did but its not working:I draged from toolbox a Maskedtextbox on the Form and in the textbox progerties I put cce a. The entire number show up on my textbox pretty good but it does not allow me to change the two digit numeric number?
There are a number of textboxes I would like to validate. I first set up the key press events to only allow key entry's of characters which I feel are valid for this location (i.e. numbers and "." for dollar amounts). But in addition to this I would also like to ensure that the user entered something valid using an input mask. This may be a simple question but I couldn't seem to find the answer to it. If I have a input mask of ###.## and the user enters something like 4321.23, would this throw an error and if so, how should I set up my mask large enough so the user is able to enter large amounts.
View 3 RepliesHere is the
Option Strict On
Dim mask As ULong = &HFFFFFFFFUL
Dim result1 As ULong = 20L And mask '//disallows implicit conversions
Dim result2 As ULong = 20L And &HFFFFFFFFUL
If you put that into the IDE with Option Strict On, it will not let you compile because of 'result1'. I'm not sure I understand why. In the 'result2' assignment, I am explicitly saying to use an unsigned long, however it's not giving me any grief.
I have a data in combobox which is "2003010420030117", and the data is from datasource.
How do I make it look like " 2003/01/04 - 2003/01/17"?
I've come across code in a library that I want to use that I have never seen before (probably because I don't use c# all that much) and can't find any documentation on. It doesn't work in VB.NET and I'm not even sure of what it does so that I could go about doing it some different way. The expression is Mask.NullString(str).Length. Can anyone help me out please?
View 1 RepliesI am creating an application where the user inputs must be restricted. Of course, the MaskedTextBox control provides the basic functionality for this, allowing me to set up a fixed input-string length, include literals if desired, etc. However, in some instances the available input-character types (digits, alphanumeric, etc.) are not sufficient to provide the restriction I require.
For example, in one field the user enters a hexadecimal number, i.e., composed of only characters [0-9][A-F], but there is no option in the default masking language for that. It would be nice to be able to add a couple masking elements, such as H and h for required and optional hex digit respectively. For now, I just check the Text contents of the MaskedTextBox after each TextChanged event and warn the user/remove the offending character(s), but I would prefer to be able to customize the Mask.
Is there any straightforward (or even not straightforward) way to accomplish this? For example, by creating a custom MaskedTextProvider? If so, how would I go about it?
I have a need to apply a mask to a string programmatically and not through any type of Masked Edit Control. So for example a mask of (###) ###-#### would need to be applied to a string such as 5551234567 to create (555) 123-4567.
View 5 RepliesI have a masked text box for phone numbers. i want to save the results as a double but it includes the parenthesis and dashes. what would be the best way to remove the mask and save only the numbers?
View 5 RepliesI have a Masked Textbox whose mask is "00/00/00", on the click of a button i need to change the the mask of the MTB to "000 Years 00 Months 000 Days" and also calculate the appropriate values of years , months and days.
I have used the following code to calculate the years, months and date, I want to know how should i set these values in the Masked text box.
[code].....
I want to set the mask for the textbox for only letters and numbers with no spaces like thisthe "*" represents letters and numbers)
View 17 RepliesFor setting my processor affinity mask and I need my process handle for this. How do I get it?
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