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 Replies
As a non .net programmer I'm looking for the .net equivalent of the old vb function left(string, length). It was lazy in that it worked for any length string. As expected, left("foobar", 3) = "foo" while, most helpfully, left("f", 3) = "f".
In .net string.Substring(index, length) throws exceptions for everything out of range. In Java I always had the Apache-Commons lang.StringUtils handy. In Google I don't get very far searching for string functions.
Edit:@Noldorin - My first encounter, although it took me several seconds to do the same in c#:
[Code]...
Note the static class and method as well as the this keyword. Yes, they are as simple to invoke as "foobar".Left(3). See also c# extensions on msdn.
this is not working?
[Code]...
End WhileI am trying to read from the ": " to the end of the line. I keep getting this error: Index and length must refer to a location within the string. Parameter name: length
am getting the above exception while swaping Items in the list(lstRoutePriority).PFB my code
if (lstRoutePriority.SelectedIndex > 0)
{
//Swap the two items
[Code].....
I have a field displaying on a datagrid that the user has asked to be variable length based on the data that is returned. Is there an easy way to determine how many characters are returned for a field and then converting that to a pixel length so that I can change the length of the field in the code.
View 2 Replies"Index and length must refer to a location within the string. Parameter name: length" whenever I run this code
[Code]...
If using the following in an if statement I get an error: If trg.Name.Substring(4, 6).ToUpper <> ("ABCDEF") Then I get the error: "Index and length must refer to a location within the string. Parameter name: length"
I assume this is because the string (trg.name) is too small for the 4, 6 substring. What would be the correct method of working around this problem? VB.net Studio 2008.
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
[Code]......
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 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?
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 RepliesHow 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
[code].....
I am using VB 2008 & drawimage function to copy image A to Image B. My problem is image A has many different colored patches on it and I only want to copy the ones that have a certain RGB value. I was going to set the masking color to the RGB value but remembered that defines the color to ignore - Im interested in the opposite.
I know I could loop through all the pixels and check its color, but its way slow and Im hoping theres something better?
how to create an 'Access-like' input mask for hastening date data entry.
Using C Pearson's much quoted code I've modified it as such:
Private Sub Worksheet_Change(ByVal Target As Excel.Range)
Dim DateStr As String[code]....
Note: I'm aware that most of the time I'm simply re-typing the original code - it was a learning experiencing and I also realised that the different American and Australian date formatting was less of a programming issue due to the systems being set up differently in the first place.My issue is having run tests using only 4 digit entry, all types of digit entry, with and without DateValue on the final DateStr, changing the cell format to text, to general, to date - always results in a code like "8811" (i.e. 08/08/2011) being changed into 01/01/1924 (approximately).
At first I assumed the use of "DateValue" in assigning the final .Formula value was forcing this conversion. However, with or without DateValue it still seems to read the figure as a DateValue and convert it as such.I'm sure it has to be something elemental that I'm missing given the scores of people I alone have seen on boards reading C Pearson's code and not coming up with another peep.
How can i mask NIC number while eneteing NIC information???
View 1 RepliesIs there a way to get a mask for a localized short date format, into a MaskedTextBox, other then manually replacing the dd, MM and yyyy by #s ?
View 5 RepliesHow can you hide the filter of the masked textbox?
View 7 Replies
