Check If A String Is In Url Format / Url?
Mar 31, 2010
I'm trying to create an address bar, much like Google chrome's, where you can enter a url and it will navigate to it or enter just text and it will search Google etc.
I've been at this for a while Googling away, but I can't find a reasonable solution. I know I could look for things like: 'http' etc, but these come in an almost unlimited number of variations. I could also created a webbrequest to test its existence, but I think this could cause an unwanted slow down in the programs operations.
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Jul 28, 2009
I have encountered this error Unable to cast object of type 'System.String' to type 'System.IFormatProvider'. when i try to use a "if" statement to check for a certain string format in a the text of a string.heres the code i have done:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnInsert.Click
Dim unit As String = txtUnit.Text
[code]....
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Aug 15, 2010
with a system of regional date configuration as dd/MM/yy
isdate("13/08/10 10:00") ' returns true, but with a system of regional date configuration as MM/dd/yy
isdate("13/08/10 10:00") ' returns false
how to handle this situation, all i need is i want to check a string for convert able to valid date format & then convert the same.
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Sep 14, 2011
var queryString = string.Format("filename={0}&filestream={1}&append={2)", fileName, Convert.ToBase64String(b, 0, bytesRead).ToString(), 1);
above line of code giving error 'Input string was not in a correct format.'
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Jul 7, 2011
I have a function that is getting passed a String and a DataRow.The String is a custom formatter. The idea is to do this
String.Format(passed_in_String, DataRow("ColumnINeed"))
The reason this is being done is at this point we have no idea what the column contains.However, if the formatter is "{0:MM/dd/yyyy}" and the DataRow("ColumnINeed") is an integer containing 42, String.Format is returning: MM/dd/yyyy In this situation I need it to throw an exception instead of returning nonsense.Is there anyway to make String.Format throw an exception if the object does not match what the format string is expecting?
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Aug 26, 2010
So I need a format string to pass to String.Format that would "move" the decimal point.I can't perform any math operations before doing the String.Format, so it has to work right off the bat.Basically I'm emulating a formatting string from a proprietary server. In it if I say:
"MR2"
for the value:
12345
The result is:
123.45
I'm close with this, but it's not spot on:
String.Format("{0:#0.##}", 12345)
an extra, but not necessary... there is also MR2Z, which moves the decimal 2 left, but if the value is 0 "" is returned.
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Nov 4, 2010
however, i'm copying this directly from the book in its example format and still getting an error.
FormatException was unhandled
Input String was not in correct format
Public Class Form1
[Code].....
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Jul 1, 2011
I need to take a string formatted like '010711' (DDMMYY) and put it into format '01-Jul-11'. Ive thought about doing something like string.toArray and then having some conditionals that format from there but am looking for an easier way.
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Jan 13, 2010
I want to format the Timespan to have format like this 49 hr 34 mn 20 sec
I used the String format below :
String.Format("{0:00}:{1:00}:{2:00}", theTimeSpan.TotalHours, theTimeSpan.Minutes, theTimeSpan.Seconds)
It formats the Timespan to this format 49:34:20. How can I add hr mn sec to the String.Format above? or there's another easy way?
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Jun 16, 2009
I am using String.Format("{0:C2}", -1234)to format numbers.is always formats the amount to a positive number, while I want it to become $*-*1234
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Apr 5, 2011
I have a field that I display via: String.Format({0:c},amount) This produces the string "$28.28" However, when I try to convert back to a decimal amount, I get an incorrect format exception: amount = Decimal.Parse(amount.Text, NumberStyles.Currency) I also tried it with NumberStyles.AllowCurrencySymbol with the same results. I verified that the value in amount.Text is "$28.28". Am I missing something? Shouldn't these two operations use the same currency symbol and formats?
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Feb 19, 2009
The following is ment to generate the path to a text file and stream the data found there into an array.
Dim y1 As String
Dim y2 As String
Dim y3 As String
[code].....
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Nov 29, 2011
I'm trying to create a print function with a corresponding print preview. For some reason, any string I create with String.Format will NOT show up on the print preview! Use the code snippet below as an example:
Dim strTemp As String
strTemp = String.Format("{0, 210} {1, 75} {2, 51} {3, 200} ",
"NAME", "PRICE", "QUANTITY", "DESCRIPTION")
[code].....
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May 18, 2012
How to check if the folder is in the format yyyyMMdd
Example : I need to process the folders only with the format yyyyMMdd like folder name will be 20120518
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Mar 31, 2009
How to validate IpAddress. I mean how to check whether the entered Ip is in correct format?
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Sep 4, 2009
MyRow = MyDT.NewRow()
MyRow(1) = rs2.Fields("Field29").Value.ToString
rs2.Fields("Field29").Value has values like "YYYYMMDD" in a string.how can i convert a "YYYYMMDD" string to a needed date format like 'dd mmm yy' (or any format)
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Jun 22, 2012
How can i check the system date format? Tried with the code below, but when i change my system's date format to another date format to test the code, it's still showing the date format before changed!
System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.ShortDatePattern()
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Apr 29, 2011
I have a textbox where a user is supposed to enter a date. How can I check whether the entered date is in the correct date format?
Like this: 02/02/2008
not like this 022/22/-1
not like this 2009/02/02
not like this 02/Jun/2015
not like this 02/abc/2010
(I don't want to use DateTimePicker or MonthCalender).
EDIT 1 I tried it like this
Private Sub txtHireDate_Validated(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtHireDate.Validated
Dim dateString As String = txtHireDate.Text
Dim formats As String = "MM/dd/yyyy"
[code]....
But its showing some errors?
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May 8, 2009
Is there a way to find out the system time format? (If it's 24hour or 12 hour)
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Aug 26, 2009
I have a string eg. 10000 how i can change this string like this format 100.00.
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Feb 3, 2012
I am trying to use string.format on a url to pass several values into the string. It's probably a simple error but I cannot get the following code to work. It doesn't even build the string.
Public Sub getStockData()
Dim client As New WebClient()
Dim url As String
[code]....
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May 1, 2010
I have a text box on a form. It is a masked text box that shows in the format XX/XX.It is used for the expiry date of a credit card.What I need to do is how to take a value like 08/11 which means August, 2011 and check that it is in the future.For example something like 08/09 would be last year and hence would be invalid.Is there any way to take this string and check?
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Feb 19, 2011
Is it possible to check locale format on form_load and change it to en-us via registry if any other is preset?
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Jun 22, 2010
I got an app, which receives data via a R232 port, convert it to a string and on the other side I got a database, where the strings are saved. How can I find a way to compare the string with all strings in one database column and get back the another stringform the same row in this database. I never programmed a database
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Jun 9, 2010
Does anyone have a regurlar expression available which only accepts dates in the format dd/mm/yy but also has strict checking to make sure that the date is valid, including leap year support?
I am coding in vb.net and am struggling to work this one out.
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Mar 15, 2009
We know that VB string start and end with double quotes " "
So we have to use "" if we want " in VB string.
I wonder if there is a regular expression pattern which will match VB string?.
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Jun 8, 2011
i have a card number and i convert it into hexadecimal. After that i wan to set the format to 6 digit if the hexa card number has a length =5. so how i'm going to set the format?
[code...]
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Mar 29, 2010
I am trying to figure out how to use the format.string() function This is what I have. I have 3 data string inputs of the format as folllows:
pcname bigservername (maybe 20 character max)
ip address ###.###.###.### (ex: 192.168.1.10)
macid ##-##-##-##-##-## hex values for # (ex: 00-23-AF-33-BC-CE)
[code].....
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Sep 10, 2009
how to set a string format. like a declare it as double. but i want the string to be like xxx.xxx format. where x is any number or any letter.
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Jan 12, 2011
Why would anyone use String.Format in C# and VB .NET as opposed to the concatenation operators (& in VB, and + in C#)?What is the main difference? Why are everyone so interested in using String.Format? I am very curious.
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