.net - Cast String To TimeSpan?
Dec 9, 2009
I tried to parse string to TimeSpan like the following :
Dim dt As DateTime = DateTime.Now
Dim timeCheckin As String = Format(dt, "HH:MM:FF")
ts = TimeSpan.Parse(timeCheckin)
It threw error like this:
System.OverflowException: The TimeSpan could not be parsed because at least one of the hours, minutes, or seconds components is outside its valid range.
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Aug 23, 2010
I tried to parse string to TimeSpan like the following :
Dim dt As DateTime = DateTime.Now
Dim timeCheckin As String = Format(dt, "HH:MM:FF")
ts = TimeSpan.Parse(timeCheckin
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Dec 9, 2009
These two TimeSpan are stored in the Database with 24hr format. No date, only TimeSpan.
Dim r As TimeSpan
Dim tsStart As TimeSpan
Dim tsEnd As TimeSpan
[Code]...
Is there any TimeSpan method to get this right?
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Apr 20, 2009
I am having an error from the date I retrieved based on my query.txtArrivalTime.Text = rdDate.Item("arrivaltime")Using the code, I got this error...Conversion from type 'TimeSpan' to type 'String' is not valid.But when I execure my query on my DB GUI, I got this value 17:25:43.Is there a way I can handle this?
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Jul 14, 2010
I need to convert a string such as "01h45m" into a TimeSpan. I know I can split the string apart to get the numbers, just looking for something more elegant...
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Feb 2, 2012
Working on a personal project.Originally had the file loaded had the program read a number and had trouble converting that number of total seconds into a TimeSpan.Finally got it working with a simple code, after COUNTLESS tried of different code.[code]Now I'm stuck converting that Timespan (in the DD:HH:MM:SS format) back to a integer of total seconds.Tried a bunch of codes I could think of but it was time that I had a fresh idea from other people.
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Feb 9, 2012
Private
Sub cmdExit_Click(ByVal
sender As System.Object,
ByVal e
[code]....
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Apr 26, 2010
I have a requirement that regardless of the start and dates that I need to loop through that timespan and calculate figures at the month level. I cannot seem to figure it out, and maybe it is not possible, but I would like to do something like:
FOREACH Month As TimeSpan in ContractRange.Months
Do Calculations (Month.Start, Month.End)
NEXT
Is this possible or do I need to calculate the number of months, and just iterate through the amount of months and calculate the start/end of that month based on my index?
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Nov 28, 2009
I have the following code and I'm getting tons of Invalid cast Execptions This is for VB 2008 Case Study Auto Center ( Car Wash)
Imports System Imports System.Drawing Public Class frmMain
[Code]...
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Dec 8, 2010
HI, using vs2008 and building a web app. On a asp page called blackjack.aspx, I have four labels with id of lbBJTStatusP1 lbBJTStatusP2 lbBJTStatusP3 lbBJTStatusP4.
I want to address those labels in a single sub by casting the casting two strings into the control name, so that string lbBJTStatusP & "1" would refer to lbBJTStatusP1.This is done on the code behind page.
So far I have tried this but with no success. boxct refers to either "1" "2" "3" or "4".[code]...
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Nov 15, 2011
I want to cast a String into a Cookie and add it into a cookiecontainer. For example if I had Dim cookieString As String = "variable1=hello&variable2=goodbye" Dim myCookieContainer As CookieContainer myCookieContainer.Add(cookieString.Parse(Cookie)) Something along those lines.
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Apr 22, 2011
I have a text file with names that have spaces and commas. For some reason when I read the file it gives me this error. Code is below. Also, I am reading the file into a combobox.
[Code]...
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Nov 5, 2010
I'm getting this error
Unable to cast object of type 'System.Int32' to type 'System.String'.
when doing a routine LINQ to SQL query:
Return (
From n In DbContext.Newsletters
Where n.NewsletterID = NewsletterID
[Code]....
How is it possible that an Int32 can't be cast to String? How can I debug something this? Since it all happens deep in the bowels of LINQ, I can't even get any indication what field this is angry about.
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Nov 11, 2011
I want to get the cookie using Live HttpHeaders and then copy and paste it (as a String) into a textbox where my program will use that cookie to navigate through pages. Here is what I have at the moment:
Dim myCookie As CookieContainer
Dim cookieString As String = TextBox1.Text
myCookie.Add(cookieString.Cast(Of Cookie))
This is just a silly attempt I just want to ensure anyone capable of helping understands what I wish to do.
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May 23, 2009
I'm struggling with enums
Private Enum sizeMode
AutoSize = 2
CenterImage = 3
Normal = 0
[CODE]...
Here i'm trying to cast a string to a pictureboxsizemode: PictureBox1.SizeMode = DirectCast(DirectCast(fields(4), sizeMode), PictureBoxSizeMode)
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Jan 23, 2011
Dim NSNSRC As String = WebBrowser1.DocumentText
This throws me an error although DocumentText does have a value, I have also tried a .tostring after and it still did not work.
Surrounding Code:
While DocCompleated = False
System.Threading.Thread.Sleep(0)
End While
[Code].....
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Nov 29, 2010
I am currently going through a book on beginning VB,NET and am trying to complete one of the exercises in the book. I have created a function that validates user entries to check that they are numeric and within certain a range.If text value is entered into the textbox I get an exception error saying that
"Cast from String to type double is not valid"
[code]...
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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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Nov 3, 2009
Is there a better way of testing if a string can be converted to an integer other than something like the following?
Public Function IsInt(ByVal value As Object) As Boolean
Try
Dim temp As Integer = CInt(value)
[code].....
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Dec 8, 2010
I'm using the filter method of Binding source in VB.net to filter results in a DataGridView based on the text in a search box. However, the idea of this search, is that it shows a row if any of the cells contain the text. So my filter string ends up looking like this:
[Code]...
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Apr 27, 2010
I get an Invalid Cast Exception - Conversion from string to double not allowed. I don't know what to do.
Option
Strict
On[code]......
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Jun 3, 2009
I read somewhere that older VB .net (pre VB .NET 2005?) couldn't use overloaded operators in a C# class. Is it true for overloaded cast operators?Either way do you guys think it's a disadvantage for a C# class library not to include them and arithmetic methods as actual methods for other languages, like:
ToDouble
ToFloat
FromDouble
Add
[code]....
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Apr 20, 2010
Function runs fine on the listbox until i use the btnUp_Lanemgr click event
throws an exception in function (below in bold) "Unable to cast object of type system.string to type namespace.myitem"
what i can do to make this work?
'Button moves selected listbox item up
Private Sub btnUp_Lanemgr_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUp_Lanemgr.Click
[Code]....
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May 13, 2009
I am getting the following erro message: "Unable to cast object of type 'System.String' to type 'System.Predicate`1[System.String]'." on the line of code: If Not StrgFrag.Exists(wrd) Then I was expecting a True/False response and assumed it would work given that wrd is a String variables and StrgFrag in a List(of String). Do I need to reference the wrd variable differently? Dim StrgFrag As New List(Of String)
[Code]....
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Apr 19, 2010
I had write code (just for learning), the codes :
dim Temp as string
Temp = Recordset("
Table_Field")
but, when I start Debugging the error messages "Unable to cast object of type 'ADODB.InternalField' to type 'System.String"
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Mar 19, 2009
I'm new to VB 2005, the code below is actualy coded from VB 6 and just converted it to VB 2005. I'm having trouble with line that's on bold letters.In VB 6 this works just ok. By the way the error message is "Unable to cast object of type 'System.String' to type 'ADODB.Connection'." [code]
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Apr 28, 2010
VB 2003 Combobox collection from -3 to +3 The goal of the message is to warn the user that the systems only covers +- 3 timezones, if he types in for example +4 or -4, he gets the message (by the way: how to protect the system if he types for instance a character?)
When I run the application: 'Unhandled exception: Cast from string "click" to type 'integer' is not valid
Private Sub ComboBox1_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.TextChanged
[Code]...
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Apr 28, 2010
Combobox collection from -3 to +3 The goal of the message is to warn the user that the systems only covers +- 3 timezones, if he types in for example +4 or -4, he gets the message (by the way: how to protect the system if he types for instance a character?)
When I run the application: 'Unhandled exception: Cast from string "click" to type 'integer' is not valid
Private
Sub ComboBox1_TextChanged(ByVal
sender As
Object,
ByVal e
As System.EventArgs)
[Code]...
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Feb 23, 2009
I want to cast a system.string to system.windows.forms.form
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Sep 29, 2011
I am getting this error Cast from string "" to type 'Double' is not valid.Here is my coding:
Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click
Dim intSqft As Integer
intSqft = Val(txtl1.Text) * txtw1.Text
[Code]...
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