Basic Definition Of "TryParse"?
Oct 6, 2009I used this quite frequently, but could never define its role
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Using Special Tag Codes To Change Word Font Definition In A Textbox For Visual Basic 6?
Nov 20, 2010I am looking for special tag codes that can be used to define certain words in a diffierent font format, like bold, italic, etc. I have a special command that accepts initial tag and end tag to these special words.So, these tags must be interpreted by textbox in VB to turn some words in bold, for instance, and change back to normal font after those words.
The command I have is:
textbox.text = data_base_name.FieldByName("field_name").HighlightedString(index as long, start_tag as string, end_tag as string)
The effect in the textbox should be like this:
Example of special word in bold.Any one knows about the existance of these special tag codes? I wonder if there is something like old DOS Codes, or ANSI, that can be recognized in VB textboxes.
Unable To Use The TryParse
Dec 17, 2009I am trying to check this app. and make sure only numbers are placed into the textbox, but my tryparse isn't working.
Private Sub btnConvertC_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnConvertC.Click
Dim intTemp As Integer 'holds the text input
If Integer.TryParse(txtTemp.Text, intTemp) Then
[code].....
C# - Object Array Tryparse?
Dec 11, 2011I have an array of 5 objects and also 5 textboxes. I am wanting to check to see if the values in the corresponding textbox are valid for the type of object.I have currently hard coded this, I parse out the object type and then use a tryparse statement depending on the object type.
Can I do this automatically? Can I detect the type and use a tryparse statement for that type. Maybe something like:if objectarray(x).tryparse(textbox(x).text, nothing)
C# - Work Around For PrimativeType.TryParse?
Aug 21, 2009I have become accustomed to using TryParse for attempting to parse unknown types:
Dim b As Boolean
Dim qVal As Boolean = If(Boolean.TryParse(Request.QueryString("q").Trim(), b), b, False)
or
bool b;
bool qVal = (Boolean.TryParse(Request.QueryString("q").Trim(), out b) ? b : false;
So, just curious if someone knows a better way of doing this other than using a ternary operator.
public static class PrimitiveType
{
/// This function will return a parsed value of the generic type specified.
/// </summary>
[code]....
Just pass in the type you're expecting as the generic and provide a string value to be parsed and a default value in case the string is not parsable. If you provide a class instead of a primitive type it will throw new ArgumentException("Generic type must be a valid Value Type that has a Parse method.");
Tryparse The Combobox And Use The SelectedIndex?
Nov 3, 2010The adultcombobox & childcombobox have value from 1 to 10, and none.I try put it in Do Loop like the code below, but the total price not come up so well, so I think I am having problem with the Do Loop and the Payment method.One more thing, do I need to Tryparse the combobox and use the selectedIndex ?
[Code]...
Using TryParse Within Select Case?
Nov 8, 2010I am in my programming class and we had a small program to make that would check to see if an value that was entered is a integer and convert it to a Roman numeral. I know how to properly do it by putting the TryParse into the If...Then statement. What I am trying to do is to not use an If...Then statement and go just by a Case Selection statement. If it is not possible then that is cool with me, I am just trying to think outside the box. Here is what i have done with it:
[code]....
When you do say "Case 1" it says it needs to be "Case CBool(1)." Using either "Case CBool(1)" or "Case 1 = 1" provides the same result .However the code shows no errors it doesn't do the conversion, it always displays the label's value as "I"
Using Integer.TryParse For Validation An If Statement
Jan 26, 2012this is for homework but I have 90% of the project done, I just need to finish the data validation portion of the code. This is what I have for the calculate click event:
[Code]...
Using Integer.TryParse For Validation An If Statement?
Feb 12, 2012this is for homework but I have 90% of the project done, I just need to finish the data validation portion of the code.This is what I have for the calculate click event:
Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click
Dim intInputA As Integer
Dim intInputB As Integer
Dim intInputC As Integer
[code]....
My Problem: I am using the Try parse to validate weather the inputA(B)(C) is an integer or not, if it is an integer, i want it to move to the nested if and validate that it is a positive number, and show the error message in the label if it is not. If it is not a number at all i want it to show another message in the label. The problem that I am getting is that even if i put in a letter for the input it does not catch it and it continues on to the select case, which comes out 0.
Why Does Integer.TryParse Set Result To Zero On Failure
Jul 3, 2009My understanding of the Integer.TryParse() function was that it tried to parse an integer from the passed in string and if the parse failed the result integer would remain as it did before.
I have an integer with a default value of -1 which I would like to remain at -1 if the parse fails. However the Integer.TryParse() function on failing to parse is changing this default value to zero.
Dim defaultValue As Integer = -1
Dim parseSuccess As Boolean = Integer.TryParse("", defaultValue)
Debug.Print("defaultValue {0}", defaultValue)
Debug.Print("parseSuccess {0}", parseSuccess)
[Code]....
IsNumeric Vs TryParse - Make Sure The Data Is Valid
Oct 11, 2009On all my assignments I am asked to make sure the data is valid - only numeric, no empty strings. And I keep wondering which is the best to use IsNumeric or TryParse. When I try both on coding they seem to do the same thing, and I don't seem to find my answer online. Any ideas of why to use one over the other.
View 3 RepliesTryParse Used In Function - Convert Celsius To Fahrenheit
Mar 28, 2010I am creating a program that will convert Celsius to Fahrenheit and visa versa. The program must use a function to return the answer. I'm using a string function that will return either the temperature in Celsius or Fahrenheit or "Please enter a valid temperature" if anything but a number is entered. TryParse is used to check if the input is valid.
When using the TryParse method in the function I am trying to use a parameter to pass the variable that will store the converted data type value [Code] The line " If Double.TryParse(tempTextBox.Text, scale) Then " is supposed to check if the conversion is possible and if it is pass either F or C as a variable to the scale parameter. It seems to verify the conversion all right but it doesn't actually do the conversion. Why isn't doing the conversion? Both F and C remain 0. I can get it to work by using two more TryParse methods (one in each branch of the If else statement in the function), but I'd rather not do this.
Using TryParse And Nothing To Fill Date Column With NULL
Dec 7, 2010With a Decimal, I use:
document.Air1 = CDec(IIf(Decimal.TryParse(Air1TextBox.Text, Nothing), Air1TextBox.Text, "0")) to fill the column with there is no value.
I would like to do something similar when the date is blank (preferably with NULL or just plain blank):
document.TestDate1 = CDate(IIf(Date.TryParse(TestDate1TextBox.Text, Nothing), TestDate1TextBox.Text, " - - ")) - of course, this throws an exception.
The table Data Type is date.
VS 2008 : Use The TryParse Method To Check For Letter Text Input?
Nov 9, 2009Is there any way to use the TryParse method to check for letter text input?For example, a user needs to input a name in a text box. Is there anyway to check that input are all letters?
View 4 RepliesVB 2008 TryParse Method - When Enter A Character The Result Is As Though I've Entered An Integer
Mar 10, 2009The code performs correctly when the input is an integer, but when I enter a character, the result is as though I've entered an integer. Can you tell me what's wrong with my TryParse statement?
Private Sub btnCompare_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCompare.Click
' Declare Local Variables
[CODE]...
Code A TryParse To Get The Input From Customer From A Textbox Named Strands And Convert It To A Number?
Oct 21, 2009How would I code a TryParse to get the input from customer from a textbox named Strands and convert it to a number (this number will always be a whole complete number, cannot be 5.6 or 4 1/2 or whatever) then have that Strand number be muliplied by the selected item in my listbox1. This listbox has an access database bound to it with 2 columns Size and Area, the Size equals the Area and I set the Value to the Area column but set the Size to show up in the list box. and the Strands textbox has to muliply by the Size picked, but by the Area # not the Size #. And the results of that multiplication showing up in another textbox named total.
View 14 RepliesDoes Not Contain A Definition For
Jan 18, 2011I'm facing really strange problem, in one of my BLL files whenever I add method or property i get this message Error1'CPLogic.BLL.OrdersFaxGroups' does not contain a definition for 'GetFaxGroupForStatusCheck'C:CouponphoneAppsCPFaxEngineCPFaxEngineCPFaxEngineFaxEngine.cs20658CPFaxEngine I know that the method is in that file, i even able to build the application with success but when ever i try to lanuch it i get this message, the same thing happend to me yesterday in the same file, i ended up deleting it and copy its content again to new file with the same name. but now even that not working..
View 4 RepliesC# - Definition Of Type In .NET?
Dec 14, 2010When you want to define a type you must say GetType(Type) ex.: GetType(string), but ain't String a type itself? Why do you need to use GetType in those situations? And, if the reason is because it is expecting a Type 'Type'... why isn't the conversion implicit... I mean, all the data is there...
View 4 RepliesC# - WPF Definition Of FontSize?
Mar 1, 2010I know that in WPF, FontSize = 1/96 of an inch (same as 1 pixel I think). Is the FontSize dimension the height, the width, or diagonal size of a character? I would guess it's the font height, but the Microsoft documentation doesn't really indicate what it is.
Also, is there an easy way to get the height and width of a font size?So it looks like the FontSize is the height, and the width can only be determined (without knowing the actual character) on monospaced fonts since proportional fonts have varying widths.
Go To Definition With One Click
Feb 28, 2012When I right-click on function name and then press "go to definition" it takes me to the function definition. Is there any way to do this with just one click on function name,., is there some option ,or add-on for VB? that will be perfect, fast and furious
View 2 RepliesGo To Definition With One Click?
Feb 17, 2010I right-click on function name and then press "go to definition" it takes me to the function definition. Is there any way to do this with just one click on function name,., is there some option ,or add-on for VB? that will be perfect, fast and furious
View 1 RepliesVS 2005 Go To Definition Not Available?
Mar 9, 2010I made a copy of a program so I could 'play around' with modifying it. The copy is in a different project in the same solution, plus I renamed it so there shouldn't be a conflict-so why is Go To Definition not available in the copy? It's active in the original (and other programs) but grayed out in the copy. I've rebuilt the entire solution, including the copied program-and it still doesn't work.
View 1 Replies.net - What Does The () Stands For In The Property Definition
Apr 6, 2012I noticed in the code base I have to read that sometimes property definition includes an empty (). What's the meaning of that? And it has nothing to do with arrays.
For example :
Public Property TotalPages() As Integer
Array Structs Definition?
Aug 2, 2011i'm lost on how to do this inline.It's easy to say
Dim X as Integer = new Integer(4) {1,2,3,4}
but i'm lost on:
Structure ThisType
[code]....
How To Use XML Schema Definition Tool
Feb 11, 2011I have an .XSD that is made from a class so that I can pass to a webservice. It got it over to the webservice as an XMLSchema object and now I need to make it into a class so that I can make objects out of it on the webservice side. I know that XSD.exe is the answer but I'll be darned if I can puzzle out exactly how to implement this thing. I need it to do this conversion at run time so I need to put the code for it into my project and all the references I've seen to using XSD.exe talk about calling it from the command line.
My .XSD is below.
<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="[URL]">
<xs:element name="Field">
[Code] .....
In my project this is living in an XMLSchema object. How do I turn it into a class?
.net - Class Definition Properties Or Methods?
Aug 4, 2010I have a class definition that I've seen other define properties that return collections of objects.
Public Property GetAllAdults() as Adults End Property I made the argument that this should be a method in the class, because it doesn't define an attribute of the class, and could not be extended with parameters. Is/Are there reasons why this should be defined as a property vs. a function?
Asp.net Web Service OneWay Definition Not Working?
Apr 22, 2010When I specify <SoapDocumentMethod(OneWay:=True)> on my webservice it doesn't seem to get called. If I remove that the webservice works properly. Also, everything works fine on the development machine just not on the server.
Here is my web method:
<SoapDocumentMethod(OneWay:=True)> _
<WebMethod()> _
Public Sub Write(ByVal processGroupId As Integer)
xslClass.xslHelper.writeDatabase(processGroupId)
End Sub
[code]....
Create Array Of Class Definition?
Oct 9, 2006How do I creat a simple array of class definitions?[code]...
View 13 RepliesError :The Source Of The Report Is Not Definition Has Be Not Specified
Aug 12, 2011i have a probleam with my report , i try to display my report using report viewer but it show an error :The source of the report is not definition has be not specified. i am using visual studio 2005 and databse sql 2005.
View 1 RepliesFirst Parameter In The Definition Of .NET Generics Uses The 'Of' Keywo?
Dec 13, 2011Why only the first parameter in the definition of VB.NET Generics uses the 'Of' keyword ?
For example I have here the the full code that LINQ uses for the Enumerable.Select() method :
<System.Runtime.CompilerServices.Extension()> _
Public Shared Function [Select](Of TSource, TResult)(
ByVal source As IEnumerable(Of TSource),
ByVal selector As Func(Of TSource, TResult)
) As IEnumerable(Of TResult)
[Code]...