Use (if Not Ispostback) - Last Note With ("EnableViewStateMac="false") It Make Ispostback True All The Time?
Nov 5, 2009
i'm working with crystal report and i use (if not ispostback) to set X and in else to retrieve X . the problem is its working properly in some pages and not working in others.this code sample.
If Not Page.IsPostBack Then
Session("VehicleStatusSelectionFormula") = SelectionFormula
Else[code]....
the problem like i said in last note with ("EnableViewStateMac="false") it make ispostback true all the time.
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Feb 10, 2012
Am using asp.net for above 5 years. But now am facing a weird problem. When i try to send emails from form created by me which contains asp:button, asp:textbox, etc., in code page it always telling IsPostBack false. Even when i click the Send mail button(asp.net button). I cant understand what is problem.
Is it anything needed in web.config file for postback??[URL]... Am sure its not problem in Test page.Because it is very normal page which have only one button & code in vb. Problem somewhere in cache, urlrewrite or web.config. But i cant understand where?
[Code]...
When i exclude that dlls and remove the httpmodule line from web.config file postback working fine. So this is error. They done something wrong in their Dll files or httpmodule.
But still can't understand what is error. Is it have chance to control postback action from dll files?
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May 11, 2011
What is this keyword how can use it?If Page.IsPostBack = False Then
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Jun 10, 2010
I know that the web's full of Q's and A's about how to use IsPostBack when selecting the value of a listbox.I have a stored procedure that returns a few values, and I want in runtime to have all the values be selected in the listbox.But when I loop through the SqlDataReader and do: listbox. Selected Value = reader(0), the final result on the browser is that only the last value gets selected.The listbox's SelectionMode is "Multiple".
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Dec 18, 2009
I need to be able to tell from within a VB.NET class (not a user control) whether or not the current request is a PostBack and/or CallBack (AJAX). In the past I've been able to get information about the request, response, session, etc through HttpContext.Current but I haven't been able to find the Page object in HttpContext.Current.
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May 2, 2012
I'm having trouble porting some .NET2-era C# to .NET2-era VB.NET. Specifically, I am trying to define an interface that an ASP.NET user control will implement.(For background, I am trying to re-implement Phil Haack's Model-View-Presenter example from several years ago: http://haacked.com/archive/2006/08/09/ASP.NETSupervisingControllerModelViewPresenterFromSchematicToUnitTestsToCode.aspx)
The C# interface I'm working from defines properties and events (IsPostBack, Load) that are already implemented by the base control.However, VB.NET is forcing me to explicitly implement these properties/events in the user control (Public Property IsPostBack() As Boolean Implements IView.IsPostBack...). I'd like to just define these in the interface and not have to do anything special in the code-behind of the implementing user control.I'm assuming that I can do this in VB.NET, I just don't know how. I've spent all sorts of time googling/bing-ing, and haven't come up with the answer.
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Jul 15, 2011
I have 2 dropdownlists "countries" and "cities", with 2 datasources: If a user chooses the first index in the ddl countries, he can see all the cities in the world in the ddl cities (uses datasource1).If a user chooses a country, he can see the cities correspond to this country chosen (uses datasource2).I put the code for changing datasource in the code behind using vb.net, in Page_Load, but after the user chose a city, and click the submit button, the dropdownlist cities can't keep the status, it goes to the first index of this ddl.
I tried to put this code in the If Not IdPostBack, but like this, it doesn't change datasource while it can keep status of the dropdownlist.I put the code here as reference:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim ddlCities As DropDownList
Dim ddlCountries As DropDownList
[code]....
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Jul 22, 2010
I am trying to build a form that will present one question at a time with true false buttons. It will tell the user how many questions they got right at the end of the quiz. how to i present one question at a time ?? since one button handles only one event.
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Oct 17, 2009
I have made a own namespace, with some classes and subs. One sub looks like this:
ffmpeg.SetEnc.x264
And there it does something. How can I make a sub which I can set as True/False, like this:
ffmpeg.Extras.Overwrite = False/True
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Jun 4, 2011
I have created an Unbound DataGridView. It has has 4 Columns Name, Last Name, Picture, CheckBox. I would like to do change the checkbox's enabled state true or false (editable or not) at the time I add the row
Not its checked state :) and would also like to change image that is placed in the Image column cell during the add row.
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Jan 22, 2011
I have to make a multiple choice and true or false quiz in VB. So i am thinking of two questions on one form.BUt i have to make the questions appear in random and not in order and make sure they dont repeat.Btw, i have searched a long time for this. I have found out how to make random numbers. But I have to make sure only 10 come and not repeated.
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Jun 28, 2010
I have placed several PictureBox Images of different colored dots(which represent lights) on an image of a Christmas Tree. I can make the lights randomly flash using a randomGenerator and a Select case statement. However, the code is very long. There are 67 lights on this tree and the code is 71 pages long. There has to be an easier way to do this. So far I have tried the following with two images of lights just to see if it would work and it does not work:
Dim picLight(2) As
Boolean
For intX
[code]....
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Jul 15, 2010
I wanted to create my own type that acts like the Boolean type, except I wanted to use Yes and No instead of True and False.I kind of got close but it wasnt exactly what i was going for here's what i have:
[code]...
so i have to use an integer when i dim it like:dim b as MyBool = 1 then when you look at it in the watch window b = {Yes} so i could settle for that, but with a boolean you can do this:dim b as Boolean without setting it to anything it defaults to False mine however, is Nothing. 2 things: 1. How can i get mine to default to No 2. How can i make it work like this: dim b as MyBool = Yes instead of having to use the integer this is not a requirement for anything I just wanted to know how to do it
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Feb 20, 2011
The expression 3>6 AndAlso 7>4 evaluates to
A. True B. False
The expression 4>6 OrElse 10<2*6 evaluates to
A. True B. False
The expression 7>=3+4 OrElse 6<4 AndAlso 2<5 evaluates to
A. True B. False
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Jan 18, 2010
I'm pretty new to Vb so I'm not sure of all the correct terminology etc.
Private Sub Add_mousedown(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Add.MouseDown
Dim Addition As Boolean
[code].....
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Sep 18, 2010
I am writing the code in the class to create the strings. I want the value to returns as true if the strings in the class are matched with two numbers or more, but if the if the strings in the class are not matched with first two numbers or not then returns the value as false.[code]....
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Nov 9, 2009
I have a group box set as false but when I click on radiobutton3 i want it to show at the bottom:
if radiobuttion3.checked the
radiobutton4.enabled = true
end if
but this doesn't show up my second group box when the program is running.
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Nov 9, 2009
I have a Group Box Set as false but when i click one Button I want it to Show as True so i have [code] But is not Showing up when i run the program, is this the right code?
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Dec 4, 2010
Simple question, I have an application and dependant on whether you are in the administration system or on the public website I want to show different results. Example: in the database for a news story in the administration I may set the column value 'showonsite' to false. So I would like this to show in the administration panel only and not on the live site.
My question is, because I require the same information just with the only one column change, live site to only show true values and administration to show both. What is the most effective way of achieving this without copy paste of code?
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Jun 9, 2009
In C# and Vb.net,is any way without iterating by loop a bitarray to check contins any true or false value (Dotnet 2.0) ?
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Aug 4, 2011
I'm trying to check if a bit retrieved from database is true or false but i have always the error IndexOutOfRangeException no matter how i get the value.
[Code]...
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Oct 10, 2009
I am trying to get true false statements to work. Each statement has its own msgbox and if true adds 1 to x. At the end i use a case function which will give the final number of x and give it a value in a textbox. What is happening instead is, if I click "no" on every Yes/No question, I get a 4. If I click "yes" on every Yes/No, I still get a 4. For car 3, 4, and 6 I want a "no" to be true. For 1,2,5,7 I want yes to be true.
HTML Code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClick.Click
Dim x As Integer
[Code]......
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Mar 10, 2010
i am having problem with the intellisense. i have created a boolean variable and when i try to assign value why does is shows all the members instead of false and true. Again when i try to set the height the intellisense pops up again.
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Oct 15, 2011
I am new to programming.I am making a coin tossing program for class.It is telling me I need to create a separate method that doesn't take any arguments and only returns false for tails and true heads.Not sure if a function or a sub returns only that type of data. Also once the code is returned I can then add that to a CONST to keep a running total.If the method only returns true or false do I need to put the code in buttonclick sub to post the image of the coin in the picturebox using a if then statement? Would I also need to add the code for the print out of the statistics after the if then statement? Not asking for code just a step in the right direction.
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Jul 21, 2011
Here the code to load the records in data grid when form loads
01
Private Sub BindData()
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Feb 8, 2010
I have tried and successfully ran the code in this thread.>>I have just been thinking about an extension method for a STRING so you couldtypesomeStringHere.IsInMicrosoftWordDictionaryand it would return TRUE or FALSEwith an overloaded version where you could optionally specify the language.Is it possibly to query the dictionary in MS Word in such a fashion? If so, how please?This may lead to me creating a word based game, it is not hangman but a word search game,ut with a twist on word search puzzles. I'm not going to give the idea away.This is what I have so far. The MODULE code for the extensions.>>
Option Strict On
Imports System.Runtime.CompilerServices
Module MyExtensions
[code].....
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Sep 12, 2011
Can I validate a texbox to have only True or false? You should enter True or false in the textbox.
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Feb 17, 2010
Sub pageload() Handles Me.Load
Dim bom As New List(Of Car)
Dim car1 As New Car With {.Name = "Pea", .Year = 2}[cod
WHY??? I mean the object has the exactly same data, so why does itee]..... say it is not contained?
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Jan 21, 2011
How come both intellisense and compiler accepts If 3 = True Then ... in VB.NET? Even with option strict on.Does it in actuality treat Booleans as Integers, or what's the deal?
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Jan 10, 2011
I have a bit of code that goes like this. [code] The problem is the MyInclusion = "Aspire Inclusions Pack" and the TblPackages. Rows(n). Item("fldPromotion1") also = "Aspire Inclusions Pack" BUT the CheckTrueOrFalse is FALSE. I need it to return a TRUE value for CheckTrueOrFalse.
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