Can A Control Be Used As The Switch Variable In A Select
Mar 27, 2012
I'm working on a function that handles events from a number of buttons and trying to define a Select...Case based on the clicked button. Something like this...
Private Sub btnClick(ByVal sender As System.Object, ByVal e As System.EventArgs) _
Handles btnThis.Click, _
btnThat.Click, _
[Code]....
which don't work either. Is there any way I can define a Select...Case in this manner or is it always destined to fail due to the attempt at comparison of reference types?
View 3 Replies
ADVERTISEMENT
Oct 18, 2011
Say I have this in VB.NET:
Dim executeB As Boolean
Select Case myVariable
Case "a"
'some code
Case "b"
'some code
Case Else
End Select
If myVariable is "a", control will go into the first case statement. Now let's say if myVariable = "a", but inside a's case block, I find that executeB is true, is it then possible to jump to the second case?
View 5 Replies
Aug 19, 2009
[code]How would I switch on an object's type but using VB.NET's Select Case?I'm aware that some might suggest using polymorphism but I'm using a hierarchy of small message classes so that really wouldn't work in my csae.
View 6 Replies
Sep 14, 2009
working with: ASP.net using VB.net connecting to MS SQL Server
What I'm trying to do is take the result of a SQL select query and place that in a string variable so it can be used in things like a textbox or label. code so far that doesn't work...
Imports System.Data.SqlClient
Partial Class dev_Default
Inherits System.Web.UI.Page
Protected Sub form1_Load(ByVal sender As Object, ByVal e As System.EventArgs)
[Code].....
View 3 Replies
Nov 6, 2011
I have a case where my enumeration is like this:
Public Const PREVIEWCREATE As Integer = -3
Public Const SETUP As Integer = -2
Public Const PREVIEW As Integer = -1
I then have a form post where i recover a string like:
Dim mode_custom_mode = request.Form("custom_mode")
I can do
Select Case UCase(mode_custom_mode)
Case "PREVIEWCREATE"
[Code].....
is there a more direct way in VB to do something like:
t.StartupModeId = StartupMode.(mode_custom_mode) ?????
View 2 Replies
Apr 8, 2011
I am having an issue with the following code. It works when the data is all numeric such as 9200000 but not when the data is alpah numeric such as b101462 I am collecting data from a textbox into a string variable findacct and then using the variable in the sql statement. The data in the access database is char type.
The following select statement works when all the data is numeric for the find acct varialbe but if start with a alpha char like B101462 it gives me a missing parameter error."Select * From purchase where issuedate >= " & "#" & finddate & "#" & "and account like " & findacct)The following statement works when I actually put the account info in the select statement and do not use a variable."Select * From purchase where issuedate >= " & "#" & finddate & "#" & "and account like 'b101462'")
View 4 Replies
Apr 16, 2009
I want to select a table on my database but I have the name of the table on a variable.Because I will create tables periodically I have don't know the name of the future tables so I will stored on a variable. The problem is how I call the variable on SQL statment. I made a code using the addwithvalue to use the variable on the SQL but didn't work. Here is my code
Dim tablename As String
tablename = InputBox("Enter the table name")
Dim myconecction As String
[code].....
View 3 Replies
Aug 16, 2011
I have a simple vb script which extracts some data from our accounting software to a text file. It works fine when I do not use a variable in my select statment as follows:
xselect = "SELECT SourceJournal,JournalRegisterNo, PostingDate, PostingComment,UserCreatedKey
FROM GL_DetailPosting
[Code].....
View 4 Replies
Mar 30, 2009
How do I fill the variable in my SELECT statement?
Private Sub TabPage2_Enter(ByVal sender As Object, ByVal e As System.EventArgs) Handles TabPage2.Enter
strTenantPin = tbxTenInfo_Pin.Text
[Code].....
View 4 Replies
Aug 14, 2009
I have several instances of one form loaded. They all have an instantiated variable "Name." How do I select one of these forms based on the name variable?
Code:
Public Sub MakeForms()
Dim x as New frmBlack(me)
x.show
End Sub
View 3 Replies
Jun 11, 2011
I am using VS 2010, SQL 2008 express and doing windows applicaion programming in vb.net.I want to write a select query(or Stored Procedure) such that the conditions mentioned under WHERE clause can be variable .like :Select * from TABLE where F1 = var1 and F2 = var2 and F3 = var3.Now on the basis of some conditons the equations in where clause should beused.Say condition is variable value >6.Now in this case ,if
var1 =7 var2 =3 var3 = 8 then the query shud behave like
:
select * from TABLE where F1 = var1 and F3 = var3
[code].....
View 1 Replies
Apr 1, 2011
I'm trying to retrieve values using vb.net from a sql database. How do I use "SqlDataSource.Select()"? Is there a way to move the value to a variable that I can use for other things? I know its kind of scattered and vague but that is the best I can do. I basically need to set a labels text to a value in a table.
View 2 Replies
Apr 29, 2009
I've been working on a Stored Procedure that checks the time, then retrieves records going back over the last full 24 hour period between 8am and the previous 8am. So, for instance, assume that it's currently 10am. The stored procedure looks at the current time, notes that it is past 8am, and sets the query to run backwards 24 hours, from 8am today to 8a yesterday. If it were, say, 7am, the query would be set to check from 8am yesterday to 8am the day before. This was actually relatively simple to do. The SP is meant to be used to retrieve records for a report tracking jobs completed in the given time span.
However, they've come back at me and asked me to change the stored procedure such that the hour the report ends at, and the span of time checked, is configurable from the front-end of the site. I have this working for TimeSpans greater or equal to 24 hours, but am having trouble with spans under that. Here's what I have so far for my logic in the Stored Procedure -
-- Retrieves data on jobs that completed/completed with errors during a given time span.
DECLARE @Hour NVARCHAR(2)
DECLARE @TimeFrame NVARCHAR(2)
[Code].....
View 2 Replies
Mar 19, 2012
I have 10 checkboxes on my screen. I have a variable setup called "case" as a string. I want to know how I can say:
If checkbox1 is checked then case would be equal to "this".
If checkbox2 is checked then case would = "that"
Example of something I tried to cook up but didn't work because it tells me that I can't only use this in a "select case".
Dim Case as string
If checkbox1.checked = true
case = test1
end if
If checkbox2.checked = true
[Code] ......
View 5 Replies
Feb 12, 2011
I am using VS2010 windows application , SQL server 2008 express at backend.I am designing a windows form with fields to search records in database.Say there are 3 fields in the form :
1) material no 2) material group 3)creation date the corressponding table in database with above fields is " Material_master" User can search materials in the database by entering any of the above fields.No I want to write a query where if user doesn't enter anything then my query should work like
"select * from materialmaster "
if only material no is enterd at screen then
"select * from materialmaster where MatNo = materialno "
if both date of creation and material no enterd then
" select * from materialmaster where MatNo = materialno and Date = creationdate "
In other words , field with no values in it should not be accounted in the where clause. Only one query I want to write.How we can achieve this in VB.net windows application?
View 4 Replies
Dec 21, 2009
I am trying to retrieve a password from an SQLite database. The id of the row the password is in is 1. I want to assignt his password to a variable called actualpass.[code]
View 1 Replies
Jul 31, 2010
I'm relatively new to VB. I want to perform a SELECT statement that uses a variable to return a value, example;
mysql> SELECT room_description FROM room_descriptions WHERE current_room = 'someVariable';
And display the result in a TextBox i.e. TextBox.text = someVariable.
So how do I perform a query from VB that passes a variable? How do I assign the result to a variable?
View 3 Replies
Nov 20, 2011
I have a listview box. I load the listview up from a text file and everything is divided into three groups. I need to be able to select multiple lines then push that out to a single variable, separated by commas. Two things are happening that are problematic:
1) If I just have it set to smallicons and no checkboxes, anything I select is highlighted right up until the control loses focus at which point everything un-selects.
2) If I turn on checkboxes, I can click boxes and they stay selected when I lose focus BUT the checkboxes are cut off on the left side of the control. (The checkbox appears to go off the edge of the control.) There's plenty of space in the control for the checkbox and the listed items.
View 4 Replies
Jan 3, 2011
I'm using some VB.Net code to manipulate files on my system - the idea is that the code checks if a file exists, and based on a value read from a text file elsewhere the system decides what to do... For this I'm using a 'select... case' statement to decide on the action to take. However, when assigning a value to the variable, the code doesn't even find the option to go for... Here's the VB code:
[Code]...
View 8 Replies
Feb 19, 2011
what I am trying to accomplish worked with the code in the last thread I posted a while back. I still am using this code, however, I changed the window size to work better and gave it a nicer background for the title screen of my project. Now what I am working on at the moment is making a settings form that has 2 labels. One for "Default" Layout and one for "Plain" layout. When default is at start, the default label is disabled,and when plain layout is clicked, the button is disabled and default button is enabled.Basically, this is a toggle switch for default or plain where if one is enabled, the option for it is disabled and the other is enabled.My problem is that when I switch from Plain back to default, the background Image will not switch back from the plain background color of "control"Here is my code:
Public Class Settings
Private Sub LinkLabel1_LinkClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.LinkLabelLinkClickedEventArgs) Handles LinkLabel1.LinkClicked
MiDNiGHT.BackgroundImage = Nothing[code].......
View 6 Replies
Nov 10, 2010
I am trying to write a module that will select cells from multiple, non-contiguous columns within a row that is defined by a variable. The column numbers are known and are unchanging. For example, my worksheet might look like this:
A B C D
Row 1 X X X X
I want to select cells A1, B1, and D1; however, I don't want to use the row number (1 in this case) in my code. Rather, I want the row number to be specified as a variable. The code I am writing is inside a For/Next loop, so I would like to use the iterative variable (i in this case) to define the row number. That way, every iteration of the For loop will select cells from a different row.
View 1 Replies
Jun 20, 2011
I am using OleDb, trying to do this:
Dim d as Date = DateSerial(Year(rptDate), Month(rptDate), 1 - 1)
Dim conn as OleDbConnection = new OleDbConnection(connStr)
Dim cm as OleDbCommand = new OleDbCommand()
[code]....
I know that d is the same date as the one in SQL server, specifically 3/31/2011 12:00:00 AM.
View 4 Replies
Jun 1, 2010
I have read this many times. Focus is a low-level method intended primarily for custom control authors. Instead, application programmers should use the Select method or the ActiveControl property for child controls, or the Activate method for forms. What exactly is the difference? Subnet Calculator / Planner Serial Port
View 12 Replies
Jun 1, 2010
I have problem with listview controls. I need to get some select control, i tryed to find at google but no one didnt work.
1. AxWindowsMediaPlayer3.URL = ListView3.SelectedItem.I need something like that what works
2. and some code what remove selected thing
View 2 Replies
Sep 5, 2010
VS 2010 On Tab Control Select
View 3 Replies
Nov 24, 2009
I'm trying to add a varible to a control, so I can reference the Variable with the Controls name. I would like to set the variable how you would set a regular Integer. [code]...
View 3 Replies
Jan 19, 2011
I have the following code inside my MDI parent form:For Each crl As Control In me.Controlscrl.?????Next
The code mainly used for getting some info from all child forms.I can get all the general property like size, location by crl.size or crl.location. But if all the forms have an own variable like myTxt. How could I get this own variable by this For Each method?
View 2 Replies
Apr 19, 2012
Can a listview multiselect in the same way as a listbox can, when it is set to electionMode = multiSimple?for instance when the listbox is set to selectionMode = multiSimpleyou can just select any number of items in the listbut...with a listview you can only multi-select when you hold down Ctrl. As soon as you lift the Ctrl key and click on an item it de-selects everything and only selects the last one you selected
View 4 Replies
Dec 6, 2010
(In VS 2008) I have a usercontrol that is in the properties list in Design view, but I can not see the actual control, and it creates some error. How can I remove it when I can't select it?
View 2 Replies
Jun 11, 2011
The code below selects all items in a listview control,fine,but I was wondering how I could code to select all but the very last line in the array.[code]
View 5 Replies
