Manipulating Object Properties As A Variable With Code
Nov 4, 2010I would like to use a loop to manipulate a set of objects on the form. This is like using a control array but not,... Here is some code to consider:
[Code]....
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Access Properties Of EventSender Object Variable
Jan 6, 2012I have the following code from a textbox leave event:
Private Sub txtdebt_Leave(ByVal eventSender As System.Object, ByVal eventArgs As System.EventArgs) Handles txtdebt_0.Leave, txtdebt_1.Leave
Dim txtbxName As String = eventSender
CType(eventSender, TextBox).BackColor = System.Drawing.Color.White
search_index = Val(VB.Right(txtbxName, 1))
End Sub
I would like to assign the name of the textbox to the variable txtbxName.
I know it's within eventSender as I've seen it when drilling down but how do i get it out??
Code Generation ... Object Variable Or With Block Variable Not Set?
Apr 25, 2012I'm having trouble tracking down what is wrong and causing the above error. This only occurs when saving the design view in VS 2012. The code builds and runs fine.Full error text:Code generation for property 'CompanyValue' failed. Error was: 'Property accessor 'CompanyValue' on object 'ContactViewUC1' threw the following exception: 'Object variable or With block variable not set."
CompanyValue definition in ContactViewUC:
Public Property CompanyValue
Get
[code].....
C# - Initialize Object Properties In One Line Of Code
Nov 11, 2009I'll put some C# code below that should explain what I'm trying to do. I just don't know how to do it in VB. Additionally, for future ref, if you could tell me what this process is called
// Here is a simple class
public class FullName
{
[Code]....
Manipulating Bitmap Object Pixels
Feb 13, 2012i mostly use C and assembly, but i thought i would give VB.NET a shot. i used to use VB6 all the time, so wanted to see how different this is. in VB2010, i'm trying to modify the pixels of a Bitmap object and then make it show up in a PictureBox on the form. i get no errors, but this code does not show the new bitmap after it runs.."disp" is the name of the PictureBox on the form.[code]
View 1 RepliesSql - How To Fix "Object Variable Or With Block Variable Not Set" In This Code
Jan 31, 2012Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
conn.Open()
cmd.Connection = conn
cmd.CommandText = "Select RoomName from Room_Details"
[code]....
I try this code but it throws the following error:
Object variable or with block variable not set
Flattening An Object Hierarchy Using A Shim Class - Initializing Derived Object Properties From The Base Object?
Jul 10, 2010I am somewhat new to object oriented programming and am attempting to flatten a Linq object hierarchy by using a shim class.how to initalize a derived class with property values from a base class?I have two objects, a base object with about 100 properties, and a derived object which inherits from the base object and adds a few additional properties beyond those of the base object. My simple constructor creates the derived object, but I am looking for a way to initialize the derived object properties with values from the base object.Right now I am using reflection to iterate over the properties individually and I suspect there may be a better way. The following example shows my shim class constructor for the derived class, and two properties:
newProperty1 - a new string property of the derived class
flattenedProperty2 - a new string property of the derived class, copied from a 2nd-level object of the base class
Code example:
Public Class derivedObj
Inherits baseObj
Private _newProperty1 As String[code].......
Is this the correct constructor approach to flatten the object hierarchy using a shim class? My second question relates to initialization of properties in the derived class. The constructor above creates the derived object, but what is the best way to initialize the derived object properties with values from the base object? The following code uses reflection to iterate over the properties individually, but I suspect there may be a better way.
Code example:
' property names are in the string array fieldNames
'baseObjQuery is an ienumerable of baseObj
'derivedObjList is a list of derivedObj[code].....
Is there a simple way to initialize values for the properties in the derived object based upon the values of the common properties in the base object?
VS 2008 Manipulating Objects Through Code?
Mar 25, 2010How can I create and manipulate Objects on form with my vb code?By that i don't mean toggling the visibility.
View 6 RepliesReference A Report Variable In The Report Properties Code Window Of A Local Report?
Apr 19, 2011how I can reference a report variable in the Report Properties Code Window of a local report? I have tried Variables!Claimant.Value (for a variable called Claimant) but I get an error "Reference to a non-shared member requires an object reference." I have tried qualifying it with Report. and also with the report name in front of it but I get errors with this also.I have the variable CLaimant defined in the Variables section of the Report Properties.
View 3 RepliesMake Custom Properties In Properties Window To Refresh Upon Change Via Code?
Apr 26, 2012[code]I want to make the Properties Window to update the properties for X and Y at each MouseMove, so they become immediately visible for the user.
View 2 RepliesSet The Transparent Property Via Label Properties Properties Not Via Code?
Jan 16, 2009I'm working on a Hazardous Materials label printing program. One of the options is to do an "NFPA" label. Since there are 4 values required with 4 or 6 options, the ratings are entered via radio buttons in a group box. That's working okay. I display values in the NFPA diamond as they're entered: left quadrant blue, top quadrant red, left yellow, bottom red. I'm having trouble with the label in which the rating will be displayed on top of a jpg diamond for the white. In this quadrant the text can be up to 4 characters. I can accept the text going into an adjacent block a little, but the corners of the label overlap into another quadrant/color. I reduced the font size which solved the overlap problem but the font is then too small and looks terrible. I tried to make the background of the label transparent to let the color come through correctly but that's not a valid value for label.background. I'm figuring that the transparent background is the best solution. What can I use that will accept a transparent background so the color shows through?
I'm trying to set the transparent property via label properties properties, not via code. Here's the code if it makes any difference:
Public Class NFPA
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Close()
End Sub
[code]....
Asp.net Mvc - Dynamic Object Properties In A MVC Helper On Entity Framework Object
Jul 20, 2009I want to build a MVC helper function for which I pass a Entity Framework object and have it build a select. Generally speaking I tried something like this:
Public Function RenderSelect(ByVal helper As HtmlHelper, ByVal sSelectName As String, ByVal aItmes As Array, Optional ByVal sTitleKeyName As String = "name", Optional ByVal sValueKeyName As String = "id") As String
' open select
[Code].....
However, it isn't working. It would be great to have a way to do this and pass the current entity object.
Dynamic Object Properties In A MVC Helper On A Entity Framework Object?
Oct 26, 2010Dynamic Object Properties in a MVC Helper on a Entity Framework object
View 1 RepliesIterate Through Class / Object Properties - Saving Them Each To Another Object
Dec 15, 2011I'd like to have something like:
[Code]...
Import Text File : Object Variable Or With Block Variable Not Set
Mar 28, 2011i have this error in the line of with xl.active......Object variable or With block variable not set.
Dim xl As Object
xl = CreateObject("Excel.Application")
With xl.ActiveSheet.QueryTables.Add(Connection:= _
"TEXT;C:Documents and SettingsUserDesktop429MEDICA2.TXT", _ Destination:=xl.Range("$A$1"))
[code]....
Object Variable Or With Block Variable Not Set - From Property Get With Bindingsource.current?
May 31, 2012Now I have the need to get a current value from a bindingsource in a property of a user control.In a previous thread I had tracked down the "Object variable or With block variable not set" to the return in the Get block of a property. At the time I was only using the Set so I just commented out the offending code until I needed it.
[Code]...
The error does not occur during a system compile, only upon saving the container object of the user control. As I said the Set works correctly, only the Get causes the error.I would like to know what I am missing/misunderstanding and am open to other suggestions of handling retrieving the current value of a bindingsource in a user control.
Class Inheritance Object Variable Or With Block Variable Not Set?
Sep 26, 2011i had a class called Tag with a structure like:
public class Tag
private _members
public properties
public shared database_methods
end class
this class was tailored for mysql database. i'm currently adding access 2007 support so i split tag into tag and tagdata with structures like:
[Code]...
Communications :: Object Variable Or With Block Variable Not Set Error
Jul 24, 2008Been getting this error with my program. Using framework 2.0
[Code]...
DB/Reporting :: Object Variable Or Withblock Variable Not Set Error
Jan 21, 2010I'm trying to enter automatically todays date in a number of records in the Table 'Applications' into the field 'Date_refund_request'.
However it is giving me the error 'object variable or withblock variable not set' in the line "Set rs = db.OpenRecordset(strSQL, dbOpenDynaset)".
The code is as follows:
Private Sub Command16_Click()
On Error GoTo Err_Command16_Click
Dim db As DAO.Database
[Code].....
Outlook Attachment: Object Variable Or With Block Variable Not Set?
May 6, 2009I am trying to use this block of code to save attachemnts from Outlook into a folder on my harddrive.
VB
Imports Microsoft.Office.Interop
''' <summary>
[code].....
Asp.net - Checking For A Session Variable... Returns (Object Reference Not Set To An Instance Of An Object)
Jan 12, 2011In the Session_Start of the Global.asax i have
Sub Session_Start(ByVal sender As Object, ByVal e As EventArgs)
Session("login") = False
[code]....
Why i am getting error the error Object reference not set to an instance of an object. at line
If Current.Session("login") Is Nothing Then
while checking for the login state as follows?
If GetLogin = False Then
'Do something
End if
I mean i have already created the instance on the Session_Start... Haven't i?
Asp.net - Object Variable Or With Block Variable Not Set Error?
Dec 8, 2011I'm writing in ASP.NET 4 / VB.NET. I am querying an MSSQL database and sometimes have records come back with no results...so I enclosed the call I was making upon the results in an If..Else clause to set a default value if the database comes back with no results...but now I am getting this "Object variable or With block variable not set error". Here is the relevant code:
Dim clcfirst
Dim rhcfirst
Dim clcdate As Date
Code].....
Object Variable Or With Block Variable Not Set Error
Aug 21, 2010I am populating combo box from database. In debug i can see that the combo box has been populated . here is the code
[Code]...
Instantiate Object From Class Using String Variable For Name Of New Object?
Aug 11, 2009dim myCollection as new Specialized.StringCollection
dim myFoundThings as new ArrayList
dim index as Integer
dim newResultMemberName as String
[code]....
This is part of some code that will run without user interaction once it's spinning away, and I need to create a unique object from some items found in a StringCollection, naming the objects using information found in the strings stored in that StringCollection.
Using Properties (rather Than A Public Variable)
Jan 19, 2010Is there any point in using a property (rather than a public variable) if it just says:
[Code]...
Get A Class Properties Underlining Variable?
Jan 5, 2010Is it possible to get a Class properties underlining variable.because GeValue / SetValue need and object to work with.
View 4 RepliesUse CType To Change An Object Variable "obj" To Custom Class That Reference Using A String Variable Like Obj.GetType.Name?
Feb 9, 2011The code below works for the class that I hard coded "XCCustomers" in my RetrieveIDandName method where I use CType. However, I would like to be able to pass in various classes and property names to get the integer and string LIST returned. For example, in my code below, I would like to also pass in "XCEmployees" to my RetrieveIDandName method. I feel so close... I was hoping someone knew how to use CType where I can pass in the class name as a string variable.
Note, all the other examples I have seen and tried fail because we are using Option Strict On which disallows late binding. That is why I need to use CType.I also studied the "Activator.CreateInstance" code examples to try to get the class reference instance by string name but I was unable to get CType to work with that.When I use obj.GetType.Name or obj.GetType.FullName in place of the "XCCustomers" in CType(obj, XCCustomers)(i)I get the error "Type 'obj.GetType.Name' is not defined" or "Type 'obj.GetType.FullName' is not defined"
'+++++++++++++++++++++++++++++++
Imports DataLaasXC.Business
Imports DataLaasXC.Utilities
[code]....
Creating New Instances Of Form1 With Variable Properties
May 13, 2009I'm trying to elaberate on some basic examples of .Net programming in using VB. The basic example of creating a new instance of Form1 is:
Dim x as New Form1
x.Show
I've added some OptionButtons to set the StartPosition of the Next Instance of Form1 as well as some Labels that display the Top, Left, Width and Height properties when the new instance of Form1 is Shown.
This is the code I'm using.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim x As New Form1
If Me.RadioButton1.Checked = True Then
x.Top = 0
x.Left = 0
[Code] ......
Declaring Private Variable - Automate Properties?
Sep 28, 2009I come from C# (use VS 2005, .NET 2) and I know that when I declare a private variable I can "extract" from it the corresponding "property". In VB.NET I've declared a lot of properties (in the diagram class designer). Now am I forced manually adding the corresponding private fields?
View 4 RepliesOne Reference A Control As Variable And Change It’s Properties?
Mar 14, 2009In vb.net 2005 how would one referance a control as variable and change it"s properties. Such as in control X visible = True. Tryed string manipulations that did't work.
View 1 Replies