Reducing Code Clutter When Using A ListViewItem Object
Aug 27, 2007Reducing Code Clutter When Using A ListItem Object
When using ListItem objects, the normal procedure is as follows:
[Code]......
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Reducing .Net Code Using Inline Object Creation?
Apr 4, 2012I have managed to crunch down a several line code to this
For Each gal In galleries
With New HtmlGenericControl("div")
.ID = gal.Header
[code]....
I cannot find any where how to reference back to the object i am currently working with to add the control back to galleryContent' - Using plain me crashes the whole web server...Using does not offer the shorter hand of just using . - But it Using the only way to do it?
Overwrite Existing ListviewItem Object?
Jan 3, 2010I've got this little problem with my listview Control, I decided I wanted to hide some of my data in each listview item so I inherited from the Listview "DiaryItem".The problem is I'm in this cross threading situation and I cannot seem to overwite one Listviewitem object with another, I'm sure its some sort of refrencing problem as when it goes out of scope(function close) the original data is still present, I know I could add the new data by adding a new ListviewItem and deleting the old one but they must be away around this.
Because of cross threading I could not use Items even though I'm checkign for it. Code:
[Code]...
If Statement Efficiency - Reducing The Code ?
May 27, 2011How would you go about reducing the code for this but still allowing it to work the way it is now
Dim updatelesson As String = cmbChange.SelectedIndex
Dim chosenlesson As String = cmbSession.SelectedIndex
Dim changed As String = lstNames.SelectedItem
[CODE]....
[2008] Reducing The Code Duplication?
Mar 2, 2009Reading through "The Pragmatic Programmer", I've come across the DRY (Don't Repeat Yourself) and Orthagonal (keep code modular) principles.I have a suite of modules, some of which have common procedures. Because each module is a separate project in Visual Studio, up until now I have simply copied code from one project to another when 1 module (project) needs to do the same function as another module (project). This is when functionality overlaps, not when 2 modules (projects) do everything the same.
I always suspected this was bad practice (and have seen the fruits of my suspicions when the subs get out of sync), and the book confirmed me in this belief. So, what I want to do is make a central code repository for the 4 or 5 common subs, but I don't know how to do it.Should I make a .dll file for each sub I want to use in multiple places? If so, how do I do that? Is there another way to do what I want to do?
1. I have a subroutine that takes a filepath (and if disconnected also a SqlConnection) and loads the referenced file into a database as a BLOB.
2. I have 3 separate projects in 1 VS solution that all run basically the same version of this code.
3. I want all 3 to run EXACTLY the same code.
4. I want 1 version of this code so that any changes made don't need to be made in 3 places.
5. I have a few other instances like this for other subroutines.
LINQ. Reducing The Code By Using Dynamic Queries?
Feb 17, 2011I use the following code to fill the Table1 dictionary with the information found within the LINQ query.
Dim DB As New DatabaseDataContext
Dim Table1 As New Dictionary(Of String, Integer)
Dim Table2 As New Dictionary(Of String, Integer)
[code].....
Select A Listviewitem In Code?
Feb 11, 2011I have a form that has a listview with a number of items on it. In certain circumstances, when I load the form, I want a particular item to be automatically selected. The user will select the item to be selected from another form, and I will pass this item to the form in question.
But how do I tell the listview 'hey, set this item as your selected item?" There isn't a writable 'SelectedItem' property.
VS 2005 Listviewitem Highlighting Set Via Code?
May 10, 2011I have a listview with the 'view' set to 'List' and 'multiselect' set to 'false'. What I'm doing is setting the selected item when the interface first loads to a value from the database. This works fine, and the code responds appropriately to the selected value. However, the selected item is not highlighted in the listview, so the user doesn't know which item is selected initially.
Is there a property or method that controls this behavior?
Line Of Code Is Generating This Error - Object Reference Not Set To An Instance Of An Object?
Aug 14, 2010with datagridview1
while looping through all the cells
i am trying to allot a cell value to another cell value basing on some conditions
& finally delete one column.my code is as fallows
Dim i, x As Integer
i = 0
x = Me.DataGridView1.Rows.Count[code]....
error i am getting is : Object reference not set to an instance of an object.it is extremely surprising for me the same code has worked nice for me but why & how the same line of code is generating this error.
Fill_Text Code Throws An Error : System.NullReferenceException:Object Reference Not Set To An Instance Of An Object
Apr 18, 2010I got the following code from the demo code samples and just changed the textbox names. But it throws an error:
Private Sub Fill_TextBox()
Dim Num As Integer
Dim DSet As DataSet
[code]....
The error is:
System.NullReferenceException:Object reference not set to an instance of an object.
Event Handler Code Cause A Object Reference Not Set To An Instance Of An Object. Error (only Present On Live Server, Ok On Dev)?
Mar 4, 2010Here is the code for the button click event;
Protected Sub CompetenciesButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles CompetenciesButton.Click
Dim con As String = WebConfigurationManager.ConnectionStrings("foo").ToString()
[code].....
Initialising New Label In Code - Object Reference Not Set To An Instance Of An Object
Nov 28, 2011I'm converting an application from VB6 to VB.NET, and am required to declare and initialise some controls in code (control arrays). I have it declared globally, so other forms can access the data stored within them, and then I try to manipulate them inside the Form_Load() sub:
Public lblDataZone() As Label
Private Sub Form_Load() Handles Me.Load
lblDataZone(0) = New Label
[code]....
The error I get says "Object reference not set to an instance of an object". I feel like I'm missing something huge here, but what's wrong with it?
Active Directory Code: Object Not Set To An Instance Of An Object?
May 2, 2012 I have a code section in my current active directory program in which it gives the error in the title above at the line:
If results.Path = "" Then from below code:
Dim results As SearchResult = Nothing
[code].....
Getting Code Of An Object Is Executing Even When The Current Object Is Nothing?
Jan 19, 2012I stumbled upon the statement "If Me IsNot Nothing" several times. Often I find this in WinForms samples.I dont't get the sense or meaning of this line. "Me" refers to the current Object or Form, so if I am executing this line "Me" can't be Nothing. Or am I missing something here?Is there a way that Code of an Object is executing even when the current Object is Nothing?
View 12 RepliesCalculating GCF And Reducing
Jan 27, 2011I understand the basics of using VB.NET, what I don't understand is what I need to tell the computer to do. I'm supposed to create a subprogram to calculate the greatest common factor and another subprogram to reduce the fraction from the answers retrieved from the first subprogram. My teacher said something about using Mod to calculate it, and also attempted and failed to explain ByVal and ByRef parameters. I don't even know where to begin other than the parameters I have for each, and even those have a high chance of being completely wrong.[code]
View 1 RepliesReducing The Memory Usage?
Aug 30, 2009I've been having complaints about my applications that they use to much memory.Is there a way to make them use less?
View 11 RepliesSql Server - Reducing SQL Connections To Just 1 - ASP.net?
Feb 7, 2012I am currently working on an asp.net web page with a GridView displaying a table from a database.This GridView has 4 DropDownLists that will be used to filter the data shown on the GridView. When the page loads 4 Sub routines are run, each one connecting to the database with a select statement to fill the DropDownList with relevant filter headings.
Initially, I had one connection with a loop that populated all of the drop downs but these contained duplicates. I then split the filling of each DDL so that the select statements could contain DISTINCT. I would like (and am sure there is a way here) to be able to populate all of the DDLs with data from one connection.
Code for one connection:
Protected Sub FillDepDDL()
Dim conn As New SqlConnection()
conn.ConnectionString =
[code]....
The other 3 column names: FirstName > DDLFN, LastName > DDLLN, Wage > DDLWag.This is only a test DB and the princibles learned here will be applied to a larger live project.
Reducing Strings To A Certain Length If They Are Longer?
Apr 27, 2009I'm generating a list of names from my database, but I need to validate them so they are no longer than 15 characters.
Dim Name As String
Dim txtFirst = "../../Names/first.txt"
Dim txtLast = "../../Names/last.txt"
[Code]....
I need Name to be no longer than 15 characters, and it doesnt matter if the name stays in tact, it just needs to cut off characters from the end of the string until its 15 or less.
Reducing The Number Of Colors In An Image?
Dec 23, 2011In the process of creating an Icon object, I need to reduce the numbers of colors in an image from thousands down to 256 or less. I do this by "chromatizing" the RGB values - counting the colors - then re-iterating the process with heavier "chromatization" until the number of colors is reduced to my requirement.
I searched these forums and google on this subject to find out more - but I found that I alone call this process "chromatization" it seems. So I was hoping someone could help me out with the correct terminology.
Specifically, I want to use the correct terminology on my UI buttons (at present I have a button labeled [Chromatize] . .) and I am curious as to whether it would be good practice to "chromatize" the Green most heavily, the Red more moderately, and the Blue least . . . or just "chromatize" them all equally which is what I have been doing
Reducing The Range Of A Bluetooth Device?
Oct 22, 2010i am currently working on an application that reads the MAC addresses of all phones within the range of our bluetooth reader on the workstation. However, we would like to reduce the range of the reader to < 1 meter. I have dont alot of research and the only solution that i have found is a hardware one; i.e. changing the device to a class 3 or getting a custom made device that will have it's range adjusted to our preferences. However, i also know that we can adjust the power that runs through the bluetooth device in order to reduce the range. Is there any way that we can reduce the power of the device ? We don't have many funds atm and we're looking at a software solution and not a hardware one.
View 4 RepliesVS 2005 Reducing The Combo List?
Sep 14, 2010I have a combo which contains a lot of different colours. If I press b it goes to the b's in the list and if I press it again it goes to the next b. Is it possible to jump to the colour as I type it so if I type blu it would go to blue. Currently it jumps to the first b when I type b but ignores the lu for blue.
View 4 RepliesVS 2008 Reducing Space Between Fonts?
Nov 6, 2010Dim a as string = "a"
Dim b as string = "b"
Dim c as string = "c"
[code]....
.net - Reducing Flicker When Change Images In A Panel?
May 4, 2009How do I reduce flicker in a vb2005 panel?Inside the parent panel I have 2 other panels that I'm am using.
The outer most panel contains a background sprite and the two innermost panels are overlays that change to fit the places in the background sprite.When I change the overlay sprites I would like to reduce the flicker and make it a smooth transition from one sprite to the next.
Here is the code that changes the images in the overlay panels the overlay panel is not changed if the new value is the same as the old value
[Code]...
Asp.net - Reducing The ViewState Size On A Legacy System?
Jan 21, 2012I've looked up ways to reduce the ViewState:
Viewstate Optimisations
Strategies for reducing ViewState size in asp.net
However, due to the situation I'm in, I need the quickest and most effective ways to reduce the ViewState size. The legacy system I'm working on is bloated and routinely has a ViewState that's 800Kb+ on multiple postbacks.
For example, I'm pretty sure populating drop down lists with 100+ items on multiple post backs is one of the culprits, correct?
Disabling the ViewStae entirely doesn't appear feasible. It breaks all of the controls, of which there are many, rendering the pages unusable. If this is the best approach, how should I go about handling all the broken controls?
Reducing A Dimension And Resolution Of A Picture Image?
Sep 6, 2009<Visual Basic 2005 + SQL 2005>I am developing an Human Resource system that has to have a pictue image for each employee. I can't ask HR person that takes a picture and reduce it to upload to the HR system.
View 2 RepliesVS 2008 Reducing The Size Of The Tabs On A Tab Control?
Jun 28, 2011I noticed that when using a single letter as the title on a tab of a Tab Control , the tab is bigger that it should . Look on this example :
The above Tab Control behaves normally because the text on each tab is sufficient to keep it big enough . The lower Tab Control , however , has its tabs too big . Is it possible to reduce its width ? I saw there is an ItemSize property of the Tab Controls , but unfortunately I can only modify the height of the tabs . No matter what value I set for its width , the width remains always the same (and larger than it should) ...
Error: MSDatasetGenerator Failed. Failed To Generate Code Object Reference Not Set To An Instance Of An Object
Jul 28, 2009I created a typed dataset a day or so ago, then I added a whole bunch of tableadapter/tables with some relationships etc... suddenly out of nowhere it decides my dataset "is not defined". everywhere in my code where i use this dataset now has an error. I tried not to pull out my hair and do a Clean then Rebuild solution... out of nowhere it just refuses to generate code. Object reference not set to an instance of an Object. It would be nice if it was my object so i could find it but it's not.
Curiously I also lost the little database icon on the dataset in the solution explorer.I can still open it in the designer and preview my queries etc... it just wont make the code. it's driving me insane. anyone got a solution?
Memory Management - Reducing The Commit Size Of Application
Oct 15, 2009I have an application which I've developed which queries Active Directory information and stores about 15 properties into a Datatable which is kept in memory. I need to decrease the amount of "Commit" memory it is setting aside. The application stays active in the system tray and allows for quick searching of information along with pictures for users. I have a class, which is able keep memory usage down pretty low. It runs on a timer every 10 seconds and listed below:
[Code]...
Reducing An If Statement Based On Checkbox / Radio Button?
Jan 11, 2012I have a project in which I have to display a picture box based on:
Which radio box is checked
and
if a checkbox to make the picture box visible is checked. As someone who values clean, good code this is my code and it horrifies me. My question, is there some way to condense the following using cases or some other construct I don't know in VB.net?
If CheckBox1.Checked = False Then
BooksPictureBox.Visible = False
MusicPictureBox.Visible = False
[Code]....
Note- all the images stack on one another, and all of them start without being visible.
Reducing Memory Usage When Storing Data In A Program - C#
Apr 18, 2012I have an ArrayList that stores 100,000+ numbers inside of it. Each number is 10 digits in length or smaller. The program itself has data input into it, of which it loops through the user input to see if any of their numbers are already in the array using if ArrayList.Contains(userinput).
It would appear that when having an ArrayList of this size a LOT of memory is being used. Would there be a faster way to run this, E.g. Database or If TextFile.Contains(Line)?