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## More Related Resource Links

### How to use getElementById to get the elements in a form

There are many ways of accessing form elements, of which the easiest is by using the cross-browser W3C DOM document.getElementById method. Before we learn more about this method, it would be useful to know something about the Document Object Model (DOM), the concept of HTML nodes or elements, and the concept of containers.

Each time you load an HTML page, the web browser generates an internal representation of the page in the form of an inverted tree structure. Let us look at a simple form. We will use this form later to demonstrate the use of the getElementById method.

### Calculate distance, bearing and more between Latitude/Longitude points

This page presents a variety of calculations for latitude/longitude points, with the formulÃÂ¦ and code fragments for implementing them.

All these formulÃÂ¦ are for calculations on the basis of a spherical earth (ignoring ellipsoidal effects) - which is accurate enough* for most purposes. [In fact, the earth is very slightly ellipsoidal; using a spherical model gives errors typically up to 0.3% - see notes for further details].

### How to calculate the distance between two points on the Earth

We offer many Global Database Products that you can use with the below formulas to calculate distances and many other uses. Not sure how to use distance calculations or global databases within your company? See our Global Database Examples for more information on how to use our data within your industry. Be sure to Download a Free Sample of one of our many Global Database Products.

### Binding an array to dropdown list

I have the following string which is a list of urls. How do I get this to work so the url shows for the selection and also is the value?

```allLinks = newAllLinks
Me.DropDownList1.Items.Clear()
Me.DropDownList1.DataTextField = "Link"
Me.DropDownList1.DataValueField = "LinkURL"
Me.DropDownList1.Items.Insert(0, New ListItem(" - Select - ", 0))
Me.DropDownList1.DataSource = allLinks
Me.DropDownList1.DataBind()```

ArgumentNullException: Value cannot be null.
Parameter name: container]
System.Web.UI.DataBinder.GetPropertyValue(Object container, String propName) +121
System.Web.UI.DataBinder.GetPropertyValue(Object container, String propName, String format) +8
System

### how to get an array of all the asp.net textbox control inside create user wizard control?

Hi,

How can I get all the textboxes inside a create user wizard control using getElementsByTagName().

Below is my JQuery code:

```<script type="text/javascript">
function addLoadEvent(func) {
var oldonload = window.onload;
if (typeof window.onload != 'function') {
window.onload = func;
} else {
window.onload = function() {
oldonload();
func();
}
}
}

function prepareInputsForHints() {
var inputs = document.getElementsByTagName("asp:TextBox");
for (var i = 0; i < inputs.length; i++) {
inputs[i].onfocus = function() {
this.parentNode.getElementsByTagName("span")[0].style.display = "inline";
}
inputs[i].onblur = function() {
this.parentNode.getElementsByTagName("span")[0].style.display = "none";
}
}
}
addLoadEvent(prepareInputsForHints);

</script>```

```<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
```

### How to cast integer values as an array of enum values?

Hello all!

I'm working with VS2010 Beta2, ASP.NET and Dynamic Data. I'm using VB but will certainly be happy to receive a C# example if necessary.

I used a few of Steve's examples (Writing Attributes and Extension Methods for Dynamic Data and Dynamic Data - Hiding Columns in selected PageTemplates) to create a custom property attribute to be applied to a dynamic data column and want it to accept an array of enum values (each value will represent a dynamic data page template where this column should not be displayed).  My new attribute works fine when I hardcode it like this, meaning the HideColumnIn attribute is properly populated with the array of enum values:

```<HideColumnIn(PageTemplate.List, PageTemplate.Edit)> _
Public Property My_DD_Column As Object
```

However, I want to store the values to be used for the HideColumnIn in the DB as integer values that correspond to the

### Unity - Inject array

Hi,

I have the following in the config file...

container.RegisterType<ProductInstanceValidatorBase, CartItemStockValidator>();
container.RegisterType<ProductInstanceValidatorBase, MonthlyCartItemValidator>();
container.RegisterType<CartValidator>();

..constructor like so...

public CartValidator(ProductInstanceValidatorBase[] validators)
{
this.validators = validators;
}

...I call the following but the array is empty...

container.Resolve(typeof(CartValidator));

Any ideas?

Cheers, WT.

### Converting ReportDocument object into byte array ?

Hi All,

Is it possible to convert the Report Document object as a byte array and store it in SQL , later retrieve and assing it to a report ?

### Invalid length for a Base-64 char array for my coding in ASP.net C#. How to solve it ?

Hi Friends ,

I have done encrypted password and decode but i got error  like  this  " Invalid length for a Base-64 char array" .

Pls help . Thanks

psswd = txtPassword.Text;

pwed = base64Decode(psswd);

public string base64Decode(string sData)
{
System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();
System.Text.Decoder utf8Decode = encoder.GetDecoder();
byte[] todecode_byte = Convert.FromBase64String(sData);
int charCount = utf8Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
char[] decoded_char = new char[charCount];
utf8Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0);
string result = new String(decoded_char); return result;

### Logic to calculate business hours

Hi All,

I have tried searching all over the web for this logic. Got many but half of them did not match what i was looking for and half were malfunctioning.

I want to calculate business working hours between 2 datetime, where in I should be able to set the working hours as well as weekends and holidays should not be calculated.

Please help me guys... It will be a great help...

### Class which contains an array of objects of type "Class2"

1  Partial Class _Default
2  Inherits System.Web.UI.Page

3 Public Function Ohjoy(ByVal X As Integer) As Integer
4 Dim theClass As New Class1 '= New Class1()
5    theClass.ReSize(0)
6    theClass.myBaby(0).GetName(0) = "Hello" 'Property Chars is read only'
7    Return 1
8 End Function
I have a first class named "Class1". I have a second class named "Class2" Class2, is a member of class 1,
and is implemented as an array of objects of type Class 2.

If I try and call the Accessor GetName() my hard coded value "Hello" in my accessor is not returned? Only
an alpha character like "T"

Also if I try and assigne a value using the setter GetName() it does not work, and the compiler gives me
an error message "property Chars is ReadOnly? Does anyone know what is wrong in my code? Line 6 above

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Ohjoy(1)
End Sub
End Class

Public Class Class1
Dim bs As Integer
Public myBaby() As Class2
Public myB As Class2
Public Function ReSize(By

### Query an arraylist of array list using linq

I have an array list called Customer. I t holds a list of array list which has the account details.

proj.customer -> collection of arraylist of type customer

proj.customer.account -> collection of arraylist of type account

Account array list holds type account and it has a poperty account balance. How can I query all accounts which has account balance  >100

I tried the following one

var Accountlist= from Account accountdetails in proj.customer.account

where accountid.balance >100

select accountdetails.id

But it is always throwing an error saying cannot cast type customer to type account

Please help

### Basic Instincts: Collection and Array Initializers In Visual Basic 2010

Collection Initializers are a great addition to the language and allows concise syntax in order to initialize both framework and user defined collection types.

Spotty Bowles

MSDN Magazine October 2009

### Web Q&A: Windowed and Windowless Elements, Cookie Characters, and More

Edited by Nancy Michell

MSDN Magazine December 2004

### Web Q&A: Request Timeouts, Byte Array Conversion, and More

Edited by Nancy Michell

MSDN Magazine May 2004

### Command Management: Use Design Patterns to Simplify the Relationship Between Menus and Form Elements

In Windows Forms applications, similar commands, such as those in a menu and their counterparts on a toolbar, are not automatically related. They don't fire the same event or run the same handler routine. Yet code that allows the same or similar user commands to fire the same code simplifies development.This article describes the principles of command management and why it's important to have functional commands that are not exclusive to any one UI element. In order to provide an MFC-like command management infrastructure, a design pattern is developed and applied as a series of C# classes.

Michael Foster and Gilberto Araya

MSDN Magazine October 2002

### Web Q&A: Allowing ASP in IIS 6.0, Sorting XML Elements, SSL and Navigation, and More

Edited by Nancy Michell

MSDN Magazine October 2002

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