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Preventing navigation to ChildWindow in Silverlight

When we try to navigate to ChildWIndow using AddressString of the Browser the method
private void ContentFrame_Navigated(object sender, NavigationEventArgs e)
does not executing.
And instead of the error happens here
private void ContentFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
{
e.Handled = true;
// ErrorWindow.CreateNew(e.Exception);
}
How to prevent to navigate to the ChildWindow?
Thank you!

call a method from another method in Code behind C#

I need to call btn_submit_Click(object sender, EventArgs e) from another method protected void Timer1_Tick(object sender, EventArgs e) which normally calls by a button click.
Now here in Timer1_Tick compares a time and if current time exceeds, i need to call btn_submit_Click(object sender, EventArgs e) automatically.
protected void Timer1_Tick(object sender, EventArgs e)
{
DateTime et = DateTime.Parse(Session["endtime"].ToString());
if (DateTime.Now.TimeOfDay >= et.TimeOfDay)
{
// btn_submit_Click();
Response.Redirect("Welcome.aspx");
}
else
{
Label1.Text = DateTime.Now.ToLongTimeString();
}
}
Please suggest me a way to do this.

Personally I would take a slightly different approach. You're not actually trying to say that a button was clicked - you're just interested in the same side effects as a button click. So extract a third method which only has the relevant parameters (there may not be any) and call that method from both btn_submit_Click and Timer1_Tick. That way you don't have to come up with a sender and EventArgs for a button click which didn't happen. So for example:
protected void btn_submit_Click(object sender, EventArgs e)
{
// Maybe validation?
Submit();
}
protected void Timer1_Tick(object sender, EventArgs e)
{
DateTime et = DateTime.Parse(Session["endtime"].ToString());
if (DateTime.Now.TimeOfDay >= et.TimeOfDay)
{
Submit();
Response.Redirect("Welcome.aspx");
}
else
{
Label1.Text = DateTime.Now.ToLongTimeString();
}
}
private void Submit()
{
// Common code to execute on either the timer tick or button click
}

Jon Skeet mentioned the right approach. Refactor the code in your btn_submit_click into a central method that can be called by both Button and Timer. But you can still do submit_click(sender, e)
protected void Timer1_Tick(object sender, EventArgs e)
{
....
btn_submit_Click(sender, e);
...
}

How to perform Label click in C#?

I have a label working as a button. I would like when I press a button the click event to this label to take action. for example
private void Label1_Click(object sender, EventArgs e)
{
MessageBox.Show("I pressed this label and showed me this messagebox");
}
Now I want when I press this button, the label1 click event to be performed
private void button1_Click(object sender, EventArgs e)
{
// I want when I press this button something like this happens
Label1.PerformClick();
}

private void button1_Click(object sender, EventArgs e)
{
Label1_Click(sender, e);
}
now if you want to show a message of which control was clicked all in one method do the following
private void label1_Click(object sender, EventArgs e)
{
Control control = (Control)sender;
var name = control.Name;
MessageBox.Show(string.Format("I pressed this {0} and showed me this messagebox",name));
}

Two ways to do this.
First:
private void button1_Click(object sender, EventArgs e)
{
Label1_Click(sender, e); // Just call the Label's click handler
}
Second:
// Bind the Label1_Click handler to the button1 Click event, as they both use the same delegate
button1.Click += new EventHandler(Label1_Click);
With the second approach, note that in C# delegates are multi-cast, so both the button1_Click handler and the Label1_Click handler will be called when the button is clicked, in the order they were bound.

private void button1_Click(object sender, EventArgs e)
{
//What the label click do:
MessageBox.Show("I pressed this label and showed me this messagebox");
}
Is that not easier?
Why do you want to do it ?

I think it would be easier for you to just include the lable click functionality with the button click. Maybe even separate each piece in their own method and call them from the button click. Here is how you'd call another click event.
private void button1_Click(object sender, EventArgs e)
{
label1_Click(sender, e);
}

public class MyLabel:Label
{
public void PerformClick()
{
OnClick(new EventArgs());//InvokeOnClick(this,new EventArgs());
}
}

Running Page Load multiple times

I have a user control on an aspx page that contains filter fields and return a WhereClause. The user conrol will raise an event called FilterApplied when Search is clicked.
On my main form, I add the control with:
<uc1:Filter runat="server" ID="Filter" />
<br />
In my code behind I have:
protected void Page_Load(object sender, EventArgs e)
{
//Register event when filter is changed.
this.Filter.FilterApplied += new EventHandler(this.FilterApplied);
if (Page.IsPostBack)
{ //Do some things that take long
}
}
protected void FilterApplied(object sender, EventArgs e)
{
//Reload the page to refresh the graphs.
Page_Load(sender, e);
}
Problem is:
When I click Search on my user control, the Form_Load runs twice. Once because it is reloaded and then another time because I call it from FilterApplied. If I don't call it from FilterApplied, then the whereclause is still empty.
How can I ensure the Page_Load only run once when Search is clicked?

Your problem lays in multiple registering for FilterApplied event. Each time you call the Page_Load method, you subscribe to this event again. Here is a really simple example of what you are doing, written in WinForms with one button on the form, just to point out your problem:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private int numClicks = 0;
private void Form1_Load(object sender, EventArgs e)
{
button1.Click += button1_Click;
this.Text = numClicks.ToString();
}
private void button1_Click(object sender, EventArgs e)
{
numClicks++;
//try uncommenting and commenting next line of code, and observe the difference:
//button1.Click -= button1_Click;
Form1_Load(sender, e);
}
}

Execute two buttons with single click

I have a simple C # application that contains buttons and a web browser, each button execute a request and displays the result of the request on the web browser. And use the results of a request in the next button.
private void button1_Click(object sender, EventArgs e)
{
webBrowser1.Navigate("http://www.test.com");
}
private void button2_Click(object sender, EventArgs e)
{
if (webBrowser1.Document.GetElementById("tesxtbox1") != null)
{
HtmlElement txt1 = webBrowser1.Document.GetElementById("tesxtbox1");
txt1.SetAttribute("value", "test");
webBrowser1.Document.Forms[0].InvokeMember("submit");
}
}
Is there any method or way to perform the two buttons with a single click, but the second button, do not execute until the web browser is loaded.
in the first button, I added
webBrowser1.DocumentCompleted + = new WebBrowserDocumentCompletedEventHandler (Button2_Click);
but the second button excuted several times, so I added in the last line of the button 2:
webBrowser1.DocumentCompleted - = new WebBrowserDocumentCompletedEventHandler (Button2_Click);
it works, but in the console I find that Button 2 is execute twice
Thanks in advance!

You shouldn't think like executing second button click. There is DocumentCompleted event which you must listen to and execute neccesary code afterwards.

private void button3_Click(object sender, EventArgs e)
{
webBrowser1.DocumentCompleted += (sender, e) => {button2_Click(sender, e);};
button1_Click(sender, e);
}
will register the button2_Click method to be executed after the document is loaded completely as triggered by button1_Click().

You should add an event that will call the code once the document has completed loading.
private void Form1_Load(object sender, EventArgs e)
{
webBrowser1.DocumentCompleted += webBrowser1_DocumentCompleted;
}
void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
button2_Click(sender, e);
}

You could make the following call from your button1_click method.
button2_Click(sender, e);

You could give an argument in the url:
webBrowser1.Navigate("http://www.test.com?excuteSecondButton=Yes");
Then on the second page you check if that argument was given:
PageLoad()
{
if(Request.QueryString["executeSecondButton"].Equals("Yes"))
{
button2_Click(button2, new RoutedEventArgs());
}
}