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());
}
}
Related
I have simple Windows form With just one button which Calls one url
private void button1_Click(object sender, EventArgs e)
{
ProcessStartInfo sInfo = new ProcessStartInfo("http://myurl.com/");
Process.Start(sInfo);
}
When i click exe then it shows button and then i have to click button to perform action. Is it possible to call button click event automatically on clicking exe.
You can do the same with Form.Load event. Just refactor you code with extract method to have no duplicated code and call your function in both event handlers:
private void button1_Click(object sender, EventArgs e)
{
OpenUrl();
}
private void form1_Load(object sender, EventArgs e)
{
OpenUrl();
}
private void OpenUrl()
{
ProcessStartInfo sInfo = new ProcessStartInfo("http://myurl.com/");
Process.Start(sInfo);
}
Simply call:
button1_Click(this, null);
from anywhere in your code.
Am trying to submit a webform pragmatically on button1 click. In first attemp ie after launching my webbrowser from visual studio it automatically submit the form but again clicking on button1, webpage loads but submit button is not invoked. While debugging its shows that the line of code executed but no action takes place.
private void button1_Click(object sender, EventArgs e)
{
webBrowser1.Navigate("xxxx");
webBrowser1.DocumentCompleted += webBrowser1_DocumentCompleted;
}
void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
if (webBrowser1.Url.OriginalString.ToString() == "xxxx")
{
if(webBrowser1.ReadyState==WebBrowserReadyState.Complete)
{
HtmlElementCollection doc = webBrowser1.Document.All;
foreach (HtmlElement ele in doc)
{
if (ele.GetAttribute("name").ToString()== "username")
{
ele.SetAttribute("value","xxxx");
}
if (ele.GetAttribute("name").ToString() == "password")
{
ele.SetAttribute("value", "xxxx");
}
if (ele.GetAttribute("classname") == "btn")
{
ele.InvokeMember("click");
}
}
}
}
textBox1.Text = webBrowser1.DocumentText;
}
You only want to setup the DocumentCompleted event for the web browser once. In your code you keep adding to the event chain each time the button is pressed which is not the behaviour you want.
You want something like (pseudo code as haven't got VS with me):
// When the form/parent loads bind the event ONCE here.
public void FormLoads()
{
webBrowser1.DocumentCompleted += webBrowser1_DocumentCompleted;
}
// Just navigate here and the event will still be raised
private void button1_Click(object sender, EventArgs e)
{
webBrowser1.Navigate("xxxx");
}
Its Due to your webBrowser1_DocumentCompleted Event is not working when your click on Button.
Just Create one method
Private Void Submit(); and here put your code which you want to perform on click event and call this method from two location one is at button1_click and another webBrowser1_DocumentCompleted so that your code is run at both events.
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());
}
}
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);
}
}
I'm using the C# WebBrowswer control and I have a problem that when a button like "Next" is pressed when the page is not loaded yet the program tries to proceed but instead gives me a null error.
Is there is a function to make the program wait until the page has completed loading?
I tried to put a while loop in the program that checks the title of the html page but then the program freezes. Something like will freeze the program:
while(!webbrowser1.Document.Title.ToString().Equals("NextPageTitle"))
{
}
::NextCommands::
It Doesnt work, i tried that and the button "fblqf" is not clicked. but its not returns null error..
public void button1_Click(object sender, EventArgs e)
{
webBrowser1.Document.GetElementById("q").SetAttribute("value", "חחח");
webBrowser1.Document.GetElementById("btnK").InvokeMember("Click");
webBrowser1.DocumentCompleted += webBrowser1_DocumentCompleted;
}
void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
// do the work you need to do now that that page has completed loading
webBrowser1.Document.GetElementById("fblqf").InvokeMember("Click");
}
Solution:
public void button1_Click(object sender, EventArgs e)
{
webBrowser1.Document.GetElementById("q").SetAttribute("value", "חחח");
webBrowser1.Document.GetElementById("btnK").InvokeMember("Click");
int x=0;
while (x==0)
{
System.Windows.Forms.Application.DoEvents();
if(webBrowser1.Document.GetElementById("pnnext") != null)
break;
}
webBrowser1.Document.GetElementById("pnnext").InvokeMember("Click");
webBrowser1.Document.GetElementById("q").Focus();
}
You need to hook the WebBrowswer.DocumentCompleted event:
Perhaps in your constructor or your OnLoad:
webBrowser1.Document.GetElementById("q").SetAttribute("value", "חחח");
webBrowser1.DocumentCompleted += webBrowser1_DocumentCompleted;
webBrowser1.Document.GetElementById("btnK").InvokeMember("Click");
Then you event looks like this:
void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
// do the work you need to do now that that page has completed loading
}
I Found an easy Solution!!!
public void button1_Click(object sender, EventArgs e)
{
webBrowser1.Document.GetElementById("q").SetAttribute("value", "חחח");
webBrowser1.Document.GetElementById("btnK").InvokeMember("Click");
while (true)
{
System.Windows.Forms.Application.DoEvents();
if(webBrowser1.Document.GetElementById("pnnext") != null)
break;
}
webBrowser1.Document.GetElementById("pnnext").InvokeMember("Click");
webBrowser1.Document.GetElementById("q").Focus();
}