I want to click event button in webbrowser object.
Button is clicked I want to reach out and write the code? For example, the login button is clicked on the webbrowser object in the pop-up on the site to capture the event and would like to write the code?
I write an example for you(how get event clicked button):
private void Form1_Load(object sender, EventArgs e)
{
//Or navigate to your url
webBrowser1.DocumentText = "<html><body><button id=\"btn1\" type=\"button\">Click Me!</button><button id=\"btn2\" type=\"button\">Click Me!</button></body></html>";
}
Call Click event:(when page loaded)
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
webBrowser1.Document.Click += new HtmlElementEventHandler(Document_Click);
}
Get Active Element When User click on document
void Document_Click(object sender, HtmlElementEventArgs e)
{
//Check Element is Button
if (webBrowser1.Document.ActiveElement.TagName == "BUTTON")
{
if (webBrowser1.Document.ActiveElement.Id== "your button id")
{
//Do someting
}
}
}
If I understand correctly, you're using the WebBrowser control in C# WinForms and you would like to fire an event when a button is clicked.
The control doesn't have a click event, but the Document does. To do this you can use WebBrowser.Document.Click event and then loop through the HTML elements to find the one that was clicked.
web.Document.Click += new HtmlElementEventHandler(Document_Click);
This link will help also: webbrowser-control-get-element-by-type
Related
I have a windows form application with multiple buttons. I need to retrieve the text property of any button clicked in order to create a query to the database. the only way I know is to create a button click event and cast the sender as button then do a switch case for each button Id which seems very hectic since I probably will have more than 100 buttons in the entire application. So my question is there a generic key press method I can create which can retrieve the text property of any button pressed/clicked on the form? Please excuse me if the question is not very clear. Any help will be appreciate
Use a single click event handler for all similar kind of buttons. This way there will be click event subscribed for every button but only one method which will be executed for all buttons. You can determine which button was pressed as follows.
Using sender object as follows;
private void button_Click(object sender, EventArgs e)
{
var buttonText = ((Button)sender).Text;
//Query using buttonText
}
Update:
Above answer will still require you to subscribe click event for each button. If you don't want that then have a look at following approach;
You could use (ClickTransparentButton or) disable (Enabled=false) all these buttons and add click event on parent Form. Once you get click event you can get button which was clicked as follows;
private void Form1_Click(object sender, EventArgs e)
{
var p = PointToClient(Cursor.Position);
var control = GetChildAtPoint(p);
if(control is Button)
{
var buttonText = ((Button)control).Text;
//Query using buttonText
}
}
But this has few disadvantages such as, you will not be able to operate these buttons using keyboard.
and more...
Create some function as buttons click handler:
private void buttonClickHandler(object sender, EventArgs e)
{
string buttonName = (sender as Button).Text;
}
2A. Connect Click event of every button to this handler.
2B. To automate connection of button click handler use something like that:
private void connectButtonsHandlers()
{
foreach(var c in this.Controls)
{
if(c is Button)
{
(c as Button).Click += buttonClickHandler;
}
}
}
Add this code to form constructor to perform connection at program start.
I want to pass a button to an event handler outside the scope of the button object.
For example:
void OnClick2(object sender, EventArgs e)
{
button123.text="changed";
}
So I want my click to change the text of a button passed to it. Is there a way to do this other than having the button in scope- can I pass the button object to the event handler somehow?
I am not 100% sure of your question but here is an attempt to answer it.
void ButtonClicked(object sender, EventArgs e)
{
Button button = sender as Button;
if (button != null)
{
button.Text = "changed";
}
}
This allow you to handle any button click and it will change that buttons text.
I need to dynamically create buttons (one for loop) and add "onClick" and "doubuleClick" events on it.
I did it like this:
Button bt = new Button();
bt.Click += bt_Click;
bt.DoubleClick += bt_DoubleClick;
private void bt_Click(object sender, EventArgs e)
{
label1.Text = this.Text;
}
private void bt_DoubleClick(object sender, EventArgs e)
{
//some code
}
First: My "bt_Click" method gets "main form" text in "label1". In debugger I see that sender is a button. What is wrong with it?
Second: My "bt_DoubleClick" event do not react at all, am I doing something wrong here?
Any help is appreciated.
You should cast sender to Button to get the bt.Text:
Button bt = new Button();
bt.Click += bt_Click;
bt.Text = "click me";
bt.Location = new Point(100,100);
this.Controls.Add(bt);
private void bt_Click(object sender, EventArgs e)
{
label1.Text = (sender as Button).Text;
}
Buttons doesn't react to double click event. You can read it here in detail.
In response to the first question, if I understand you correctly, in this.Text, this refers to the form because the method bt_Click is a member of the Main Form class. I think you might have meant to do:
private void bt_Click(object sender, EventArgs e)
{
label1.Text = (Button)sender.Text;
}
Second: Is this just a case of the bt_Click handler firing twice?
The easiest way to do this it is to use "datagrid".
Datagread has the great support for all events and for organization of items (image, text and so on).
I have made "save" or "open" dialog form to browse content from remote SFTP server, very easy with datagrad, but I had a problem to do it with buttons or labels.
i have a problem with user control.
i create it dynamically on my aspx page after clicking on a button:
protected void btnAddRules_Click(object sender, EventArgs e)
{
RuleProperty Control = (RuleProperty)LoadControl("RuleProperty.ascx");
MyPanel.Controls.Add(Control);
}
when i click on a button of my user control, the button event wont fire and the user control will disappear. here is the button event:
protected void btnAdd_Click1(object sender, EventArgs e)
{
WowzaRule rule = GetRuleFromGUI();
RuleList.Add(rule);
//Session["RuleList"] = RuleList;
//List<WowzaRule> test = new List<WowzaRule>();
SaveToXMLFiles(txtdbnum.Text, RuleList);
}
i understand that after pressing the button on mypage the usercontrol is released and if its not created on pag_init or page Load it wont stay, but i need to create it on my button click event and find a way for it not to disapper.
thanks in advance, Daniel
You might have to add an event handler that it can fire the click event and call your delegate
Control.Click += btnAdd_Click1;
Dynamically created controls, once added, have to be on a page on every page load in order to work correctly. What happens in your case:
RuleProperty is added after the button click
Page loads with this control
User clicks on the button within RuleProperty
Control is not added to the control tree during the page load (corresponding code is only in the button click handler, and that button was not clicked)
ASP.NET does not know which control triggered the event, so the event is not processed
To go around this issue you need to add you control on every page loading, for example using some flag stored in ViewState:
protected void Page_Load(object sender, EventArgs e)
{
if (ViewState["AddRuleProperty"] != null && (bool)ViewState["AddRuleProperty"])
{
AddRulePropertyControl();
}
}
protected void btnAddRules_Click(object sender, EventArgs e)
{
AddRulePropertyControl();
ViewState["AddRuleProperty"] = true;
}
private void AddRulePropertyControl()
{
RuleProperty Control = (RuleProperty)LoadControl("RuleProperty.ascx");
MyPanel.Controls.Add(Control);
}
Update.
If you want to remove the control from the page later on in the control's click handler, you need to remove corresponding ViewState key. This is not possible from the control directly, since property Page.ViewState is protected, and also this would have created an unwanted dependency.
What seems as the right way to do this is to subscribe to the very same event from the Page (you might need to make this event visible from the controller) and reset the key in there. Like this:
private void AddRulePropertyControl()
{
RuleProperty Control = (RuleProperty)LoadControl("RuleProperty.ascx");
Control.ButtonClick += RuleProperty_ButtonClick;
MyPanel.Controls.Add(Control);
}
private void RuleProperty_ButtonClick()
{
ViewState["AddRuleProperty"] = false;
}
Please note that event name here is not real, this is just a sketch of what can be done.
Basically, I have an update panel in which i have a link button, when user clicks on the link button all the contents are cleared and textbox shows up in which user enters something and when user hit enter key, the update panel should be refreshed or gets updated or repopulated with all the contents .
How can I do it ???
The way I am trying to do this is that when event handler of link button is fired, I created a hidden button dynamically and assign it a new event handler which will get fired when user hits enter key.This new dynamic button is created inside link button event handler. In this new button event handler I will repopulate the contents back.
The problem with my way is the event handler of dynamically created button is not fired.
Why ???
Please try to answer in c#.
Thanks in advance.
Regards,
My code #
protected void Submit_Click1(object sender, EventArgs e)
{
Label1.Text = TextBox1.Text + TextBox2.Text + " are sucessfully registered";
Button mento = new Button();
mento.cssclass = "invisible";
mento.Click += new EventHandler(mento_click);
// here this new mento button is attached to update panel
updatepanel1.ContentTemplateContainer.Controls.add(mento);
}
Now the problem is mento_click event handler does not get fired ???
You can catch the enter key, in the textbox?
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
//add event keydown
textBox1.KeyDown += new KeyEventHandler(textBox1_KeyDown);
}
void textBox1_KeyDown(object sender, KeyEventArgs e)
{
switch (e.KeyCode )
{
case Keys.Enter:
//YOur updatecode here:
MessageBox.Show("You press enter");
break;
default:
break;
}
}
}
You have to attach the event on page_init or page_load every time theres a request, or the event wont get hooked up to the control.
you can check out this link to understand why:
http://msdn.microsoft.com/en-us/library/ms178472.aspx
Example
if you want to hook it up on the submit you should do something like:
page_init(object sender, EventArgs e)
{
CreateControls();
}
private void CreateControls()
{
//Create button with event and add to the panel
}
clickEvent(object sender, EventArgs e)
{
updatePanel.Update();
}
That should fire correctly the event. Im sorry i just wrote this on the fly and didnt test it, but i hope it gives you de general idea.
Cheers.
To all of you strugling with postback from buttons in asp.net, I would like to mention an alternative and ancient method of dealing with button-click events.
1) name your dynamically created buttons using a Prefix (like for instance this one: btn_). That way, every button you create will have a name starting with this prefix. For example the first button you create will have the name btn_0. You can achieve this by a routine like this one:
For _counter As Integer = 0 To 3
Dim butt As New Button
' the next 1 line is convenient when programming for the .net 4.0 framework:
butt.ClientIDMode = UI.ClientIDMode.Static
butt.butt.ID = "btn_" & _counter
butt.Text = "someting"
page.controls.add(butt)
next
2) ... and then, to handle it all, you can do it like this in the on_load event of your asp.net page:
If IsPostBack Then
For Each key As String In Request.Form
If InStr(Trim(key), "btn_") > 0 Then
Response.Write(Request.Form(key))
End If
Next
End If