Develop Reference

How to Fire WebBrowserDocumentCompleted event from default Web Browser

I tried two method:
wb.Navigate(Url,true); When i use this webbrowser appear but WebBrowserDocumentCompleted event doesn't fire after page loaded.
wb.Navigate(Url); When i use this WebBrowserDocumentCompleted event is firing but browser doesn't appear on screen. How can i display external browser and fire WebBrowserDocumentCompleted event same time?
private void button1_Click(object sender, EventArgs e)
{
System.Windows.Forms.WebBrowser wb = new System.Windows.Forms.WebBrowser();
wb.DocumentCompleted += WebBrowserDocumentCompleted;
wb.Visible = true;
wb.ScrollBarsEnabled = false;
wb.ScriptErrorsSuppressed = true;
wb.Navigate("http://www.google.com",true);
}
private void WebBrowserDocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
if ((sender as WebBrowser).ReadyState == System.Windows.Forms.WebBrowserReadyState.Complete)
{
// Do what ever you want to do here when page is completely loaded.
}
}

How to implement new tab in CefSharp with correct address and title change?

I am using CefSharp to create a browser. It is working, I can navigate to various websites by using new tab. But when I click on previous tabs, all the tab shows same URL in the address bar and all of them has exactly same title. Here is my code:
private void FormBrowser_Load(object sender, EventArgs e)
{
CefSettings settings = new CefSettings();
Cef.Initialize(settings);
ChromiumWebBrowser browser = new ChromiumWebBrowser(toolStripTextBoxAddress.Text);
browser.Parent = tabControl.SelectedTab;
browser.Dock = DockStyle.Fill;
browser.AddressChanged += Browser_AddressChanged;
browser.TitleChanged += Browser_TitleChanged;
}
// new tab function
public void addNewTab()
{
TabPage tpage = new TabPage();
tpage.Text = "New Tab";
tabControl.Controls.Add(tpage);
tabControl.SelectTab(tabControl.TabCount - 1);
toolStripTextBoxAddress.Text = "";
ChromiumWebBrowser browser = new ChromiumWebBrowser(toolStripTextBoxAddress.Text);
browser.Parent = tpage;
browser.Dock = DockStyle.Fill;
browser.AddressChanged += Browser_AddressChanged;
browser.TitleChanged += Browser_TitleChanged;
}
private void Browser_TitleChanged(object sender, TitleChangedEventArgs e)
{
this.Invoke(new MethodInvoker(() =>
{
tabControl.SelectedTab.Text = e.Title;
}));
}
private void Browser_AddressChanged(object sender, AddressChangedEventArgs e)
{
this.Invoke(new MethodInvoker(() =>
{
toolStripTextBoxAddress.Text = e.Address;
}));
}
// navigate method
private void toolStripTextBoxAddress_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
if (!string.IsNullOrEmpty(toolStripTextBoxAddress.Text))
{
if (!toolStripTextBoxAddress.Text.Contains("."))
{
getCurrentBrowser().Load("http://www.google.com/search?q=" + toolStripTextBoxAddress.Text);
}
else
{
getCurrentBrowser().Load(toolStripTextBoxAddress.Text);
}
}
}
}
// get current browser
private ChromiumWebBrowser getCurrentBrowser()
{
return (ChromiumWebBrowser)tabControl.SelectedTab.Controls[0];
}
// new tab button
private void toolStripButtonNewTab_Click(object sender, EventArgs e)
{
addNewTab();
}
Here is what I have tried:
private void tabControl_SelectedIndexChanged(object sender, EventArgs e)
{
ChromiumWebBrowser currentBrowser = getCurrentBrowser();
toolStripTextBoxAddress.Text = currentBrowser.Address;
}
When i try to open a new tab it is giving me an error in this line return (ChromiumWebBrowser)tabControl.SelectedTab.Controls[0];
How can I solve this problem? Thanks in advance.

I wrote my multi-tab cefsharp code in a very similar fashion to yours, and encountered the same error.
It was cause by the default number of tab pages. (When you drag tabcontrol to your form, it by default comes with 2 tabpages to start with). From the property panel, I removed those two tabpages, so that the browser starts wit zero tabpage. Any tabpage is only added when you start browsing, by inputting url or clicking favorites.
If you do not set the initial number of tabpages to zero, those two "empty" tabpages have no browser attached to them. Therefore the getcurrentbrowser() function fails to find any browser on those empty tabpages and errors occur.

Page_Load run Button_Click

I have a web-part in SharePoint 2013 which adds the new items from excel. The web-part contains upload control, buttons and textbox. I choose the document from upload control and click the button to load items in SP, if it was successfull I see "Successfull" in textbox or "Not successfull" in another way.
My problem: if i refresh page with web-part, textbox still contains the old text, but i want to see it empty after every refresh.
I try to use Page.IsPostBack, but I think I didn't properly use it.
protected void Page_Load(object sender, EventArgs e)
{
if(!Page.IsPostBack)
textbox1.Text = "";
}
protected void btn3_Click(object sender, EventArgs e)
{
if (!Page.IsPostBack)
return;
if(!upload.HasFile)
{
textbox1.Text += "You didn't choose an Excel file";
return;
}
...
}
<asp:Button ID="btn3" runat="server" OnClick="btn3_Click" Text="Add Items" />

In such case, you can implement a special code block to detect browser refresh as
private bool refreshState;
private bool isRefresh;
protected override void LoadViewState(object savedState)
{
object[] AllStates = (object[])savedState;
base.LoadViewState(AllStates[0]);
refreshState = bool.Parse(AllStates[1].ToString());
if (Session["ISREFRESH"] != null && Session["ISREFRESH"] != "")
isRefresh = (refreshState == (bool)Session["ISREFRESH"]);
}
protected override object SaveViewState()
{
Session["ISREFRESH"] = refreshState;
object[] AllStates = new object[3];
AllStates[0] = base.SaveViewState();
AllStates[1] = !(refreshState);
return AllStates;
}
In the button click you can do it as
protected void btn3_Click(object sender, EventArgs e)
{
if (isRefresh == false)
{
Insert Code here
}
}

1 button, 2 webpages, but one webpage at a time?

Here's what H have so far:
private void button1_Click(object sender, EventArgs e)
{
button3.BackgroundImage = slideshow_test.Properties.Resources.ai_yori_aoshi_5370;
}
private void button2_Click(object sender, EventArgs e)
{
button3.BackgroundImage = slideshow_test.Properties.Resources.AiYoriAoshi_feature;
}
private void button3_Click(object sender, EventArgs e)
{
audio.Stop();
if (button1.Enabled == true)
{
timer1.Stop();
pictureBox1.Visible = false;
System.Diagnostics.Process.Start("http://www.watchcartoononline.com/anime/ai-yori-aoshi-guide");
if (button2.Enabled == true)
{
timer1.Stop();
pictureBox1.Visible = false;
System.Diagnostics.Process.Start("http://www.watchcartoononline.com/anime/ai-yori-aoshi-enishi-guide");
}
}
}
this is only my test so far but what i want to do is change what button 3 does, i.e. if button 1 is clicked button three will open webpage 1, if button2 is clicked button 3 will open webpage 2, button 3's image will change depending, but what im finding with what i have done so far is that it opens BOTH pages AT THE SAME TIME ... how to i prevent this? i have tried if, else and else if, same result every time.

Both of your buttons are enabled, you are checking to see if the buttons are enabled or disabled (clickable or not), not which one has been clicked.
also:if (button2.Enabled == true)
is nested in the first conditional, I'm not sure if that's what you want.
You can: disable buttons 1 and 2 after their clicked so that, for instance button2.Enabled will now = false; (but then you will not be able to reclick that button)
More sophisticated, but better, is to use a delegate for the button3, and assign them in your button1_Click and button2_Click events. Something like this:
private void button1_Click(object sender, EventArgs e)
{
button3.BackgroundImage = slideshow_test.Properties.Resources.ai_yori_aoshi_5370;
button3.Click += new EventHandler(this.Button3_Click_First);
}
private void button2_Click(object sender, EventArgs e)
{
button3.BackgroundImage = slideshow_test.Properties.Resources.AiYoriAoshi_feature;
button3.Click += new EventHandler(this.Button3_Click_Second);
}
void Button3_Click_First(Object sender,
EventArgs e)
{
// When the button is clicked,
// change the button text, and disable it.
timer1.Stop();
pictureBox1.Visible = false;
System.Diagnostics.Process.Start("http://www.watchcartoononline.com/anime/ai-yori-aoshi-guide");
}
void Button3_Click_Second(Object sender,
EventArgs e)
{
timer1.Stop();
pictureBox1.Visible = false;
System.Diagnostics.Process.Start("http://www.watchcartoononline.com/anime/ai-yori-aoshi-enishi-guide");
}
You may also have to check and make sure an event handler was not previously assigned, in calse someone clicks button1, then button2, then button1 ect. This is described here: Removing event handlers

You can handle your problem by storing the URL of the webpage in a private field, setting it when buttons 1 or 2 are clicked and reading from it after clicking button 3.
private string _address = null;
private void button1_Click(object sender, EventArgs e)
{
// do other stuff
_address = "http://www.watchcartoononline.com/anime/ai-yori-aoshi-guide";
}
private void button2_Click(object sender, EventArgs e)
{
// do other stuff
_address = "http://www.watchcartoononline.com/anime/ai-yori-aoshi-enishi-guide";
}
private void button3_Click(object sender, EventArgs e)
{
if (_address != null)
{
audio.Stop();
if (button1.Enabled || button2.Enabled)
{
timer1.Stop();
pictureBox1.Visible = false;
System.Diagnostics.Process.Start(_address);
}
}
}
I wasn't sure if all the code in button3_Click is necessary, so I cleared it up a little. I might be a bit off, though.

button.Enabled is always true for all buttons by default unless you set it to false. So you cannot use button1.Enabled property to check which button is pressed. try below approach.
protected void Button1_Click(object sender, EventArgs e)
{
ViewState["Button1Clicked"] = true;
}
protected void Button2_Click(object sender, EventArgs e)
{
ViewState["Button1Clicked"] = false;
}
protected void Button3_Click(object sender, EventArgs e)
{
if ((bool)ViewState["Button1Clicked"])
{
//open webpage2 code comes here
}
else
{
//open webpage2 code comes here
}
}

c# web browser and statustext to show hyperlink

So I have a custom windows form with a tabbed browser. I want to be able to see the hoovered hyperlink in the status bar. I have searched everywhere but nothing yet.
I checked the MSDN under the web browser class which led me to the StatusTextChanged.
So in my code I have
wb.StatusTextChanged += MainWindow_StatusChange;
then
private void MainWindow_StatusChange(Object sender, EventArgs e)
{
WebBrowser wb = new WebBrowser();
this.toolStripStatusLabel2.Text = wb.StatusText;
}
Well, the tool.StripStatusLabel2.Text is empty.
Any help?

You have subscribed the wrong event.
Do this...
private void Form1_Load(object sender, EventArgs e)
{
WebBrowser wb = new WebBrowser();
wb.StatusTextChanged += new EventHandler(wb_StatusTextChanged);
wb.Navigate("http://www.google.de");
}
void wb_StatusTextChanged(object sender, EventArgs e)
{
this.toolStripStatusLabel2.Text = ((WebBrowser) sender).StatusText;
}