I've one button - button1click and textbox in which when i type something and press enter, i'd like to run code from button1click.
How can I do it without copying entire code from button1click into EnterPressed?
private void button1click(object sender, EventArgs e)
{
//Some Code
}
void EnterPressed(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
Execute code from button1
}
}
Maybe something like that? But I'm getting errors...
void EnterPressed(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
button1click(object sender, EventArgs e)
}
}
Just have button1_click call a method and then you can call that same method from anywhere you want to. So in your example:
private void button1click(object sender, EventArgs e)
{
Foo();
}
void EnterPressed(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
Foo();
}
}
void Foo()
{
//Do Something
}
I personally wouldn't manually call another control's event.
void EnterPressed(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
button1click(sender, EventArgs.Empty);
}
}
Related
So what I'm trying to do is when I press a certain key, it will send keys. This is what I have so far. When I click F1 it doesn't do anything, and I'm not sure why.
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.F1)
{
SendKeys.Send("Example Text");
}
}
Try :
private void Form1_Load(object sender, EventArgs e)
{
this.KeyPreview = true;
this.KeyDown += new KeyEventHandler(Form1_KeyDown);
}
void Form1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode.ToString() == "F1")
{
MessageBox.Show("F1 is pressed");
}
}
Hello :) I Actually want to ask something
So my aim here is "If I click the button 1, the button 2 will be clicked too "
"Is it possible ? Click a one button so the other button will be clicked ?"
Here is my Code:
Button btn1 = sender as Button;
if (btn1 == button1){
button2.PerformClick();
}
It actually does not work it seems there is something wrong
I suggest extracting methods.
Before:
private void button1_Click(object sender, EventArgs e)
{
Routine 1 code ...
Routine 2 code ... // <- do not copy yourself; copy + paste is evil!
}
private void button2_Click(object sender, EventArgs e)
{
Routine 2 code ...
}
After:
//TODO: think over the right name
private void Routine1()
{
Routine 1 code ...
}
//TODO: think over the right name
private void Routine2()
{
Routine 2 code ...
}
...
private void button1_Click(object sender, EventArgs e)
{
Routine1();
Routine2();
}
private void button2_Click(object sender, EventArgs e)
{
Routine2();
}
It is very simple.
private void button1_Click(object sender, EventArgs e)
{
if ((sender as Button) == button1)
{
button2_Click(sender, e);
}
}
private void button2_Click(object sender, EventArgs e)
{
}
Unless you have a weird reason for doing this, don't!
You should prefer something like this :
void button1_Click(object sender, EventArgs e)
{
DoWork1();
DoWork2();
}
void button2_Click(object sender, EventArgs e)
{
DoWork2();
}
I have many labels on the form, and every label invokes same method with different argument(which belongs to label text/name). Here is the code:
//"res" is an array
private void label1_Click(object sender, EventArgs e)
{
checkresult(res[0]);
}
private void label2_Click(object sender, EventArgs e)
{
checkresult(res[1]);
}
private void label3_Click(object sender, EventArgs e)
{
checkresult(res[2]);
}
private void label4_Click(object sender, EventArgs e)
{
checkresult(res[3]);
}
private void label5_Click(object sender, EventArgs e)
{
checkresult(res[4]);
}
private void label6_Click(object sender, EventArgs e)
{
checkresult(res[5]);
}
private void label7_Click(object sender, EventArgs e)
{
checkresult(res[6]);
}
private void label8_Click(object sender, EventArgs e)
{
checkresult(res[7]);
}
private void label9_Click(object sender, EventArgs e)
{
checkresult(res[8]);
}
I just want to precise my code by defining only one method for all labels. How can i do it?
A pseudocode may look like this:
label1.Click += label_Click(object sender, EventArgs e);
label2.Click += label_Click(object sender, EventArgs e);//SAME HANDLER
label3.Click += label_Click(object sender, EventArgs e);//SAME HANDLER
....
and after
private void label_Click(object sender, EventArgs e)
{
if(sender == label1)
checkresult(res[0]);
else if(sender == label2)
checkresult(res[1]);
...
...
}
First let all of your labels use the same Label_Click event.
private void Label_Click(object sender, EventArgs e)
{
Label temp = sender as Label;
if (temp != null)
{
string labelName = temp.Name;
string labelId = labelName.Substring(5, labelName.Length);
int id = int.Parse(labelId) - 1;
checkresult(res[id]);
}
}
You could set anonymous delegates in when you make the event handler
label1.Click += (s,e) => {checkresult(res[0]); };
label2.Click += (s,e) => {checkresult(res[1]); };
label3.Click += (s,e) => {checkresult(res[2]); };
In WinForms, set your Index to Tag of Label and set each OnClick event to same EventHandler
private void lbl_Click(object sender, EventArgs e)
{
checkresult(res[Convert.ToInt32((sender as Label).Tag)]);
}
I'm working on a Web browser in Visual Studio 2010, but I can't update the tab's name to the website's name. For example, when you visit a website like CNN.Com, I want the tab to also say, "cnn.com". The project isn't using the default WebBrowser form, by the way. Please explain it in the simplest way possible since I'm new to C#(Just moved from C++ and Java) so I'm not familiar with working with Windows forms. Thanks. Any help is appreciated.
Here's an image of the problem: http://postimage.org/image/5ym4yx0pt/
....
public Form1()
{
InitializeComponent();
}
int i = 1;
private void Form1_Load(object sender, EventArgs e)
{
WebBrowser Browse = new WebBrowser();
//Load a tab when loading form
tabControl1.TabPages.Add("Tab");//problem
tabControl1.SelectTab(i - 1);
Browse.Name = "Lithium Browser";
Browse.Dock = DockStyle.Fill;
tabControl1.SelectedTab.Controls.Add(Browse);
i++;
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Navigate("www.google.com");
}
private void button1_Click(object sender, EventArgs e)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Navigate(textBox1.Text);
}
private void toolStripButton1_Click(object sender, EventArgs e)
{
WebBrowser Browse = new WebBrowser();
tabControl1.TabPages.Add("Tab"); //problem
tabControl1.SelectTab(i - 1);
Browse.Name = "Lithium Browser";
Browse.Dock = DockStyle.Fill;
tabControl1.SelectedTab.Controls.Add(Browse);
i++;
}
private void toolStripButton2_Click(object sender, EventArgs e)
{
tabControl1.TabPages.RemoveAt(tabControl1.SelectedIndex);
tabControl1.SelectTab(tabControl1.TabPages.Count - 1);
i = i- 1;
}
private void toolStripButton3_Click(object sender, EventArgs e)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).GoBack();
}
private void toolStripButton4_Click(object sender, EventArgs e)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).GoForward();
}
private void toolStripButton5_Click(object sender, EventArgs e)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).GoHome();
}
private void toolStripButton6_Click(object sender, EventArgs e)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Refresh();
}
private void toolStripButton7_Click(object sender, EventArgs e)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Stop();
}
private void yahooSearchToolStripMenuItem_Click(object sender, EventArgs e)
{
toolStripDropDownButton1.Text = yahooSearchToolStripMenuItem.Text;
}
private void youtubeSearchToolStripMenuItem_Click(object sender, EventArgs e)
{
toolStripDropDownButton1.Text = youtubeSearchToolStripMenuItem.Text;
}
private void googleSearchToolStripMenuItem_Click(object sender, EventArgs e)
{
toolStripDropDownButton1.Text = googleSearchToolStripMenuItem.Text;
}
private void toolStripButton8_Click(object sender, EventArgs e)
{
if (toolStripDropDownButton1.Text == googleSearchToolStripMenuItem.Text)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Navigate("http://www.google.com/search?q=" + toolStripTextBox1.Text);
}
if (toolStripDropDownButton1.Text == yahooSearchToolStripMenuItem.Text)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Navigate("http://search.yahoo.com/search?p=" + toolStripTextBox1.Text);
}
if (toolStripDropDownButton1.Text == youtubeSearchToolStripMenuItem.Text)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Navigate("http://www.youtube.com/results?search_query=" + toolStripTextBox1.Text);
}
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
//add KeyUp event for detecting 'Enter' key
//navigate to specified URL withoud pressing the 'Go' button
private void textBox1_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Navigate(textBox1.Text);
}
}
private void toolStripTextBox1_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
if (toolStripDropDownButton1.Text == googleSearchToolStripMenuItem.Text)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Navigate("http://www.google.com/search?q=" + toolStripTextBox1.Text);
}
if (toolStripDropDownButton1.Text == yahooSearchToolStripMenuItem.Text)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Navigate("http://search.yahoo.com/search?p=" + toolStripTextBox1.Text);
}
if (toolStripDropDownButton1.Text == youtubeSearchToolStripMenuItem.Text)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Navigate("http://www.youtube.com/results?search_query=" + toolStripTextBox1.Text);
}
if (toolStripDropDownButton1.Text == youtubeSearchToolStripMenuItem.Text)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Navigate("http://en.wikipedia.org/wiki/" + toolStripTextBox1.Text);
}
if (toolStripDropDownButton1.Text == youtubeSearchToolStripMenuItem.Text)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Navigate("http://en.wikipedia.org/wiki/" + toolStripTextBox1.Text);
}
}
}
private void newTabToolStripMenuItem_Click(object sender, EventArgs e)
{
WebBrowser Browse = new WebBrowser();
tabControl1.TabPages.Add("Tab");
tabControl1.SelectTab(i - 1);
Browse.Name = "Lithium Browser";
Browse.Dock = DockStyle.Fill;
tabControl1.SelectedTab.Controls.Add(Browse);
i++;
}
private void closeTabToolStripMenuItem_Click(object sender, EventArgs e)
{
tabControl1.TabPages.RemoveAt(tabControl1.SelectedIndex);
tabControl1.SelectTab(tabControl1.TabPages.Count - 1);
i = i - 1;
}
private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
}
private void printToolStripMenuItem_Click(object sender, EventArgs e)
{
PrintDialog printDialog = new PrintDialog();
printDialog.ShowDialog();
}
private void printPreviewDialog1_Load(object sender, EventArgs e)
{
}
private void printPreviewToolStripMenuItem_Click(object sender, EventArgs e)
{
//Associate PrintPreviewDialog with PrintDocument.
printPreviewDialog1.Document = printDocument1;
// Show PrintPreview Dialog
printPreviewDialog1.ShowDialog();
}
private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
if (MessageBox.Show("Exit?", "Exit", MessageBoxButtons.OKCancel) == DialogResult.OK)
{
Application.Exit();
}
}
// Bring up 'Print Dialog'
private void pageSetupToolStripMenuItem_Click(object sender, EventArgs e)
{
PageSetupDialog pageSetup = new PageSetupDialog();
pageSetup.PrinterSettings = new System.Drawing.Printing.PrinterSettings();
pageSetup.PageSettings = new System.Drawing.Printing.PageSettings();
pageSetup.EnableMetric = false;
pageSetup.ShowDialog();
}
private void stopToolStripMenuItem_Click(object sender, EventArgs e)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Stop();
}
private void refreshToolStripMenuItem_Click(object sender, EventArgs e)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).Refresh();
}
private void homeToolStripMenuItem_Click(object sender, EventArgs e)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).GoHome();
}
private void previousPageToolStripMenuItem_Click(object sender, EventArgs e)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).GoBack();
}
private void nextPageToolStripMenuItem_Click(object sender, EventArgs e)
{
((WebBrowser)tabControl1.SelectedTab.Controls[0]).GoForward();
}
private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
{
}
private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
{
Form2 about = new Form2();
about.Show();
}
private void calenderToolStripMenuItem_Click(object sender, EventArgs e)
{
calenForm cal = new calenForm();
cal.Show();
}
}
}
...........
Assuming WebBrowser is the built-in WebBrowser, you can fire the OnDocumentTitleChanged event to change the tab text every time the WebBrowser document title is changed.
to do this, in the form load event, after declaring browse, start typing browse.DocumentTitleChanged += and a tooltip should come up saying 'tab to insert this code' or something along those lines. Just tab twice and Visual Studio will insert a new method for you, with a throw new NotImplementedException(); line. Delete that line and replace it with the code changing your tab's text to the browser's DocumentTitle.
If you need any more information, I suggest you check the documentation:
http://msdn.microsoft.com/en-us/library/system.windows.forms.webbrowser.aspx
Though I am confident that using events is the best solution. Events are designed to execute upon certain significant programming 'events' happening, and changing a webpage is one example of such an event. (Events are roughly C#'s equivalent of C++'s function pointers if that helps your understanding at all. Though they are more akin to a std::vector of function pointers.)
Set the HTML title tag for the page text contained within the two tags will show up in the tab that the web page is displayed in.
See the following for more about setting the title in the code behind
How to use Eval in codebehind to set Page.Title
And this link as well
http://www.asprobot.com/ASP.NET/ASPNET-Title-Tag-and-Meta-Tags
I am trying to call one EventHandler method from another. For example, I would like to link Logout button with form exit, so I have this code:
private void FormMain_FormClosing(object sender, FormClosingEventArgs e)
{
if (MessageBox.Show("Bla, bla?", "Logout", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning) == DialogResult.OK)
{
e.Cancel = false;
}
else
{
e.Cancel = true;
}
}
and I want to call it from this event:
private void btnLogOut_Click(object sender, EventArgs e)
{
FormMain_FormClosing(null, 'not sure what goes here');
}
Try this:
private void btnLogOut_Click(object sender, EventArgs e)
{
FormMain_FormClosing(null, null);
}
or
private void button1_Click(object sender, EventArgs e)
{
Form1_FormClosing(
null,
new FormClosingEventArgs(CloseReason.UserClosing, false));
}
Even if my answer cover how to link event handlers part, this particular solution leads you to a problem: form won't close clicking button.
Correct solution is
private void button1_Click(object sender, EventArgs e)
{
Close();
}
Handling the event and asking for confirmation are seperate things:
private static bool UserConfirmedToLogout()
{
return MessageBox.Show("Bla, bla?", "Logout", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning) == DialogResult.OK;
}
private void FormMain_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = !UserConfirmedToLogout();
}
private void btnLogOut_Click(object sender, EventArgs e)
{
Close();
}
When Close() is called, the FormClosing event is fired too.