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Why it is not Possible to call textBox1_KeyPress() event from some Button Click event.?

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void btn0_Click(object sender, EventArgs e)
{
MessageBox.Show("called btn 0 click..");
KeyPressEventArgs e0 = new KeyPressEventArgs('0');
textBox1_KeyPress(sender, e0);
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
MessageBox.Show("called txtbox_keypress event...");
}
}
Am sorry if this is a silly question,I have just started to learn windows forms, I still find material on the internet confusing.I want to implement calculator. So when number button is pressed it should be filled in textbox. So I thought calling textBox1_keypress() event from button click event would work??? but its not working,
I can manually write the logic in button click event to fill text in text box but if i do so, i have to do the same thing in button1_KeyPress event too. so it would be duplication of code right??...so i thought solution was to call textBox1_KeyPress() event from both button click event and button key press event...but its not working .So what should i do???..is there any other approach which should i follow.

so it would be duplication of code right??
Yes, it would be. So you can do
private void btn0_Click(object sender, EventArgs e)
{
CommonMethod(e);
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
CommonMethod(e);
}
private void CommonMethod(EventArgs e)
{
//Your logic here.
}

The TextBox KeyPress event handler (textBox1_KeyPress) is called after the user presses a key. The KeyPressEventArgs parameter includes information such as what key was pressed. So calling it from your btn0_Click method isn't going to set the text for the TextBox.
Rather, you want to (probably) append whatever number the user pressed to the text already present in the TextBox. Something like
private void btn0_Click(object sender, EventArgs e)
{
textBox1.Text += "0";
}
might be closer to what you're trying to accomplish.

You could put the logic in an extra function like so:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void btn0_Click(object sender, EventArgs e)
{
NumberLogic(0),
}
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
// I don't know right now if e contains the key pressed. If not replace by the correct argument
NumberLogic(Convert.ToInt32(e));
}
void NumberLogic(int numberPressed){
MessageBox.Show("Button " + numberPressed.ToString() + " pressed.");
}
}

You don't want to tie the events together like that.
A key-press is one thing, handled in one way.
A button click is something totally different and should be handled as such.
The basic reason is this,
The button doesn't know what number it is, you need to tell it that.
A key-press on the other hand, knows what number was pressed.
If you REALLY want to, for some reason, you could use SendKeys to trigger your key-press event in a round-about way, from the button.
SendKeys.SendWait("0");

I can suggest to you to use an Tag Property of the Buttons. Put in it the value of each button in Design mode or in Constructor, create one button event handler for all buttons and use Tag value:
Constructor:
button1.Tag = 1;
button2.Tag = 2;
button1.Click += buttons_Click;
button2.Click += buttons_Click;
Event hadler:
private void buttons_Click(object sender, EventArgs e)
{
textBox1.Text = ((Button)sender).Tag.ToString();
}

Why textbox click event not firing

I have a textbox and it's readonly. When I click on I want it to call my button click event:
private void tbFile_Click(object sender, EventArgs e)
{
//btnBrowse_Click(sender, e);
MessageBox.Show("test");
}
When click on the textbox, nothing happens. How do I fix it?
Update:
private void btnBrowse_Click(object sender, EventArgs e)
{
openFile();
}
private void tbFile_Click(object sender, EventArgs e)
{
//btnBrowse_Click(sender, e);
if (tbFile.Text != "")
{
openFile();
}
}
public void openFile()
{
var FD = new System.Windows.Forms.OpenFileDialog();
FD.Filter = "DBF Files|*.DBF";
FD.InitialDirectory = #"C:\";
if (FD.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
string fileToOpen = FD.FileName;
tbFile.Text = fileToOpen;
}
}
When I hit browse button and select a file, the browse file window comes up again. So it's appearing twice now and the textbox click is still not working.

There is no reason that can be inferred from the information you provided why you shouldn't trigger the openFile() method when you click on the tbFile control.
The fact that the textbox is set to readonly does not stop it from raising the click event in any way.
The only possibility is that the method is not assigned to the click event of the control.
Make sure in the event properties of the control that the click event is indeed assigned to the "tbFile_Click" method.
Just because there exsits a method that's called the same as a control but has "_Click" added does not make it get executed unless you specifically tell c# you want to associate that method with the click event of the control.
When you assign the method through the event window, C# generates a code file behind the scenes that adds the callback to that specific event.

You should use the btnBrowse.PerformClick() method to simulate a user click, instead of calling the handler.

The default I got from VS 2013 was a 'MouseClick' function so this works:
private void btnBrowse_Click(object sender, EventArgs e)
{
MyAwesomeFunction(sender);
}
private void tbFile_MouseClick(object sender, MouseEventArgs e)
{
MyAwesomeFunction(sender);
}
private void MyAwesomeFunction(object sender)
{
MessageBox.Show("test");
}

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());
}
}

How can I use Enter to call event handler?

I have a textBox and search button, I would ask about how can I make the user can click Enter to start searching without need to go and click the search button?

This would be best practice
private void txtSearch_Enter(object sender, EventArgs e)
{
AcceptButton = btnSearch;
}
private void txtSearch_Leave(object sender, EventArgs e)
{
AcceptButton = null;
}

The Form has a property called "AcceptButton" that identifies a button that should be associated to the "Enter" keypress. Its considered the "default action" for the form.
More info here:
Windows Form - AcceptButton property

If you want to use something other than Enter/Return, you could also try:
private void EnterKeyAction()
{
// Search...
}
private void btnEnter_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == (char)Keys.Return)
EnterKeyAction();
}
private void btnEnter_Click(object sender, EventArgs e)
{
EnterKeyAction();
}

How to handle image click under Button click event

Hi all i am having 2 imagebuttons a gridview and a button. Now if i clicked on Image button i will show a grid. Now under button click i would like to capture which image button was clicked if 1st image button is clicked i would like to some values and if 2nd one is clicked i would like to show another

You can discern which button was pressed by comparing the sender parameter:
void MyButton_Click(object sender, EventArgs e)
{
if (sender == MyButton1)
{
// 1st image button was clicked — some values
}
else if (sender == MyButton2)
{
// 2nd one was clicked — show another
}
}

Can't you create 2 events and one function?
ex:
//Hook both OnClick events to these!
private void OnButton1Click(object sender, EventArgs e) { BeenClicked(button1); }
private void OnButton2Click(object sender, EventArgs e) { BeenClicked(button2); }
private void BeenClicked(Button ClickedButton)
{
if(ClickedButton.Text == Button1) Console.WriteLine("Hi to you too!");
}
Or alternatively you could use:
//Hook both OnClick events to this!
private void OnButtonClick(object sender, EventArgs e)
{
ClickedButton = (Button)sender;
if(ClickedButton.Text == Button1) Console.WriteLine("Hi to you too!");
}
If I understood you right :)