Fire button event manually

Question

I have a search text box on my WPF Windows. Whenever, the user presses enter key after writing some query in the textBox, the process should start.

Now, I also have this Search button, in the event of which I perform all this process.

So, for a texBox:

<TextBox x:Name="textBox1" Text="Query here" FontSize="20" Padding="5" Width="580" KeyDown="textBox1_KeyDown"></TextBox>

private void queryText_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Return)
            {
                //how do I fire the button event from here?
            }
        }

see this post http://joshsmithonwpf.wordpress.com/2007/03/09/how-to-programmatically-click-a-button/ or this answer http://stackoverflow.com/a/7551766/273200 — Bala R, Feb 24 '12 at 05:18

score 1 · Accepted Answer · answered Feb 24 '12 at 05:04

1

It is possible but rather move your search logic into a method such as DoSearch and call it from both locations (text box and the search button).

answered Feb 24 '12 at 05:04

Philip Fourie

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Out of curiosity, can you also mention about the other method? – Cipher Feb 24 '12 at 05:05
Call the event handler directly. For example: `btnSearch_onClick(this, null);` – Philip Fourie Feb 24 '12 at 05:10
@PhilipFourie: That won't do as the event args are being used. – H.B. Feb 24 '12 at 05:15
@H.B. I don't think that is the case. OP wants to call the search button's event which implemtation is not provided. Cannot tell if the search button event is using the args. – Philip Fourie Feb 24 '12 at 05:22
@PhilipFourie: Oh, you are right, sorry about that, then let's say it *might* be a problem. – H.B. Feb 24 '12 at 05:23

score 0 · Answer 2 · answered Feb 24 '12 at 05:06

0

Are you talking about manually invoking buttonSearch_onClick(this, null);?

answered Feb 24 '12 at 05:06

Jason

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score 0 · Answer 3 · answered Feb 24 '12 at 05:10

You can Create a Common Method to do search for ex

public void MySearch()
{
     //Logic
}

Then Call it for diffetnt places you want like...

private void queryText_KeyDown(object sender, KeyEventArgs e)
     {
         if (e.Key == Key.Return)
         {
                      MySearch();
         }
     }

private void buttonSearch_onClick(object sender, EventArgs e)
{
     MySearch();
}

score 0 · Answer 4 · answered Feb 24 '12 at 05:10

A event can not be fired/raised from outside the class in which it is defined.(Using reflection you can definitely do that, but not a good practice.)

Having said that, you can always call the button click event handler from the code as simple method call like below

private void queryText_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Return)
    {
        OnSearchButtonClick(SearchButton, null);
    }
}

Fire button event manually

4 Answers4