CODEWITHSUNDEEP
c#windowswinforms
Beau Altman
Beau Altman

Reputation: 37

Detect changes of all textbox values

I have a form with alot of textboxes, and I have a function that I want to run when a value in any of the textboxes is changed. Is there a way to do the same thing for every textbox without duplicating the code for each and every textbox? Here's the code that works for one:

private void Team1Q2_TextChanged(object sender, EventArgs e)
{
    int parsedValue;
    if (!int.TryParse(Team1Q1.Text, out parsedValue))
    {
        Team1Q1.Text = "0";
        return;
    }
    else
    {
        CalculateTotals();
    }
}

Upvotes: 0

Views: 4166

Answers (5)

Mehdi Khademloo
Mehdi Khademloo

Reputation: 2812

in Form_load, assign the text_changed event to all textboxes

foreach (Control item in this.Controls)
{
    if (item.GetType() == typeof(TextBox))
        (item as TextBox).TextChanged += Form6_TextChanged;
}

and then you can handle the all text_changed event

void Form6_TextChanged(object sender, EventArgs e)
{
    TextBox T = sender as TextBox;
    //this is your detail
}

Upvotes: 0

vpv
vpv

Reputation: 938

Try like this...

private void TextBoxEventHandler_TextChanged(object sender, EventArgs e)
{
   var entryField = sender as TextBox;

   lblKeyedValue.Text = entryField.Text.ToUpper();
}

and Add this event handler into textbox(s) like below...

yourTextBoxName.TextChanged += new EventHandler(TextBoxEventHandler_TextChanged);

Upvotes: 0

Ghasem
Ghasem

Reputation: 15623

Just set all the TextChanged events for your TextBoxes to Team1Q2_TextChanged in design mode.

Upvotes: 1

Krishna Veeramachaneni
Krishna Veeramachaneni

Reputation: 2141

Team1Q2_TextChanged is just an event handler you created for one of the textboxes. You can use the same event handler for all the textboxes. You will have to set all the textboxes's changed events to the same event handler.

If you are setting up the eventhandlers in visual studio designer, just copy paste the same event handler for all.

If you are setting up the event handlers in C# code behind, you can do this

textBox1.TextChanged += new EventHandler(textBox_TextChanged);
textBox2.TextChanged += new EventHandler(textBox_TextChanged);
textBox3.TextChanged += new EventHandler(textBox_TextChanged);

If you see I am using the same event handler for all textboxes.

Upvotes: 0

Shaharyar
Shaharyar

Reputation: 12459

Register this event handler for all of your textboxes, and cast the sender object to use the event raiser textbox.

Code:

private void Team1Q2_TextChanged(object sender, EventArgs e)
{
    TextBox senderTextBox = sender as TextBox;
    int parsedValue;
    if (!int.TryParse(senderTextBox.Text, out parsedValue))
    {
        senderTextBox.Text = "0";
        return;
    }

    else
    {
        CalculateTotals();
    }
}

Subscribing event handler:

txtbox1.TextChanged += Team1Q2_TextChanged;
txtbox2.TextChanged += Team1Q2_TextChanged;
txtbox3.TextChanged += Team1Q2_TextChanged;
//so on

Upvotes: 2

Related Questions