How to get current value of a combobox before selectedindexchange method?

Question

Suppose I have a ComboBox and I want to get a previous value of the ComboBox just before it changes to the new selected index.

In a TextBox for example I can get it by using KeyDown of keyevents to get previous value but cant figure out what to do in a ComboBox.

I tried using dropdown event but it went on to call my SelectedIndexChange method of the ComboBox as and when dropdown event was being was called , which I don't want.

Could anyone please help me?

Possible duplicate : http://stackoverflow.com/questions/4801831/how-to-get-the-previous-item-on-dropdownlist-before-onselectedindexchanged-fires — Jason Evans, Feb 22 '13 at 17:54
Possible duplicate: or here http://stackoverflow.com/questions/11496860/getting-previous-value-of-the-combobox — DJ Burb, Feb 22 '13 at 17:54

score 0 · Answer 1 · edited Oct 12 '18 at 12:53

0

You could use something like this.

public Form1()
{
    InitializeComponent();
    cmbBox1.Tag = cmbBox1.SelectedIndex;
}

private void cmbBox1_SelectedIndexChanged(object sender, EventArgs e)
{
    lblPrevState.Text = cmbBox1.Tag.ToString(); // Just store the value of to a variable or do whatever you need to do with it here - each time it calls tag will contain previous index value
    cmbBox1.Tag = cmbBox1.SelectedIndex;
}

All you need to do is set SelectedIndexChangedevent on cmbBox1.

edited Oct 12 '18 at 12:53

Neeraj Kumar

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answered Feb 22 '13 at 18:01

Daniel Wardin

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hey i dont understand how will I use it for combobox ...can u pls sugges ? – Brij123 Feb 22 '13 at 18:12
sorry missread combobox as checkbox, will change example to combobox now – Daniel Wardin Feb 22 '13 at 21:41
See the thing is I have multiple tabs in a dialog box which contains the combobox....so how should I find the value for each tab? – Brij123 Feb 24 '13 at 18:49

How to get current value of a combobox before selectedindexchange method?

1 Answers1