Refreshing the combo box according to the update of the list

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4.00/5 (1 vote)

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I have combo box in windows form that data source has set to a List<myobj>. When I added object to this list do I need to reset the combo box datasourse.

Posted 4-May-11 17:20pm

Sanyon_d

Updated 4-May-11 19:35pm

v2

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#realJSOP · Answer 1 · 2011-05-05T08:20:00

Well, it seems to me that you have all of the required tools to TRY it to see if you can do it.

Failing that, this is how I did it:

C#

public partial class Form1 : Form
{
    private List<string> myStrings = new List<string>();

    //--------------------------------------------------------------------------------
    public Form1()
    {
        myStrings.Add("1");
        myStrings.Add("2");
        myStrings.Add("3");
        myStrings.Add("4");
        myStrings.Add("5");

        InitializeComponent();

        comboBox1.DataSource = myStrings;
    }

    //--------------------------------------------------------------------------------
    private void button1_Click(object sender, EventArgs e)
    {
        comboBox1.DataSource = null;

        myStrings.Add("6");

        comboBox1.DataSource = myStrings;
    }

}

Seriously, it ain't rocket surgery...

CodeHawkz · Answer 2 · 2011-05-04T19:05:00

Solution 1

Hi there,

You need to state whether this is for a Windows Forms or Web Forms application.

Regardless, what you need to is set the "DataSource" property of the combo box each time the list is updated. If this is a web application, you need to call "DataBind" method after setting the data source.

Hope this helps :) Regards

Posted 4-May-11 19:05pm

CodeHawkz

Comments

#realJSOP 5-May-11 14:08pm

Read the question - he DID state the platform.

Ed Nutting 5-May-11 14:15pm

My 4 - would have been 5 if you had read the question carefully ;P

CodeHawkz 5-May-11 16:02pm

Lolz :) He updated the question. If you look carefully, you'll see I posted this 1 hour earlier than he posted :)

Points I do not care much (rather at all), all I am trying is to help people. Thanks anyways :)

sk saini · Answer 3 · 2011-05-05T08:07:00

Solution 2

Item collection can't be modified when the DataSource property is set for a combBox. So, once we set DataSource property of dataset it doesn't updates its items thereafter.

But if we use comBoBox.Items.add() to add elements to it. Then it is posible easily.

Posted 5-May-11 8:07am

sk saini