CODEWITHSUNDEEP
c#.netwinformscombobox
Elfoc
Elfoc

Reputation: 3689

Selecting default item from Combobox C#

I have few items on my ComboBox items collection, and i'd like to select one item from this list and set it as default item - when app starts - this item is already on comboBox.

I'm trying something like that:

SelectPrint11.SelectedIndex=2;

but error is:

System.ArgumentOutOfRangeException: InvalidArgument=Value of '2' is not valid for 'SelectedIndex'

Edit:

In mylist are 3 items, Printer1, Printer2, Printer3. All are added in ComboBox Properties -> Items -> Collection

Upvotes: 46

Views: 227311

Answers (7)

V4Vendetta
V4Vendetta

Reputation: 38200

You can set using SelectedIndex (which uses a zero-based index)

comboBox1.SelectedIndex = 0;

OR

SelectedItem

comboBox1.SelectedItem = "your value"; //

The latter won't throw an exception if the value is not available in the combobox

EDIT

If the value to be selected is not specific then you would be better off with this

comboBox1.SelectedIndex = comboBox1.Items.Count - 1;

Upvotes: 94

Ayoub CHELLABI
Ayoub CHELLABI

Reputation: 29

this is the correct form:

comboBox1.Text = comboBox1.Items[0].ToString();

U r welcome

Upvotes: 2

AmanAgrawalTech
AmanAgrawalTech

Reputation: 11

    ComboBox1.Text = ComboBox1.Items(0).ToString

This code is show you Combobox1 first item in Vb.net

Upvotes: -1

IndexOutofBounds
IndexOutofBounds

Reputation: 11

first, go to the form load where your comboBox is located,

then try this code

comboBox1.SelectedValue = 0; //shows the 1st item in your collection

Upvotes: 0

Ahmad
Ahmad

Reputation: 780

private void comboBox_Loaded(object sender, RoutedEventArgs e)
{
 Combobox.selectedIndex= your index;
}

OR if you want to display some value after comparing into combobox 

 foreach (var item in comboBox.Items)
            {
                if (item.ToString().ToLower().Equals("your item in lower"))
                {
                    comboBox.SelectedValue = item;
                }
            }

I hope it will help, it works for me.

Upvotes: 3

Tony The Lion
Tony The Lion

Reputation: 63190

This means that your selectedindex is out of the range of the array of items in the combobox. The array of items in your combo box is zero-based, so if you have 2 items, it's item 0 and item 1.

Upvotes: 2

Michael Petrotta
Michael Petrotta

Reputation: 60902

Remember that collections in C# are zero-based (in other words, the first item in a collection is at position zero). If you have two items in your list, and you want to select the last item, use SelectedIndex = 1.

Upvotes: 8

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