CODEWITHSUNDEEP
c#combobox
Paul
Paul

Reputation: 777

determine if item is selected in C# ComboBox

I am developing a windows forms application and load the list from this code:

private void showList()
    {
        TeamTableAdapter teamAdapter = new TeamTableAdapter();
        lstTeamName.DataSource = teamAdapter.GetTeamsActive();
        lstTeamName.DisplayMember = "TeamName";
        lstTeamName.ValueMember = "TeamID";

    }

I want to enable a button if the user selects one of the items. What event should I put the code into. I the following code but the event seems to fire before the user clicks on the list.

 private void lstTeamName_Click(object sender, EventArgs e)
    {
        if (lstTeamName.SelectedIndex > -1)
            btnImportXML.Enabled = true;

    }

I moved my code to the SelectedIndexChange event but it still fires before the user selects an item and the selectedIndex is 0.

Upvotes: 1

Views: 277

Answers (2)

jaquesri
jaquesri

Reputation: 188

I would agree that you don't want to bind to Click as that will likely fire too early.

I recommend you look into the DropDownStyle property. http://msdn.microsoft.com/en-us/library/system.windows.forms.comboboxstyle(v=vs.110).aspx. If you set that to DropDownList then the SelectedItemChanged will fire and SelectedIndex could be > -1

If you leave it as the default DropDown then you may want to use TextChanged and check the Text property.

Upvotes: 1

Wjdavis5
Wjdavis5

Reputation: 4151

You dont want to bind to the Click event but to the SelectedIndexChanged event. You should be able to accomplish this by simply double clicking on the Control in designer.

Upvotes: 2

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