So I\'ve been looking to set a default value for my combobox. I found a few things but none of them seem to work.
Actually, it works if I create a simple combobox and us
It looks like you're searching the cbxCategory.Items collection for a string, but it contains items of type ComboBoxItem. Therefore the search will return -1.
cbxCategory.SelectedIndex
should be set to an integer from 0
to Items.Count-1
like
cbxCategory.SelectedIndex = 2;
your
cbxCategory.SelectedIndex = cbxCategory.Items.IndexOf("New")
should return -1 as long as no ComboboxItem mutches the string ("New");
another solution though i don't like it much would be
foreach(object obj in cbxCategory.Items){
String[2] objArray = (String[])obj ;
if(objArray[1] == "New"){
cbxCategory.SelectedItem = obj;
break;
}
}
perhaps this also requires the following transformation to your code
foreach (string[] result in list)
{
cbxCategory.Items.Add(result);
}
I haven't tested the code and i am not sure about the casting to String[2] but something similar should work
Here's my simple solution
var list = comboBox1.Items.Cast<string>().ToList();
cbxCategory.SelectedIndex = list.FindIndex(c => c.StartsWith("test"));
You can use LINQ.
//string command = "SELECT category_id, name FROM CATEGORY ORDER BY name";
//List<string[]> list = database.Select(command, false);
// sample data...
List<string[]> list = new List<string[]> { new string[] { "aaa", "bbb" }, new string[] { "ccc", "ffffd" } };
cbxCategory.Items.Clear();
foreach (string[] result in list)
{
cbxCategory.Items.Add(new ComboBoxItem(result[1], result[0]));
}
ComboBoxItem tmp = cbxCategory.Items.OfType<ComboBoxItem>().Where(x => x.ResultFirst == "bbb").FirstOrDefault();
if (tmp != null)
cbxCategory.SelectedIndex = cbxCategory.Items.IndexOf(tmp);
ComboBoxItem
class:
class ComboBoxItem
{
public string ResultFirst { get; set; }
public string ResultSecond { get; set; }
public ComboBoxItem(string first, string second)
{
ResultFirst = first;
ResultSecond = second;
}
}
My solution:
int? defaultID = null;
foreach (DataRow dr in dataSource.Tables["DataTableName"].Rows)
{
if ((dr["Name"] != DBNull.Value) && ((string)dr["Name"] == "Default Name"))
{
defaultID = (int)dr["ID"];
}
}
if (defaultID != null) comboBox.SelectedValue = defaultID;