Selecting Contacts from the List
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The SelectButton control on the contact list form processes all of the contacts selected by the user. A collection of ListViewItem objects is obtained from the SelectedItems property of the ListView object. The collection is iterated over and a string is appended with the SigninName of the selected contact and delimited with a comma. The genericdictionary<int, string> that was created and filled when the contact list was loaded is used here to obtain the SigninNames of the selected contacts.
private void SelectButton_Click(object sender, EventArgs e)
{
/*
* When this form is opened and the SelectMode property is
* set to true, this selectButton is displayed so that the user
* can select multiple contacts. The selected contacts are returned
* with the SignInName property which will contain a comma-separated list
* of contact sign-in names.
* This code iterates on the collection of selected listview items and looks
* up the corresponding signin name from the dictionary<int,string> object listDict
* Each signin name is appended to a string. Until the count of
* selected contacts processed by the foreach loop reaches the total number of contacts
* processed, a comma is appended to the string.
*/
StringBuilder sb = new StringBuilder();
int currentSelectedContact = 1;
foreach (ListViewItem selectedContactItem in contactListView.SelectedItems)
{
if (contactListView.SelectedItems.Count == 1)
{
//append signin name of contact
sb.Append(listDict[selectedContactItem.Index+1]);
}
else
{
//append signin name of contact
sb.Append(listDict[selectedContactItem.Index+1]);
//append a comma if this contact is not the last contact selected
if (currentSelectedContact < contactListView.SelectedItems.Count)
sb.Append(", ");
currentSelectedContact++;
}
}
// fill property with string built by foreach loop
signInName = sb.ToString();
this.Close();
}