Comments by Juhi saf (Top 4 by date)

I've to do it by using observable collection.

Thank you. But the FindString() method is not working here.

No, I've to use an observablecollection and bind it to the listbox. But still its not working correctly. I'll attatch the modified code here.
namespace WpfApplication1
{
public class Class1 : INotifyPropertyChanged
{

private ObservableCollection<book> b1 = new ObservableCollection<book>();
public ObservableCollection<book> B1
{
get
{
return b1;
}
set
{
b1 = value;
OnPropertyChanged("B1");
}
}


public Class1()
{
LoadBookList();

}
private void LoadBookList()
{
try
{
SqlConnection con1 = new SqlConnection("Data Source=.; Initial Catalog= test; User ID= sa; Password=nest123@!;");
con1.Open();
SqlCommand cmd1 = new SqlCommand("select Books from authorinfo where Id=(select max(Id) from authorinfo)", con1);
SqlDataReader myReader = cmd1.ExecuteReader();
while (myReader.Read())
{
string str1 = myReader["Books"].ToString();
string[] arr = str1.Split(',');
foreach (string word in arr)
{
b1.Add(new Book(word));
}
}
myReader.Close();
myReader.Dispose();
}
catch (Exception ex)
{
Console.WriteLine("{0} Exception caught.", ex.Message);
}
}


public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string propertyname)
{

if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyname));
}
}
}
public class Book: INotifyPropertyChanged
{
private string item;
public string ITEM
{
get
{
return item;
}
set
{
item = value;
OnPropertyChanged("ITEM");
}
}

public Book(string x)
{
item = x;
}
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string propertyname)
{

if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyname));
}
}
}
}