Filter listBox1 and show result listBox2

Question

1.00/5 (1 vote)

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Suppose I have two listbox.And one
searchTextbox
On listbox1 contains -
Apple
Alva
Alpha
Angles
Any
Able
Bubble
Ball
Bislesion
Biscuit
Cat
Cool
etc etc.
on searchTextbox I type - A
then show all words on listbox2 which are
started with A.
on Listbox2 will show -
Apple
alva
Alpha
...
...
...
Thanks in advanced

Posted 27-Oct-13 1:07am

Programmer Pavel

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Comments

borntrouble 27-Oct-13 11:53am

Please let us know if you need it for a Windows Based or ASP.NET page.

[no name] 27-Oct-13 14:30pm

borntrouble firstly thanks for your response.
I need it in -
winform (vb.net or csharp)

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MrGlass3 · Answer 1 · 2013-10-27T09:11:00

Solution 1

In the searchTextbox subscribe to the TextChanged event. Within that listener use

int searchLength = searchTextbox.Text.Length;

listbox2.Items.Clear();
for (int i=0; i<listbox1.items.count;i++)   
if( listbox1.Items[i].ToString().substring(0,searchLength) == searchTextbox.Text)
      listbox2.Items.Add(listbox1.Items[i].ToString());

Please note my first submission I accidentally left out the ToString() within the if-statement. The above code is now correct, It had previously read

if( listbox1.Items[i].substring(0,searchLength) == searchTextbox.Text)

Posted 27-Oct-13 9:11am

MrGlass3

Updated 28-Oct-13 5:00am

v3

Comments

[no name] 28-Oct-13 0:43am

Firstly thanks for your nice reply.

if( listbox1.Items[i].substring

DEBUG

1 object'does not contain a definition fosubstring'and no extension method
substring'accepting a first argument of typeobject'could be found (are you
missing a using directive or an assembly referen?)

MrGlass3 28-Oct-13 1:03am

I'm sorry you would have to use the ToString() method before substring.

That if-statement should be:

if( listbox1.Items[i].ToString().substring(0,searchLength) == searchTextbox.Text)