How to Auto-complete a textbox from database in Window form C#

Question

3.00/5 (1 vote)

See more:

Hello,

I want to create an auto complete textbox based on values from a database. If the user enters any letter, then that letter is matched to a value in the database and then is displayed. I can do this in a web application but I am having difficulty with it in a Windows form application

Thank You!!

Posted 22-Feb-12 23:45pm

rajesh@1989

Updated 22-Feb-12 23:50pm

Slacker007

v2

Add a Solution

Comments

Slacker007 23-Feb-12 5:51am

Edits: formatting and readability.

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Abhi KA · Answer 1 · 2012-02-23T00:13:00

Solution 1

try this link

http://webcache.googleusercontent.com/search?q=cache:http://www.csharpaspnetarticles.com/2009/01/winforms-autocomplete-textbox-using-c.html[^]

Posted 23-Feb-12 0:13am

Abhi KA

Comments

Hifni Shahzard 27-Jun-12 1:57am

The above Link is dead. For the above scenario, the basic is each time a text is being entered the OnTextChanged Event fires and will require multiple DB hits to fetch the result. What would be the feasible solution other than to avoid multiple DB hits?

Dipanki99 · Answer 2 · 2014-03-09T23:57:00

On Form Load call the Textbox autocomplete method "autocompleteData".

public void autocompleteData()
{
//SuggestStrings will have the logic to return array of strings either from cache/db
var CurrentuserId = CloudKaseWSClient.GetUserDetail(tokenUsr, tokenPasswd, Username);
List<string> l = new List<string>();
var SearchResults = ("Select Database Query").ToList();
foreach (var i in SearchResults)
{
l.Add(i.name);
}
string[] arr = l.ToArray();
AutoCompleteStringCollection collection = new AutoCompleteStringCollection();
collection.AddRange(arr);

txtSearchUser.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
txtSearchUser.AutoCompleteSource = AutoCompleteSource.CustomSource;
txtSearchUser.AutoCompleteCustomSource = collection;
}

OR You want to set static data for AutoComplete Textbox than you have to set In Design view for Textbox property of AutocompleteMode to set SuggestAppend,AutocompleteSource to set CustomSource and add static value inAutocompleteCustomSource.

I hope this solution helps to you..
Happy Coding.:)