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Search Records In GridView And Highlight Results Using ASP.NET | how to highlight search results in gridview using

Dec 3, 2011

In this article I will explain how to search records in gridview and highlight search keywords in gridview using


In Previous post I explained clearly about how to filter gridview records with dropdownlist selection. Now I will explain how to implement search functionality for gridview and highlight search keywords in gridview using 

Here my requirement is I have a web page that contains Search textbox, button and gridview with some data now I want to display data in gridview whenever user enter text in textbox and hit search button after that I need to highlight that resultant keyword in gridview using To implement this first design the table in database and give name UserInfomation

Int(set identity property=true)

After completion table creation write some of css classes to change the appearance of gridview and design aspx page like this

<html xmlns="">
<head id="Head1" runat="server">
<title>Highlight the Search Keywords in Gridview </title>
<style type="text/css">
.GridviewDiv {font-size: 100%; font-family: 'Lucida Grande', 'Lucida Sans Unicode', Verdana, Arial, Helevetica, sans-serif; color: #303933;}
Table.Gridview{border:solid 1px #df5015;}
.Gridview th{color:#FFFFFF;border-right-color:#abb079;border-bottom-color:#abb079;padding:0.5em 0.5em 0.5em 0.5em;text-align:center
.Gridview td{border-bottom-color:#f0f2da;border-right-color:#f0f2da;padding:0.5em 0.5em 0.5em 0.5em;}
.Gridview tr{color: Black; background-color: White; text-align:left}
:link,:visited { color: #DF4F13; text-decoration:none }
.highlight {text-decoration: none;color:black;background:yellow;}
<form id="form1" runat="server">
<div class="GridviewDiv">
Enter UserName :
<asp:TextBox ID="txtSearch" runat="server" />&nbsp;&nbsp;
<asp:ImageButton ID="btnSearch" ImageUrl="~/SearchButton.png" runat="server"
Style="top: 5px; position: relative" onclick="btnSearch_Click" />&nbsp;&nbsp;
<asp:ImageButton ID="btnClear" ImageUrl="~/Clearbutton.png" runat="server" Style="top: 5px;
position: relative" onclick="btnClear_Click" /><br />
<br />
<asp:GridView ID="gvDetails" runat="server" AutoGenerateColumns="False" AllowPaging="True"
AllowSorting="true" DataSourceID="dsDetails" Width="540px" PageSize="10" CssClass="Gridview" >
<HeaderStyle BackColor="#df5015" />
<asp:TemplateField HeaderText="UserName">
<asp:Label ID="lblFirstname" Text='<%# HighlightText(Eval("UserName").ToString()) %>' runat="server"/>
<asp:TemplateField HeaderText="LastName">
<asp:Label ID="lblLastname" Text='<%# Eval("LastName") %>' runat="server"/>
<asp:TemplateField HeaderText="Location">
<asp:Label ID="lblLocation" Text='<%#Eval("Location") %>' runat="server"></asp:Label>
<asp:SqlDataSource ID="dsDetails" runat="server" ConnectionString="<%$ConnectionStrings:dbconnection %>" SelectCommand="select * from UserInformation" FilterExpression="UserName LIKE '%{0}%'">
<asp:ControlParameter Name="UserName" ControlID="txtSearch" PropertyName="Text" />
If you observe above code in header section I written css classes by using those we can change the appearance of gridview, highlight the search keyword by changing the background color and written code to bind gridview and used filter expressions to filter gridview based on search text

Now open code behind file and add following namespaces in code behind

C# Code

using System;
using System.Text.RegularExpressions;
using System.Web.UI;
After completion of adding namespaces write the following code

//  Create a String to store our search results
private string SearchString = "";
protected void Page_Load(object sender, EventArgs e)

public string HighlightText(string InputTxt)
string Search_Str = txtSearch.Text;
// Setup the regular expression and add the Or operator.
Regex RegExp = new Regex(Search_Str.Replace(" ", "|").Trim(), RegexOptions.IgnoreCase);
// Highlight keywords by calling the
//delegate each time a keyword is found.
return RegExp.Replace(InputTxt, new MatchEvaluator(ReplaceKeyWords));

public string ReplaceKeyWords(Match m)
return ("<span class=highlight>" + m.Value + "</span>");
protected void btnSearch_Click(object sender, ImageClickEventArgs e)
//  Set the value of the SearchString so it gets
SearchString = txtSearch.Text;
protected void btnClear_Click(object sender, ImageClickEventArgs e)
//  Simple clean up text to return the Gridview to it's default state
txtSearch.Text = "";
SearchString = "";

Imports System
Imports System.Text.RegularExpressions
Imports System.Web.UI
Public Class _Default
Inherits System.Web.UI.Page
'  Create a String to store our search results
Private SearchString As String = ""
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
End Sub

Public Function HighlightText(ByVal InputTxt As String) As String
Dim Search_Str As String = txtSearch.Text
' Setup the regular expression and add the Or operator.
Dim RegExp As Regex = New Regex(Search_Str.Replace(" ", "|").Trim, RegexOptions.IgnoreCase)
' Highlight keywords by calling the
'delegate each time a keyword is found.
Return RegExp.Replace(InputTxt, New MatchEvaluator(AddressOf ReplaceKeyWords))
End Function

Public Function ReplaceKeyWords(ByVal m As Match) As String
Return ("<span class=highlight>" + m.Value + "</span>")
End Function

Protected Sub btnSearch_Click(ByVal sender As Object, ByVal e As ImageClickEventArgs)
'  Set the value of the SearchString so it gets
SearchString = txtSearch.Text
End Sub

Protected Sub btnClear_Click(ByVal sender As Object, ByVal e As ImageClickEventArgs)
'  Simple clean up text to return the Gridview to it's default state
txtSearch.Text = ""
SearchString = ""
End Sub
End Class
Here don’t forgot to set the connection string in web.config file here I am getting database connection from web.config file for that reason you need to set the connectionstring in web.config file like this

<add name="dbconnection" connectionString="Data Source=SureshDasari;Integrated Security=true;Initial Catalog=MySampleDB"/>

Download sample code attached

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pavithra said...

Great work sir, I am searching for this code from long time..thnx

Anonymous said...

Very Easy and useful way for my Difficulty

PP said...

Thanks sir for ur valuable guidenace

Vinoth said...

thank u sir greate work.........,

Anonymous said...

What if your column you're searching for has spaces? How would you return that value?

yasir said...

Very Very Nice Site. Excellent Work Done.

Thanks Team of web

Jatin rana said...

hello sir,
wil u plz make the same project with the help of datareader. i need it in my project

Anonymous said...

Very nice!!! Great work

Mohanbabu said...

superb very useful site for all ...

Thanks to suresh.

Anonymous said...

Awesome!! Thanks so much for the useful info. :)

BrianK said...

Am i missing something here? Because when i click my search button im not getting anything?

Anonymous said...

I did not get anything either.

Anonymous said...

nice post suresh.

Unknown said...

how to hight light bound field meand 'Datafield" in gridview

Unknown said...

how to hight light bound field meand 'Datafield" in gridview

Unknown said...

hi sir ....
It is not working
it just display all data from database
and not highlight any row when i am search....

Suresh Dasari said...

@Chetan patil...
Check your code I hope you did mistake in highlight text method.

Anonymous said...

hi sir.....
how to use this article in with mvc .

please help me

Anonymous said...

owsome thanks bro

Unknown said...

This is great suresh. Any idea how can i highlight the whole row instead? Thanks in advance.

Anonymous said...

Hi, thanks for sharing the way, how about multiple search text fields?I'm having prob with it.

vikalpa said...

Thank you very much for supporting the new programmers. Most of the posting helps me a lot, n' i hope its same with most of others..

Bikalpa Nepal

Unknown said...

Simple and useful, thanks!

Unknown said...

i want it windows application can u guys help me out

Unknown said...

i want it windows application can u guys help me out

Asha said...

Hello Sir,
Sir can you please help me i am writing code to search the files in a folder with keyword search if i have 100 doc file in the search textbox if i enter the word java, C# i need to get only those doc file which has java C# in it. i have done little coding but its displaying all files which is there in folder not the.

Help said...

Hi Suresh,
Can tell me example on Gridview
Display two tables data in a single gridview,
Not for all clolumns data some columes only

That tables are PK and FK relation)

With out relation also
Plz give me example on this

PavanKumar S K said...

Hi Suresh,
Can you help me in scrolling images
using jquery with and c#

Basu said...

Hello Sir i need this code with Datasource not with Datasourceid can you please show me that i need that urgent my all connection has done with datacourse

Priya said...

OnClicking back button, the highlighted text is not losing its style, the highlighted text still gets displayed.

panda239 said...
This comment has been removed by the author.
panda239 said...

hot to write it using C#???


if i use two or three textbox to find result then what should i do

Unknown said...

Sir, I want to filter rows in grid view using mobile number on text Changed events plz help me

My Fitness Bucket said...

Great Work ........Found this

My Fitness Bucket said...

How it will work to search in last name and Location also

Unknown said...

Thanks sir
for guidenace

Sumit said...

I took same GridView & one View button. If we clicks on view button, the data in this row should be displayed in respective textbox controls. Is there any way for Row_command event of Gridview ??
Pls help me out...
Thanks in Advanced


Abhinavsingh993 said...

It is as great and simple like you, You are such a champion coder.

Ajay said...

very nice

Anonymous said...

Can i have this code in

Anonymous said...

Hi Suresh,

How to search the Username or last name ,
If I enter Username or last in txtSearch.Text name result has to Highlight.
Please tell me .

priyanka soni said...

pls tell me how to apply filters for each row in grid in c# window application....urgent

Unknown said...

Dear Sir,

So can we run or make this program without Because i prefer not to use with websit.

Kind regards,


Anonymous said...

Great Work...Thank you so much.. keep it up.

Anonymous said...

Nice One

Anonymous said...

How would we filter with more that 1 column. For example, what if I want the capability to filter the results using either the username or the last name?

Anonymous said...

i have got the error as:--- "The name 'Bind' does not exist in the current context int the line- "
please help me out asap????

Kumar Aryan said...

Please bind grid view data from aspx.cs page then how it possible this search please suggest me.
I don't want to bind data using this....

please please please....

My Fitness Bucket said...

How Can we Use in this ..Autogenrated Edit or delete buttons

Anonymous said...

Mr. suresh. do you want to develop web application for my company.
please email on

Anonymous said...

I want images as search result.How to get it?

Unknown said...

Thanku for gud & simple coding suresh ji

Anonymous said...

return span class=highlight>" + m.Value + "span
this is not working

Unknown said...

sir its not working, i am facing one error

Server Error in '/GridviewWithSearch' Application.

Invalid object name 'UserInformation'.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Invalid object name 'UserInformation'.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


Dear Sir,
can u help me plz...
I want code for searching on grid view COLUMN WISE using only jquery (NOT WRITE ON ANY .NET CODE)


Dear Sir,
I have one `grid view` with 4 columns like

FromAddress ToAddress Subject Password
=========== ========== ======= ========

Now Search the `grid view` From Column Wise Depends up on Particular `TextBox` that means I have Four `TextBox's` For Four `Grid-view` columns.

My main requirement is if we enter the FromAddress like in FromAddress TextBox at that time search the first column and then find any value in that column that values are highlight and at the same time I entered data as in SECOND COLUMN ToAddress then find the values from filtered data in gridview using only jquery AND KEYUP().

This is possible or not with gridview
Thank You.

Prakash Vidwans said...

If text isn't found in current gridview , how can i popup the window as "Text Not Found" with highlighted text?
Thanks !

Unknown said...

Hello Sir,
I have a problem in my project i want to show the user's data when he login only his data retrive from database according to his username and display in a gridview after a login page...
please post the code its urgent.

Anonymous said...

dear sir i request you to also add the database file with your that new users can find it easy to some of them direct copy paste code and debug it and can understand it and implement it in their project.thank you

Unknown said...

this article is as great as ever

Hemant kumar Rout said...

How to open a website in one network only.
Restricted in outside network.

Anonymous said...

hi Suresh first of all thank you for your contribution in dot net.

here i need favour that same above code on key press event .
Thank you in advance.

Ria Rizky Fatmawati :) said...

Thank you so much. very usefull, working fine 100% :))))

Anonymous said...

not working even the css has not been loaded, don't know where m wrong.. #help_please

Anonymous said...

i have done but the selected parts are not highlighted

Unknown said...

How we done the same functionality on Keypress

Unknown said...

May u forget to write CSS of highlight text

Anonymous said...

hii sir i want code of searching many in textbox with a sepperator of comma,and dispalying them in grid view

Anonymous said...

Dear suresh,
Will you please filter if that exists in any of all the columns. and the columns also generating dynamically. so we don't know the column names also. please work on that.

Unknown said...

Hello sir
I want to show all records of particular employee based on entered employeeid in textbox and all record should come in respect to textbox for updating. can you guide me for this

Nikita gyanchandani said...

Amazing.. It worked.. thanks.

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