Search highlight GridView results of all columns in Access database using C# and VB.Net in ASP.Net

Hi tareq24bd,

Check this example. Now please take its reference and correct your code.

HTML

Search:<asp:TextBox ID="txtSearch" runat="server" />
<asp:Button Text="Search" runat="server" OnClick="OnSearch" />
<hr />
<asp:GridView ID="gvCustomers" runat="server" AutoGenerateColumns="false" OnRowDataBound="OnRowDataBound">
    <Columns>
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:BoundField DataField="City" HeaderText="City" />
        <asp:BoundField DataField="Country" HeaderText="Country" />
    </Columns>
</asp:GridView>

Namespaces

C#

using System.Data;
using System.Data.OleDb;
using System.Text.RegularExpressions;

VB.Net

Imports System.Data
Imports System.Data.OleDb
Imports System.Text.RegularExpressions

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        this.BindGrid();
    }
}

protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        e.Row.Cells[0].Text = Regex.Replace(e.Row.Cells[0].Text, txtSearch.Text.Trim(), delegate (Match match)
        {
            return string.Format("<span style = 'background-color:#FFFF0C'>{0}</span>", match.Value);
        }, RegexOptions.IgnoreCase);
        e.Row.Cells[1].Text = Regex.Replace(e.Row.Cells[1].Text, txtSearch.Text.Trim(), delegate (Match match)
        {
            return string.Format("<span style = 'background-color:#FFFF0C'>{0}</span>", match.Value);
        }, RegexOptions.IgnoreCase);
        e.Row.Cells[2].Text = Regex.Replace(e.Row.Cells[2].Text, txtSearch.Text.Trim(), delegate (Match match)
        {
            return string.Format("<span style = 'background-color:#FFFF0C'>{0}</span>", match.Value);
        }, RegexOptions.IgnoreCase);
    }
}

protected void OnSearch(object sender, EventArgs e)
{
    this.BindGrid();
}

private void BindGrid()
{
    string constr = @"Provider=Microsoft.ACE.OLEDB.12.0; Data Source=C:\\Users\\developer4\\Desktop\\Database1.accdb";
    using (OleDbConnection con = new OleDbConnection(constr))
    {
        using (OleDbCommand cmd = new OleDbCommand())
        {
            cmd.CommandText = "SELECT * FROM Employees WHERE Name LIKE '%' + @Search +  '%' OR City LIKE '%' + @Search +  '%' OR Country LIKE '%' + @Search +  '%'";
            cmd.Connection = con;
            cmd.Parameters.AddWithValue("@Search", txtSearch.Text.Trim());
            DataTable dt = new DataTable();
            using (OleDbDataAdapter sda = new OleDbDataAdapter(cmd))
            {
                sda.Fill(dt);
                gvCustomers.DataSource = dt;
                gvCustomers.DataBind();
            }
        }
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Me.BindGrid()
    End If
End Sub

Protected Sub OnRowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
    If e.Row.RowType = DataControlRowType.DataRow Then
        e.Row.Cells(0).Text = Regex.Replace(e.Row.Cells(0).Text, txtSearch.Text.Trim(),
                                            Function(ByVal match As Match) String.Format("<span style = 'background-color:#FFFF0C'>{0}</span>",
                                                                                            match.Value), RegexOptions.IgnoreCase)
        e.Row.Cells(1).Text = Regex.Replace(e.Row.Cells(1).Text, txtSearch.Text.Trim(),
                                            Function(ByVal match As Match) String.Format("<span style = 'background-color:#FFFF0C'>{0}</span>",
                                                                                            match.Value), RegexOptions.IgnoreCase)
        e.Row.Cells(2).Text = Regex.Replace(e.Row.Cells(2).Text, txtSearch.Text.Trim(),
                                            Function(ByVal match As Match) String.Format("<span style = 'background-color:#FFFF0C'>{0}</span>",
                                                                                            match.Value), RegexOptions.IgnoreCase)
    End If
End Sub

Protected Sub OnSearch(ByVal sender As Object, ByVal e As EventArgs)
    Me.BindGrid()
End Sub

Private Sub BindGrid()
    Dim constr As String = "Provider=Microsoft.ACE.OLEDB.12.0; Data Source=C:\\Users\\developer4\\Desktop\\Database1.accdb"
    Using con As OleDbConnection = New OleDbConnection(constr)
        Using cmd As OleDbCommand = New OleDbCommand()
            cmd.CommandText = "SELECT * FROM Employees WHERE Name LIKE '%' + @Search +  '%' OR City LIKE '%' + @Search +  '%' OR Country LIKE '%' + @Search +  '%'"
            cmd.Connection = con
            cmd.Parameters.AddWithValue("@Search", txtSearch.Text.Trim())
            Dim dt As DataTable = New DataTable()
            Using sda As OleDbDataAdapter = New OleDbDataAdapter(cmd)
                sda.Fill(dt)
                gvCustomers.DataSource = dt
                gvCustomers.DataBind()
            End Using
        End Using
    End Using
End Sub

Screenshot

Access db file

Output