Search record from database with multiple words using C# and VB.Net in ASP.Net

Hi nauna,

Check this sample. now take its reference.

Database

For this example I have used of Northwind database that you can download using the link given below.

Download Northwind Database

HTML

<asp:TextBox runat="server" ID="txtCountry" />
<asp:Button Text="Search" runat="server" OnClick="OnSearch" />
<hr />
<div style="width: 330px; height: 200px; overflow: auto;">
    <asp:GridView runat="server" ID="gvCustomers" AutoGenerateColumns="false" Width="100%">
        <Columns>
            <asp:BoundField DataField="CustomerID" HeaderText="Id" />
            <asp:BoundField DataField="ContactName" HeaderText="Name" />
            <asp:BoundField DataField="Country" HeaderText="Country" />
        </Columns>
    </asp:GridView>
</div>

Namespaces

C#

using System.Configuration;
using System.Data;
using System.Data.SqlClient;

VB.Net

Imports System.Configuration
Imports System.Data
Imports System.Data.SqlClient

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    BindCustomers("");
}

protected void OnSearch(object sender, EventArgs e)
{
    string country = txtCountry.Text.Trim();
    this.BindCustomers(country);
}

private void BindCustomers(string country)
{
    string query = "SELECT CustomerID,ContactName,Country FROM Customers ";
    if (!string.IsNullOrEmpty(country))
    {
        string[] countryName = country.Split(' ');
        List<string> countries = new List<string>();

        foreach (string countryy in countryName)
        {
            countries.Add(countryy);
        }
        country = "'" + string.Join("','", countries.ToArray()) + "'";
        query += " WHERE Country IN(" + country + ")";
    }
    using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ConnectionString))
    {
        using (SqlCommand cmd = new SqlCommand(query, con))
        {
            cmd.CommandType = CommandType.Text;
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                sda.SelectCommand = cmd;
                DataTable dt = new DataTable();
                sda.Fill(dt);
                this.gvCustomers.DataSource = dt;
                this.gvCustomers.DataBind();
            }
        }
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    BindCustomers("")
End Sub

Protected Sub OnSearch(ByVal sender As Object, ByVal e As EventArgs)
    Dim country As String = txtCountry.Text.Trim()
    Me.BindCustomers(country)
End Sub

Private Sub BindCustomers(ByVal country As String)
    Dim query As String = "SELECT CustomerID,ContactName,Country FROM Customers "
    If Not String.IsNullOrEmpty(country) Then
        Dim countryName As String() = country.Split(" "c)
        Dim countries As List(Of String) = New List(Of String)()
        For Each countryy As String In countryName
            countries.Add(countryy)
        Next
        country = "'" & String.Join("','", countries.ToArray()) & "'"
        query += " WHERE Country IN(" & country & ")"
    End If

    Using con As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("constr").ConnectionString)
        Using cmd As SqlCommand = New SqlCommand(query, con)
            cmd.CommandType = CommandType.Text
            Using sda As SqlDataAdapter = New SqlDataAdapter()
                sda.SelectCommand = cmd
                Dim dt As DataTable = New DataTable()
                sda.Fill(dt)
                Me.gvCustomers.DataSource = dt
                Me.gvCustomers.DataBind()
            End Using
        End Using
    End Using
End Sub

Screenshot