Search (Filter) multiple ASP.Net TextBox values from single column using C# and VB.Net

Hi Bhavesh23,

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

Database

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

Download Northwind Database

HTML

First: <asp:TextBox ID="txtFirst" runat="server" /><br />
Middle: <asp:TextBox ID="txtMiddle" runat="server" /><br />
Last: <asp:TextBox ID="txtLast" runat="server" /><br />
<asp:Button Text="Search" runat="server" OnClick="OnSearch" />
<hr />
<asp:Label ID="lblName" runat="server" />

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 OnSearch(object sender, EventArgs e)
{
    string first = txtFirst.Text.Trim();
    string middle = txtMiddle.Text.Trim();
    string last = txtLast.Text.Trim();

    string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    string query = "SELECT * FROM                                                                       " +
                    "(                                                                                   " +
                    "    SELECT CustomerID, ContactName, City, Country,                                  " +
                    "       REVERSE(PARSENAME(Replace(REVERSE(ContactName), ' ', '.'), 1)) AS FirstName, " +
                    "       REVERSE(PARSENAME(Replace(REVERSE(ContactName), ' ', '.'), 2)) AS MiddleName," +
                    "       REVERSE(PARSENAME(Replace(REVERSE(ContactName), ' ', '.'), 3)) AS LastName   " +
                    "    From Customers                                                                  " +
                    ")t                                                                                  " +
                    "WHERE t.FirstName LIKE '%' + @First + '%'                                           " +
                    "AND t.MiddleName LIKE '%' + @Middle + '%'                                           " +
                    "AND t.LastName LIKE '%' + @Last + '%'";
    using (SqlConnection con = new SqlConnection(conString))
    {
        SqlCommand cmd = new SqlCommand(query);
        cmd.Parameters.AddWithValue("@First", first);
        cmd.Parameters.AddWithValue("@Middle", middle);
        cmd.Parameters.AddWithValue("@Last", last);
        using (SqlDataAdapter sda = new SqlDataAdapter())
        {
            cmd.Connection = con;
            sda.SelectCommand = cmd;
            using (DataTable dt = new DataTable())
            {
                sda.Fill(dt);
                this.lblName.Text = Convert.ToString(dt.Rows[0]["ContactName"]);
            }
        }
    }
}

VB.Net

Protected Sub OnSearch(ByVal sender As Object, ByVal e As EventArgs)
    Dim first As String = txtFirst.Text.Trim()
    Dim middle As String = txtMiddle.Text.Trim()
    Dim last As String = txtLast.Text.Trim()
    Dim conString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Dim query As String = "SELECT * FROM                                                                       " +
                            "(                                                                                   " +
                            "    SELECT CustomerID, ContactName, City, Country,                                  " +
                            "       REVERSE(PARSENAME(Replace(REVERSE(ContactName), ' ', '.'), 1)) AS FirstName, " +
                            "       REVERSE(PARSENAME(Replace(REVERSE(ContactName), ' ', '.'), 2)) AS MiddleName," +
                            "       REVERSE(PARSENAME(Replace(REVERSE(ContactName), ' ', '.'), 3)) AS LastName   " +
                            "    From Customers                                                                  " +
                            ")t                                                                                  " +
                            "WHERE t.FirstName LIKE '%' + @First + '%'                                           " +
                            "AND t.MiddleName LIKE '%' + @Middle + '%'                                           " +
                            "AND t.LastName LIKE '%' + @Last + '%'"

    Using con As SqlConnection = New SqlConnection(conString)
        Dim cmd As SqlCommand = New SqlCommand(query)
        cmd.Parameters.AddWithValue("@First", first)
        cmd.Parameters.AddWithValue("@Middle", middle)
        cmd.Parameters.AddWithValue("@Last", last)
        Using sda As SqlDataAdapter = New SqlDataAdapter()
            cmd.Connection = con
            sda.SelectCommand = cmd

            Using dt As DataTable = New DataTable()
                sda.Fill(dt)
                Me.lblName.Text = Convert.ToString(dt.Rows(0)("ContactName"))
            End Using
        End Using
    End Using
End Sub